A switch used to isolate electrical equipment for maintenance after the circuit has been de-energized.
Disconnect switches provide visible electrical isolation for transformers, circuit breakers, and transmission lines. They are not intended to interrupt load current but ensure safe maintenance conditions.
Common Features
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Visible isolation gap
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Manual or motorized operation
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Outdoor weatherproof design
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High-voltage insulation
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Robust construction
Common Use
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Equipment isolation
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Maintenance safety
Common Types
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Center-Break Isolator
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Double-Break Isolator
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Pantograph Isolator
Advantages
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Improves maintenance safety
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Simple construction
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High reliability
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Low maintenance
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Long operating life
Common Applications
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Transmission substations
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Switching yards
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High-voltage lines
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Transformer bays
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Utility substations
