Reliable Electrical Switchgear Solutions
CPRI type-tested air-break isolators, switches, drop-out and horn-gap fuses and disconnector structures from 11 kV to 245 kV — engineered for safety, performance and decades of dependable service.
Four decades of trusted power equipment
Since 1981, PLA Ensol Private Limited — formerly Power Line Accessories — has manufactured electrical isolators, switches and fuses for India's power sector. From early CPRI-tested isolators for state boards to modern disconnector assemblies up to 245 kV, ENSOL pairs disciplined engineering with in-house manufacturing.
Operating from Raipur under an ISO 9001:2015 system, we supply utilities, EPC contractors and infrastructure developers with equipment built to last.
Electrical equipment & switchgear
Air Break Isolators
Pressure-relieving rotating-type isolators with hard-drawn electrolytic copper contacts, supplied with operating mechanisms.
Air Break Switches
Single-break AB switches — horizontal and vertical, rocking and rotating types — tailor-made to specification.
Drop Out Fuses
Channel-based DO fuses with stack-post or solid-core insulators for dependable transformer protection.
Horn Gap Fuse Units
Horn gap fuse units up to 145 kV for line and transformer protection.
Disconnector Structures
Precision disconnector structures and assemblies engineered for reliable mechanical performance.
Operating Mechanisms
Motorised, geared-manual and lever-type operating mechanisms matched to each isolator.
Substation Structures
Lattice and pipe-type gantries and equipment supports to strict EPC and utility standards.
Distribution Structures
V cross-arms, slotted channels, two-pole cross-arms and clamps for distribution networks.
A closer look
Air Break Isolators
| Voltage class | 11 kV – 245 kV |
|---|---|
| Current | 200 A – 2500 A |
| Short-time rating | 16 kA/1s – 40 kA/3s |
| Standards | IS 9921 & 9920, IEC-129 |
| Type test | NABL accredited labs |
- Substations & switchyards
- Transmission & grid isolation
- Utility & EPC projects
- Pressure-relieving rotating type
- Copper contacts for low loss
- Motorised or manual operation
Switchgear you can rely on
CPRI Type-Tested
Isolators and disconnectors type-tested for short-time and peak withstand current.
Premium Components
Hard-drawn electrolytic copper contacts and quality insulators throughout.
Standards Compliant
Built to IS 9921/9920, IEC-129 and IS 9385 for switchgear and fuses.
45+ Years Experience
Manufacturing isolators since 1981, trusted by boards and EPCs nationwide.
In-house Manufacturing
Structures and equipment under one ISO 9001:2015 controlled system.
Full Test Facilities
NABL-calibrated routine and acceptance testing at every stage.
Certified Quality
ISO 9001:2015 and MSME ZED — from raw material to dispatch.
Dependable Delivery
Proven high-volume execution for utilities and EPC contractors.
Powering critical infrastructure
State Utilities & Boards
Isolators, switches and fuses supplied to electricity boards across India.
EPC Contractors
Equipment and structures for turnkey transmission and distribution projects.
Power Plants
Switchyard isolators and equipment supports for generation sites.
Solar Plants
Evacuation switchyards and BOS for solar generation.
Distribution Networks
DO fuses, AB switches and structures for last-mile power delivery.
Railways
Railway electrification structures and fittings.
Infrastructure
Substation gantries and equipment for infrastructure projects.
Industrial Plants
Reliable isolation and protection for heavy industry.
Engineered, tested, delivered
Engineering
Requirements engineered to utility and EPC standards.
Design
Detailed and part drawings approved with the customer.
Material Selection
IS-grade steel, copper and insulators verified.
Fabrication
CNC cutting and fabrication under controlled process.
Assembly
Contacts, mechanisms and structures assembled.
Quality Inspection
Dimensional and process checks with traceability.
Testing
Routine and type tests at CPRI / NABL facilities.
Dispatch
Marked, documented and dispatched for site.
Scroll horizontally to follow the process →
Range at a glance
| Product | Voltage | Current | Short-time | Standards | Applications |
|---|---|---|---|---|---|
| Air Break Isolator | 11–245 kV | 200–2500 A | 16 kA/1s – 40 kA/3s | IS 9921/9920, IEC-129 | Substations, switchyards |
| Air Break Switch | 11–36 kV | 200–600 A | 16 kA/1s – 25 kA/3s | IS 9921/9920, IEC-129 | Distribution networks |
| Drop Out Fuse | 11–33 kV | 50–200 A | 8 kA asymmetrical | IS 9385 | Transformer protection |
| Horn Gap Fuse | Up to 145 kV | — | — | Utility approved | Line & transformer protection |
| Substation Structure | 33–765 kV | — | — | EPC / utility approved | Substation gantries & supports |
| Distribution Structure | 11–66 kV | — | — | Utility approved | Distribution networks |
Specifications are indicative and confirmed per project. Type-tested at CPRI / NABL-accredited laboratories.
Independently verified
Switchgear, answered
Installation, testing, customisation, compliance and delivery.
Yes. ENSOL isolators and disconnectors are type-tested at CPRI / NABL-accredited laboratories for short-time and peak withstand current, in line with IS 9921/9920 and IEC-129.
Air-break isolators from 11 kV to 245 kV and 200 A to 2500 A; air-break switches 11–36 kV; drop-out fuses 11–33 kV; and horn-gap fuse units up to 145 kV.
Yes. Air-break switches and isolators are tailor-made to customer specification, including horizontal/vertical and rocking/rotating types, with stack-post or solid-core insulators.
Isolators and switches to IS 9921 & 9920 and IEC-129; drop-out fuses to IS 9385; structures to relevant EPC and utility standards.
Hot-dip galvanising — 86 microns standard and 130 microns for marine environments — with NABL-accredited galvanising tests.
In-house NABL-calibrated facilities for HV, temperature-rise, millivolt-drop, mechanical operation, tensile, compression and coating-thickness testing, with type tests at CPRI.
With 45+ years of manufacturing and 500+ projects delivered, ENSOL executes high-volume orders for utilities and EPC contractors on dependable timelines.
Yes. ENSOL is an approved vendor for CSPDCL, POWERGRID (MQP), Maharashtra Discom, J&K and others, with a long record of board supplies.
Depending on the coating system, hot-dip galvanised structures carry guarantees of up to 25 years.
Use the Request a Quote button or contact our Power T&D team — we respond with drawings, specifications and pricing for your requirement.
Supplied to leading utilities, EPCs and corporates
Named clients and partners from ENSOL's supply record — including state electricity boards and EPC contractors.
Looking for Reliable Switchgear Solutions?
Talk to our Power T&D team for drawings, specifications and pricing. +91 99775 33990 · business@powerensol.com