The Leading Electrical Brand in China
The Leading Electrical Brand in China
Isolator switches provide reliable visible-break disconnection for securing electrical equipment and circuits for maintenance. Built to global standards with quality materials and manufacturing, GRL industrial isolator switches ensure high durability and safety. With a broad range of models, customization capabilities and strong customer support, GRL meets your isolation switch requirements. Contact our technical sales team today to select the right isolators for your application.
Isolator switches, also termed as safety disconnect switches, provide reliable electrical disconnection and isolation for industrial and utility applications. Isolator switches physically separate electrical circuits for maintenance activities and during faults.
Isolator switches have hinged or sliding contacts that create a visible air gap when opened. This allows complete disconnection of power downstream. Isolators are manually operated switches without any automatic tripping function.
Key applications of isolator switches include electrical panels, LV/MV switchgear, genset control, battery banks, solar farms, process lines, motors, transformers and capacitor banks. GRL manufactures heavy duty isolator switches suitable for global requirements.
There are several switch types and designs used for isolation duty:
General purpose switches with enclosed hinged blade contacts. UL 98 and IEC 60947 rated.
Heavy duty industrial switches with open blade contacts. Designed for frequent operation.
Insulated standoff designs for voltages from 7kV up to 800kV. Mounted on structures.
Combination isolation and overcurrent protection switch-fuse units for compactness.
Rotary cam, racking and draw-out isolators, earthing switches, belt drive operators etc.
GRL supplies isolator switches in all common configurations tailored for the application.
Key parameters that define isolator switch characteristics:
Maximum operating voltage, typically up to 1000V or 38kV.
Continuous and peak current carrying capacity from 100A to 3000A.
Single pole, 3 pole, off-load isolation designs etc. to suit needs.
IP65, IP66 protection against dust and water ingress.
Fuse holders, auxiliary contacts, operating handles, door interlocks etc.
GRL engineers help select appropriate ratings and features based on your electrical isolation needs.
Isolator switches provide key advantages that make them indispensable:
The open air gap ensures circuits are de-energized for safety.
De-energizing equipment for maintenance. Preventing unexpected restarts.
Switches built for thousands of operations with minimal maintenance.
Robust industrial grade construction withstands harsh conditions.
Fast opening action quenches arcs. Lower incident energy.
Isolators form an essential layer of protection, complementing modern power systems.
Isolators are designed, manufactured and tested to conform to international standards:
Designed as per low voltage switchgear standards.
Listed for North American requirements.
Verification of insulation withstand capability and limits.
Assessment of maximum switching voltage, current and frequency.
GRL isolator switches carry major global certifications for proven quality and reliability.
Key parameters guide selection of appropriate isolator switches:
Voltage class and load current must be within device ratings.
Outdoor/indoor duty and required ingress protection.
Single or multi-pole configurations to suit isolation needs.
Fuse holders, auxiliary contacts, limit switches etc.
Standard speed suffices for most applications.
Consult our technical team to select optimal isolator switches for your application.
To ensure longevity and performance:
Use compatible panels/structures. Follow manufacturer guides.
Check screw tightness. Use adequate wire sizes.
Allow safe operation, inspection and maintenance access.
Lubricate moving parts to prevent wear.
Test operation, insulation and continuity before reconnecting power.
Proper installation and upkeep improves isolator switch lifetime.
Isolating hazardous power warrants caution:
Wear arc flash clothing and face shield during isolation.
Use locks and tags at isolation points for safety.
Check switch contacts, test voltage and visual indicators to confirm deenergization.
Install safety symbols, warning signs and access barriers.
Follow rigorous safety protocols given the high fault current risks.
GRL provides durable and reliable isolator switches to suit wide-ranging requirements:
Reinforced insulation, copper alloy contacts and robust operating parts ensure longevity in tough conditions.
100% production testing guarantees electrical integrity and performance per standards.
Designed for frequent operation, our isolators ensure years of trouble-free disconnection.
We tailor isolator configurations, ratings, enclosures and accessories to your technical needs.
Competitive pricing with short lead times and global delivery for your isolation switch needs.
Trust GRL isolators for efficient and safe power distribution in your facility.
Isolator switches create a visible break in an electrical circuit to enable working safely on de-energized downstream equipment. They provide isolation but no automatic overcurrent protection.
Isolator switches safely isolate electrical equipment like transformers, capacitors and busbars for maintenance activities. They also disconnect faults downstream.
Common isolator switch types include knife switches, disconnect switches, high voltage isolators, fused switches, rotary cam switches, emergency stop switches etc.
Typical applications include electrical switchgear, motor controls, gensets, battery banks, capacitor banks, solar farms, electrical panels, equipment isolation etc.
Isolator switches are designed for low voltage up to 1000V and medium voltage ranges from 3kV to 38kV. High voltage isolators go up to 800kV.
Key specifications are voltage class, current rating, number of switched poles, enclosure type, isolation distance, accessories like auxiliary contacts etc.
Benefits include visible isolation, safety during maintenance, flexibility, robustness, reduced arc flash risks, and reliable disconnection.
Isolators are manually operated switches without overcurrent tripping capability unlike circuit breakers with magnetic/thermal tripping.
Major standards include IEC 60947, IEC 62271, UL 98, UL 508, and CSA C22.2 No.14 for isolator switch design, testing and certification.
Consider the load current, system voltage, number of poles, enclosure type, accessories, operating speed and certifications required when selecting the isolator.
Motorized operators can be coupled to allow remote electrical or automated operation of isolator switches, while manual operation is still possible.
Isolators require adequate panel space, proper mounting arrangement and hardware, correct torque on connections, and grounding as per manufacturer instructions during installation.
Follow lockout/tagout procedures, wear PPE, properly earth switches, test for deenergization before maintenance, and regularly lubricate/inspect isolators.
Warning signs, access restrictions, PPE, lockable operating handles, properly rated enclosure, testing before reenergization and redundancies safeguard isolator use.
Testing involves insulation resistance measurement, contact resistance test, operational/mechanical function check and verifying appropriate dielectric withstand capability.
Major industrial isolator switch brands include GRL, Schneider Electric, Siemens, ABB, Eaton, GE, Rockwell, L&T, Havells and C&S Electric.
Isolator switches can be purchased directly from manufacturers like GRL, from electrical equipment distributors, online retail platforms and via component sourcing firms.
Yes, most vendors offer customized isolator switches with ratings, poles, enclosure types and accessories tailored to your specific application requirements.
Manufacturers provide pre-sales technical assistance, product installation guidance, operations manual, maintenance advice and after-sales support on isolator switches.
Isolators allow deenergizing circuits for maintenance safely. Lockable handles and proper accessories prevent accidental reenergization enhancing safety.
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