Rotoblok VCB

Unique performance switchgear type Rotoblok VCB connecting a vacuum circuit breaker, disconnecting and earthing switch in one device, small size fields, the ability to adapt to work with master control systems.

General description

Rotoblok VCB

Modern, indoor, medium voltage Rotoblok VCB type switchgear cubicles. They are designed for the distribution of three-phase electricity with 50 Hz rated frequency, and rated voltage up to 25 kV in industrial distribution networks. The modular bay design of the Rotoblok VCB switchgear allows for any configuration and combination with the Rotoblok and Rotoblok SF switchgears bay range.

Characteristics and advantages

The Rotoblok VCB type switchgear cubicle is an indoor, two-compartment switchgear, in a galvanized steel sheet housing with a single primary busbar system. The switchgear is characterized by air insulation (AIS – Air Insulated Switchgear) and relatively small dimensions obtained by using a three-function medium voltage insulation switch replacing the three apparatus previously used (i.e.: circuit breaker, disconnector and grounding switch). To extinguish the internal arcing, vacuum interrupters in resin insulators are installed on the rotating shaft, which also performs the function of a disconnector. The mechanical interlock system prevents incorrect switching procedures and the distribution bay door opening before switching off the voltage and closing the grounding switch. The special design and materials used in production provide long life, reliability, but above all, excellent safety.

Pola rozdzielnicy posiadają następujące właściwości:

  • application of modern TGI type device (ZPUE production), which serves three functions: that of a circuit breaker, a switch disconnector and a grounding switch,
  • miniature bay dimensions as well as cubicle dimensions, maintainging high function and technical parameters (minimum required width of the Rotoblok VCB switchgear is 500mm),
  • interlock system is limited to one apparatus,
  • apparatus can be controlled both locally and remotely (for example, by radio signal),
  • high operational safety is possible through prevention of incorrect switching operations,
  • two visible, full air isolation spaces, which guarantee the highest level of safety,
  • apparatus in open and closed position is in itself a mechanical and isolating partition between the primary busbar compartment and the cable connection,
  • improving reliability by eliminating many mechanical and electrical interlocks,
  • simple and reliable construction through elimination of many busbar links,
  • long operation without the need for service and maintenance operations,
  • during service operations, the main apparatus shaft (circuit breaker + switch disconnector) can be changed quickly and simply,
  • high corrosion resistance: the switchgear cubicle structure is made from zinc-aluminium alloy coated sheeting,
  • universality in designing different switchgear configurations with any number of bays,
  • adapted for the installation of advanced protection and control apparatus from various manufacturers,
  • the possibility to mount the switchgear cubicle on the wall helps to save space in the distribution room, which is important during the modernization and expansion of existing switchgears,
  • quick and easy access to monitor and maintenance the switchgear units,
  • simple operation.

Basic technical data

Compliance with standards:
The Rotoblok VCB type switchgear complies with the standards of:

  • PN-EN62271-1 - “High Voltage Switchgear and Controlgear – Part 1: Common specifications”,
  • PN-EN 62271-100 - “High Voltage Switchgear and Controlgear – Part 200: Altering current metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV”,
  • PN-EN 62271-200 - “High Voltage Switchgear and Controlgear – Part 100: Alternating current circuit breakers”,

The switchgear cubicle is certified by the Electrotechnical Institute.

Technical data
  Rotoblok VCB
Nominal grid voltage 20 kV
Highest apparatus voltage 25 kV
Rated frequency / number of phases 50 Hz / 3
Rated short-time power frequency withstand voltage 50 kV / 60 kV
Rated lightning impulse withstand voltage 1,2/50 µs 125 kV / 145 kV
Rated continuous current 630 A / 1250 A
Rated short-time withstand current up to 16 kA (3 s) / up to 20 kA (1 s)
Rated peak current strength up to 50 kA
Internal arcing class AFLR up to 16 kA (1s)
Degree of protection up to IP4X
Service conditions:
Ambient temperature  
- short-time maximum
+ 40°C
- maximum daily average
+ 35°C
- maximum yearly average
+ 20°C
- lowest prolonged
+ 25°C1)
Relative humidity  
- maximum daily average
95%
- maximum monthy average
90%
- maximum daily average of vapour pressure
2,2 kPa
- maximum monthly average of vapour pressure
1,8 kPa
Atmosphere in installation location no significant salt, steam, dust, smoke,
flammable or corrosive gases pollution,
and no icing, frost and dew
Installation altitude up to 1000 meters above sea level2)
Vibrations vibrations caused by external causes
or earthquakes are not taken into account

