132kv SF6 gas vacuum circuit breaker 3 phase electrical circuit breakers
Product Description
Product Description Product Overview Overview
Type LWA-126/T3150-40 High Voltage SF6 circuit breaker for outdoor use adopts SF6 as insulation and arc extinguishing medium. It can make, carry and break the normal circuit current in high voltage transmission lines; it also can operate short current or overload current of Switchgear. Its structure use porcelain type, can be operated like three-phase opening, closing and auto-reclosing, protect and control transmission lines in 50Hz, 126kV circuit.
The Circuit Breaker adopts self-extinguish principle, equipped with spring mechanism. When the circuit breaker got a opening order, the rigid parts consisted of cylinder, movable arc contacts, rod move downwards under the opening spring force. During movement, main fixed contacts leave the movable main contacts, the current moves to arc contacts, then the arc contacts depart, the arc appears between the fixed contacts and movable contacts. When it breaks short current, high capacity current leads to great energy between arc contacts, hot gas flow inrushes thermal expansion chamber and exchange thermal energy there, then the gas become low temperature and high pressure. Now, because the pressure of thermal expansion chamber is greater then auxiliary gas chamber, so the check valve of interrupter is closed. When the current value is zero, the high pressure gas of thermal expansion chamber blow to the gap contrarily, so the arc extinguished. When it breaks low current( less than several thousand amperes), due to low energy, the rising speed of gas pressure in expansion chamber is slower than auxiliary chamber, the check valve is open, the compress gas blow to the expansion chamber, the gas flow occur, then the arc extinguished when the current value is zero.
Standards:GB1984,GB/T11022,GB3309,GB8905,GB11023 ,GB12022,DL/T402,JB/T9694,IEC62271-100 Main features⚫Adopt self-extinguish principle, small operating energy, light mechanical impact;
⚫Use spring mechanism, its performance is not relevant to temperature, stable performance;
⚫Optimized interrupter structure and movement curve of contact, high reliability on breaking current;
⚫Reignite and restrike cannot occur under breaking capacitive current;
⚫Optimized pole and frame design with higher capability to endure earthquake;
⚫High reliability, long average normal service time, low maintenance cost;
⚫Convenient installation and configuration in field, it takes only one day or two days;
⚫Low operating noise, suit for residential area.:Environmental conditions
Main Technical data
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Type LWA-126/T3150-40 High Voltage SF6 circuit breaker for outdoor use adopts SF6 as insulation and arc extinguishing medium. It can make, carry and break the normal circuit current in high voltage transmission lines; it also can operate short current or overload current of Switchgear. Its structure use porcelain type, can be operated like three-phase opening, closing and auto-reclosing, protect and control transmission lines in 50Hz, 126kV circuit.
The Circuit Breaker adopts self-extinguish principle, equipped with spring mechanism. When the circuit breaker got a opening order, the rigid parts consisted of cylinder, movable arc contacts, rod move downwards under the opening spring force. During movement, main fixed contacts leave the movable main contacts, the current moves to arc contacts, then the arc contacts depart, the arc appears between the fixed contacts and movable contacts. When it breaks short current, high capacity current leads to great energy between arc contacts, hot gas flow inrushes thermal expansion chamber and exchange thermal energy there, then the gas become low temperature and high pressure. Now, because the pressure of thermal expansion chamber is greater then auxiliary gas chamber, so the check valve of interrupter is closed. When the current value is zero, the high pressure gas of thermal expansion chamber blow to the gap contrarily, so the arc extinguished. When it breaks low current( less than several thousand amperes), due to low energy, the rising speed of gas pressure in expansion chamber is slower than auxiliary chamber, the check valve is open, the compress gas blow to the expansion chamber, the gas flow occur, then the arc extinguished when the current value is zero.
Standards:GB1984,GB/T11022,GB3309,GB8905,GB11023 ,GB12022,DL/T402,JB/T9694,IEC62271-100 Main features⚫Adopt self-extinguish principle, small operating energy, light mechanical impact;
⚫Use spring mechanism, its performance is not relevant to temperature, stable performance;
⚫Optimized interrupter structure and movement curve of contact, high reliability on breaking current;
⚫Reignite and restrike cannot occur under breaking capacitive current;
⚫Optimized pole and frame design with higher capability to endure earthquake;
⚫High reliability, long average normal service time, low maintenance cost;
⚫Convenient installation and configuration in field, it takes only one day or two days;
⚫Low operating noise, suit for residential area.:Environmental conditions
Installation site | outdoor |
Ambient temperature | -25℃~+40℃ |
Max. daily temperature difference | ≤25℃ |
Height above sea level | 2000m(no limit for specified order) |
Air humidity | Daily average:≤95%; month average:≤90%; |
Wind speed | ≤34m/s |
Solar radiation | ≤0.1W/cm2(fine day, noon) |
Earthquake intensity | horizontal:≤0.3g;vertical:≤0.15g |
Icing thickness | ≤10mm |
Creepage distance | 25mm/kV or 31mm/kV |
Static load on terminal in Y-direction | 1250N |
Static load on terminal in X-direction | 750N |
Static load on terminal in Z-direction | 1000N |
No. | Items | Unit | Parameter | ||||
1 | Rated voltage | kV | 126 | ||||
2 | Rated power frequency withstand voltage(1min) | Phase-to-phase Phase-to-ground | kV | 230 | |||
fracture | kV | 230+73* | |||||
3 | Rated lightning impulse withstand voltage | Phase-to-phase Phase-to-ground | kV | 550 | |||
fracture | kV | 550+103* | |||||
4 | Power frequency withstand voltage(5min)under SF6 zero-gauge pressure | kV | 95 | ||||
5 | Rated frequency | Hz | 50 | ||||
6 | Rated current | A | 3150 | ||||
7 | Rated short circuit breaking current | kA | 40 | ||||
8 | First-pole-to-clear factor | 1.5 | |||||
9 | Rated short circuit breaking current (DC component) | More than 41% | |||||
10 | Rated short circuit making current (peak) | kA | 100 | ||||
11 | Rated short time withstand current(rms) | kA | 40 | ||||
12 | Rated peak withstand current | kA | 100 | ||||
13 | Rated short circuit duration | s | 4 | ||||
14 | Rated out-of-phase breaking current | kA | 3(OP1) ,10(OP2) | ||||
15 | Short range breaking current | kA | 36;30 | ||||
16 | Wrong-phase earthing fault breaking current | kA | 34.8 | ||||
17 | Rated line charging switching current | A | 31.5 | ||||
18 | Full capacity breaking time without check and repair | Times | 20 or rated current breaking times:3000 | ||||
19 | Rated operating sequence | O-0.3s-CO-180s-CO | |||||
20 | Rated SF6 pressure (20℃ gauge) | MPa | 0.6 | ||||
21 | alarm/Lock pressure(20℃ gauge) | MPa | 0.55/0.50 | ||||
22 | SF6 annual leakage rate | %/Y | ≯0.5 | ||||
23 | Gas moisture content | Check value after hand over | μL/L | ≯150 | |||
Allowed service value | μL/L | ≯300 | |||||
24 | Resistance of the main circuit | μΩ | ≤35 | ||||
25 | Mechanical life | Time | 6000 | ||||
26 | Radio interference level (1.1Ur/) | μV | ≯500 | ||||
27 | Allowed partial discharge intensity(1.2Ur) | pC | ≤5 | ||||
28 | Noise(distance from sound source:horizontality:2m、height:1.5m) | dB | 90 |
Product Categories : MV,HV Electrical Components > Circuit Breaker
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