RELF, RELF EX

MV switchgear with single busbar, withdrawable, metal-clad in air insulation. Provides high reliabilty in power distribution for demanding facilities.

Technical description

Rozdzielnica RelfThe catalogue presents RELF and RELF ex type medium voltage switchgear:

  • air insulated (AIS),
  • in metal enclosure,
  • metal - clad,
  • withdrawable,
  • with a single busbar,
  • for a rated voltage up to 36 kV,
  • for indoor use.

Characteristics of the switchgear

Description

  • The switchgear is designed to operate in distribution transformer stations in industrial sites which generate, distribute and consume electricity.
  • The switchgear complies with the requirements of (PN-EN) IEC 62271-200, (PN-EN) IEC 62271-1 and GOST, provides IP4X degree of protection. It is designed to work in normal conditions defined by the (PN-EN) IEC 62271-1 standard.
  • The switchgear is designed to assure safety during normal operation, inspection and handling.
  • The switchgear cubicle is of a frameless construction, made of galvanized steel sheets and fixed with rivets. It is in the form of a multicompartment cabinet, with walls and partitions that form a self-supporting structure.
  • There are four compartments in the switchgear bay: cable connections, busbars, withdrawable main device and LV auxiliary circuits compartment.
  • The cabinet's door and side shields of the outermost bays (back shields for wall mounted cubicles) are powder coated.

Types of bays

The switchgear may be composed of various functional units.
These are:

  • incoming/outgoing feeder bays,
  • bus coupler bays,
  • bus riser bays,
  • metering bays with the possibility of busbars earthing,
  • switch disconnector bay,
  • others - acc. to arrangements.

The withdrawable module of the switchgear may be equipped with a circuit breaker, contactor, sectionalizer or a set of fused voltage transformers. The withdrawable module may be placed in the positions of: service, test/disconnection and separation.

Characteristic and advantages

  • air insulated,
  • optional electrical drives for all switches - fully automated switchgear,
  • Loss of Service Continuity category - LSC2B (three MV compartments),
  • possibility of equipping with current and voltage sensors - environmentally friendly solution,
  • IAC AFLR internal arc classification,
  • interlocks and protections against performing incorrect switching operations,
  • wall-standing or free-standing options,
  • optional thermal imaging measurements of cable connections or temperature monitoring system,
  • possibility of expanding the switchgear with additional bays,
  • possibility of bay replacement without the need to draw aside the adjacent bays,
  • ease of operation.

The switchgear ensures high safety of operation through:

  • internal arc resistance of the switchgear enclosure,
  • improper switching operations interlocks and door locks and interlocks,
  • racking the withdrawable module with doors closed,
  • the use of compartments with PM class partitions,
  • the possibility of visual control of switching operations through inspection windows,
  • the use of blow-out flaps which limit the pressure increase in case of an internal arcing fault,
  • optional gas exhausting duct - discharges gases outside of the switching station room,
  • bay voltage indication system.

Basic technical data

Basic technical data

Compliance with standards:
The RELF type switchgear meets the requirements of the following standards:

  • (PN-EN) IEC 62271-1 - „High-voltage switchgear and controlgear. Common specifications”,
  • (PN-EN) IEC 62271-200 - „High-voltage switchgear and controlgear. AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV”.

The switchgear is certified by appropriate accredited bodies.

Electrical data:
 
RELF
RELF ex
Rated voltage [kV]
12
17,5
24
36; 40,5*
12 / 17,5
Main busbars and incoming feeder rated continuous current [A]
630 - 4000
630 - 2500
630 - 2500
630 - 1600
630 - 2500
Rated power-frequency withstand voltage [kV]
28
38
50
95;
85,5(5min)
/95(1min)
28; 38
Rated lightning impulse withstand voltage [kV]
75
95
125
190
75; 95
Rated frequency [Hz]
50
Rated short-time withstand current [kA/3s]
up to 40
up to 31,5
up to 31,5
up to 25
(up to 31,5/1s)
up to 25
Rated peak withstand current [kA]
up to 100
up to 80
up to 80
63/80
up to 63
Withstand for internal arcing fault [kA]
up to 31,5/1s
up to 40/0,5s
up to 31,5/1s
up to 31,5/1s
up to 25/1s
up to 25/1s
Degree of protection  
up to IP4X (IP3X for 4000A)
Cubicle height [mm]
22001)
22001)
22501)
2550
2250
Cubicle width [mm]
600-950 (650-1000)
600-950
(800-1000)
800/1000
1300
650/800/1000
Cubicle depth [mm]
1250/1575/1675
1250/1575/
1675
1600/1688/1725
2035
1375/1388
Compliance with standards  
(PN-EN) IEC 62271-200; (PN-EN) IEC 62271-1
Service conditions:
Ambient temperature Relative humidity
- peak short-time+40oC
- highest day average95%
- highest day average +35oC
- highest month average90%
- highest annual average +20oC
- highest day average vapour pressure2,2kPa
- lowest long-term-5oC
- highest month average vapour pressure1,8kPa
Atmosphere at the place of installation
no significant contamination with salt, vapour, dust,
smoke, flammable or corrosive gasses
and lack of icing, frosting and dewing
Installation altitude
up to 1000 m. a.s.l.2)
Vibrations
vibrations caused by external factors
or earthquakes negligible

Note:

  1. - bay height may differ due to construction and height of the LV compartment. Details should be arranged with the manufacturer,
  2. - if the switchgear installation altitude is higher than 1000 m. a.s.l. the switchgear insulation level should be corrected in accordance with the standard.

Switchgear design

Design

The RELF switchgear bay is designed as a cabinet divided into four separate functional compartments:

  1. busbars compartment (medium voltage circuits),
  2. main device compartment (medium voltage circuits),
  3. cable compartment (medium voltage circuits),
  4. auxiliary circuits LV compartment (low voltage circuits).
RELF version I
RELF construction version I
RELF version II
RELF construction version II
RELF 36
RELF 36 construction
RELF ex
RELF ex construction

The switchgear cubicle is constructed of bent steel sheets, riveted together, without welding. Walls and partitions create a selfsupporting structure. A corrosion-resistant zinc-coated sheet is used for the construction of cabinets.

