Reliable High Voltage (HT) Line Changeover & LST Switching Equipment
National Power Industries is a trusted manufacturer, supplier, and exporter of high-grade HT Line Change Over Switches and LST (Line Switching Equipment) in India. Designed to meet strict electrical distribution demands, our changeover switches facilitate smooth, uninterrupted power transfer between multiple incoming HT lines without dropping loads or risking electrical hazards.
Engineered using high-conductivity copper contacts, heavy-duty hot-dip galvanized mild steel frames, and superior polymer or porcelain insulators, our HT Change Over Switches deliver optimal conductivity, low electrical resistance, and excellent weathering performance for outdoor installations across Gujarat and Pan-India.
Technical Specifications Of HT Line Change Over Switch
| Parameter | Standard Specification |
|---|---|
| Product Type | HT Line Change Over Switch / LST Switch |
| Rated Voltage Class | 11kV / 22kV / 33kV System Voltage |
| Rated Current Capacity | 200A, 400A, 630A, 800A, 1250A (Customized as required) |
| Frequency | 50 Hz |
| Operation Mechanism | Manual Gang-Operated / Motorized Option Available |
| Contact Material | High-Conductivity Electrolytic Copper with Silver Plating |
| Insulator Material | High Creepage Distance Polymer / Porcelain Insulators |
| Structure / Base Frame | Hot-Dip Galvanized Structural Mild Steel (IS 2629 / IS 4759) |
| Standard Compliance | IS 9921 / IEC 62271-102 Standards |
| Installation Type | Outdoor Substation & Pole Mounted HT Lines |
Salient Features of National Power HT Line Change Over Switches
- Safe Source Selection: Ensures seamless load transferring between primary feeder lines, secondary transformers, or standby DG sources under HT voltage.
- Heavy-Duty Hot-Dip Galvanization: Protects structural steel components against severe atmospheric corrosion, chemical exposure, and rust in coastal or industrial zones.
- High Dielectric & Insulation Strength: Equipped with high creepage-distance insulators to prevent electrical flashover during heavy rain or surge conditions.
- Self-Cleaning Copper Contacts: Knife-edge wiper contacts clear oxidation layers during operation, keeping contact resistance low and preventing overheating.
- Positive Mechanical Interlocking: Prevents simultaneous connection of two out-of-phase incoming HT power supplies, safeguarding operators and network transformers.
- Low Maintenance & Long Operating Life: Designed for smooth mechanical movement with minimal grease re-application needs over years of service.
Applications of HT Line LST & Changeover Switches
Our HT Line Change Over and LST Switches are widely deployed across high-voltage distribution networks throughout India for applications including:
- State Electricity Boards & Utility Distribution Grids
- Industrial Sub-stations & Manufacturing Plants
- Solar & Wind Power Plants Feeders
- Commercial High-Rise Infrastructure & Power Complexes
- Railway Traction Substations & Dedicated Freight Corridors
Why Buy HT Line Change Over Switches from National Power Industries?
At National Power Industries (Ahmedabad, Gujarat), we combine advanced manufacturing infrastructure, strict quality assurance checks, and skilled electrical engineering to build robust HT switchgears.
- Quality Assurance: Every changeover switch undergoes rigorous dimensional checks, insulation resistance tests, and mechanical operational testing before dispatch.
- Customized Design Capabilities: Tailored voltage ratings, mounting arrangements, and terminal connector setups built to exact site requirements.
- Pan-India Supply & Competitive Pricing: Direct-from-factory pricing with quick turnaround times and reliable logistics across India.
Get Best Quote for HT Line Change Over Switches in India
Looking for a high-quality 11kV, 22kV, or 33kV HT Line Changeover or LST Switch for your project?
Contact National Power Industries Today:
Location: Ahmedabad, Gujarat, India
Phone / WhatsApp: +91 98795 59725
Email: jayant1885@gmail.com
Request a Technical Quotation