Notice:
*1) Unless the control-metering and protection unit manufacturer has stated otherwise.
*2) If the mounting altitude of the switchgear cubicle is higher than 1000 meters above sea level, the level of the switchgear insulation should be adjusted using an indicator compliant to 2.2.1 paragraph regulations of the PN-EN 62271-1 standard.

Switch view

Switch view

Rotoblok VCB widok łącznika

View of the main insulation shaft and vacuum circuit breaker

Rotoblok VCB widok wału

1 - Insulation main shaft with circuit breaker
2 - Manual drive
3 - Vacuum breaker
4 - Resin insulators
5 - Lower grounding switch
6 - Galvanized steel frame
7 - Switch ON
8 - Switch OFF
9 - Disconnector socket

10 - Grounding switch socket and signalization
11 - Spring arming socket of the circuit breaker
12 - Signaling of spring arming
13 - Connections for secondary wires
14 - Signaling for circuit breaker position
15 - Signaling for disconnector position

Position of switch work

Turn on position - closed

Rotoblok VCB - Pozycje pracy aparatu - Pozycja załączony-zamknięty

Turn off position– closed

Rotoblok VCB - Pozycje pracy aparatu - Pozycja wyłączony-zamknięty

Turn off position – open

Rotoblok VCB - Pozycje pracy aparatu - Pozycja wyłączony-otwarty

Grounded postion

Rotoblok VCB - Pozycje pracy aparatu - Pozycja uziemiony

Rotoblok VCB switchgear bay variants

VCB 1

Electrical diagram

Schemat elektryczny rozdzielnicy Rotoblok VCB - pole VCB 1

Front view

Widok z frontu rozdzielnicy Rotoblok VCB - pole VCB 1

Notice:
These pictures present exemplary bay equipment. It is possible to configure the bays to the customer’s needs. In such cases, please contact the manufacturer to request pictures.
The optional accessories are marked in red.

  1. Using 24 kV supportive current transformers instead of bushing transformers.
  2. Using a fuse base above the voltage transformers.
  3. Using voltage transformers.
  4. A TGI 24 apparatus with current transformers can be located on the right side of the bay.
  5. When the Rotoblok VCB bays are connected with Rotoblok 17,5 kV and Rotoblok SF bays, the height of the switchgear bay is 1950mm, and the depth is 950 mm. When the Rotoblok VCB bays are connected with Rotoblok 24 bays, the height of the switchgear bay is 1950 mm, and depth 1150 mm.

VCB 2(31))

Electrical diagram

Schemat elektryczny rozdzielnicy Rotoblok VCB - pole VCB 2

Front view

Widok z frontu rozdzielnicy Rotoblok VCB - pole VCB 2

Notice:
These pictures present exemplary bay equipment. It is possible to configure the bays to the customer’s needs. In such cases, please contact the manufacturer to request pictures.
The optional accessories are marked in red.

  1. Using 24 kV supportive current transformers instead of bushing transformers.
  2. Using a fuse base above the voltage transformers.
  3. Using voltage transformers.
  4. A TGI 24 apparatus with current transformers can be located on the right side of the bay.
  5. When the Rotoblok VCB bays are connected with Rotoblok 17,5 kV and Rotoblok SF bays, the height of the switchgear bay is 1950mm, and the depth is 950 mm. When the Rotoblok VCB bays are connected with Rotoblok 24 bays, the height of the switchgear bay is 1950 mm, and depth 1150 mm.

VCB 5(6*2))

Electrical diagram

Schemat elektryczny rozdzielnicy Rotoblok VCB - pole VCB 5

Front view

Widok z frontu rozdzielnicy Rotoblok VCB - pole VCB 5

Notice:
These pictures present exemplary bay equipment. It is possible to configure the bays to the customer’s needs. In such cases, please contact the manufacturer to request pictures.
The optional accessories are marked in red.