High-strength round-head steel rivets were used to connect structural elements. Functional compartments are limited by internal vertical and horizontal partitions. The internal partitions are attached to side walls, reinforcing and stabilising the entire enclosure. Additionally, two-part side covers made of painted sheet are bolted to the external walls of the outer bays of the switchgear.

The switchgear may be constructed as free-standing or wall-standing. The front belt between the doors of the main device compartment and the doors to the cable connection compartment and the horizontal partition between these compartments are removable (does not apply to the RELF 36 version), which significantly facilitates maintenance and installations.

Internal partitions allow safe access to main device compartment and cable connection compartment, even when the primary busbars are live.

In accordance with the LSC (Loss of Service Continuity) category, the switchgear meets the criteria of LSC2B. This condition is met by switchgear with three MV compartments and the withdrawable module placed in the test/disconnection position.

The MV circuits compartment doors are made of powder coated sheet. Doors use hinges and bolts which can stand up to explosiontype loads. The hinges allow opening the doors by approximately 135º (170º in case of RELF 36). Upper and lower edges of the doors were reinforced by appropriately shaped and welded reinforcing profiles.

Doors to the main device compartment are equipped with an inspection window used for visual control of the position of the withdrawable module and switching operations.

The design of the doors allows the mechanical opening of the circuit breaker in operating position with the doors closed.

Blow-out flaps

All MV compartments have blow-out duct openings in their top zone, closed with flaps. Their task is to discharge any pressure created inside the compartment as a result of an internal arc fault.

A sudden increase of pressure inside the switchgear compartment breaks the plastic bolts and opens the flaps, which may activate limit switches installed at the roof of the switchgear. Limit switches activated by the flaps being opened send an impulse which trips the main circuit breaker. This allows limiting the effects of an arc fault generated inside the cubicle compartment.

Withdrawable module

The withdrawable module is a unit composed of a racking system, and depending on the bay function: circuit breaker, contactor, set of fused voltage transformers, or a sectionalizer. The racking system performs the physical connection of the withdrawable module with the switchgear bay. It's stationary part is connected with the bay by interlocking on both sides in guide rail cut-outs.

The moving part of the racking system is shifted between the service position and the test/disconnection position using a drive screw operated manually with a crank, or with an electric drive, while the doors are closed. The service and test/disconnection position is signalled by position indicators, after the module reaches an appropriate position.

The shutters in the main device compartment are discussed in the main device compartment description.

Cubicle compartments

The busbars compartment is inaccessible during normal operation. For maintenance purposes access to busbars is possible from the top of the cabinet, after removing the blow-out flaps (or from the main device compartment side after removing the partition - for RELF 36). It is closed on both sides with gland plates made of non-magnetic steel sheet or insulating material. These plates prevent damage from spreading to adjacent bays in case of an electric arc in the busbars compartment.

Gland plates and bushings insulators are elements which support the busbars. Outgoing busbars branch off from the main busbars and enter the spouts which separate the busbar compartment from the main device compartment.

The main device compartment is available after its doors are open in an interlock-controlled mode. The main device compartment contains the withdrawable module and all the elements necessary for its operation with the cubicle bay, such as: withdrawable module guide rails, shutters, spouts with fixed contacts, door interlock and earthing switch interlock elements and auxiliary circuits socket/plug.

The spouts are installed in the partition separating the main device compartment from the cable connection compartment and busbars compartment. Fixed contacts and outgoing busbars are set in the spouts.

The shutters with an unlocking mechanism are installed in the main device compartment. Their task is to separate the compartment space from fixed contacts, which may be live when the withdrawable module is in the test/disconnection or separation position. A safe insulation space remains between the contacts and the closed shutters.

Racking in the withdrawable module from the test/disconnection position to the operating position causes the shutters to slide apart and the fixed contacts to be exposed, allowing the circuit breaker tulip contacts to connect.

Mechanical indicators of the circuit breaker position and drive charging state are visible through the inspection window.

The cable connection compartment is designed to connect cables or busbars and is accessible after opening only the front doors (wall-standing version) or front and rear doors (free-standing version) in an interlock-controlled mode1). This compartment contains current transformers, an earthing switch, and depending on operational requirements, optionally: voltage transformers2), earth fault transformers and surge arresters.

Voltage transformers are installed in the front part of the connection compartment (not in RELF 36kV).

The earthing switch is equipped with a manual drive, or a manual and motor drive. Its status is indicated by the position indicator.

The compartment bottom is closed by a split floor cover, which also acts as a cable gland plate. Openings in the plate are covered with rubber cable glands. Cable clamps installed on supports are used to fasten the cables.

The auxiliary circuits LV compartment is constructed in the form of a control cubicle and is completely separated from the high voltage zone of the switchgear. The cubicle has its own sheet metal enclosure and is prefabricated independently of the high power part of the switchgear. It may be equipped with devices on a separate station, and then attached to the switchgear cabinet.

The cubicle is intended for the installation of: protection relays and IEDs, instrumentation & control devices and automation system elements.

It is installed on the roof of the switchgear, above the switching device compartment. In its bottom, top and side walls a series of openings are made for lead and cable glands and cable trays. These openings are covered by plates, in which holes can be made according to design needs. An assembly plate fixed to the rear wall of the LV cubicle was designed for the installation of devices. The devices may be also fixed on the side walls. On arrangement with the manufacturer, the cubicle design may be adapted to individual needs of the customer and of the design.

Main busbars

A single, three-phase busbar system is used in the switchgear. The busbars are installed in a separate compartment.

The main busbars are supported by distribution busbars which come out of the spouts and on insulating bushings installed in the side partitions.

Busbar cross-sections are selected in accordance with the rated current of the switchgear.

Insulating elements

The switchgear uses epoxy resin insulators. In the connection compartment the busbars are supported by post insulators.

For supporting the main busbars and passing them through switchgear bays, bushings are used, set in the gland plates of the bay side walls.

The passages through the partition between the switching device compartment and the busbars compartment and the connection compartment are provided by spouts.

Protective earthing

An earthing conductor is placed in every cabinet, in the form of a copper busbar with a cross-section of 40x10 mm, placed at the bottom of the cabinet. These busbars are bridged between the cabinets, creating an earthing conduit. The conduit is terminated by terminals on the left and right side of the switchgear, used to connect it to the facility's earthing system.

