ZN63(VS1)1-12 indoor M.V
Indoor Drawout Type (Daul-Spring) Vcb Vacuum Circuit Breaker for Medium Voltage Switchgear
Product Description
1.General description
ZN63(VS1)1-12 indoor M.V. is an indoor switchgear with tri-phase AC 50Hz,rated voltage of 12kV,control and protection for industrial and mining enterprises,power plants and substations,electrical facilities and for frequent operation place adopting VET operating mechanism and circuit breaker integrated design can be used as a fixed installation unit can also be equipped with special advance mechanism,the composition of handcart unit used some of the main circuit can use the whole solid seal post with high reliability,maintenance free,in order to achieve smaller circuit breaker,can be equipped with KYN2BA 12(GZS) and other handcart switch cabinet.In the home it can also be used with fixed XGN switchgear.
ZN63 is regular type mechanism,ZN83 is improved on the basis of ZN63.All ZN83 mechanisms can be replaced by ZN63 mechanisms,they are universal mechanism.
2.Main technical parameter
| Item | Unit | Date |
| Rated voltage | kV | 12 |
| Rated frequency | Hz | 50 |
| Rated insulation level | 1min power frequency withstand voltage | pole to earth | kV | 42 |
| phase | kV | 48 |
| lightning impulse withstand voltage | pole to earth | kV | 75 |
| phase | kV | 85 |
| Power frequency withstand voltage of secondary circuit | V | 2000 |
| Rated current(1) | A | 630 | 630 | 630 | 2000 | 1250 | 2500 | 1600 | 3150 |
| 1250 | 1250 | 1250 | 2500 | 1600 | 3150 | 2000 | 4000 |
|
| 1600 | 3150 | 2000 | 4000 | 2500 | 5000 |
| Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 | 50 |
| Rated short-time withstand current | kA | 20 | 25 | 31.5 | 40 | 50 |
| Rated short circuit duration | s | 4 |
| Rated peak withstand current | kA | 50 | 63 | 80 | 100 | 125 |
| Rated short-circuit making current | kA | 50 | 63 | 80 | 100 | 125 |
| Rated short-circuit current breaking time (class E2) | times | 30 |
| Rated single/back to back capacitor bank breaking current | A | 630/400 | 800/400 |
| Clearance between open contacts | mm | 11±1 |
| Contact stroke | mm | 3~4 |
| Allowable wear thickness of contact | mm | 3 |
| Average opening speed | m/s | 0.9~1.4 |
| Average closing speed | m/s | 0.5~1.0 |
| Contact closing bounce time | ms | ≤2 |
| Different phase of contact closing and opening | ms | ≤2 |
| Rebound amplitude of opening contact | mm | ≤2 |
| Opening time (rated voltage) | ms | 20~50 |
| Closing time (rated voltage) | ms | 30~70 |
| Mechanical life (M2) | times | 10,000(20,000) |
| Rated operating voltage | V | AC110/220 DC110/220 |
| Rated operation sequence |
| 0-0.3s-CO-180s-CO |
(1)It is forced cold air when rated current is 4000A
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