China Rockwill-36kv Vacuum Circuit Breaker for Indoor Type with Handcart

Product Description
Vd4 Indoor Vacuum Circuit Breaker
Description
VD4 series medium voltage vacuum circuit-breakers with lateral operating mechanism feature the separate pole construction technique.
VD4 vacuum circuit breakers have been designed for indoor use and air insulated switchboards.
Their switching capacity is sufficient to handle any conditions arising from switching of equipment and system components under normal operating and fault conditions, particularly short-circuits, within the parameters of their technical data. The vacuum circuit-breakers of type iVD4, designed in column form, can be supplied both as individual units for fixed installation and mounted on chassis. Vacuum circuit-breakers are characterized by their simple and robust construction. They have a long life expectancy. There is no adverse effect on the vacuum, even from frequent switching of operating and short-circuit currents.

Advantages
Vacuum circuit-breakers have particular advantages for use in networks where there is a high switching frequency in the working current range and/ or where a certain number of short- circuit breaking operations are expected. iVD4 vacuum circuit- breakers are suitable for auto reclosing and have exceptionally high operating reliability and long life. The circuit- breakers are notable for their compact design, small dimensions together with high capacity. The operating mechanisms have a low maintenance requirement and the interrupters are maintenance- free throughout their service lives. They are well suited to all load breaking operations which occur in practice, and in particular:Short-circuit currents;Overhead lines under load and, no-load conditions;Cables under load and no-load conditions;Transformers under load and no-load conditions;Generators under load and no-load conditions;Ripple control system;Capacitor banks(also parallel switching) and Motors with starting currents above 600A;
Fields of application
Below is the list of SM6 range units used in MV/LV transformer substations and industrial distribution substations:Cable control and protectionOverhead control and protectionTransformers and distribution substationsMotor and transformer control and protectionGenerator control and protectionCapacitor bank control and protection
Diagrammatic sketch
Circuit-breaker operating mechanism

A) Open/closed auxiliary contacts
B) Geared motor for closing spring charging
C) Built-in closing spring charging lever
D) Mechanical signalling device for circuit-breaker open/closed
E) Mechanical operation counter
F) Plug-socket connectors of electrical accessories in the truck
G) Signalling device for closing springs charged/dischargedH) Service releases
I) Closing pushbutton
L) Opening pushbutton
M) Operating mechanism locking electromagnet
N) Additional shunt opening release
O) Transient contact
P) Contacts for signalling spring charged/discharged

Main characteristics

Rated voltage1)kV12243640.5Rated frequencyHz50 -6050 - 6050 - 6050 - 60Rated normal currentA630...40002)630.25630...31503)630...31503)Rated short-circuit breaking current (symm.)kA16.31.540506316.31.516.416.4Rated short-circuit making currentkA40.81001254)15840.840.140.1Rated duration of short-circuit4)s3333334Fixed- / withdrawable Version • / •• / •• / •• / •• / •• / •• / •Max. overall dimensions
(fixed Version)mm
p
H
a
b
c150-275
205-310
450-700
424
461-5996)210-275
310
570-700
424
5996)210-275
310
600-750
459
6088)275
310
750
459
677210-275
310
570-700
424
631-661280/3605)
328
8957)/1000
555/6867)
1575280/3605)
328
8957)/1000
555/6867)
1575Weightkg73-10594-180147-260265100-110290-365290-365Embedded Pole ••• •••Assembled Pole • ••

1) Test voltage according DIN VDE 0670, part 1000, list 2
2) 4000 A with forced cooling
3) 3150 A with forced cooling in AP technology
4) Higher values on request
5) 360 mm for fixed, 280 mm for withdrawable Version
6) Circuit-breaker with heat sink 616 mm
7) Withdrawable Version
8) Circuit-breaker with heat sink 634 mm