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GW7-126
Fenarro
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The GW7-126 disconnector is intended for use in three-phase AC 50Hz, 220kV power systems to switch lines under no-load conditions and to isolate equipment for maintenance. The product complies with GB1985 and IEC62271-102 standards. Key environmental and operating conditions include altitude ≤ 2000 m, ambient temperature range -40°C to +40°C, maximum wind speed 34 m/s, seismic resistance with horizontal acceleration 0.25g and vertical acceleration 0.125g, ice coating thickness ≤ 10 mm, and insulator pollution levels III (25 mm/kV) or IV (31 mm/kV). The installation site should be free of flammable, explosive or chemically corrosive substances and not subject to frequent, severe vibration.
Large visible contact gap and excellent dielectric performance to ensure safe maintenance clearance.
Simple and robust structure for easy installation, adjustment and long-term stability.
Flipping contact design yields high contact pressure after operation for superior current carrying capacity.
Self-cleaning contacts and contact fingers reduce contamination and maintenance costs.
Stable overall construction with high mechanical strength.
Hot-dip galvanized surface treatment provides excellent corrosion resistance for long outdoor service life.
Available in non-grounded, single-grounded and double-grounded configurations; compatible with manual or motorized operating mechanisms.
Optional earthing switch with reliable mechanical interlock to prevent incorrect operations.
| Item | Unit | Parameter | ||
|---|---|---|---|---|
| Rated Voltage | kV | 126 | ||
| Rated Current | A | 5000 | ||
| Rated Peak Withstand Current (Peak Value) | kA | 160 | ||
| 3s Rated Short - time Withstand Current (RMS Value) | kA | 63 | ||
| Rated Frequency | Hz | 50 | ||
| Earthing Switch | Rated Peak Withstand Current (Peak Value) | kA | 160 | |
| 3s Rated Short - time Withstand Current (RMS Value) | kA | 63 | ||
| Rated Tensile Force of Terminal | Longitudinal | N | 1500 | |
| Lateral | N | 1000 | ||
| Vertical | N | 1250 | ||
| Rated Insulation Level | Rated Short - time Power Frequency Withstand Voltage\(RMS Value) | To Ground | kV | 460 |
| Across Contacts | kV | 460 + 145 | ||
| Lightning Impulse Withstand Voltage\(Peak Value) | To Ground | kV | 1050 | |
| Across Contacts | kV | 1050 + 200 | ||
| Inductive Current Making and Breaking\Capability Test of Earthing Switch | Electromagnetic Coupling | Rated Inductive Current | A | 80 |
| Rated Inductive Voltage | kV | 2 | ||
| Electrostatic Coupling | Rated Inductive Current | A | 3 | |
| Rated Inductive Voltage | kV | 12 | ||
| Creepage Distance Ratio\of Post Insulator | Class III | mm/kV | 25 | |
| Class IV | mm/kV | 31 | ||
| Mechanical Life | times | 3000 | ||
| Loop Resistance of Disconnector | Ω | 50 | ||
| Busbar Transfer Current Making and Breaking | A | 1600 | ||
| Weight of Single Pole | kg | 1020 | ||
• Outdoor substations and high-voltage transmission lines.
• Isolation of busbars, transformers and circuit breakers during maintenance.
• Switching and rerouting of overhead transmission lines under no-load conditions.
• Situations requiring visible insulation distance to ensure safety of maintenance personnel.
Product model and configuration (e.g., GW7-126, non-grounded / single-grounded / double-grounded).
Rated electrical parameters: rated voltage, rated current, short-time withstand current, peak withstand current.
Operating environment: altitude, ambient temperature range, pollution level, seismic requirements.
Preferred operating mechanism: manual (CS series) or motorized (CJ series), and drive orientation.
Requirement for earthing switch and mechanical interlocks.
Mounting accessories or brackets, installation height and foundation details.
Required spare parts, tools or special accessories (if any).
Primary terminal connection direction and any special wiring requirements.
Fenarro (fenarro.com) is a professional manufacturer of high-voltage switchgear and power transmission equipment. We provide a full range of disconnectors, isolators, circuit breakers and custom switchgear solutions with rigorous quality control and global support. Fenarro products are engineered for reliability, safety and long-term operation in demanding power system environments.