Cable connections

The connection compartments are designed for entry of single- or multi-core MV cables.

1) in the RELF 36 version the connection compartment is accessible after opening the cabinet doors and removing the partition on the side of the switching device compartment.
2) does not apply to the RELF 36 version.

System of interlocks and protections

The switchgear may be equipped with a range of standard and additional mechanical and electrical interlocks, intended to improve operational safety:
Mechanical interlocks:

  1. prevent racking the withdrawable module in or out of the operating position when the circuit breaker is closed,
  2. allow the closing and opening of the circuit breaker only in the operating and test/disconnection positions,
  3. allow the closing of the earthing switch only in the test/disconnection or separation position of the withdrawable module,
  4. prevent racking in the withdrawable module from the test/disconnection position to the operating position if the earthing switch is closed,
  5. prevent opening the switching device compartment door if the withdrawable module is in the operating or intermediate position,
  6. prevent opening the cable compartment door (or bay door in the RELF 36 version) if the earthing switch is open,
  7. allow changing the position of withdrawable module only when it is locked in a bay,
  8. prevent racking in the withdrawable module from the test/disconnection position to the operating position if the compartment door is open (optional),
  9. prevent racking in the withdrawable module from the test/disconnection position to the operating position until the circuit breaker control circuits supply plug is connected to the circuit breaker (option - contact the manufacturer),
  10. prevent racking in the withdrawable module from the test/disconnection position to the separation position until the circuit breaker control circuits supply plug is set to the separation position (option - contact the manufacturer),
  11. a servicing truck for the transporting of withdrawable modules may be equipped with a secure bay coupling mechanism, which prevents changing the position of the racking truck even when its wheels are unlocked (optional),
  12. a servicing truck for the transporting of withdrawable modules may be constructed in a way that allows moving the withdrawable module from the truck to the bay only after mechanical coupling of the truck with the bay (optional),
  13. a servicing truck for the transporting of withdrawable modules may be constructed in a way that allows uncoupling the truck from the bay only after the withdrawable module is locked in the bay or in the truck,
  14. allow locking the drive of shutters which cover the fixed contacts in the switching device compartment (optional),
  15. allow locking access to the earthing switch operating mechanism latch.

The cable connection compartment door lock is constructed to allow closing and locking the door after it has been opened and the earthing switch has been set to the OPEN (de-earthed) position with the doors open. Afterwards, the interlock prevents opening the door again until the next earthing operation.

On arrangement with the manufacturer it is possible to use additional key and padlock interlocks.

 

Electrical interlocks:

  1. prevent closing the circuit breaker if its auxiliary circuits are not powered; only mechanical opening of the circuit breaker is possible (optional),
  2. prevent racking the withdrawable module to the operating position without power supply to the control circuits (optional),
  3. prevent access to the earthing switch drive when closing of the earthing switch requires additional conditions (for example, main busbar earthing switch can be closed only when the withdrawable modules in the particular section are in the test/disconnection position),
  4. prevent access to the withdrawable module drive when racking the module requires additional conditions.

Interlocks are always designed to fit to a particular project.

On arrangement with the switchgear's manufacturer, it is possible to install additional interlocks, which operate based on limiting switches and electromagnetic locks.

The door design allows them to be unlocked in an emergency and the compartment to be accessed when needed.

Switchgear equipment

Switching devices

The switchgear may be equipped as standard with VB-4 (ZPUE), SION (Siemens), VD4 (ABB), HVX (Schneider Electric) vacuum circuit breakers; HD4 (АВВ) gas insulated circuit breakers; 3TM (Siemens), ConVac (ABB) contactors. Other devices may be used on arrangement with the switchgear manufacturer. A fast earthing switch type US1 (ZPUE) or EK6 (ABB) is used to provide the highest level of safety. As standard, NAL/NALF (ABB) type devices are used as switch disconnectors.

 

Metering instrumentation

Transformers by different manufacturers are used for metering purposes. Bay voltage indication utilizes capacitive insulators or transformers with voltage dividers and a voltage indicator.

 

Protection devices

The switchgear can be equipped with low voltage devices by any manufacturer, according to the individual needs of the customer. It is also possible to install any digital protection relay, or IED.

An internal arc protection system can be installed in the switchgear. The systems sense the internal arc by detecting the flash and an additional voltage or current criteria inside the protected switchgear. When these two events occur simultaneously, the system is activated and a circuit breaker tripping impulse is sent.

Diagrams of primary and auxiliary circuits, switchgear automation

Primary circuits

Structural diagrams of primary circuit examples are shown on Figure 2. The connection compartment's equipment varies depending on the bay type. Alternative solutions to the ones presented can be implemented on arrangement with the manufacturer.

 

Auxiliary circuits

LV auxiliary circuits consist of: protection relays, metering, control, automation and signalling systems. An auxiliary circuits compartment located at the front, top part of the switchgear cabinet is intended for the devices of these circuits.

The dimensions of the compartment and example arrangement of devices are presented on figures 3 and 4.

Diagrams of example internal and assembly connections for primary and auxiliary devices for a typical switchgear equipment can be obtained by contacting the switchgear manufacturer.

 

Switchgear automation

The switchgear is designed to operate in SCADA systems. With this goal in mind it is equipped with digital protection relays (with possible digital communication) and automation systems. The switchgear can then operate in master control systems and automated control systems.

Switchgear packaging, transport and installation

Packaging
Three packaging methods are used for RELF type switchgears:

  1. standard packaging - the switchgear cubicle is placed on a pallet and wrapped with shrink wrap,
  2. in boxes - switchgear cubicles are packaged as described above and put into boxes,
  3. maritime transport packaging - switchgear cubicles with inserted moisture absorbing material are placed in barrier plastic sheet bags, which are evacuated. The switchgears protected in this manner are transported on pallets or in boxes.

 

Transport

Switchgears are transported as single cubicles. Transport in the room and to the room in which the switchgear is to be installed can be done with a crane, forklift, or on rollers.

