Item:LW-252
Outdoor 252kv SF6 circuit breaker vcb
ROCKWILL developed LW36-252 type outdoor SF6 gas circuit breaker using modern processing technology and computer-aided design techniques, combined
with the latest generation of spring bodies and the advantages of a permanent institution. Its pursuit of high reliability, easy to maintain design concepts to create ageneration of superior product, is the most reliable electric power system and the best option.
ROCKWILL all series switches meet the following criteria:
ANS/IEEE C37.60/IEC 62271-100(GB1984-2003 China standard)
GBT11022-1999 China Standard
IEC 60255-11
IEC 60255-21-1 Class I
IEC 60255-21-2 Class I
IEC 60255-21-3 Class I
IEC 60255-22-1 Class III
IEC 60255-22-2 Class IV
IEC 60255-22-3 Class III
IEC 60255-22-4 Class IV
Using of the enviroment:
Ambient temperature:-40℃~+40℃, the daily average temperature:25℃;
Altitude:≤ 3000m（in excess of the value of technical discussions with the divisionI);
Wind speed：35m/s;
Earthquake intensity: not more than 8 degrees;
Degree of ambient air contamination level not greater than:III level;
Daily average ambient air relative humidity≤95%, on average≤90%;
Saturated vapor pressure of daily mean values≤ 2.2*10^(-3)MPa, on average≤1.8*10^(-3)MPa;
More about the use of environment conditions, please consult with the manufacturer.
Main technical specifications:
No. | Item | Unit | Data |
1 | Rated voltage | KV | 252 |
2 | Rated frequency | Hz | 50/60 |
3 | Rated current | A | 4000 |
4 | 1min power frequency withstand voltage | KV | 460 |
5 | Lingthning impluse withstand voltage(peak value | KV | 325 |
7 | Rated short circuit breaking current | KA | 50 |
Rated peak withstand current | KA | 125 | |
8 | Rated out-of-phase breaking current | KA | 12.5 |
9 | Rated cable(line) charging breaking current(peak) | A | 160 |
10 | Rated gas pressure | MPa | 0.6 |
11 | Main loop resistance | uΩ | ≤60 |
12 | Operation sequence | O-0.3s-CO-180s-CO | |
13 | SF6 gas leakage rate(per year) | % | ≤1 |
14 | Moisture content(V/V) | ppm | ≤150 |
| 15 | Across the open contacts | mm | 7812 |
Creepage distance | |||
| TO earth | 7812 | ||
16 | Mechanical life | times | 10,000 |
Note: For short circuit breaking current & rated current is optional by clients.
Q:How to guarantee my order and payment.
A:Ezitown has Alibaba trade Assurance,100% refundable if any quality or
delivery problem.
Q:How to return the goods if meet any problem
A:we have DHL and Fedex account for return goods.buyer no need to pay
any shipping cost for returning. Can contact our salesman to operate.
Q:Why Ezitown price is competitive, and quality seems rather good ?
A:because we have been manufacturing more than 20 years, we know what
price and Quality buyer can sell well in market.the wholeseller have
suitable profits
Q:Can we order many items and make combine shipment.
A:we can combine many items,and deliver by courier/sea/land/air etc.
pack well.
Q:Can I order the cabinet/enclosure/box and the wiring material from
you or other supplier,you make wiring and assembly for us ?
A:we have egineering, wiring and assembly team for low voltage/medium
voltage/high voltage/DC control .can make drawing and diagram to
confirmation and proceed the assembly.we have unite nation project in
regular assembly.
Q:How can I make our own brand for my order
A:we supply OEM service if order quantity meet the OEM MOQ , contact to
know the exactly quantity for your item
Q:What is the delivery if I make payment
A:Almost all items we keep in stock.and we have many order every day ,
We need 1-3 working days to packing and make delivery.OEM packing will
be longer time.
Q:Can we visit your factory or office ?
A:we always welcome customer visit us, let me know the schedule, we
will arrange.
