The China VD4 series vacuum circuit-breakers are devices for indoor switchgear 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|
|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 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||-||-|
|Short-time withstand current(3s)||Ik(kA)||12.5||-||-||12.5||-||-||12.5||-||-|
|1.Closing pushbutton||VD4 circuit-breakers with lateral operating mechanism are available in the following versions:|
|3.Discharged||Center-distance P =( )mm||Fixed||Removable|
|5.Manually charging handle||230||230|
|8.Delivery terminal box||300||300|
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.