For crane transport, the cubicle is equipped with transport lugs. The angle of lifting ropes should not exceed 120°. Attaching the lifting ropes directly to the cabinet structure is prohibited. To enable lifting the switchgear with a forklift, the cubicle is placed on a transport pallet.

During the transport and installation of the switchgear cubicle, special care should be taken to not to damage the paintwork and steel sheet enclosures.

Main devices, such as circuit breakers, contactors, withdrawable modules, and LV devices sensitive to vibrations, are transported separately in the manufacturers' original packages.

 

Switchgear installation

The manner of switchgear placement and external cable and busbar connections depend on the design of the facility where it will be installed. These connections should be performed according to the instructions established during arrangements with the switchgear manufacturer. The switchgears can be placed directly on concrete floor, on foundation frame attached to the floor, or on a steel or concrete structure of the facility.

Regardless of the type of foundation, switchgears must be placed exactly horizontally and attached to the foundation.

The placement of the switchgear in a room is presented on figures 5a,b,c. The X dimension depends on the manner in which the switchgear is placed:

  • for a wall-mounted placement the recommended distance is at least 100 mm,
  • for free-standing placement, full opening of the rear doors requires an X not less than the width of the widest bay of the switchgear.

Recommended minimum distance from closed safety flaps on the switchgear roof to the room ceiling: 600 mm.

Due to the switchgear installation technology it is recommended that the Y dimension of the room be at least 1000 mm higher than the total length of the switchgear.

The recommended minimum room doors height A for the switchgear should be higher by at least 350 mm than the height of the switchgear.

On figure 6a,b,c example dimensions for holes to be made in the floor for cable entries are shown. They should be treated as demonstrations, and their exact location agreed upon when ordering the switchgear.

On figure 7a,b the load bearing/installation frame of the RELF and RELFex switchgear is shown, with holes for attaching the switchgears to the foundation, on figure 8 - methods for attaching the switchgears to the foundation.

Standard equipment delivered with the switchgear

Standard equipment delivered with the switchgear
Each switchgear is equipped with:

  • fasteners for connecting all the units together,
  • withdrawable module racking crank,
  • earthing switch drive crank,
  • withdrawable module transport cart (with the exception of RELF 36),
  • cabinet key doors.

Documents delivered with the switchgear:

  • declaration of conformity,
  • switchgear manual,
  • operation and maintenance manuals and warranty cards for the used devices,
  • as-built documentation for the switchgear,
  • warranty card.

Drawings

List of figures

List of figures:

Figure 1a - RELF bay equipment - version I
Figure 1b - RELF bay equipment - version II
Figure 1c - RELF 36 bay equipment
Figure 1d - RELF ex bay equipment
Figure 2a - Structural diagrams of RELF and RELF ex primary circuits
Figure 2b - Structural diagrams of RELF 36 primary circuits
Figure 3a - RELF bay auxiliary circuits compartment - version I
Figure 3b - RELF bay auxiliary circuits compartment - version II
Figure 3c - RELF 36 bay auxiliary circuits compartment
Figure 3d - RELF ex bay auxiliary circuits compartment
Figure 4a - Examples of device layout in the RELF bays auxiliary circuits compartment
Figure 4b - Examples of device layout in the RELF ex bays auxiliary circuits compartment
Figure 5a - Placement of the RELF switchgear
Figure 5b - Placement of the RELF 36 switchgear
Figure 5c - Placement of the RELF ex switchgear
Figure 6a - Example dimensions of the cubicle bases and floor holes for RELF bays
Figure 6b - Example dimensions of the cubicle bases and floor holes for RELF 36 bays
Figure 6c - Example dimensions of the cubicle bases and floor holes for RELF ex bays
Figure 7a - RELF switchgear support frame
Figure 8 - Mounting the switchgear on the floor

Figure 1a - RELF bay equipment - version I

RELF bay equipment - version I

RELF bay equipment - version I
  1. main device: circuit breaker, contactor
  2. current transformers
  3. earthing switch
  4. voltage transformers
  5. spouts
  6. bushings
  7. capacitive post insulators
  8. main busbars
  9. outgoing busbars
  10. earth fault transformer
  11. earthing busbar
  12. shutters
  13. cable tray (optional)
  14. safety flaps

Figure 1b - RELF bay equipment - version II

RELF bay equipment - version II

RELF bay equipment - version II
  1. main device: circuit breaker, contactor
  2. current transformers
  3. earthing switch
  4. voltage transformers
  5. spouts
  6. bushings
  7. capacitive post insulators
  8. main busbars
  9. outgoing busbars
  10. earth fault transformer
  11. earthing busbar
  12. shutters
  13. cable tray (optional)
  14. safety flaps

Figure 1c - RELF 36 kv bay equipment

Wyposażenie pola RELF

Wyposażenie pola RELF
  1. main device: circuit breaker
  2. current transformers
  3. earthing switch
  4. surge arresters
  5. spouts
  6. bushings
  7. main busbars
  8. outgoing busbars
  9. earthing busbar
  10. shutters mechanism
  11. safety flaps
  12. protective relay

Figure 1d - RELF ex bay equipment

RELF ex bay equipment

RELF ex bay equipment
  1. withdrawable circuit breakers
  2. earthing switch
  3. current transformers
  4. voltage transformers (option)
  5. protection relay
  6. outgoing busbars
  7. bushings
  8. spouts
  9. safety flaps
  10. LV compartment
  11. earth fault transformer
  12. surge arresters

Figure 2a - Structural diagrams of RELF and RELF ex primary circuits

Structural diagrams of RELF and RELF ex primary circuits

Figure 2b - Structural diagrams of RELF 36 kV primary circuits

Structural diagrams of RELF 36 kV primary circuits

Figure 3a - RELF bay auxiliary circuits compartment - version I

RELF bay auxiliary circuits cubicle - version I

 

RELF bay auxiliary circuits cubicle - version I

Figure 3b - RELF bay auxiliary circuits compartment - version II

RELF bay auxiliary circuits cubicle - version II

 

RELF bay auxiliary circuits cubicle - version II

 

Dimensions [mm]  
H
600
600
600
400
400
400
S
995
795
645
995
795
645
H1
500
500
500
350
350
350
S1
900
700
550
900
700
550

Figure 3c - RELF 36 kV bay auxiliary circuits compartment

RELF 36 kV bay auxiliary circuits cubicle

 

RELF 36 kV bay auxiliary circuits cubicle

Figure 3d - RELF ex auxiliary circuits compartment

RELF ex auxiliary circuits cubicle

 

RELF ex auxiliary circuits cubicle

Figure 4a - Examples of device layout in the RELF bays auxiliary circuits compartment

Examples of device layout in the RELF bays auxiliary circuits compartment

Figure 4b - Examples of device layout in the RELF ex bays auxiliary circuits compartment

Examples of device layout in the RELF ex bays auxiliary circuits compartment

Figure 5a - Placement of the RELF switchgear

Placement of the RELF switchgear
Placement of the RELF switchgear

Notice:

In case of specific requirements that affect the switchgear cubicle dimensions, please contact the switchgear manufacturer.

