RN-W

They have a wide range of applications in urban transformer stations, industrial sites, shopping centers and other facilities.

Technical description

rn wLow voltage RN-W type switchgears are designed to power LV devices. They have a wide range of applications in urban transformer stations, industrial sites, shopping centers and other facilities.

Characteristics and interlock system

Characteristics

  • Possible visual control of the condition of the cable connections without the need to open the door,
  • All cable connections are made at the bottom of the switchgear,
  • Small dimensions, compact design,
  • Possible to meter current in outgoing circuits,
  • Safe replacement of faulty switch disconnector without the need to de-energize the switchgear,
  • Possible to expand the unit when it is energized,
  • Connecting cables without crimping cable terminals,
  • Compatible with TN–S, TN–C, TN–C–S, TT, IT type low voltage networks,
  • Possibility to run the outgoing cables upwards,
  • Fuse slot powered by the connector is usually installed on the housing of the power supply module.

Interlock system

High safety level achieved thanks to:

  • an interlock, which allows the replacement of fuses only when they are de-energized after disconnecting the circuit, without the need to use special grips,
  • secure grounding of lower switch disconnector terminals () by applying the grounding devices,
  • a switchgear at full capacity can be quickly de-energized by the quick-break switch with a visible gap,
  • possibility to lock the switchgear in the open position, preventing its accidental energizing,
  • an interlock between the door and the primary switch disconnector (using INP-1250 switch disconnector) allows the door to be opened only when the switch disconnector is in the open position.

Certified by the Electrotechnical Institute.

Switchgear design

Switchgear design

The switchgear cubicle is made from a bent zinc aluminum sheet element, fixed with rivets, which ensures equipotential bonding.

The switchgear is configured from independent modules (power supply, outgoing, metering, etc.), which allows the easy expansion of existing units and designing of new ones.


Electrical equipment

  • In the power supply module the following devices can be applied:
    • INP-1250 or INP-1600 switch disconnector – standard solution,
    • Or other after consultation with the manufacturer,
    • MCCB 630÷1600 A circuit breakers.
  • In outgoing bays the following devices can be used:
    • ARS 00÷3 group manufactured by Apator S.A. – standard solution,
    • BTVC 00÷3 group manufactured by Pronutec – standard solution,
    • NSL-E3 or NSL 00÷3 group manufactured by EFEN – standard solution,
    • Or other after consultation with the manufacturer.
  • The switchgear can be additionally equipped with:
    • Current and voltage control metering,
    • Semi-indirect system of the power meter,
    • Area lighting module,
    • Reactive power compensator,
    • transformer no-load operation compensation capacitor.
  • Busbar connections are made from flat copper bars with a cross-section adjusted to rated currents,
  • In ARS, BTVC, NSL-E3, NSL type switch disconnectors, two 00 group switch disconnectors can be installed instead of one 1÷3 group switch disconnector, without the need to change the construction of the switchgear.

Basic technical data

Compliance with standards:
The RN-W type switchgear meets the requirements of the following standards:

  • PN-EN 61439-1 - “Low Voltage Switchgear and Control gear – Part 1: Common specifications”,
  • PN-EN 60439-5 - “Low Voltage Switchgear and Control gear - Part 5 : Assemblies for power distribution in public networks”,
  • PN-EN 60529 - „Degrees of protection provided by enclosures (IP code)”,
  • PN-EN 50102 - „Degrees of protection against mechanical damages provided by the enclosures of the electrical devices(IK code)”.
Electrical data
Rated voltage of the isolation 690 V
Rated connection voltage 400 V / 500 V
Rated test impulse withstand voltage 8 kV
Rated frequency 50 Hz
Rated current of the switchgear 1250 A / 1600 A / 2000 A 1)
Rated short-time withstand current do 25 kA (1s)
Rated peak current strength do 63 kA

1) - After prior consultation with the manufacturer.


Mechanical data
Dimensions Width depending on the configuration
Height from 1275 up to2075 mm
Depth 320 / 400 mm
IP degree of protection IP2X / IP4X
IK degree of protection up tp IK 10
Surface protection

Steel sheet construction – powder-painted or aluzinc
Powder painted or aluzinc steel sheet covers
Front panels made from plastic

Paint (powder technology): standard - RAL 7035 or another colour – on request
Plastic components Halogen-free, self-extinguishing, fire-resistant, do not contain CFC

Service conditions:
Ambient temperature
    - lower limit of the ambient temperature
    - upper limit of the ambient temperature
    - daily average ambient temperatures
ambient temperature
-5oC (-25oC)2)
+40oC
-5oC do 35oC
Relative humidity up to 50% (40oC)
Installation altitude up to 1000 m n.p.m.
Atmosphere in installation place Free from chemically aggressive dust, steam and gases

2) - Depending on applied apparatus.

