{"id":829,"date":"2021-04-27T06:45:08","date_gmt":"2021-04-27T06:45:08","guid":{"rendered":"https:\/\/www.wolunelectric.com\/?post_type=product&p=829"},"modified":"2026-05-13T15:05:10","modified_gmt":"2026-05-13T07:05:10","slug":"vs1-12zn63a-12-12kv-indoor-vacuum-circuit-breaker12kv-vcb","status":"publish","type":"product","link":"https:\/\/www.wolunelectric.com\/th\/product\/vs1-12zn63a-12-12kv-indoor-vacuum-circuit-breaker12kv-vcb\/","title":{"rendered":"VS1-12(ZN63A-12) 12KV Indoor Vacuum Circuit Breaker(12kV VCB)"},"content":{"rendered":"

 <\/p>\n

General Introduction:<\/strong><\/h2>\n

VS1-12(ZN63A-12) 12kV Indoor Vacuum Circuit Breaker (VCB) is a mainstream medium voltage indoor switchgear for 12kV power distribution system.<\/p>\n

It uses high-performance vacuum interrupter as arc quenching medium, features small size, light weight, zero pollution, low noise and maintenance-free operation.<\/p>\n

Available in fixed type and withdrawable trolley type<\/strong>, perfectly matched with KYN28 indoor switch cabinet. It is the ideal choice for commercial buildings, industrial plants, power plants, substations and new energy power distribution projects.<\/p>\n

 <\/p>\n

Working Conditions<\/strong><\/h2>\n

1.Ambient temperature: not higher than +40 \u00b0C, not less than -15\u00b0C<\/p>\n

2. Altitude: not exceed 1000m.<\/p>\n

3. Relative humidity: daily average of not more than 95%, month average of not more than 90%.<\/p>\n

4. Earthquake intensity: not more than ten.<\/p>\n

5. No fire, explosion hazard, serious filthy, chemical corrosion, as well as places of intense vibration.<\/p>\n

 <\/p>\n

Key Features<\/h2>\n

Vacuum interrupter arc extinction, safe, environmental friendly and no pollution<\/p>\n

Compact integrated structure, small installation space<\/p>\n

Maintenance-free during normal service life, low operation cost<\/p>\n

High short-circuit breaking capacity, stable and reliable performance<\/p>\n

Optional fixed type \/ withdrawable trolley type for cabinet installation<\/p>\n

Spring operating mechanism, flexible manual and electric operation<\/p>\n

Strong mechanical life, suitable for frequent switching operation<\/p>\n

Good seismic and anti-corrosion performance, long service lifespan<\/p>\n

 <\/p>\n

Technical Specification:<\/strong><\/h2>\n

Model: VS1-12 \/ ZN63A-12<\/p>\n

Rated Voltage: 12kV<\/p>\n

Rated Frequency: 50Hz<\/p>\n

Rated Current: 630A, 1250A, 1600A, 2000A, 2500A, 3150A<\/p>\n

Rated Short-circuit Breaking Current: 20kA, 25kA, 31.5kA, 40kA<\/p>\n

Rated Short-time Withstand Current: 20kA~40kA \/ 4s<\/p>\n

Installation Type: Indoor Fixed \/ Withdrawable Trolley Type<\/p>\n

Arc Quenching Medium: Vacuum<\/p>\n

Operating Mechanism: Spring Type<\/p>\n

Ambient Temperature: -20\u2103 ~ +40\u2103<\/p>\n

Applicable Altitude: \u22641000m<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
NO<\/td>\nItem<\/td>\nUnits<\/td>\nparameters<\/td>\n<\/tr>\n
1<\/td>\nRated voltage<\/td>\nKV<\/td>\n12<\/td>\n<\/tr>\n
2<\/td>\nRated Frequency<\/td>\nHZ<\/td>\n50<\/td>\n<\/tr>\n
3<\/td>\nRated Current<\/td>\nA<\/td>\n630.1250.1600.2000.3150<\/td>\n<\/tr>\n
4<\/td>\nRated short-circuit breaking current<\/td>\nKA<\/td>\n20 25 31.5<\/td>\n<\/tr>\n
5<\/td>\nRated short-circuit closing current (peak)<\/td>\nKA<\/td>\n50 63 80<\/td>\n<\/tr>\n
6<\/td>\nRated short-circuit duration<\/td>\nS<\/td>\n4<\/td>\n<\/tr>\n
7<\/td>\nRated short-circuit breaking current breaking number<\/td>\nnos<\/td>\n50s<\/td>\n<\/tr>\n
8<\/td>\nRated operating sequence<\/td>\n<\/td>\n0-0.3s-CO-180s-CO<\/td>\n<\/tr>\n
9<\/td>\nRated lightning impulse withstandvoltage<\/td>\nkv<\/td>\n125<\/td>\n<\/tr>\n
10<\/td>\n1min power frequency withstand voltage<\/td>\nKV<\/td>\n65<\/td>\n<\/tr>\n
11<\/td>\nClosing time<\/td>\nms<\/td>\n\u2264 70<\/td>\n<\/tr>\n
12<\/td>\nopening time<\/td>\nms<\/td>\n\u2264 50<\/td>\n<\/tr>\n
13<\/td>\nMechanical life<\/td>\nTimes<\/td>\n20000<\/td>\n<\/tr>\n
14<\/td>\nRated Storage and operation voltage<\/td>\nV<\/td>\nAC DC 220\/110<\/td>\n<\/tr>\n
15<\/td>\nBreaking life<\/td>\nms<\/td>\n\u2264 80<\/td>\n<\/tr>\n
16<\/td>\nStorage life<\/td>\ns<\/td>\n\u2264 10<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/h2>\n

Application Scope<\/h2>\n
Widely used in 12kV indoor switchgear, power substations, industrial and mining enterprises, commercial complex, residential district power distribution, solar and wind power station, factory incoming and outgoing line protection, overload and short-circuit fault control.<\/div>\n
<\/div>\n

Our Service<\/h2>\n
We supply full range VS1-12(ZN63A-12) 12kV vacuum circuit breaker with complete specifications and factory direct price. Support OEM, customized drawing, technical parameter selection and global after-sales technical support.<\/div>\n
<\/div>\n

Fixed Type drawings\uff1a<\/h2>\n

\"\"<\/p>\n

Draw-out Type drawings\uff1a<\/h2>\n

\"\"<\/p>\n

 <\/p>\n

\"vs1 \"vs1<\/p>","protected":false},"excerpt":{"rendered":"

VS1-12 also named ZN63A-12 is 12kV indoor vacuum circuit breaker (VCB). Adopting vacuum interrupter for arc extinction, no pollution, maintenance-free, widely used in 12kV indoor high voltage switch cabinet for power distribution protection and control.<\/div>\n
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