Figure 5b - Placement of the RELF 36 kV switchgear

Placement of the RELF 36 kV switchgear
Placement of the RELF 36 kV switchgear
Notice:
In case of specific requirements that affect the switchgear cubicle dimensions, please contact the switchgear manufacturer.

Figure 5c - Placement of the RELF ex switchgear

Placement of the RELF ex switchgear
Placement of the RELF ex switchgear

 

Notice:
In case of specific requirements that affect the switchgear cubicle dimensions, please contact the switchgear manufacturer.

Figure 6a - Example dimensions of the cubicle bases and floor holes for RELF bays

Floor hole layout for cubicles with a width of 1000 mm
RELF - Floor hole layout for cabinets with a width of 1000 mm
Floor hole layout for cubicles with a width of 650 mm
RELF - Floor hole layout for cabinets with a width of 650 mm
Floor hole layout for the range of cubicles with a depth of 1250 mm
RELF - Floor hole layout for the range of cabinets with a depth of 1250 mm
Dimensions [mm]
S 600 750 950

Note:
The presented solutions are examples. Solutions for specific projects available after contacting the manufacturer.

Figure 6b - Example dimensions of the cubicle bases and floor holes for RELF 36 kV bays

Example dimensions of the cabinet bases and floor holes for RELF 36 kV bays

Note:
The presented solutions are examples. Solutions for specific projects available after contacting the manufacturer.

Figure 6c - Example dimensions of the cubicle bases and floor holes for RELF ex bays

Example dimensions of the cabinet bases and floor holes for RELF ex bays

 

Dimensions [mm]  
H
650
800
1000
G1
310 mm - for 2 cable / phase
560 mm - for 4 cable / phase

Note:
The presented solutions are examples. Solutions for specific projects available after contacting the manufacturer.

Figure 7a - RELF switchgear support frame

Version I
RELF switchgear load-bearing/installation frame

 

Dimensions [mm]
G
1180
1180
1180
S
600
750
950
S1
350
500
700
Version II
RELF switchgear load-bearing/installation frame

 

Dimensions [mm]
G
1500
1550
1563
1600
1650
S
650
800
650
800
1000
800
1000
1000
S1
400
500
400
500
700
500
700
700

Figure 7b - RELF ex switchgear support frame

RELF ex switchgear load-bearing/installation frame

 

Dimensions [mm]
S
400
550
750
G1
650
800
1000

Figure 8 - Mounting the switchgear on the floor

RELF 12 kV and 17.5 kV with a cabinet depth of 1250 mm

Mounting the switchgear on the floor RELF 12 kV and 17.5 kV with a cabinet depth of 1250 mm

RELF 12 kV i 17,5 kV / RELFex

Mounting the switchgear on the floor RELF 12 kV i 17,5 kV / RELFex

RELF 24 kV

Mounting the switchgear on the floor RELF 24 kV

RELF 36 kV

Mounting the switchgear on the floor RELF 36 kV

Data sheet examples

RELF (product range with a cabinet depth of 1250 mm) - marking sheets

RELF
1. Sheet 1.1 Incoming/outgoing feeder
2. Sheet 1.2 Feeder with switch disconnector
3. Sheet 1.3 Bus coupler bay with circuit breaker
4. Sheet 1.4 Bus coupler bay with sectionalizer
5. Sheet 1.5 Voltage metering bay

* The presented data sheets are only examples of solutions, which may change. In case of switchgears with technical parameters and bay configurations different than the ones presented, appropriate data sheets are available directly at the manufacturer or on the www.zpue.com website.

Sheet 1.1 - RELF - Incoming/outgoing feeder

Structural diagram

Structural diagram RELF - Incoming/outgoing bay

Front panel

Front panel RELF - Incoming/outgoing bay

Cross-section

Cabinet cross-section RELF - Incoming/outgoing bay

Parameters:
Rated voltage [kV] 12/17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Rated continuous current [A] 630-2500
Main busbars rated cotinuous current [A] 630-2500
Rated short-time withstand current [kA/3s] up to 31,5
Rated peak withstand current [kA] up to 80
Withstand for internal arcing fault [kA/1s] up to 31,5
Protection degree up to IP4X
Equipment:
Circuit breaker/contactor Q1 VB-4 (ZPUE), SION (Siemens); VD4/HD4 (ABB);
HVX (Schneider Electric); 3TM (Siemens); ConVac (ABB)
Current transformer T1 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment
(type/manufacturer)

Sheet 1.2 - RELF - Feeder with switch disconnector

Structural diagram

Structural diagram RELF - Feeder bay with switch disconnector

Front panel

Front view RELF - Feeder bay with switch disconnector

Cross-section

Cabinet cross-section RELF - Feeder bay with switch disconnector

Parameters:
Rated voltage [kV] 12/17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Rated continuous current [A] 400-1250
Main busbars rated cotinuous current [A] 630-2500
Rated short-time withstand current [kA/3s] up to 31,5
Rated peak withstand current [kA] up to 80
Withstand for internal arcing fault [kA/1s] up to 31,5
Protection degree up to IP4X
Equipment:
Circuit breaker Q2 NALF (ABB); OMB (ZWAE)
Earthing switch Q3 fast, with an impulse drive
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 1.3 - RELF - Bus coupler bay with circuit breaker

