- High voltage AC SF6 circuit breaker LW□-252KV 4000A 50KA from JUCRO ElectricDetail Information
Outdoor high voltage AC SF6 circuit breaker LW□-252KV 4000A 50KA from JUCRO Electric
Meaning of type
The LW□-252/4000-50 self-extinction Ac circuit breaker which is outdoor type finds its universal range of applications for the electrical system with elevation not greater than 2000m, ambient temperature not lower than-30C, dirtiness grade not higher than IV, alternating current 50Hz and the maximum voltage 126kV. It is used for cutting the rated current, malfunction current or switching the circuitry, to control and protect the electrical system, and it can also be used for connecting with the circuit breaker
The gas of the SF6 is employed as the arc-extinguishing medium and the dielectric material. The self-extinction technology and the new-type spring operating mechanism are introduced in the SF6 circuit breaker. Thus the circuit breaker has good qualities with long electrical life, low operation power, lower noise, high reliability, simple structure, small and long overhaul periods. It can fully replace the import same type one.
Caracteristic of structure
The breaker introduces the three-phase porcelain -pole with single interrupter structure. A spring operating mechanism is supplied and the mechanical action of the three-phase is inner connected. The gas of the SF6 is connected in the three-phase pole parts. A density controller with temperature compensation is used to monitor the gas of the SF6. Because of the self-extinction arc control principle and optimized design, it improves the efficiency of mechanism and reduces the operating power
Excellent breaking performance and long electrical life
High mechanism reliability and can be operated frequently
Because of the high insulation intensity and excellent contact movement, the breaking capacity current will not re-burn
The circuit breaker has high outer insulation level and ratio creepage distance is greater than. So it has excellent performance of resisting the filth and the earthquake, it is also can be operated safely under the environment with atrocious weather
High carrying ability: it has high capability margin as the temperature of each contact rises when it is under temperature rise test in the circuit (1.2 times 0f 4000A)
The appearance of the breaker is compact, and the installation and debugging is very easy. The maintenance is also very convenient.
Main technical data of breakerNoNameUnitValue1Rated voltageKV2522Rated power frequency withstand voltage(1 min)To earthKV460Between interrupterKV460+1463Rated thunder impulse withstand voltageTo earthKV1050Between interrupterKV1050+2064Rated frequencyHZ505Rated currentA40006Amplitude factor1.37Rated short-circuit breaking currentKA508Rated short-circuit making current(peak)KA1259Rated short-circuit withstand currentKA5010Rated peak value withstand currentKA12511Rated short-circuit durations312Rated out-of-phase breaking currentKA12.513Breaking current of close-in faultKA90%lk,75%lk14Rated line-charging breaking currentA20015Operating sequence0-0.3s-CO-180s-CO16Resistance of the main circuitµΩ≤5517Rated gauge pressure of SF6(20℃)Mpa0.618Minimum functional gauge pressure(20℃)Mpa0.55±0.015/0.50±0.01519Annual leakage rate of SF6≤0.5%20Amount of water of SF6(V/V)ppm≤15021Mechanical lifetimes1000022Electrical level of radio interferenceµ V<50023Creepage distanceBetween interruptermm≥8660To earthmm≥690024Each filled with SF6 gas weightkg2525Weight per breakerkg1500
Main technical data of structureNoNameUnitValue1Auxiliary circuit voltageVDC220V、AC220V2The voltage/current of the opening and closing coilsV/ADC110/4;Dc220/2.53Energy storage motorRated voltageVDC220V、AC220VThe range of normal working voltageV5%-110%PowerW6004The energy storage time of motors≤155The loop voltage of the heater and the lampVAC220V6Rated voltage of the auxiliary switchVDC220V、AC220V7Rated current of the auxiliary switchA108Contacts of the auxiliary switches10 normal opened contacts and 10 normal closed contacts
Mechnical adjustment of the breakerNoNameUnitValue1Center distance between polesmm3000-40002Strode length of the movingmm160±33Contact stroke length of the moving contactmm50±24Switch- off timem/s30±55Switch- on timem/s90±156Break timems≤607Switch-on/off timems≤808Switch- off/on timems3009The time difference of the opening of three phasesms≤310The time difference of the closing of three phasesms≤5
The type and the specification of the circuit breaker.
Rated electric parameter(voltage, current, rated short-circuit breaking current and so on)
Environmental condition(temperature, altitude, filth level and so on)
Rated electric parameter of control loop(rated voltage of energy storage motor, rated voltage of the opening and closing coils).
The name and the number of the accessories when required.
The connection of the primary upper terminal.
1. Weight: 4500kg( with gas)
Total weight of gas: 24kg
2. Foundation load: static state 4500kg(three level)
Dynamic horizontal direction F: 2500kg
Vertical direction(upward): 3500kg;
Vertical direction(downward): 6000kg
3. Level degree of concrete surface not exceeds 1.5mm
4. Mounting hole for connection of terminal block and primary line, users shall drill as required on site
Material of terminal block: aluminum alloy 2A12-T4Packing & Delivery
Strong package, Safety first.Inside with foam to support the product, put it in carton or wooden box, fixed it on pallet.
As long as possible to keep the products safe until it arriving customer's warehouse.
Clearly marking label outside of package, customers will be easy to identify their goods.This is a title20000 M2 of JUCRO Electric company land1500 M2 of office building5000 M2 of workshop buildingWorkshop
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