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Technical data:
LW36-72.5 outdoor high voltage AC SF6 circuit breaker | |||
Name | Unit | Value | |
Rated voltage | kV | 72.5 | |
Rated power frequency withstand voltage(1min) | To earth | kV | K·160 |
Between interrupter | K·200 | ||
Rated thunder impulse withstand voltage | To earth | K·350 | |
Between interrupter | K·410 | ||
Powerfrequency withstand voltage under zero gauge pressure of SF6(5min) | K·84 | ||
Rated frequency | Hz | 50 | |
Rated current | A | 3150 | |
Amplitude factor | 1.5 | ||
Rated short-circuit breaking current | KA | 31.5 | |
Rated short-circuit breaking current(peak) | KA | 80 | |
Rated short-circuit with stand current | KA | 31.5 | |
Rated peak value withstand current | 80 | ||
Rated short-circuit duration | s | 4 | |
Rated out-of-phase breaking current | KA | 8 | |
Breaking current of close-in fault | KA | 90%lk,75%lk | |
Rated line-charging breaking current | A | 10 | |
Operating sequence | O-0.3s-CO-180s-CO | ||
Resistance of the main circuit | μ Ω | ≤40 | |
Rated gauge pressure of SF6(20°C) | Mpa | 0.4 | |
Minimum functional gauge pressure(20°C) | Mpa | 0.35±0.03/0.30±0.03 | |
Annual leakage rate of SF6 | <0.5% | ||
Amount of water of SF6(V/V) | ppm | ≤150×10-6 | |
Mechanical life | times | 10000 | |
Electrical level of radio interference | μ V | ≤500 | |
Creepage distance | Between interrupter | mm | 2585 |
To earth | 2248 | ||
Weight of the SF6 | kg | 8 | |
Weight of the circuit breaker | kg | 1300 | |
note:external insulation level is changed by modified coefficient. Every 2000m of altitude, K=1.13;altitude3000m, K=1.28 |
mian technical data of structure | |||
Name | Unit | Value | |
Auxiliary circuit voltage | V | DC220 or DC110 | |
Thevoltage/current of the opening and closing coils | V/A | DC110/4;DC220/2 | |
Eenergy storage motor | Rated voltage | V | DC220,AC220/DC110,AC110 |
The range of normal working voltage | V | 85%-110% | |
Power | W | 600 | |
The energy storage time of motor | s | ≤15 | |
The loop voltage of the heater and the lamp | V | AC220 | |
Rated voltage of the auxiliary switch | V | DC220,AC220 | |
Rated current of the auxiliary switch | A | 10 | |
Contacts of the auxiliary switches | 10 normal opened contacts and 10 normal closed contacts |
Mechnical adjustment of the breaker | |||
Name | Unit | Value | |
Center distance between poles | mm | 1200 | |
Strode length of the moving contact | mm | 120+30 | |
Contact stroke length of the moving contact | mm | 25+20 | |
Length of the inter phaseoperating connecting rod | mm | 110+30 | |
Switch-off speed | m/s | 4.2-5m/s | |
Switch-on speed | m/s | 2.2-3m/s | |
Switch-off time | ms | ≤40 | |
Switch-on time | ms | ≤100 | |
Break time | ms | ≤60 | |
Switch-on/off time | ms | ≤80 | |
Switch-off/on time | ms | 300 | |
The time difference of the opening of three phases | ms | ≤2 | |
The time difference of the closing of three phases | ms | ≤3 |
used circuit breakers
SF6 Circuit Breaker,used circuit breakers