GW4-126D Outdoor AC High-Voltage Isolating Switch
The GW4-126D double-column horizontal outdoor AC high-voltage disconnector is suitable for power systems with a frequency of 50 Hz and a rated voltage of 110 kV. It is used to switch high-voltage lines under no-load conditions and to provide electrical isolation between high-voltage busbars, circuit breakers, and other electrical equipment under maintenance and energized high-voltage lines, thereby ensuring that the equipment under maintenance and the maintenance personnel are provided with a visible insulation clearance that meets the required specifications.
Category:
High-voltage switchgear
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GW4-126D Outdoor AC High-Voltage Isolating Switch
The GW4-126D double-column horizontal outdoor AC high-voltage disconnector is suitable for power systems with a frequency of 50 Hz and a rated voltage of 110 kV. It is used to switch high-voltage lines under no-load conditions and to provide electrical isolation between high-voltage busbars, circuit breakers, and other electrical equipment under maintenance and energized high-voltage lines, thereby ensuring that the equipment under maintenance and the maintenance personnel are provided with a visible insulation clearance that meets the required standards.
Adopts a dual-column horizontal rotary structure;
Simple structure, easy commissioning, and aesthetically pleasing design;
The isolating switch can be operated as a single pole or, via interphase linkages, as a three-pole coordinated operation.
It features both electric and manual operation modes;
Features dual mechanical and electrical interlocks;
The components are predominantly made of aluminum alloy and undergo special anti-corrosion treatment, providing excellent outdoor corrosion resistance.
The conductive contact areas are silver-plated, and an anti-oxidation coating is applied to the silver-plated surface to prevent oxidation of the switch.
Serial Number | Name | Unit | Parameters |
1 | Rated voltage | kilovolt | 126 |
2 | Rated current | A | 630/1250/1600/2000 |
3 | Peak withstand current of isolating switches and earthing switches | kA | 63/80/100 |
4 | Short-time withstand current of isolating switches and earthing switches for 3 seconds | kA | 25/31.5/40 |
5 | Rated 1-min power-frequency withstand voltage | kilovolt | 230/265 |
6 | Rated Lightning Impulse Withstand Voltage | kilovolt | 550/630 |
7 | Closing and opening time | s | 8±1 |
8 | Control voltage | V | AC220 |
9 | Phase-to-phase center distance | mm | ≥2000 |
10 | Phase-to-phase insulation distance | mm | ≥1000 |
11 | Disconnector contact gap | mm | ≥1050 |
12 | Ground switch break distance | mm | ≥1000 |
13 | Insulation clearance between the conductive part and ground | mm | ≥910 |
14 | Out-of-phase closing and opening of the three phases of the isolating switch | mm | ≤12 |
15 | Out-of-phase closing and opening of the three phases of the earthing switch | mm | ≤15 |
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