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The Outdoor High Voltage Disconnect Switch is engineered for reliable circuit isolation in outdoor AC power systems ranging from 40.5kV up to 220kV. It is widely applied in substations, transmission lines, and grid switching stations where visible isolation and mechanical safety are required under high-voltage conditions.
This GW4 series is designed with a robust open-air structure, ensuring stable operation under harsh weather conditions such as heavy rain, ice, wind load, and pollution environments. It supports both manual and motorized operation modes, providing flexibility for different grid automation levels.
The switch adopts a horizontal rotary blade structure with porcelain post insulators, conductive tubes, and a high-strength galvanized steel base frame. The mechanical linkage system ensures synchronized three-phase operation, reducing misalignment risks during switching.
Compared with traditional isolators, this Outdoor High Voltage Disconnect Switch improves contact pressure uniformity and reduces oxidation at the conductive joints, significantly extending service life in long-term outdoor applications.
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Project Name |
Parameter value |
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Rated voltage |
40.5KV |
72.5KV |
126KV |
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Rated insulation level |
1-minute power frequency withstand voltage |
95/115 KV |
140/160 KV |
230/245KV |
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Lightning impulse withstand voltage |
185/215 KV |
325/375 KV |
550/630 KV |
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Rated frequency |
50 Hz |
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Rated current |
400/630/1000A |
1250/1600/2000A |
3150/4000A |
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Rated short-time withstand current |
16/20/31.5kA |
31.5/40kA |
50kA |
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Rated peak withstand current |
40/50/63kA |
80/100kA |
125kA |
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Rated short-circuit duration |
4/2s |
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Rated terminal mechanical load |
Horizontal longitudinal load |
750N |
1000N |
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Horizontal lateral load |
500N |
750N |
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Vertical force |
750N |
1000N |
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Mechanical life |
2000 times |
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Manually operated mechanism |
Without grounding |
CS11(F) |
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Single grounding |
CS 8-6D(F) |
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Double grounding |
Main cutter CS14G, ground cutter CS11 |
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Control circuit voltage |
AC 220/380,DC 220 |
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Motor-driven operating mechanism |
Model |
CJ5/CJ6 |
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Motor voltage |
AC220/380，DC220 |
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Control circuit voltage |
AC220，DC220 |
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Opening time (of the circuit breaker) |
6±1s |
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Product weight |
Not grounded |
360kg |
500kg |
700kg |
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Single grounding |
410kg |
600kg |
800kg |
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Double grounding |
460kg |
700kg |
900kg |
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GW4 Series Structural Overview
1. Base
2. Support insulator
3. Wire terminal
4. Stationary conductive tube
5. Square water cover
6. Movable conductive tube
Single Pole Configuration
1. Channel steel bracket
2. Support base
3. Insulating post
4. Right outlet terminal
5. Cylindrical end conductive rod
6. Rain cover
7. Contact conductive rod
8. Left outlet terminal
126kV High Voltage Structure
1. Grounding switch fixed contact
2. Contact guide rod
3. Stainless steel rain cover
4. Cylindrical conductive rod
5. Flexible connection terminal block
6. Insulating support
7. Bearing housing
8. Mounting base frame
9. Right grounding switch assembly
10. Grounding switch steel pipe
11. Grounding switch moving contact
12. Left grounding switch assembly
| Comparison Item | GW4 Series Outdoor High Voltage Disconnect Switch | Conventional Market Products |
| Structural Stability | Reinforced steel base with synchronized three-phase linkage | Independent phase operation with higher misalignment risk |
| Contact Performance | Optimized conductive tube with reduced oxidation resistance | Standard copper contact prone to long-term wear |
| Weather Resistance | Designed for rain, ice, wind, and pollution environments | Limited protection against harsh outdoor conditions |
| Operation Mode | Supports manual and motor-driven operation | Mostly manual-only systems |
| Maintenance Requirement | Low maintenance with long inspection intervals | Frequent maintenance required |
The Outdoor High Voltage Disconnect Switch is widely used in:
Proper alignment of the rotating shaft and insulator support structure is critical to ensure smooth mechanical operation. The base frame must be securely grounded, and the operating mechanism should be tested before energization to ensure safe switching performance under load-free conditions.
Q1: What is the main function of this Outdoor High Voltage Disconnect Switch?
It provides visible isolation of high-voltage circuits to ensure safe maintenance and system operation.
Q2: Can this switch operate under heavy outdoor weather conditions?
Yes, it is designed for extreme outdoor environments including pollution, rain, ice, and wind load conditions.
Q3: What makes the GW4 series different from standard isolators?
It offers improved mechanical synchronization, stronger corrosion resistance, and longer operational life compared to conventional models.
Q4: Is motorized operation available?
Yes, both manual and motor-driven mechanisms can be configured depending on project requirements.
Q5: What industries commonly use this equipment?
It is widely used in power transmission, substations, renewable energy systems, and heavy industrial electrical networks.
Address
Jinlu Industrial Zone, Beibaixiang Town, Yueqing City, Wenzhou City, Zhejiang Province, China