Structural diagram

Structural diagram RELF - Bus coupler bay with circuit breaker

Front panel

Front panel RELF - Bus coupler bay with circuit breaker

Cross-section

Cabinet cross-section RELF - Bus coupler bay with circuit breaker

Parameters:
Rated voltage [kV] 12/17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Rated continuous current [A] 630-2500
Main busbars rated cotinuous current [A] 630-2500
Rated short-time withstand current [kA/3s] up to 31,5
Rated peak withstand current [kA] up to 80
Withstand for internal arcing fault [kA/1s] up to 31,5
Protection degree up to IP4X
Equipment:  
Circuit breaker Q1 VB-4 (ZPUE); SION (Siemens); VD4/HD4 (ABB); HVX (Schneider Electric)
Current transformer T1 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 1.4 - RELF - Bus coupler bay with sectionalizer

Structural diagram

Structural diagram RELF - Bus coupler bay with short-circuiting device

Front panel

Front panel RELF - Bus coupler bay with short-circuiting device

Cross-section

Cabinet cross-section RELF - Bus coupler bay with short-circuiting device

Parameters:
Rated voltage [kV] 12/17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Rated continuous current [A] 630-2500
Main busbars rated cotinuous current [A] 630-2500
Rated short-time withstand current [kA/3s] up to 31,5
Rated peak withstand current [kA] up to 80
Withstand for internal arcing fault [kA/1s] up to 31,5
Protection degree up to IP4X
Equipment:
Sectionalizer Q4 made by ZPUE
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 1.5 - RELF - Voltage metering bay

Structural diagram

Structural diagram RELF - Voltage metering bay

Front panel

Front panel RELF - Voltage metering bay

Cross-section

Cabinet cross-section RELF - Voltage metering bay

Parameters:
Rated voltage [kV] 12/17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Main busbars rated cotinuous current [A] 630-2500
Rated short-time withstand current [kA/3s] up to 31,5
Rated peak withstand current [kA] up to 80
Withstand for internal arcing fault [kA/1s] up to 31,5
Protection degree up to IP4X
Equipment:
Withdrawable module Metering bay - withdrawable module with voltage transformers
Voltage transformer T2 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Notice:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

RELF - marking sheets

RELF
1. Sheet 2.1 Feeder with circuit breaker
2. Sheet 2.2 Feeder with switch disconnector
3. Sheet 2.3 Outgoing feeder with contactor
4. Sheet 2.4 Bus coupler bay with circuit breaker
5. Sheet 2.5 Bus coupler bay with sectionalizer
6. Sheet 2.6 Metering bay - withdrawable module with voltage transformers

* The presented data sheets are only examples of solutions, which may change. In case of switchgears with technical parameters and bay configurations different than the ones presented, appropriate data sheets are available directly at the manufacturer or on the www.zpue.com website.

Sheet 2.1 - RELF - Feeder with circuit breaker

Structural diagram

Structural diagram RELF - Feeder bay with circuit breaker

Front panel

Front panel RELF - Feeder bay with circuit breaker

Cross-section

Cubicle cross-section RELF - Feeder bay with circuit breaker

Parameters:
Rated voltage [kV] 12/17,5/24
Rated power-frequency withstand voltage [kV] 28/38/50
Rated lightning impulse withstand voltage [kV] 75/95/125
Rated frequency [Hz] 50
Rated continuous current [A] 630-4000
Main busbars rated cotinuous current [A] 630-4000
Rated short-time withstand current [kA/3s] up to 40
Rated peak withstand current [kA] up to 100
Withstand for internal arcing fault [kA/1s] up to 31,5 and up to 40/0,5s
Protection degree up to IP4X
Equipment:
Circuit breaker Q1 VB-4 (ZPUE); SION (Siemens); VD4/HD4 (ABB); HVX (Schneider Electric)
Current transformer T1 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 2.2 - RELF - Feeder with switch disconnector

Structural diagram

Structural diagram RELF - Feeder bay with switch disconnector

Front panel

Front panel RELF - Feeder bay with switch disconnector

Cross-section

Cubicle cross-section RELF - Feeder bay with switch disconnector

Parameters:
Rated voltage [kV] 12/17,5/24
Rated power-frequency withstand voltage [kV] 28/38/50
Rated lightning impulse withstand voltage [kV] 75/95/125
Rated frequency [Hz] 50
Rated continuous current [A] 400-1250
Main busbars rated cotinuous current [A] 630-4000
Rated short-time withstand current [kA/3s] up to 31,5
Rated peak withstand current [kA] up to 80
Withstand for internal arcing fault [kA/1s] up to 31,5
Protection degree up to IP4X
Equipment:
Circuit breaker Q2 NALF (ABB); OMB (ZWAE)
Earthing switch Q3 fast, with an impulse drive
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 2.3 - RELF - Outgoing feeder with contactor

Structural diagram

Structural diagram RELF - Outgoing feeder bay with contactor

Front panel

Front panel RELF - Outgoing feeder bay with contactor

Cross-section

Cabinet cross-section RELF - Outgoing feeder bay with contactor

Parameters:
Rated voltage [kV] 12
Rated power-frequency withstand voltage [kV] 28
Rated lightning impulse withstand voltage [kV] 75
Rated frequency [Hz] 50
Rated continuous current [A] 400-630
Main busbars rated cotinuous current [A] 630-4000
Rated short-time withstand current [kA/3s] up to 31,5
Rated peak withstand current [kA] up to 80
Withstand for internal arcing fault [kA/1s] up to 31,5
Protection degree up to IP4X
Equipment:
Contactor Q2 3TM (Siemens); ConVac (ABB)
Current transformer T1 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 2.4 - RELF - Bus coupler bay with circuit breaker

Structural diagram

Structural diagram RELF - Bus coupler bay - cabinet with circuit breaker

Front panel

Front panel RELF - Bus coupler bay - cabinet with circuit breaker

Cross-section

Cabinet cross-section RELF - Bus coupler bay - cabinet with circuit breaker

Parameters:
Rated voltage [kV] 12/17,5/24
Rated power-frequency withstand voltage [kV] 28/38/50
Rated lightning impulse withstand voltage [kV] 75/95/125
Rated frequency [Hz] 50
Rated continuous current [A] 630-4000
Main busbars rated cotinuous current [A] 630-4000
Rated short-time withstand current [kA/3s] up to 40
Rated peak withstand current [kA] up to 100
Withstand for internal arcing fault [kA/1s] up to 31,5 and up to 40/0,5s
Protection degree up to IP4X
Equipment:
Circuit breaker Q1 VB-4 (ZPUE); SION (Siemens); VD4/HD4 (ABB); HVX (Schneider Electric)
Current transformer T1 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 2.5 - RELF - Bus coupler bay with sectionalizer

