V series indoor vacuum circuit breakers 12–38.5 kV, 630–2500 A
The V series are three-phase indoor vacuum circuit breakers for 12, 24, 36 and 38.5 kV with a current of 630–2500 A (brochure 747, a development of the 746 series). They are intended for medium-voltage switchgear, including front mounting on withdrawable trucks. All types are also produced in a single-pole version.
- Rated voltage
- 12, 24, 36, 38.5 kV
- Rated current
- 630–2000 A (2500 A at 24 and 36 kV)
- Breaking current
- 25–31.5 kA (12/24 kV); 20 kA, 31.5 kA at 2500 A (36/38.5 kV)
- Short-time withstand current
- up to 31.5 kA, 3 s
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The designation, for example V12-630-25 F-BK or V24-1250-25 KUF, reflects the voltage, current, breaking current and drive type. F-BK drives are spring-operated with manual operation for front mounting, BK-EA are spring-operated with manual closing and opening, and KUF are motorized spring drives suitable for auto-reclosing. The energy is stored by three coil springs with damping of the end positions and is sufficient for three operations, the last always being opening. Charging is done manually or by a motor (110/230 V AC, 24–220 V DC, about 211–286 W, 5.7–9.3 s). An overload interlock, an auxiliary switch, an operations counter, position and charge indicators and, optionally, a second release are provided. Releases are shunt, undervoltage and current-operated (ASA, RSA, WSA).
At 12/24 kV the circuit breakers are rated for 630–2000 A (2500 A at 24 kV), a breaking current of 25–31.5 kA, a thermal withstand of 25–31.5 kA / 3 s and a making capacity of 63–80 kA (the summary table gives 50–80 kA). At 36/38.5 kV the current is 630–1250 A (2500 A at 36 kV) and 20 kA (31.5 kA at 2500 A). Insulation levels are 75/28 kV (12 kV), 125/50 kV (24 kV), 170/70 kV (36 kV), 180/80 kV (38.5 kV).
Closing time is 46–53 ms, opening time 47–57 ms, arcing time less than 12–17 ms. The vacuum interrupter life at rated current is 30 000 operations (12/24 kV) and 10 000 (36/38.5 kV), at rated short-circuit current 100, and the mechanism withstands 10 000 operations. Classes M2 and S1. Contact wear is visible from the mark M without disassembly.
The vacuum interrupters are housed in thermoset cast parts, and the pole can be removed as a whole. Versions are enclosed (630–2000 A) and open (2500 A), weight 100–137 kg. Maintenance is minimal: inspection, cleaning of the insulation, lubrication of the mechanism. The circuit breakers are installed in W24, WEL/E3K and PRO-AIR H switchgear panels, for replacement and modernization of circuit breakers of previous series and for feeders with auto-reclosing.
Technical specifications
| Rated voltage | 12, 24, 36, 38.5 kV |
|---|---|
| Rated current | 630–2000 A (2500 A at 24 and 36 kV) |
| Breaking current | 25–31.5 kA (12/24 kV); 20 kA, 31.5 kA at 2500 A (36/38.5 kV) |
| Short-time withstand current | up to 31.5 kA, 3 s |
| Making capacity | 50–80 kA |
| Insulation | 28/75 (12), 50/125 (24), 70/170 (36), 80/180 kV (38.5) |
| Cycle | KUF: O-0.3 s-CO-15 s-CO; manual: O-3 min-CO |
| Life | 30 000 (12/24 kV) / 10 000 (36/38.5 kV) operations at In; 100 at Isc; mechanism 10 000 |
| Classes | M2, S1 |
| Standards | EN 62271-100, EN 62271-1 |
Request a price and lead time
V series indoor vacuum circuit breakers 12–38.5 kV, 630–2500 A. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What drive types do V series vacuum circuit breakers have?
F-BK spring-operated with manual operation for front mounting, BK-EA spring-operated with manual closing and opening, KUF motorized spring drive suitable for auto-reclosing. The spring energy is sufficient for three operations.
What is the vacuum interrupter life of V series circuit breakers?
30 000 operations at rated current at 12/24 kV and 10 000 at 36/38.5 kV, 100 operations at rated short-circuit current. The mechanism life is 10 000 operations.
What range of voltages and currents does the V series cover?
Voltages of 12, 24, 36 and 38.5 kV, rated currents of 630–2500 A. At 12/24 kV the breaking current is 25–31.5 kA, at 36/38.5 kV 20 kA.
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