Rockwill Electric Group
Indoor fixed lateral type vacuum circuit breaker
General VD4 series circuit-breakers are devices under vacuum for indoor installation. ...

Detailed description

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  • Main technical data
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  • RWS10

General

VD4 series circuit-breakers are devices under vacuum for indoor installation. Please contact ROCKWILL for special installation requirements. VD4-R series medium voltage vacuum circuit breakers with lateral operating mechanism for indoor installation feature the separate pole construction technique. Each pole houses a vacuum interrupter which is encased in the resin when the cylinder is moulded thanks to a special manufacturing process. This construction method protects the vacuum interrupter from shock, pollution and condensation.

The operating mechanism is the trip-free stored energy type with independent opening and closing regardless of the operator's action.The operating mechanism is widely used in all VD4-R series circuit-breakers with frontal control.

The circuit-breaker can be remote controlled when fitted with dedicated electrical accessories (gearmotor, opening and closing release).

The operating mechanism, the three poles and the current sensors (if provided) are installed on a metal frame without wheels. The construction is particularly compact, sturdy and of limited weight.

VD4-R series circuit-breakers with lateral operating mechanisms are life-long sealed pressure devices.(Standards IEC 62271-100)

Vacuum Circuit-breaker   VD4/R 12 VD4/R 17 VD4/R 24
Standards  
Rated voltage Ur(kV) 12 17.5 24
Rated insulation voltage Us(kV) 12 17.5 24
Withstand voltage at 50Hz<1min> Ud(kV) 28 38 50
Impulse withstand voltage Up(kV) 75 95 125
Rated frequency fr(Hz) 50-60 50-60 50-60
Rated thermal current<40℃> Ir(A) 630 800 1250 630 800 1250 630 800 1250
Rated duty breaking capacity(symmetrical rated short-circuit current) Isc(kA) 12.5 - - 12.5 - - 12.5 - -
16 16 16 16 16 16 16 16 16
20 20 20 20 20 20 20 20 20
25 25 25 25 25 25 - - -
Short-time withstand current(3s) Ik(kA) 12.5 - - 12.5 - - 12.5 - -
16 16 16 16 16 16 16 16 16
20 20 20 20 20 20 20 20 20
25 25 25 25 25 25 - - -
Making capacity Ip(kA) 31.5 - - 31.5 - - 31.5 - -
40 40 40 40 40 40 40 40 40
50 50 50 50 50 50 50 50 50
63 63 63 63 63 63 - - -
Making capacity  
Opening time (ms) 40…60 40…60 40…60
Arcing time (ms) 10…15 10…15 10…15
Total break-time (ms) 50…75 50…75 50…75
Closing time (ms) 30…60 30…60 30…60

rockwill vacuum circuit breaker

●Code ●Available versions
1.Closing pushbutton VD4 circuit-breakers with lateral operating mechanism are available in the following versions:
2.open/closed indicator
3.Discharged Center-distance P =( )mm Fixed Removable
4.Operation counter 210 210
5.Manually charging handle 230 230
6.Opening pushbutton 250 250
7.Protection relay 275 275
8.Delivery terminal box 300 300
9.Current transformer 310 310
10.Polo      

The RWS10 Overcurrent and Earth Fault relay is developed by using the latest generation of hardware technology and is available in multiple variants depending on power supply, binary input/output configuration and data communication facility.
The RWS10 Overcurrent and Earth Fault relay is housed in a 4U high, size 4 non draw-out case and these relays provide protection, monitoring, instrumentation, and metering with integrated input and output logic, data logging and fault reports.
Communication access to the relay functionality is via a front USB port for local PC connection or rear electrical RS485 port for remote connection

Password Protection – 2 levels(System Config→Setting Password and Control Password, default password are “AAAA”).50Hz/60Hz systems are optional, so that the use scope of device is extended (System Config→Setting Frequency).Protection configuration is complete, and all protection functions can be switched on and off flexibly. At the same time,all protection and supervision functions can be set dependencies or independencies (System Config→Settingdependencies). If you set the independence, the relevant parameters will be displayed as the function switch on.
6-ways intellectual switching value input and 6-ways intellectual switching value output.
Large capacity flash memory can record at least 100 times of historical events, and no data will loss even the power is off.
Circuits operating loop can be used both the direct or alternating current, self-adaptation open/close brake function,which can co-work with various of breakers, and the operation is simple and reliable.
The device has complete self-inspection function to in-service monitor the working conditions of various parts of the device, ensuring the reliability of the device.

vacuum circuit breaker diagram

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