Structural diagram

Structural diagram RELF - Bus coupler bay - cabinet with short-circuiting device

Front panel

Front panel RELF - Bus coupler bay - cabinet with short-circuiting device

Cross-section

Cabinet cross-section RELF - Bus coupler bay - cabinet with short-circuiting device

Parameters:
Rated voltage [kV] 12/17,5/24
Rated power-frequency withstand voltage [kV] 28/38/50
Rated lightning impulse withstand voltage [kV] 75/95/125
Rated frequency [Hz] 50
Rated continuous current [A] 630-4000
Main busbars rated cotinuous current [A] 630-4000
Rated short-time withstand current [kA/3s] up to 40
Rated peak withstand current [kA] up to 100
Withstand for internal arcing fault [kA/1s] up to 31,5 and up to 40/0,5s
Protection degree up to IP4X
Equipment:
Short-circuiting device Q4 made by ZPUE
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 2.6 - RELF - Metering bay - withdrawable module with voltage transformers

Structural diagram

Structural diagram RELF - Metering bay - withdrawable module with voltage transformers

Front panel

Front panel RELF - Metering bay - withdrawable module with voltage transformers

Cross-section

Cabinet cross-section RELF - Metering bay - withdrawable module with voltage transformers

Parameters:
Rated voltage [kV] 12/17,5/24
Rated power-frequency withstand voltage [kV] 28/38/50
Rated lightning impulse withstand voltage [kV] 75/95/125
Rated frequency [Hz] 50
Main busbars rated cotinuous current [A] 630-4000
Rated short-time withstand current [kA/3s] up to 40
Rated peak withstand current [kA] up to 100
Withstand for internal arcing fault [kA/1s] up to 31,5 and up to 40/0,5s
Protection degree up to IP4X
Equipment:
Withdrawable module Metering bay - withdrawable module with voltage transformers
Voltage transformer T2 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

RELF 36 kV - marking sheets

RELF 36 kV
1. Sheet 3.1 Feeder with circuit breaker
2. Sheet 3.2 Bus coupler bay with circuit breaker
3. Sheet 3.3 Bus coupler bay with short-circuiting device
4 Sheet 3.4 Metering bay - withdrawable module with voltage transformers

* The presented data sheets are only examples of solutions, which may change. In case of switchgears with technical parameters and bay configurations different than the ones presented, appropriate data sheets are available directly at the manufacturer or on the www.zpue.com website.

Sheet 3.1 - RELF 36 - Feeder with circuit breaker

Structural diagram

Structural diagram RELF 36 - Feeder bay with circuit breaker

Front panel

Front panel RELF 36 - Feeder bay with circuit breaker

Cross-section

Cabinet cross-section RELF 36 - Feeder bay with circuit breaker

Parameters:
Rated voltage [kV] 36/40,5*
Rated power-frequency withstand voltage [kV] 95/85,5(5min)/95(1min)*
Rated lightning impulse withstand voltage [kV] 190
Rated frequency [Hz] 50
Rated continuous current [A] up to 1600
Main busbars rated cotinuous current [A] up to 1600
Rated short-time withstand current [kA] up to 25(3s) and up to 31,5(1s)
Rated peak withstand current [kA] 63/80
Withstand for internal arcing fault [kA/1s] up to 25
Protection degree up to IP4X
Equipment:
Circuit breaker Q1 VD4 (ABB)
Current transformer T1 different manufacturers
Earthing switch Q3 EK6 (ABB)
Overvoltage limiter F1 GXE51 (ABB)
* - in accordance with GOST standards
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 3.2 - RELF 36 - Bus coupler bay with circuit breaker

Structural diagram

Structural diagram RELF 36 - Bus coupler bay - cabinet with circuit breaker

Front panel

Front panel RELF 36 - Bus coupler bay - cabinet with circuit breaker

Cross-section

Cabinet cross-section RELF 36 - Bus coupler bay - cabinet with circuit breaker

Parameters:
Rated voltage [kV] 36/40,5*
Rated power-frequency withstand voltage [kV] 95/85,5(5min)/95(1min)*
Rated lightning impulse withstand voltage [kV] 190
Rated frequency [Hz] 50
Rated continuous current [A] up to 1600
Main busbars rated cotinuous current [A] up to 1600
Rated short-time withstand current [kA] up to 25(3s) and up to 31,5(1s)
Rated peak withstand current [kA] 63/80
Withstand for internal arcing fault [kA/1s] up to 25
Protection degree up to IP4X
Equipment:
Circuit breaker Q1 VD4 (ABB)
Current transformer T1 different manufacturers
* - in accordance with GOST standards
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 3.3 - RELF 36 - Bus coupler bay with sectionalizer

Structural diagram

Structural diagram RELF 36 - Bus coupler bay - cabinet with short-circuiting device

Front panel

Front panel RELF 36 - Bus coupler bay - cabinet with short-circuiting device

Cross-section

Cabinet cross-section RELF 36 - Bus coupler bay - cabinet with short-circuiting device

Parameters:
Rated voltage [kV] 36/40,5*
Rated power-frequency withstand voltage [kV] 95/85,5(5min)/95(1min)*
Rated lightning impulse withstand voltage [kV] 190
Rated frequency [Hz] 50
Rated continuous current [A] up to 1600
Main busbars rated cotinuous current [A] up to 1600
Rated short-time withstand current [kA] up to 25(3s) and up to 31,5(1s)
Rated peak withstand current [kA] 63/80
Withstand for internal arcing fault [kA/1s] up to 25
Protection degree up to IP4X
Equipment:
Sectionalizer Q4 made by ABB
Earthing switch Q3 EK6 (ABB)
* - in accordance with GOST standards
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 3.4 - RELF 36 - Metering bay - withdrawable module with voltage transformers

