Optimized Product Description:
The GW4 Series represents a state-of-the-art line of Outdoor 110kV Disconnector Switches, engineered for superior reliability and minimal maintenance. Developed in response to industry advancements and based on extensive nationwide research—including insights from numerous power supply bureaus, substations, and operations personnel—this disconnector is designed to meet modern demands for durable, high-performance switching equipment.
This Copper/Porcelain 110kV Disconnector Switch ensures safe and efficient isolation in high-voltage AC systems, emphasizing a maintenance-light and maintenance-free design where applicable.
Compliance & Standards:
The GW4 110kV Switch complies fully with:
GB1985-2004 (High-voltage Alternating Disconnecting Switches and Earthing Switches)
IEC 62271-102:2002 (AC Disconnecting Switches and Earthing Switches)
IEC 60694:1996 (Common Specifications for High-voltage Switchgear and Controlgear)
Ambient Operating Conditions:
Altitude: 1000m to 3000m
Ambient Temperature: -30°C to +40°C (-40°C in alpine regions)
Wind Speed: ≤ 34 m/s
Seismic Resistance: ≤ 8 degrees
Pollution Level: Air pollution grade IV
Ice Thickness: ≤ 10 mm
Installation Site: Must be free from flammable, explosive materials, chemical corrosion, and severe vibration
Post Insulator Pollution Class: Class 0 (General Type) / Class 2 (Pollution Resistant Type)
Ideal for outdoor substations and transmission applications, the GW4 Outdoor 110kV Disconnector offers robust construction, exceptional environmental adaptability, and long-term operational reliability.
| Type | GW4-110 | GW4-110G | |
| Rated voltage kV | 110 | 110 | |
| Rated current A | 630 1250 | 630 1250 | |
| 2000 2500 | |||
| Short time withstand current ( rms) kA | 20 31.5 | 20 31.5 | |
| 40(46) | |||
| Peak withstand current ( peak ) kA | 50 80 | 50 80 | |
| 100(104) | |||
| Rated short-time power frequence withstand voltage ( rms ) kV | to each | 185 | 185 |
| -230 | |||
| between breaks | 210 | 210 | |
| -265 | |||
| Lighting impulse withstand voltage ( peak ) kV | to each | 450 | 450 |
| -550 | |||
| between breaks | 520 | 550 | |
| -630 | |||
| Horzontal force of terminal N | 1000 | 1000 | |





