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Basic Info.
| Model NO. | VACFR25-12D/T125-31.5 |
| Series | Three |
| Certification | CE, ISO9001 |
| Brand | Vacem |
| Rated Current | 125A |
| Rated Shift Current | 1200A |
| Rated Short-Circuit Making Current | 50kA |
| Rated Voltage of Auxiliary Loop | AC/DC220,110V |
| Mechanical Life | 6000 times |
| Trademark | VACEM |
| Origin | Wenzhou, China |
1.General description
VACF25-12D/T125-31.5 indoor AC M.V. vacuum load break switch-fuse combined electric appliance is the indoor installment with tri-phase AC 50Hz, rated voltage 12kV, which is suitable for load control and short-circuit protection using in industry and mining situation and so on enterprise substation and transformer substation. It is equipped with an earthing switch that may withstand short-circuit current. The operating mechanism can be possible manually and electrically operated that is advantageous to realize three remote controls requirement of electrical power system.
VACF25-12D,VACFR25-12D load switch and combination electric appliance are suitable for load control and short-circuit protection, using in urban power station and industrial electric appliance supply by tri-phase ring network or terminal. For the protection of combined electric appliance on electrical appliance equipment is more reliable, economical than circuit breaker electrical appliance equipment such as the transformer, especially is for the ring net, double radiation power supply unit and box type transformer substation.
2.Main technical parameter
a. Main technical parameter of load break switch and combined appliance is seen in Table.1
| Item | Unit | VACFR25-12D/T125-31.5 |
| Rated voltage | kV | 12 |
| Rated frequency | Hz | 50 |
| Rated current | A | 125 |
| Rated insulation level 1 min P.F. withstand voltage(effective value) | kV | Vacuum interrupter fracture 30 |
| kV | Phase to phase, to earth 42; isolating fracture 48 | |
| Rated insulation level lightning impulse withstand voltage(peak) | kV | Vacuum interrupter fracture 60; to earth |
| kV | Phase to phase 75; isolating fracture 85 | |
| Rated breaking no-load transformer capacity | kVA | 1600 |
| Rated shift current | A | 2000 |
| Fuse type | SDLAJ-12 | |
| SFLAJ-12 | ||
| Output energy of fuse ram | J | 2-5(middle) |
| Rated short-circuit making current | kA | 50 |
| Rated dynamic stability current of earth switch | kA | 50 |
| 2s thermal stability current of earth switch | kA | 20 |
| Rated voltage of auxiliary loop | V | AC/DC220,110 |
| Mechanical life | times | 6000 |
b. Mechanical property of load break switch and combined appliance is seen in Table.2
| Item | Unit | Data |
| VACFR25-12D/T125-31.5 | ||
| Air distance between electrics and earth | mm | ≥125 |
| Depth of conductive tube inserted into fixed contact-base | mm | ≥18 |
| Opening distance of vacuum interrupter | mm | 6(+1,0) |
| Contact spring compression of vacuum interrupter | mm | 2(+1,0) |
| Average closing speed of vacuum interrupter | m/s | 0.6±0.2 |
| Average opening speed of vacuum interrupter | m/s | 1±0.2 |
| Closing bounce time | ms | ≤2 |
| Tri-phase opening synchronous | ms | ≤3 |
| Main circuit resistance | μΩ | ≤300 |
| Manual operation max.torque | N.m | ≤160 |
| Opening time of fuse triggering | ms | 30~40 |
| Opening time of release triggering | ms | 40~45 |
c. Energy-stored motor data is seen in Table.3
| Type | Rated voltage(kV) | Rated current(A) | Rated power(W) | Normal operation voltage range |
| 66ZY-CJ01B8 | DC220 | 0.7 | 70 | 85%~110% rated voltage |
| 66ZY-CJ02B | DC110 | 1.5 |
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