On the customer’s request it is possible to design a switchgear adapted to other conditions.

Functional modules of the switchgear

functional modules of the switchgear

Switchgear is composed of independent elements (modules), which can be assembled in various sets. Basic modules of the RN-W switchgear are:

  • outgoing module (switch disconnector),
  • power supply module,
  • metering module,
  • other modules, eg. area lighting, installation apparatus, automation, etc.

Solutions of particular elements performance are shown in the tables.

Outgoing module (connecting)

czlon odplywowyIn the outgoing module between 5 and 12 fuse switch disconnectors of various manufacturers can be installed, from size 1 to 3 with transformers. Outgoing modules can be combined into sets.

Outgoing module
Module name Number of disconnectors. For  installation from size 1 to 3 (size 00) Dimensions [mm] [ width x height x depth] Comments
Standard design
CO-5 5 (10) 550 x 1275 x 400 (320) In ARS, BTVC and NSL switch disconnectors  it is possible to apply two switch disconnectors from the 00 group instead of one switch disconnector from the1÷3 group.
CO-10 10 (20) 1100 x 1275 x 400 (320)
Special construction
CO-6 6 (12) 700 x 1275 x 400 (320) In ARS, BTVC and NSL switch disconnectors  it is possible to apply two switch disconnectors from the 00 group instead of one switch disconnector from the1÷3 group.
CO-7 7 (14) 800 x 1275 x 400 (320)
CO-8 8 (16) 900 x 1275 x 400 (320)
CO-9 9 (18) 1000 x 1275 x 400 (320)
CO-12 12 (24) 1300 x 1275 x 400 (320)
CZO-1 9 (18) 1100 x 1275 x 400 (320) Power supply- the outgoing module is adapted to the installation of the switch disconnector NH – latr (?) 910 type and 1÷3 group switch disconnectors. More details are presented in Figure 1.
CZO-2 10 (20) 1650 x 1275 x 400 (320) Power supply- the outgoing module is adapted to the installation of the INP-1250switch disconnector and outgoing 1÷3 group switch disconnectors. More details are presented in Figure 2.
CO-...XX 0 XXX x 1275 x 400 (320) The outgoing module is adapted to the installation of 2 or 3 compact circuit breakers from 250 to 630 A. More details are presented in Figure 3. Module name and dimensions depend on the type and the number of installed switch disconnectors.

The size of the fuse links and cables applying cable connections. V-kleme type depending on the apparatus type:

Apparatus group Current ranges of the fuse links Maximum cable cross-section
GR. 00 6 ÷ 160 A Up to 95 mm2 (depending on the apparatus type)
GR. 1 6 ÷ 250 A 240 mm2 (300 mm2 – in case of the wire with sectoral cross-section)
GR. 2 63 ÷ 400 A
GR. 3 250 ÷ 630 A

Example of a special design:

Figure 1 - CZO-1 Power supply-outgoing module with NH– latr 910 switch disconnector
czo 1 01
czo 1 02
Figure 2 - CZO-1 Power supply-outgoing module with switch disconnector
czo 2 01
CZO-1 Power supply-outgoing module with switch disconnector

Additional equipment is marked in red

Figure 3 – CO-3 outgoing module with circuit breakers
co 3 01
co 3 02

Additional equipment is marked in red

Power supply compartment (power supply module)

czlon zasilajacy

In the power supply module, INP 1000- 1600 switch disconnector or other manufacturer’s switch disconnector (after consultation) or compact circuit breaker with rated current (630 – 1600 A)can be installed. The circuit breaker or switch disconnector can be equipped with an engine drive. It is also possible to install ammeters, voltmeters or a network analyser.

Power supply module
Module name Installed apparatus Dimensions [mm] [ width x height x depth] Comments
Standard design
CZ-1 INP 1250 switch disconnector or other 550 x 675 x 400 (320) Possible to install current transformers, ammeters, voltmeter and transformers for semi-indirect power metering
Special construction
CZ-4 Compact circuit breaker 630 – 1600 A 550 x 675 x 400 (320) Drive on the door, current transformers cannot be installed
CZ-5 Compact circuit breaker 630 – 1600 A *) 550 x 800 x 400 (320) As for standard design
CZ-6 INP 1250 switch disconnector or other *) 1100 x 1275 x 400 (320) As for standard design, interlocks for auxiliary installation circuits can be additionally installed. More details are presented in Figure 4.
CZ-9 Compact circuit breaker
630-1600 A *)
550 x 1275 x 400 (320) As above. More details are presented in Figure 5.

