The load-breaker is manufactured in accordance with TU U 27.1-37611511-001:2021, DSTU EN 62271-103.
The load-breakers are designed to switch on and off sections of the AC three-phase circuit with an industrial frequency of 50 Hz and a rated voltage of up to 10 kV under load, as well as to ground the disconnected sections using grounding devices.
| Nominal voltage, kV | 10 |
| Maximum operating voltage, kV | 12 |
| Nominal current, A | 630 |
| Nominal disconnecting current at cos φ = 0.7, A | 630 |
| Nominal electrodynamic withstand current, kA | 50 |
| Mechanical endurance, cycles of “closing – any pause – opening” | 2000 |
| Initial effective value of the periodic component of the closing current, kA | 20 |
| Maximum closing current peak, kA | 41 |
| Switching endurance, cycles of “closing – any pause – opening”:
– at a nominal current of 630 A – at a nominal current of 400 A – at a nominal current of 300 A * Without replacing arc quenching chambers. |
30* 30* 100*
|
| Inherent closing time, s, not exceeding | 0.15 |
| Dielectric strength, test voltage
at industrial frequency, RMS value, kV |
42 |
| Pulse voltage, amplitude of the total impulse, kV | 75 |
| Weight, kg | 32 |
| Article no. | Name | Performance | |
|---|---|---|---|
| 1201001 | Circuit breaker VNA-10/630-20 U3 | load switches without earthing switches | Order |
| 1201002 | Circuit breaker VNA-10/630-20-z U3 | switches with earthing switch on one side | Order |
| 1201003 | Circuit breaker VNA-10/630-20-2z U3 | switches with earthing switch on both sides | Order |
| 1201004 | Circuit breaker VNАр-10/630-20-z U3 | switches with fuses | Order |
| 1201005 | Circuit breaker VNАр-Р-10/630-20-z U3 | switches with fuses on a common frame | Order |
| 1201006 | Circuit breaker VNАр-Р-EM-10/630-20-z U3 | switches with electromagnetic trip | Order |
