|
[China]
Trade Verify
Address: Weibei industrial zone, Lintong district, Shanxi. CHINA
Contact name:Emma
Xi'an Xigao Electricenergy Group Co., Ltd. |
|
Verified Suppliers
|
|
|
1.LW36kV SF6 HV Overload Switch Circuit Breaker Load Switch
LW36-126/T3150-40 outdoor high voltage SF6 circuit breaker uses SF6
as the insulating arc extinguishing medium. It can connect,
transmit and disconnect the normal circuit current in the high
voltage transmission line; It can also operate the short circuit
current or overload current of switchgear. Its structure adopts
porcelain type, which can carry out the operation of three-phase
opening and closing and automatic reclosing. It can protect and
control the transmission line in the 50Hz and 126kV line.
The circuit breaker adopts self-extinguishing principle and is
equipped with spring mechanism. When the circuit breaker gets the
break command, the rigid parts are moved down by the cylinder, the
active arc contact, and the rod under the action of the break
spring. When moving, the main fixed contact leaves the active main
contact, and the electric current moves to the arc contact, and the
arc contact leaves, and an arc appears between the fixed contact
and the active contact. When it breaks off the short current, the
high capacity current causes a lot of energy between the arc
contacts, and the hot gas flows into the thermal expansion chamber,
where heat energy is exchanged, and the gas becomes low temperature
and high pressure. Now, because the pressure in the thermal
expansion chamber is greater than that in the auxiliary chamber,
close the check valve of the interrupter. When the current value is
zero, the high-pressure gas in the thermal expansion chamber blows
back to the gap, and the arc goes out. When it breaks a small
current (less than a few thousand amperes), due to low energy, the
rising speed of gas pressure in the expansion chamber is slower
than the auxiliary chamber, the check valve opens, the compressed
gas blows into the expansion chamber, the gas flows, when the
current value is zero, the arc goes out.
2.Main features:
1.Adopt self-extinguish principle, small operating energy, light
mechanical impact;
2.Use spring mechanism, its performance is not relevant to
temperature, stable performance;
3.Optimized interrupter structure and movement curve of contact,
high reliability on breaking current;
4.Reignite and restrike cannot occur under breaking capacitive
current;
5.Optimized pole and frame design with higher capability to endure
earthquake;
6.High reliability, long average normal service time, low
maintenance cost;
7.Convenient installation and configuration in field, it takes only
one day or two days;
3.Technical parameters
| NO. | ltems | 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-1o-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 Raled short circuit breaking current | A | 3150 | |
| 7 | kA | 40 | ||
| 8 | First-pole-to-clear factor | 1.5 | ||
| 9 | Rated short circuit making current(DC component) | More than 41% | ||
| 10 | Rated short circuit making current(peak) | kA | 100 | |
| 11 | Rated short time withstand current(ms) | kA | 40 | |
| 12 | Rated short time 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 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 | ||
| 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 |
5. FAQ
1. All our activities are accredited to ISO 14001:2015 and IEC standard.
2. Technology ensure the quality satisfy international request.
3．Generally we promise one - two years quality guarantee, some products will be extended longer time for life span.
4. For tender cooperation, it is welcome to discuss the detail in between.
