ZN63(VS1)-24 series indoor AC MV vacuum circuit breaker is an indoor switchgear for three-phase AC 50Hz, rated voltage 4KV power system.
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ZN63(VS1)-24 series indoor AC MV vacuum circuit breaker is an indoor switchgear for three-phase AC 50Hz, rated voltage 4KV power system.
Overview
ZN63(VS1)-24 series indoor AC MV vacuum circuit breaker is an indoor switchgear for three-phase AC 50Hz, rated voltage 4KV power system. The market combines years of professional production experience to develop and design a new generation of vacuum circuit breakers.
Model Meaning
| VS | 1 | – | 24 | / | □ | – | □ |
| ↓ | ↓ | ↓ | ↓ | ↓ | |||
| Indoor high voltage vacuum circuit breaker | Product design serial number | Rated voltage (KV) | Rated current (A) | Rated short circuit breaking current(kA) |
Main Technical Parameters
| Item | Units | Argument | ||
| Rated voltage | kV | 24 | ||
| Rated short-term power frequency withstand voltage(1min) | 65/79(alternating,facing ground/fracture) | |||
| Rated lightning impulse withstand voltage(peak value) | 125/145(alternating,ground/fracture) | |||
| Rated frequency | Hz | 50 | ||
| Rated current | A | 6301250 | 63012501600 200025003150 | 63012501600 200025003150 |
| Rated short-circuit breaking current | 20/25 31.5 40 | |||
| Rated short-time withstand current | kA | 20/25 31.5 40 | ||
| Rated short-circuit duration | S | 4 | ||
| Rated peak withstand current | 50/63 80 100 | |||
| Rated short-circuit closing current | kA | 50/63 80 100 | ||
| Power frequency withstand voltage of the secondary circuit(1 minute) | V | 2000 | ||
| Rated breaking current of single/back-to-back capacitor banks | A | 630/400(40kA is 800/400) | ||
| Rated capacitor bank closing inrush current | kA | 12.5(Frequency not exceeding 100OHz) | ||
| Mechanical life | Frequency | 20000 | ||
| Rated current breaking times(electrical life) | 20000 | |||
| Rated short-circuit current breaking times | 50(40kA≤30) | |||
| The cumulative allowable wear thickness of the moving and static contacts | mm | 2 | ||
| Energy storage time | S | ≤10 | ||
| Contact opening distance | mm | 16±1 | ||
| Overtravel | 3.5±0.5 | |||
| Contact closing and bouncing time | ms | ≤2 | ||
| The asynchronous opening and closing of the three phases | ≤2 | |||
| Average opening speed(contact separation -8mm) | m/s | 1.5±0.2 | ||
| Average closing speed (8mm-contact closure) | 0.8±0.2 | |||
| Resistance of the dominant electrical circuit | μΩ | ≤50(630A)≤45(1250A);≤35(1600-2000A)≤25(2500A) | ||
| Rated operating sequence | Score-0.3 Combined score 180s-combined score | |||
External Mounting Dimension (mm)
| Rated voltage | Rated breaking current | Phase spacing | A | B | C | D |
| 630A 1250A 1600A | 25kA 31.5kA 40kA | 210 | 652 | 682 | 638 | 277 |
| 275 | 852 | 882 | 838 | 377 |
| Rated voltage | W |
| 630A | φ35 |
| 1250A | φ49 |
| 1600A | φ55 |
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