Structural diagram

Structural diagram RELF 36 - Metering bay - withdrawable module with voltage transformers

Front panel

Front panel RELF 36 - Metering bay - withdrawable module with voltage transformers

Cross-section

Cabinet cross-section RELF 36 - Metering bay - withdrawable module with voltage transformers

Parameters:
Rated voltage [kV] 36/40,5*
Rated power-frequency withstand voltage [kV] 95/85,5(5min)/95(1min)*
Rated lightning impulse withstand voltage [kV] 190
Rated frequency [Hz] 50
Main busbars rated cotinuous current [A] up to 1600
Rated short-time withstand current [kA/3s] up to 25(3s) and up to 31,5(1s)
Rated peak withstand current [kA] 63/80
Withstand for internal arcing fault [kA/1s] up to 25
Protection degree up to IP4X
Equipment:
Withdrawable module Metering bay - withdrawable module with voltage transformers
Voltage transformer T2 different manufacturers
Earthing switch Q3 EK6 (ABB)
Overvoltage limiter F1 GXE51 (ABB)
* - in accordance with GOST standards
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

RELF ex - marking sheets

RELF ex
1. Sheet 4.1 Feeder with circuit breaker
2. Sheet 4.2 Feeder with switch disconnector
3. Sheet 4.3 Bus coupler bay with circuit breaker
4 Sheet 4.4 Bus coupler bay with sectionalizer
4 Sheet 4.5 Metering bay - withdrawable module with voltage transformers

* The presented data sheets are only examples of solutions, which may change. In case of switchgears with technical parameters and bay configurations different than the ones presented, appropriate data sheets are available directly at the manufacturer or on the www.zpue.com website.

Sheet 4.1 - RELF ex - Feeder with circuit breaker

Structural diagram

Structural diagram RELF ex - Feeder bay with circuit breaker

Front panel

Front panel RELF ex - Feeder bay with circuit breaker

Cross-section

Cabinet cross-section RELF ex - Feeder bay with circuit breaker

Parameters:
Rated voltage [kV] 12; 17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Rated continuous current [A] 630-2500
Main busbars rated cotinuous current [A] 630-2500
Rated short-time withstand current [kA/3s] up to 25
Rated peak withstand current [kA] up to 63
Withstand for internal arcing fault [kA/1s] up to 25
Protection degree up to IP4X
Equipment:
Circuit breaker Q1 VB-4 (ZPUE); VD4 (ABB); SION (Siemens); HVX (Schneider Electric)
Current transformer T1 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 4.2 - RELF ex - Feeder with switch disconnector

Structural diagram

Structural diagram RELF ex - Feeder bay with switch disconnector

Front panel

Front panel RELF ex - Feeder bay with switch disconnector

Cross-section

Cabinet cross-section RELF ex - Feeder bay with switch disconnector

Parameters:
Rated voltage [kV] 12; 17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Rated continuous current [A] 400-1250
Main busbars rated cotinuous current [A] 630-2500
Rated short-time withstand current [kA/3s] up to 25
Rated peak withstand current [kA] up to 63
Withstand for internal arcing fault [kA/1s] up to 25
Protection degree up to IP4X
Equipment:
Circuit breaker Q2 NALF (ABB); OMB (ZWAE)
Earthing switch Q3 fast, with an impulse drive
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 4.3 - RELF ex - Bus coupler bay with circuit breaker

Structural diagram

Structural diagram RELF ex - Bus coupler bay - cabinet with circuit breaker

Front panel

Front panel RELF ex - Bus coupler bay - cabinet with circuit breaker

Cross-section

Cabinet cross-section RELF ex - Bus coupler bay - cabinet with circuit breaker

Parameters:
Rated voltage [kV] 12; 17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Rated continuous current [A] 630-2500
Main busbars rated cotinuous current [A] 630-2500
Rated short-time withstand current [kA/3s] up to 25
Rated peak withstand current [kA] up to 63
Withstand for internal arcing fault [kA/1s] up to 25
Protection degree up to IP4X
Equipment:
Circuit breaker Q1 VB-4 (ZPUE); VD4 (ABB); SION (Siemens); HVX (Schneider Electric)
Current transformer T1 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 4.4 - RELF ex - Bus coupler bay with sectionalizer

Structural diagram

Structural diagram RELF ex - Bus coupler bay - cabinet with short-circuiting device

Front panel

Front panel RELF ex - Bus coupler bay - cabinet with short-circuiting device

Cross-section

Cabinet cross-section RELF ex - Bus coupler bay - cabinet with short-circuiting device

Parameters:
Rated voltage [kV] 12; 17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Rated continuous current [A] 630-2500
Main busbars rated cotinuous current [A] 630-2500
Rated short-time withstand current [kA/3s] up to 25
Rated peak withstand current [kA] up to 63
Withstand for internal arcing fault [kA/1s] up to 25
Protection degree up to IP4X
Equipment:
Sectionalizer Q4 Made by ZPUE
Current transformer T1 various manufacturers
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

Sheet 4.5 - RELF ex - Metering bay - withdrawable module with voltage transformers

Structural diagram

Structural diagram RELF ex - Metering bay - withdrawable module with voltage transformers

Front panel

Front panel RELF ex - Metering bay - withdrawable module with voltage transformers

Cross-section

Cabinet cross-section RELF ex - Metering bay - withdrawable module with voltage transformers

Parameters:
Rated voltage [kV] 12; 17,5
Rated power-frequency withstand voltage [kV] 28/38
Rated lightning impulse withstand voltage [kV] 75/95
Rated frequency [Hz] 50
Main busbars rated cotinuous current [A] up to 2400
Rated short-time withstand current [kA/3s] up to 25
Rated peak withstand current [kA] up to 63
Withstand for internal arcing fault [kA/1s] up to 25
Protection degree up to IP4X
Equipment:
Withdrawable module Metering bay - withdrawable module with voltage transformers
Voltage transformer T2 various manufacturers
Earthing switch Q3 US1 (ZPUE); EK6 (ABB)
Surge arresters F1 Polim (ABB) or other
Note:
We allow the possibility of arranging the bay configuration concerning its function and equipment (type/manufacturer)

MV switchgear (medium voltage)

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