An isolator switch (also called a disconnector) is a critical electrical protection device designed to provide a visible, physical break in an electrical circuit. Unlike circuit breakers, it does not interrupt fault currents—but delivers safe isolation of equipment from the power supply during maintenance, repairs, or emergencies. Compliant with IEC 60947-3, ANSI/IEEE C37.20.1, and GB standards, our isolator switches ensure operational safety and system reliability across low, medium, and high-voltage applications.
Key Features & Benefits
✅ Visible Break Point: Clear air gap design for easy verification of isolation, eliminating electrical hazards during maintenance.
✅ Robust Construction: Die-cast aluminum housing + stainless steel components, resistant to corrosion, dust, and extreme temperatures (-40°C to +70°C).
✅ Wide Voltage Compatibility: 120V–36kV rated voltage, 16A–6300A rated current, suitable for LV/MV/HV power systems.
✅ Easy Installation: DIN rail, panel, or wall-mounted options; compatible with standard electrical enclosures and switchgear.
✅ Long Service Life: 10,000+ mechanical operations; low contact resistance (μΩ) for stable performance.
Application Scenarios
Our isolator switches are trusted in diverse industries for safe circuit isolation:
- Power Grids & Substations: Isolate transformers, capacitors, and busbars during maintenance.
- Industrial Automation: Protect motors, PLCs, and production lines in manufacturing plants.
- Renewable Energy: DC isolators for solar (PV) systems, wind turbines, and energy storage.
- Commercial Buildings: Shopping malls, hospitals, and office complexes (HVAC, lighting, and power distribution).
- Marine & Offshore: Corrosion-resistant models for ships, oil rigs, and coastal infrastructure.
Why Choose Our Isolator Switch?
🔹 Safety First: Visible break design meets global safety standards, reducing workplace accidents.
🔹 Versatility: Customizable voltage/current ratings to fit your specific system requirements.
🔹 Durability: Weatherproof and shockproof construction for harsh operating environments.
🔹 Cost-Effective: Low maintenance + long lifespan, reducing total ownership costs.
🔹 Global Support: 24/7 technical assistance, fast delivery, and OEM/ODM services.
FAQ
Q: What’s the difference between an isolator switch and a circuit breaker?
A: An isolator switch provides a physical break for safe isolation (no fault-breaking capability), while a circuit breaker automatically interrupts overcurrent/short circuits. They are often used together in power systems.
Q: Can this isolator be used outdoors?
A: Yes—our IP65-rated models are dustproof and waterproof, suitable for outdoor substations, solar farms, and marine applications.
Q: What voltage rating do I need for a solar system?
A: For residential PV systems, choose 1000V DC isolators; commercial/utility-scale systems require 1500V DC models.
Get Your Custom Isolator Switch Solution
Contact our team to discuss your project requirements, request a quote, or download technical datasheets.
An isolator switch (also called a disconnector) is a critical electrical protection device designed to provide a visible, physical break in an electrical circuit. Unlike circuit breakers, it does not interrupt fault currents—but delivers safe isolation of equipment from the power supply during maintenance, repairs, or emergencies. Compliant with IEC 60947-3, ANSI/IEEE C37.20.1, and GB standards, our isolator switches ensure operational safety and system reliability across low, medium, and high-voltage applications.
Key Features & Benefits
✅ Visible Break Point: Clear air gap design for easy verification of isolation, eliminating electrical hazards during maintenance.
✅ Robust Construction: Die-cast aluminum housing + stainless steel components, resistant to corrosion, dust, and extreme temperatures (-40°C to +70°C).
✅ Wide Voltage Compatibility: 120V–36kV rated voltage, 16A–6300A rated current, suitable for LV/MV/HV power systems.
✅ Easy Installation: DIN rail, panel, or wall-mounted options; compatible with standard electrical enclosures and switchgear.
✅ Long Service Life: 10,000+ mechanical operations; low contact resistance (μΩ) for stable performance.
Application Scenarios
Our isolator switches are trusted in diverse industries for safe circuit isolation:
- Power Grids & Substations: Isolate transformers, capacitors, and busbars during maintenance.
- Industrial Automation: Protect motors, PLCs, and production lines in manufacturing plants.
- Renewable Energy: DC isolators for solar (PV) systems, wind turbines, and energy storage.
- Commercial Buildings: Shopping malls, hospitals, and office complexes (HVAC, lighting, and power distribution).
- Marine & Offshore: Corrosion-resistant models for ships, oil rigs, and coastal infrastructure.
Why Choose Our Isolator Switch?
🔹 Safety First: Visible break design meets global safety standards, reducing workplace accidents.
🔹 Versatility: Customizable voltage/current ratings to fit your specific system requirements.
🔹 Durability: Weatherproof and shockproof construction for harsh operating environments.
🔹 Cost-Effective: Low maintenance + long lifespan, reducing total ownership costs.
🔹 Global Support: 24/7 technical assistance, fast delivery, and OEM/ODM services.
FAQ
Q: What’s the difference between an isolator switch and a circuit breaker?
A: An isolator switch provides a physical break for safe isolation (no fault-breaking capability), while a circuit breaker automatically interrupts overcurrent/short circuits. They are often used together in power systems.
Q: Can this isolator be used outdoors?
A: Yes—our IP65-rated models are dustproof and waterproof, suitable for outdoor substations, solar farms, and marine applications.
Q: What voltage rating do I need for a solar system?
A: For residential PV systems, choose 1000V DC isolators; commercial/utility-scale systems require 1500V DC models.
Get Your Custom Isolator Switch Solution
Contact our team to discuss your project requirements, request a quote, or download technical datasheets.
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