The GW7-126 disconnector is intended for use in three-phase AC 50Hz, 220kV power systems to switch lines under no-load conditions and to isolate equipment for maintenance. The product complies with GB1985 and IEC62271-102 standards. Key environmental and operating conditions include altitude ≤ 2000 m, ambient temperature range -40°C to +40°C, maximum wind speed 34 m/s, seismic resistance with horizontal acceleration 0.25g and vertical acceleration 0.125g, ice coating thickness ≤ 10 mm, and insulator pollution levels III (25 mm/kV) or IV (31 mm/kV). The installation site should be free of flammable, explosive or chemically corrosive substances and not subject to frequent, severe vibration.
Large visible contact gap and excellent dielectric performance to ensure safe maintenance clearance.
Simple and robust structure for easy installation, adjustment and long-term stability.
Flipping contact design yields high contact pressure after operation for superior current carrying capacity.
Self-cleaning contacts and contact fingers reduce contamination and maintenance costs.
Stable overall construction with high mechanical strength.
Hot-dip galvanized surface treatment provides excellent corrosion resistance for long outdoor service life.
Available in non-grounded, single-grounded and double-grounded configurations; compatible with manual or motorized operating mechanisms.
Optional earthing switch with reliable mechanical interlock to prevent incorrect operations.
| Item | Unit | Parameter | ||
|---|---|---|---|---|
| Rated Voltage | kV | 126 | ||
| Rated Current | A | 5000 | ||
| Rated Peak Withstand Current (Peak Value) | kA | 160 | ||
| 3s Rated Short - time Withstand Current (RMS Value) | kA | 63 | ||
| Rated Frequency | Hz | 50 | ||
| Earthing Switch | Rated Peak Withstand Current (Peak Value) | kA | 160 | |
| 3s Rated Short - time Withstand Current (RMS Value) | kA | 63 | ||
| Rated Tensile Force of Terminal | Longitudinal | N | 1500 | |
| Lateral | N | 1000 | ||
| Vertical | N | 1250 | ||
| Rated Insulation Level | Rated Short - time Power Frequency Withstand Voltage\(RMS Value) | To Ground | kV | 460 |
| Across Contacts | kV | 460 + 145 | ||
| Lightning Impulse Withstand Voltage\(Peak Value) | To Ground | kV | 1050 | |
| Across Contacts | kV | 1050 + 200 | ||
| Inductive Current Making and Breaking\Capability Test of Earthing Switch | Electromagnetic Coupling | Rated Inductive Current | A | 80 |
| Rated Inductive Voltage | kV | 2 | ||
| Electrostatic Coupling | Rated Inductive Current | A | 3 | |
| Rated Inductive Voltage | kV | 12 | ||
| Creepage Distance Ratio\of Post Insulator | Class III | mm/kV | 25 | |
| Class IV | mm/kV | 31 | ||
| Mechanical Life | times | 3000 | ||
| Loop Resistance of Disconnector | Ω | 50 | ||
| Busbar Transfer Current Making and Breaking | A | 1600 | ||
| Weight of Single Pole | kg | 1020 | ||
• Outdoor substations and high-voltage transmission lines.
• Isolation of busbars, transformers and circuit breakers during maintenance.
• Switching and rerouting of overhead transmission lines under no-load conditions.
• Situations requiring visible insulation distance to ensure safety of maintenance personnel.
Product model and configuration (e.g., GW7-126, non-grounded / single-grounded / double-grounded).
Rated electrical parameters: rated voltage, rated current, short-time withstand current, peak withstand current.
Operating environment: altitude, ambient temperature range, pollution level, seismic requirements.
Preferred operating mechanism: manual (CS series) or motorized (CJ series), and drive orientation.
Requirement for earthing switch and mechanical interlocks.
Mounting accessories or brackets, installation height and foundation details.
Required spare parts, tools or special accessories (if any).
Primary terminal connection direction and any special wiring requirements.
Fenarro (fenarro.com) is a professional manufacturer of high-voltage switchgear and power transmission equipment. We provide a full range of disconnectors, isolators, circuit breakers and custom switchgear solutions with rigorous quality control and global support. Fenarro products are engineered for reliability, safety and long-term operation in demanding power system environments.
