Shenyang Xinxin Alliance Electric Co.,Ltd
GIS、Circuit & Parts
GIS, circuit breaker, disconnector & its parts
GIS, circuit breaker, disconnector & its parts
GW4—126
1.General Description

GW4G series disconnectors are outdoor 3-pole high voltage equipment. They are applied at no-load condition, to switch high voltage line and isolate electrically other electric equipmentneeding check or maintenance.
Compared with GW4 series, GW4G series is a new type of disconnector with great improvement to according to the conditions in the electric power supply system in China.
2.Main Features
2.1 Main electric system and grounding system used the vertical conductive material contacts
to overcome the shortcoming of carbon steel wire spring which easily torusty. Meanwhile fixed installation also refers to the phenomenon that movingcontacts trapped by dust and sand.
2.2  Bearing base used cast aluminum materials, and added rubber ring to its top and bottom to prevent flooded into the sand. Solve the problem that rusting and jammingof bearing.
2.3 In the manufacturing process, we use large quantities of aluminum castings. The remaining steel parts used the hot-dip zinc or “Dacromet” anti-rust technology, andsubstantially reduce welding, to maintain the appearance quality in the long-term.
 2.4For the convenience of customer, on-site installation of disconnectors can be connected using standard parts, needn’t welding.
3. Main technical Data
No
Item
Unit
Data
1
Rated voltage
kv
126
2
Rated current
A
630
1250
2000
3
Short-time current for main and earthing
contacts(3s)
kA
63
80
100
 
4
Peak current for main and earthing contacts
kA
25
31.5
40
 
 
5
 
 
1min power
frequency
withstand
voltage(r.ms)
 
To earh
Altitude: 1000m
KV
 
 
KV
 
185
Altitude:2000m
250
Between
phase
 
Altitude: 1000m
210
Altitude:2000m
265
 
 
6
Lighting
impulse
withstand
voltage (peak
1.2/50µs)
 
To earth
Altitude:1000m
KV
 
 
KV
460
Altitude:2000m
550
Between
phase
 
Altitude:1000m
550
Altitude:2000m
630
7
Creepage distance
Level Ⅱ
N
2520
Level Ⅲ
3150
Level Ⅳ
3906
8
Permissible load on wiring terminal
N
1000
9
Mechanical endurance
times
2000
10
Manual device operating force
N
≤200
11
Twisting force of porcelain insulator
Nm
2000
12
Bending force of porcelain insulator
N
6000
13
Operating device for main contact
 
CJ7A
14
Operating device for earthing contact
 
CS17
15
Weight of per pole
Kg
300
16
Weight of CS17 manual device
Kg
15
17
Disconnector circuit resistance
 
µΩ
 
≤200
≤150
≤80
18
Earthing switchgear circuit resistance
µΩ
 
≤270
≤270
≤270
19
CJ7A electric device
Opening time
s
6
Closing time
 
s
6
Weight
Kg
65
TECHNICAL PARAMETERS