Isolators
Power-Grid Switchgears Pvt. Ltd. is a manufacturer and supplier of Isolators. Earth switch can be easily installed on each pole at either end and interlocked mechanically the main switch. the auxiliary switches can be provided for man as well as for earth switch. Electrical interlock can be provided, Electrical motor drive mechanism complete with reduction gear and torque limiting safety features can also be provided, Air Break Switch Disconnectors are part of any overhead line network, providing crucial points of isolation., isolator switch is used to ensure that an electrical circuit is completely de-energized for service or maintenance. Such switches are often found in electrical distribution and industrial applications, where machinery must have its source of driving power removed for adjustment or repair. High-voltage isolation switches are used in electrical substations to allow isolation of apparatus such as circuit breakers, transformers, and transmission lines.
Power Grid Switchgear is one of the trusted manufacturers and suppliers of HT Line Isolators in India, offering reliable and durable isolation solutions for electrical transmission and distribution networks. Our HT Line Isolators are engineered to provide safe electrical isolation during maintenance, inspection, and repair work in substations, power distribution systems, industrial plants, renewable energy projects, and utility networks.
Manufactured using premium quality galvanized steel, electrolytic grade copper contacts, porcelain or polymer insulators, and corrosion-resistant hardware, our High Tension Line Isolators deliver excellent electrical performance even under harsh environmental conditions. Every product is designed according to applicable Indian and international standards and undergoes strict quality testing before dispatch.
We manufacture and supply HT Line Isolators suitable for various voltage ratings including 11kV, 22kV, 33kV, 66kV, 132kV and higher voltage applications. Our products are supplied across Gujarat, Maharashtra, Rajasthan, Madhya Pradesh, Uttar Pradesh, Karnataka, Tamil Nadu, Telangana, Andhra Pradesh, Punjab, Haryana and all major states of India.
An HT Line Isolator, also known as a High Tension Isolator or Disconnect Switch, is a mechanical switching device used to disconnect an electrical circuit after it has been de-energized. It creates a visible isolation gap, allowing maintenance personnel to work safely on electrical equipment without the risk of accidental energization.
Unlike a circuit breaker, an HT Line Isolator is not designed to interrupt fault current or load current. Instead, it is operated only after the circuit breaker has disconnected the electrical supply, making maintenance operations safer and more reliable.
| Voltage Rating | Application |
|---|---|
| 11kV HT Line Isolator | Distribution Networks |
| 22kV HT Line Isolator | Industrial Distribution |
| 33kV HT Line Isolator | Substations & Utility Networks |
| 66kV HT Line Isolator | Power Transmission |
| 132kV HT Line Isolator | High Voltage Substations |
Power Grid Switchgear manufactures HT Line Isolators with precision engineering to ensure reliable performance in demanding outdoor electrical environments. Our isolators are designed for long service life, low maintenance, and dependable operation in transmission and distribution networks. Each HT Line Isolator is tested for electrical, mechanical, and environmental performance before dispatch.
| Parameter | Specification |
|---|---|
| Product Name | HT Line Isolator / High Tension Isolator |
| Voltage Ratings | 11kV, 22kV, 33kV, 66kV, 132kV & Higher |
| Current Ratings | 400A, 630A, 800A, 1250A, 1600A, 2000A & Above |
| Installation Type | Outdoor |
| Mounting | Horizontal / Vertical |
| Operating Mechanism | Manual or Motorized |
| Insulator Type | Porcelain or Polymer |
| Contact Material | Silver Plated Electrolytic Copper |
| Structure Material | Hot Dip Galvanized Steel |
| Surface Finish | Hot Dip Galvanized |
| Operating Temperature | Suitable for Indian Climatic Conditions |
| Standards | IS / IEC Compliant |
Centre Break HT Line Isolators are among the most widely used disconnect switches in outdoor substations. They provide a clearly visible isolation gap and ensure safe maintenance of high-voltage electrical equipment. Their simple construction, reliable operation, and low maintenance requirements make them suitable for transmission and distribution applications.
Double Break Isolators create two isolation gaps during operation, providing improved electrical clearance and enhanced operational safety. These isolators are commonly installed in utility substations and industrial power distribution systems where dependable isolation is essential.
Vertical Break Isolators are designed for installations where horizontal space is limited. Their vertical operating mechanism helps optimize substation layouts while maintaining excellent electrical isolation and mechanical reliability.
