Vb4-11kv/630A-25ka Vcb Draw-out Type Indoor Vacuum Circuit Breaker

VB4 Indoor Vacuum Circuit BreakerDescriptionVB4 series medium voltage vacuum circuit-breakers with lateral operating mechanism feature the separate pole construction technique. VS1 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 VB4, 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. AdvantagesVacuum 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. VS1 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 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 protectionMain characteristics1) Test voltage according DIN VDE 0670, part 1000, list 22) 4000 A with forced cooling3) 3150 A with 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 SerialNumberItemUnitData  31.5kA40kA50kA1Rated voltageKv12/17.5/24kV2Maximum working voltageKv123Rated currentA1250 16002000 25001250 16002500 31501250 2500 31504Rated short-circuit break currentKA31.540505Rated short-circuit close current (peak value)KA801001256Rated withstand current (peak value)KA8010012574S Rated little withstand currentKA31.540508Rated insulation levelIndustrial frequencyWithstand voltageKA42/50/60Thunder impulseWithstand voltage75/95/1259Rated operation order  Off-0.3S on and off-180S-on and off10Mechanical lifeTimes1000011Rated short-circuit current break and close timeTimes5012Speak and move organization amountAssign the curre t of the floodgate(DC)  V11022013Speak and move organization amountEqual to the curre t of the floodgate(DC)  V11022014Switching distance of the contactmm>1115Ultra journey(touches the headSpringand compress length)mm4+/-0.516Three-phase breaking into shutFloodgate sex of the same periodMs