Wenzhou Rockwell Transformer Co., Ltd.  

Product Name: Indoor High Voltage Vacuum Circuit Breaker with Embedded Poles Model NO.: VD4 Certification: ISO9001-2000 Function: Overcurrent Protection Type: Circuit Breaker Poles Number: 3 Structure: Vcb Installation: Fixed/Drawable Arc-extinguishing Medium: Vacuum Speed: Normal Type Circuit Breaker Operation: Electric Type Breaking Capacity: High Voltage Circuit Breakers Trademark: Rockwill Transport Package: Carton Specification: IEC, GB Origin: China HS Code: 8535210000 Product Description Product DescriptionVd4 Indoor Vacuum Circuit BreakerDescriptionVD4 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 along life expectancy. There is no adverse effect on the vacuum, even from frequent switching of operating and short-circuit currents.AdvantagesVacuum circuit-breakers have particular advantages for use in networks where there is ahigh switching frequency in the working current range and/ or where acertain 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 alow 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 applicationBelow 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 protectionDiagrammatic sketchCircuit-breaker operating mechanismA) Open/closed auxiliary contactsB) Geared motor for closing spring chargingC) Built-in closing spring charging leverD) Mechanical signalling device for circuit-breaker open/closedE) Mechanical operation counterF) Plug-socket connectors of electrical accessories in the truckG) Signalling device for closing springs charged/dischargedH) Service releasesI) Closing pushbuttonL) Opening pushbuttonM) Operating mechanism locking electromagnetN) Additional shunt opening releaseO) Transient contactP) Contacts for signalling spring charged/dischargedMain characteristicsRated 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)mmpHabc150-275205-310450-700424461-5996)210-275310570-7004245996)210-275310600-7504596088)275310750459677210-275310570-700424631-661280/3605)3288957)/1000555/6867)1575280/3605)3288957)/1000555/6867)1575Weightkg73-10594-180147-260265100-110290-365290-365Embedded Pole••••••Assembled Pole•••1) Test voltage according DIN VDE 0670, part 1000, list 22) 4000 Awith forced cooling3) 3150 Awith forced cooling in AP technology4) Higher values on request5) 360 mm for fixed, 280 mm for withdrawable Version6) Circuit-breaker with heat sink 616 mm7) Withdrawable Version8) Circuit-breaker with heat sink 634 mm