Pantograph Isolators are mainly used in extra high voltage substations. Their compact design allows efficient installation in limited spaces while ensuring excellent electrical performance and operational safety.
An HT Line Isolator operates only after the circuit breaker has interrupted the electrical load. Once the circuit is de-energized, the isolator is opened to create a visible air gap between live conductors. This visible isolation confirms that no electrical current is flowing, allowing maintenance personnel to safely inspect or repair the equipment.
After maintenance is completed, the isolator is closed first, followed by the circuit breaker to restore the electrical supply. This operating sequence helps protect equipment and ensures personnel safety.
| Feature | HT Line Isolator | Circuit Breaker |
|---|---|---|
| Interrupt Load Current | No | Yes |
| Visible Isolation | Yes | No |
| Maintenance Safety | Excellent | Requires Isolator |
| Fault Current Interruption | No | Yes |
| Primary Purpose | Electrical Isolation | Protection & Switching |
Every HT Line Isolator manufactured by Power Grid Switchgear undergoes rigorous inspection and testing to ensure dependable performance under Indian operating conditions. We focus on precision engineering, robust construction, and compliance with applicable quality standards so that our customers receive safe, durable, and high-performance isolation equipment for every application.
Selecting the right HT Line Isolator in India is essential for ensuring the safety, reliability, and efficiency of your electrical power system. Before purchasing an isolator, several technical factors should be evaluated to match the application requirements.
Power Grid Switchgear offers customized HT Line Isolators to meet the specific requirements of utilities, EPC contractors, industrial plants, and electrical infrastructure projects. Our engineering team can manufacture products according to customer specifications while maintaining high quality and performance standards.
Every HT Line Isolator is carefully packed to prevent damage during transportation. We ensure secure packaging, proper labeling, and timely dispatch to customers throughout India. Our logistics network enables fast and reliable delivery for government projects, utility companies, industries, and EPC contractors.
We regularly supply HT Line Isolators to Gujarat, Maharashtra, Rajasthan, Madhya Pradesh, Uttar Pradesh, Punjab, Haryana, Delhi, Karnataka, Tamil Nadu, Telangana, Andhra Pradesh, Odisha, Chhattisgarh, West Bengal, Bihar, Jharkhand, Kerala, Assam, and other states across India.
An HT Line Isolator is a mechanical switching device used to safely isolate high-voltage electrical equipment during maintenance. It provides a visible air gap after the circuit has been disconnected by the circuit breaker.
A Circuit Breaker interrupts load and fault currents, whereas an HT Line Isolator is used only for electrical isolation after the circuit has been de-energized. The isolator provides visible isolation for maintenance safety.
We manufacture HT Line Isolators for 11kV, 22kV, 33kV, 66kV, 132kV, and higher voltage applications as per customer requirements.
Yes. Our HT Line Isolators are specifically designed for outdoor installations and are manufactured using weather-resistant materials suitable for Indian climatic conditions.
Yes. We manufacture both manual and motor-operated HT Line Isolators depending on project specifications.
HT Line Isolators are widely used in substations, transmission lines, distribution networks, renewable energy projects, manufacturing industries, power plants, railway electrification, and utility infrastructure.
Our HT Line Isolators are manufactured using Hot Dip Galvanized Steel structures, silver-plated electrolytic copper contacts, high-quality porcelain or polymer insulators, stainless steel fasteners, and corrosion-resistant hardware.
Yes. Power Grid Switchgear supplies HT Line Isolators across all major cities and states in India with safe packaging and timely delivery.
Yes. We offer customized voltage ratings, current ratings, operating mechanisms, insulator types, mounting arrangements, and project-specific designs according to customer requirements.
Power Grid Switchgear is committed to delivering high-quality HT Line Isolators with reliable performance, competitive pricing, strict quality control, technical expertise, and prompt nationwide delivery. Our products are trusted by utilities, industries, EPC contractors, and infrastructure developers across India.
Looking for a reliable HT Line Isolator Manufacturer in India? Power Grid Switchgear offers premium-quality High Tension Line Isolators designed for long-lasting performance, safety, and dependable operation. Whether your requirement is for substations, industrial projects, transmission lines, or electrical distribution systems, we provide high-quality products backed by expert technical support and competitive pricing. Contact us today for product information, technical specifications, customized solutions, or a free quotation.
