Switchgear & Panels
Isolators, Air Break Switches, Horn Gap Fuses, and LT/HT electrical panels—manufactured for reliable performance in medium-voltage distribution and industrial applications.
Isolator
Isolators (disconnect switches) isolate equipment or circuits during maintenance under no-load conditions and provide visible isolation in substations and distribution networks. We manufacture isolators for 11 kV, 22 kV, and 33 kV systems for reliable outdoor performance.
| Particulars | For Mains | For Earth |
|---|---|---|
| Rated Voltage | 11 kV, 22 kV, 33 kV | 11 kV, 22 kV, 33 kV |
| Highest System Voltage | 12 kV, 24 kV, 36 kV | 12 kV, 24 kV, 36 kV |
| Current Rating | 400A, 630A, 800A | 400A, 630A, 800A |
| Type | 1) Banging Type 2) Turn & Twist Type 3) Horizontal Double Break (HDB) 4) Vertical Single Break (VSB) 5) Horizontal Single Break (HSB) 6) HDB with UNDERHUNG | Banging Type |
| STC Value | 1) 11 kV – 13.1 kA for 3 seconds 2) 33 kV – 31.5 kA for 3 seconds | 1) 11 kV – 13.1 kA for 3 seconds 2) 33 kV – 26.5 kA for 3 seconds |
Operating Mechanism: Motorized Operating, Manual Reduction Gear Operating, Manual Operating (as per customer requirements)
Support Structure: Pipe type structure & Lattice / channel type structure (as per customer requirements)
Insulator Creepage: Normal Creepage (25 mm/kV) OR Higher Creepage (31 mm/kV) (as per customer requirements)
Testing Approval
Tests carried out at Electrical Research & Development Association, Vadodara with IS-9921 (Part I to V) / IEC-60129 / IEC-62271-102:
- Short Time Current test for mains & earth switch
- Temperature Rise test
- Lightning Impulse Voltage Withstand test
- Dry Power Frequency Voltage Withstand test
- Wet Power Frequency Voltage Withstand test
- Mechanical Endurance test
- RIV Corona test
- Seismic test
- All type of AL Terminal Connectors are type tested
Features
- Sturdy construction
- Consistency in contact pressure and contact resistance over a long period
- Adjustable horn bars for engagement and disengagement of moving blade with fixed contact
- Withstand high static loads without deflection
- Individual stopper for alignment of moving blade with fixed contact on each phase
- Environmental protection for mechanism via a "closed canopy" encapsulating the turn & twist mechanism against rain, snow, dust, and foreign material
- Smooth operation for both banging and turn & twist designs
- Copper pipe for turn & twist movement with brass bushes acting as self-lubricant for smooth movement
Manual Operating Mechanism
- Operating handle with insulation (heat shrink for isolators; PVC sleeves for AB switches)
- Operating boxes IP-55 / IP-67, MS / AL / SS sheet (powder coated / painted)
- Interlocking arrangement
- Safety locks for mains and earth in open and close positions alternately
Motorized Operating Mechanism
- Motor and reduction worm gear coupled for higher output torque
- Overload protection
- Remote control optional
- Certified auxiliary switches
- Operating boxes IP-55 / IP-67; interlocking; safety locks as above
Both isolator mains and earth switch share a single operating mechanism design philosophy; common mechanisms can incorporate tandem pipe for all three phases. Installation is supported with guides for safe, fast erection without specialized tools. We also provide installation, erection, and retrofitting maintenance as required.
Air Break Switch (AB Switch) & Horn Gap Fuse
Air Break Switches and Horn Gap Fuses are critical in medium voltage distribution for safe isolation and reliable protection—designed for 11 kV, 22 kV, and 33 kV systems under outdoor and adverse conditions.
Air Break Switch (AB Switch)
Off-load switching devices to isolate circuits for maintenance and operational safety—widely used on overhead distribution lines and substations.
- Voltage Class: 11 kV, 22 kV, 33 kV
- Current Ratings: 400 Amp, 630 Amp, 800 Amp
- Type: Gang Operated Air Break Switch (GOAB); Vertical Break / Horizontal Break
Key Features
- Heavy-duty, weatherproof construction
- High conductivity silver-plated contacts
- Smooth and synchronized gang operation
- Corrosion-resistant galvanized structure
- Long mechanical and electrical life
- Suitable for harsh outdoor environments
Construction includes porcelain/polymer insulators, GI channel structure, arcing horns, operating pipe with handle/gearbox, and precision bearings. Testing covers routine tests (mechanical operation, alignment, contact resistance, inspection) and type tests (HV withstand dry/wet, lightning impulse, short-time current, temperature rise) with special tests on request (salt spray, galvanization thickness, load simulation).
Horn Gap Fuse (HG Fuse)
Protective devices for transformers and distribution lines against overcurrent and short circuits; arc elongation and extinction through horn-shaped electrodes.
- Voltage Class: 11 kV, 22 kV, 33 kV
- Current Rating: Based on fuse wire selection (customized as per application)
- Cost-effective protection, fast fault clearing, efficient arc extinction, outdoor suitability, easy replacement
Electrical Panels & Distribution Boxes (LT & HT)
LT and HT panels & distribution boxes for safe power distribution, control, and protection—meeting industrial, commercial, and utility requirements.
Low Tension (LT) Panels & Distribution Boxes
Product Range
- LT 25 / 100 / 200 KVA Distribution Box
- LT Mini Feeder Pillar
- LT 4 Way / 6 Way / 8 Way Feeder Pillar
Technical Specifications
- Voltage & Frequency: Up to 415 V, 50 Hz
- Current Rating: Up to 3200 Amps
- Protection: ACB / MCCB / MCB, RCCB / ELCB, HRC Fuses, SPD
- Construction: CRCA enclosure, powder-coated, copper/aluminium busbar, IP42 / IP54 / IP65
High Tension (HT) Panels & Distribution Systems
Product Range
- VCB Panels
- HT Switchgear Panels
- Ring Main Units (RMU)
- Outdoor / Indoor HT Panels
- HT Metering Panels
- Voltage Class: 11 / 22 / 33 kV
- Current Rating: 630 / 1250 / 2000 Amp (as required)
- Breaking Capacity: Up to 25 kA / 31.5 kA
- Protection & Control: Numerical relays, optional SCADA
- Metal-clad compartmentalized design, vacuum CBs, draw-out/fixed options
Testing & Standards
Routine: visual & dimensional inspection, functional operation, insulation resistance, high voltage withstand.
Type: short circuit withstand, temperature rise, IP test, mechanical endurance.
Standards: IS 8623 / IS 732 (LT), IEC 61439, IS / IEC 62271 (HT).
Quality & Standards
Manufacturing follows strict quality control; products are tested as per IS/IEC requirements with type testing support at recognized laboratories where applicable.
IS / IEC aligned
Type tested components
Project support
Need a project-specific switchgear package?
Contact our team with voltage level, ratings, and drawings—we’ll align materials and testing to your specification.