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----OPEN GROUP HOLDING LTD. is located in Liushi, Wenzhou, Zhejiang Province, China. It faces the 104 National Highway that run-through Zhemin Economic Zone, close to Qili Harbor and Wenzhou Airport on the south, close to the scenic spot Yandang Mountain on the north.

Quality assurance and customer satisfaction lead Open Group's top belief. OPEN GROUP HOLDING LTD. is one of the most professional manufacturers producing low-voltage and high-voltage electrical products, power equipment, cables & wires, etc. Through last 10 years' development,OPEN GROUP HOLDING LTD. has grown up as one of the biggest group companies in China, and the products range includes lightings, and lamp. We have over fifty member factories for the products above, and our products include 1,500 series and more than 15,000 industrial components.

We have precious experiences in exporting our products to the Southeast Asian, Australian, European and the American markets. Our products are well-known greatly due to high quality and reasonable price. After more than 10 years' promotion and service in the world, our products are enjoying a great share in the international market.

To present our customer more considerate service, OPEN GROUP HOLDING LTD. has modernized our production equipment, enhanced production technology and management mode. To form designing, producing, quality checking, selling as an organic whole, from quality control of the input of the raw materials and feedback of the after-sale service, etc., we have introduced TQM and other advanced producing methods to ensure the interest of our customers.

The 21st century is the era of the knowledge economy, full of the fierce competitions of technology and managing mode, but meanwhile, we can tell that there are also so many opportunities to get mutual benefits. Welcome domestic and international friends to cooperate cordially with OPEN GROUP HOLDING LTD. We believe with our best efforts, we can create the prosperity and development for both of our business.

 
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  | Power Transmission & Distribution Equipment >>  Voltage vacuum circuit >> AC Outdoor HV Vacuum Breaker >> FZW20A-12
 
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Mostly purpose
FZW20A-12 type outdoor high-voltage boundary switch(hereinafter called breaker for short )is a three-phase 50HZ outdoor power distribution equipment with rated voltage of 12KV.Mainly used for breaking and closing of load current,overload current and short-circuit current,zero sequence current in electric power system,it is applied for protection and control of power distribution system in substation and industrial and mining enterpreise,especially for rural power network and places requiring frequent operation.This product is equipped with controller,for its control mechod:(1)FDR-01 palm computer,(2)FDR-02(GSM type),with single-phase earthing and short circuit protection functions,which meets the requirement of power distribution automatization,and can finish the owrk of traditional recolser reliably and effectively.
This installation and operation instruction contains contents of main technical parameter of circuit breaker,product structure,principle and method of installation,operation and maintenance,etc.

Type Meaning

Normal working environment
1.Ambient Air Terperature:-40 ℃~+40℃; daily temperature difference:25 ℃
2.Altitude:≤3000m;
3.Wind speed:≤35m/s;
4.The place where it is used is free from fire,explosion,chemical corrosion and intense vibration.
Technic Parameter
1.Technic Parameter(Table 1)
Item
Unit
Parameter
Rated voltage
KV
12
Rated frequency
HZ
50
Rated current
A
630、1000
Rated short circuit breaking current
KA
12.5、16、20、25
Rated peak &#118alue withstand current
KA
31.5、40、50、63
Rated chort time withstan current(4S)(Peak &#118alue)
KA
12.5、16、20、25
Rated short current switching current(Peak &#118alue)
KA
31.5、40、50、63
Mechanism life
Times
10000
Breaking current frequency under rated short circuit
Times
10000
Breaking current frequency under rated short circuit
Times
30
Power frequency withstand voltage(1min)interphase,to earth/fracture
KV
42/49
Lightning impulse withstand voltage(peak valu)interphase,to earth/fracture
KV
75/85
1 min power frequency withstand voltage of secondary circuit
KV
2

2. Mechanical Character Parameter
ITEM
UNIT
PARAMETER
contact opening
MM
8.5~10
contact overtravel
MM
2.5~4
switch off speed
M/S
1.2±0.2
switch on speed
M/S
0.6±0.2
contact closing bounce time
S
≤2
interphase center distance
MM
INNER:135±1.5,OUTER:275±2
external charged air insulation distance
MM
240±2
external creepage ratio
MM/KV
38
three-phase switching on-synchroneity
MS
≤2
loop resistance
цΩ
< 120
switch-on time
MS
≤45
switch-off time
MS
≤45
rated power of energy storage motor
W
≯40
rated voltage of energy storage motor
V
AC220
rated switching-on operating voltage
V
AC220
max./min.switching-on operating voltage
V
AC246/143
rated switching-off operating voltage
V
AC220
max./min.switching-off operating voltage
V
AC246/143
max./min.motor voltage
V
AC242/176
3、电压互感器、电流互感器配置
The operating power supply of this product adopts the low voltage power supply with AC220V(110)offered by user or directly adopts the secondary voltage with AC220V(110) which is output bu aerial line through voltage transformer(outer).It also could be built-in current transformer for self-over-current protection and the standard configuration is two sets.
Structure Character

1、Structue
The circult breaker composes of main body box with high-voltage system and operating components inside, operating mechanism box and hanger frame offering installation,fixation and moving(lifting),please see drawing 1for outline structure and installing size and drawing 2for inner structure.
2、Character
1)The vacuum arc-extinguishing circuit breaker has reliable breaking performance, it owns damp-proof and explosion safelysmall volume light weight and long service life.
2)The circult breaker adopts totally enclosed structure, with good sealing performance,it owns damp-proof and condensation resistant performance,so that is suitable for area with high remperature and high moisture.
3) Three-phase CT could be installed in the circult breaker,and the output three-phase current is offered to the intelligent controller for information analysis ,the transformation ratio of CT could be adjusted by connecting the terminal to corresponding terminal pedestal.
4)the switching on or off of circuit breaker could be operated manually or electrically with over-current prorection.
5)the operating mechanism is novol simple reliable and small,its mechanical life can reach 10000 times.
6)the whole operating mechanism composes of switching on spring energy storage system,over-current tripper,switching on/off coil manual on/off system ,auxiliary switch and energy storage indeication part,etc.
7)the circlt breaker could be either suspended on crossbeam by hanger or installed with sitting posture.

Externlity &Build in Dimension

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