FN12-12 Series AC H.V vacuum Load Break Switch
◆ Application
It is used in the ring network city distribution and industrial equipment of 12kV and three-phase AC 50Hz to cortrol loadand short-circuit.because the switch with fuse protecting transformer etc more reliably than circuit breaker.it is especialy suitablefor ring network clouble radial distribution and package substation.
◆ Standard
a、GB3804-90《3～63kV AC H.V load switch》.
b、GBXXXX-XX《AC H.V load switch with fuse box》(the same IEC420-1990).
C、GB1995-89《AC H.V isolate switch and earth switch》。
◆ Service condition
A.The ambient air temperature:Max.:+40℃，Min.:-25℃.
B.The altitude≤1000m.
C.The relatire humidity of air.daffy average≤90％.monthly average≤95％.
D.The ambient air should not be obviously polluted by corrosivity or the flammability gas and geam.etc.
E、Without frequent shake.
F、Enviroment degree:grade II.
If requirements are not mentioned above,users can fix them with the manufacturer.
◆ Type and meaning
◆ Technical parameter and performances(please see the table)
| Number | Name | Unit | FN12-12D/630 | FN12-120D(R)D/100 |
| 1 | Rated voltage | KV | 12 | |
| 2 | Rated frequency | Hz | 50 | |
| 3 | Rated current | A | 630 | 100 |
| 4 | Lighting impulse resisting voltage | kV | To ground，interphase 75 isolation break 85 | |
| 5 | 1 min power frequency withstand voltage | kV | To ground，interphase 42 isolation break 48 | |
| 6 | Rated heatstability current | kA | 20(2S) | |
| 7 | Rated machinestability current | kA | 50 | |
| 8 | Rated closing current(peak) | kA | 50 | 50 |
| 9 | Rated shortcircuit breaking current(prospective value) | kA | 31.5 | |
| 10 | Max. critical breaking current I2*t | A2S | fuse box characterisitic curve | |
| 11 | Min. breaking current | kA | fuse box characterisitic curve | |
| 12 | Rated transfer current | kA | 1.5 | |
| 13 | Max. breaking current (reference value) | kA | 1.8 | |
| 14 | Breaking no-load transformer capacity | kva | 1250 | |
| 15 | Rated cable charging current | A | 10 | |
| 16 | Rated power load current breaking times | 次(Times) | >100 | |
| 17 | Switchoff time of rated power load current switch on-and off | S | >0.06 | |
| 18 | Earth switch heat-stability current | kA | 20(2S) | 20(2S) |
| 19 | Earth switch heat-stability current(peak) | kA | 50 | 50 |
| 20 | Motor operating power valtage | V | Pay110、200 direct current | |
◆ Mechanical characteristic parameter
| Number | Name | Unit | FN12-12D/630 | FN12-12D(R)D/100 |
| 1 | Machine contact qeneral travel | Mm | 200 | +8 |
| -2 | ||||
| 2 | Interphase distance(before mechansim store energy) | mm | 210±3 | |
| 3 | Dynamic contact ultra travel | mm | 40±2 | |
| 4 | Auxiliary contact distance | mm | 150 | |
| 5 | Three-phase switch on-and-off synchroneity | ms | <3 | |
| 6 | Switch-off speed | m/s | >2.8 | >2.8 |
| 7 | Switch-off speed | m/s | >3.8 | |
| 8 | Distance between metal valve and conducting pipe | mm | >125 | |
| 9 | Earth switch fracture distance | mm | >150 | |
| 10 | Main. loop resistance | μΩ | <120 | <300 |
| 11 | Max. opertaing moment | Nm | <160 | |
Note:
1. When measuring auxiliary contact distance. Add 24mm static contact to the conducting pipe.
2. When measuring FN12-12(R)D main loop resistance, the fuse box can be replaced by the conducting bar ignoring its resistance.
◆ Structure.appearance and installation diagram
◆ Structure.appearance and installation diagram
◆ Structure.appearance and installation diagram
