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Year Established:2013

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  • 252-550KV SF6 circuit breaker

252-550KV SF6 circuit breaker

LW10B column type SF6 circuit breaker including 252kV, 363kV and 550kV products, are used for making and breaking normal current, fault current and changing over of circuit, so as to realize the control and protection of power system. Please contact us! Email:

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Email: liujing@mec.com.cn
Skype:liujingmec

 
General Description
LW10B column type SF6 circuit breaker including 252kV, 363kV and 550kV products, are used for making and breaking normal current, fault current and changing over of circuit, so as to realize the control and protection of power system.
Each pole of LW10B-252 circuit breaker has one break; LW10B-363 and LW10B-550 each consists of two breaks, whether including closing resistance or not is up to the requirement of different customers. For all of these three kinds of products, each pole is equipped with a hydraulic operation mechanism, which can make single pole operation and/or three pole electrically gang operation.
Complete and strict type tests have been done on these products, type test certificates have been  issued by CESI, Italy and KEMA in Holand.
 
Main Features
1. High technical data
LW10B SF6 circuit breakers own big breaking capacity and good insulation. The interrupt, designed with advanced technology, can break 50kV short circuit current 26 times continuously without maintenance. LW10B-363/550 circuit breaker was successfully conducted all capacity tests in CESI, Italy. LW0B-252 circuit breaker can break 50kV short circuit current and fault current without capacitor.
2. Module design in operation system
Valve system of the hydraulic mechanism adapts module integration design with a small volume, which not only remains such characteristics of hydraulic mechanism as quick action, stable performance, low noise and no wearing etc., but also effectively prevents oil leakage.
3. Interchangeable ability of components and spare parts
Main body of circuit breaker is directly erected on the top of hydraulic mechanism, and the interrupter is standardized, so components and spare parts of the same rating and construction inside interrupter are strictly interchangeable.
4. Mechanism
LW10Bserious of circuit breakers are equipped with three kinds of hydraulic mechanism for end users’ choice, i.e. CY hydraulic mechanism made by PG, CYT hydraulic mechanism made by Pinggao with hydraulic valves exported from BUCHER, Switzerland , the key component of ABB mechanism, and ABB mechanism exported from ABB, Switzerland. LW10B-252 Type with CY hydraulic mechanism and BUCHER CYT hydraulic mechanism. LW10B-363 Type with BUCHER CYT hydraulic mechanism. LW10B-550 Type with BUCHER CYT hydraulic mechanism and ABB HMB-8 mechanism.
5. Reliable secondary component
Terminal blocks are Weidmuller or Phenix make. Pin-type SF6 gas destiny relay is convenient for the user to observe circuit breaker’s operation.
 
 
Item
 
 
Unit
Technical Data
LW10-252 (CY/CYT)
LW10B-363
(CYT)
LW10B-550 (CYT/ABB)
Rated voltage
kV
252
363
550
Rated frequency
Hz
50
Rated current
A
3150,4000
Rated short circuit breaking current
kA
40/50
63
63
Rated short line fault breaking current
kA
36/45
56.7
56.7
Rated out of phase breaking current
kA
10/12.5
15.75
15.75
Rated peak withstand current
kA
100/125
160
160
Rated short circuit making current (peak)
kA
100/125
 
160
160
Rated short time withstand current
kA
40/50
63
63
Rated duration of short circuit
S
3
Rated line charging breaking current (r.m.s)
A
160
500
500
Breaking time of rated short circuit current
times
20
Mechanical endurance
times
5000/1000
Rated SF6 gas pressure at 20
Mpa
0.4/0.6
0.6
0.6
SF6 gas moisture content (Ex-work)
PPM
≤150
SF6 gas leakage rate (per year)
≤1
 
SF6 gas weight (per pole)
 
kg
6 (without closing resistance)/10(with closing resistance)
12 (without closing resistance)/15(with closing resistance
20 (without closing resistance)/25(with closing resistance
 
Circuit Breaker weight (per pole)
 
kg
1600 (without closing resistance)/1800(with closing resistance
2530 (without closing resistance)/3180(with closing resistance
2840(without closing resistance)/3800(with closing resistance)
Operation force for opening/closing
kN
76/38
130/60
130/60
 
Terminal load
Longitudinal
N
2250
1500
2800
Horizontal
N
1768
1000
2400
Vertical
N
1250
1250
 
 
 
 

Company Profile

Our  Group was established in the end of the year 1997. It covers a land area of 400,000㎡and a building area of 120,000㎡ in Dalian, P.R. China.Our Group has more than 1400 employees including 296 technicians and 45 experienced senior engineers.
Mainly Independently develops and manufactures 0.22-35KV Dry type Instrument Transformer, 35-220KV Oil-insulated and Gas-insulated Instrument Transformer, 10-40.5 Vacuum Switch and ≤220KV classes of Composite Insulation Arrester. The products sales network covers all over the country and capacity occupies about 15% of the national market. Part of our products are also exported to many countries and regions in Africa, Asia, Middle East, South America, etc. Presently
We owns 580 sets advanced production equipments and 168 sets precise test instruments to build a good platform for independ innovation. Every year, dozens of new products come out and over 30 products got national patent. Our Group has acquired different honorary titles more than 50 items. We are sincerely looking forward to co-operating with domestic and overseas friends.
 

MEC

 

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