  1. Using 24 kV supportive current transformers instead of bushing transformers.
  2. Using a fuse base above the voltage transformers.
  3. Using voltage transformers.
  4. A TGI 24 apparatus with current transformers can be located on the right side of the bay.
  5. When the Rotoblok VCB bays are connected with Rotoblok 17,5 kV and Rotoblok SF bays, the height of the switchgear bay is 1950mm, and the depth is 950 mm. When the Rotoblok VCB bays are connected with Rotoblok 24 bays, the height of the switchgear bay is 1950 mm, and depth 1150 mm.

VCB O5

Electrical diagram

Schemat elektryczny rozdzielnicy Rotoblok VCB - pole VCB 05

Front view

Widok z frontu rozdzielnicy Rotoblok VCB - pole VCB 05

Notice:
These pictures present exemplary bay equipment. It is possible to configure the bays to the customer’s needs. In such cases, please contact the manufacturer to request pictures.
The optional accessories are marked in red.

  1. Using 24 kV supportive current transformers instead of bushing transformers.
  2. Using a fuse base above the voltage transformers.
  3. Using voltage transformers.
  4. A TGI 24 apparatus with current transformers can be located on the right side of the bay.
  5. When the Rotoblok VCB bays are connected with Rotoblok 17,5 kV and Rotoblok SF bays, the height of the switchgear bay is 1950mm, and the depth is 950 mm. When the Rotoblok VCB bays are connected with Rotoblok 24 bays, the height of the switchgear bay is 1950 mm, and depth 1150 mm.

VCB S1L(P4))

Electrical diagram

Schemat elektryczny rozdzielnicy Rotoblok VCB - pole S1L

Front view

Widok z frontu rozdzielnicy Rotoblok VCB - pole S1L

Notice:
These pictures present exemplary bay equipment. It is possible to configure the bays to the customer’s needs. In such cases, please contact the manufacturer to request pictures.
The optional accessories are marked in red.

  1. Using 24 kV supportive current transformers instead of bushing transformers.
  2. Using a fuse base above the voltage transformers.
  3. Using voltage transformers.
  4. A TGI 24 apparatus with current transformers can be located on the right side of the bay.
  5. When the Rotoblok VCB bays are connected with Rotoblok 17,5 kV and Rotoblok SF bays, the height of the switchgear bay is 1950mm, and the depth is 950 mm. When the Rotoblok VCB bays are connected with Rotoblok 24 bays, the height of the switchgear bay is 1950 mm, and depth 1150 mm.

VCB S3L(P4))

Electrical diagram

Schemat elektryczny rozdzielnicy Rotoblok VCB - pole S3L

Front view

Widok z frontu rozdzielnicy Rotoblok VCB - pole S3L

Notice:
These pictures present exemplary bay equipment. It is possible to configure the bays to the customer’s needs. In such cases, please contact the manufacturer to request pictures.
The optional accessories are marked in red.

  1. Using 24 kV supportive current transformers instead of bushing transformers.
  2. Using a fuse base above the voltage transformers.
  3. Using voltage transformers.
  4. A TGI 24 apparatus with current transformers can be located on the right side of the bay.
  5. When the Rotoblok VCB bays are connected with Rotoblok 17,5 kV and Rotoblok SF bays, the height of the switchgear bay is 1950mm, and the depth is 950 mm. When the Rotoblok VCB bays are connected with Rotoblok 24 bays, the height of the switchgear bay is 1950 mm, and depth 1150 mm.

Examples of the switchgear Rotoblok VCB in combination with the Rotoblok switchgear and Rotoblok SF

Electrical diagram

Przykłady rozdzielnicy Rotoblok VCB - Schemat elektryczny

Front view

Przykłady rozdzielnicy Rotoblok VCB - Widok z frontu

Electrical diagram

Przykłady rozdzielnicy Rotoblok VCB - Schemat elektryczny

Front view

Przykłady rozdzielnicy Rotoblok VCB - Widok z frontu

ZPUE's website uses cookies. By staying here you are agreeing to our use of cookies. learn more