*) - the apparatus applied in the switchgear can be equipped with an engine drive after prior consultation with the manufacturer


Example of a special design:

Figure 4 – CZ-6 power supply-outgoing module with switch disconnector
cz 6 01
CZ-6 power supply-outgoing module with switch disconnector

Additional equipment is marked in red

Figure 5 – CZ-9 power supply-outgoing module with compact circuit breaker
cz 9 01
CZ-9 power supply-outgoing module with compact circuit breaker

Additional equipment is marked in red

Metering compartment (metering module)

czlon pomiarowy

The metering module is used to install a power settlement meter, designed as a board  making it possible to install one to four meters. The metering system is also equipped with a metering bar, e.g. SKA, and voltage circuits protection.

Outgoing module
Module name Installed apparatus Dimensions [mm] [ width x height x depth] Comments
Standard design
TP-1 1 or 2 electricity meters 550 x 675 x 400 (320) More details are presented in Figure 6.
Special construction
TP-2 3 electricity meters 750 x 675 x 400 (320) More details are presented in Figure 7.
TP-3 3 or 4 electricity meters 1100 x 675 x 400 (320) More details are presented in Figure 8.

Example of a special design:

Figure 6 – metering board TP – 1
tp 1 01
tp 1 02
Figure 7 – metering board TP – 2
tp 2 01
tp 2 02
Figure 8 – metering board TP – 3
tp 3 01
tp 3 02

Other compartments and additional elements

In the RN-W type switchgear, other modules in cubicles with standard dimensions can be installed, such as:

  • area lighting module,
  • installation outgoing module,
  • automation module,
  • SZR system module,
  • Other
Outgoing module
Module name Equipment Dimensions [mm]
[width x height x depth]
Comments
Standard design
TO Area lighting module 550 x 1275 x 400 (320) Installed apparatus. More details are presented in Figure 9.
Special construction
TI-1 Circuit breaker or installation switch disconnector 550 x 675 x 400 (320) Two rows of modular apparatus. Each row can be equipped with 22 units with a width of 18 mm.
TI-2 Circuit breaker or installation switch disconnector 550 x 1275 x 400 (320) Four rows of modular apparatus. Each row can be equipped with 22 units with a width of 18 mm.
TA-1
TA-2
Automation system 550 x 675 x 400 (320)
550 x 1275 x 400 (320)
The manner of how the system should be made must be consulted with the manufacturer.
TSZR Automatic system of power supply switching 550 x 1275 x 400 (320) The manner of how the system should be made must be consulted with the manufacturer.
TX Other systems 550 x 675 x 400 (320)
550 x 1275 x 400 (320)
To be agreed with the manufacturer
Figure 9 – area lighting module TO
to 01
to 02

Additional equipment for rn-w type switchgear RN-W

oslona mostu szynowego
Cover for leading the busbar power supply out of the switchgear. Provides IP4 degree of protection and protects handlers against touching energized elements.

rama kablowa
A frame which allows conducting cables in the rooms without the use of cable trays. Height of cable frame “a” depends on the bending radius of the cables.


RN-W type switchgears are designed for internal installation. They can be fixed directly to the concrete floor of the facility. Regardless of the ground type, switchgears must be placed horizontally (maximum deviation in surface profile shall be 2mm over a 1 m gauge length). The switchgear should be fixed to the ground with four M8 bolts as shown in Figure 11.  The power supply is provided at the top of the switchgear on busbars.

NOTICE: Busbar and switchgear connections must be protected from direct contact (using original cover or one made by the installer), minimum IP20 protection degree.

Phase cables are connected directly with apparatus terminals. Assembly height is shown in Picture 12.

The apparatus is designed to connect cables up to 95 mm2 for 00 group apparatus (depending on its type) and to connect cables with a cross-section up to 240 mm2 (300 mm2 connector with sectoral cross-section) for 1-3 group apparatus.

Figure 11 – openings arrangement in the floor for RN-W type switchgear installation
rysunek 11
Figure 12 – height of the cable terminals
rysunek 12

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