LT Distribution Panels
Key Features of an LT Distribution Panel
| Feature | Description |
|---|---|
| Voltage Rating | Generally 415V AC, 3-phase, 4-wire system |
| Current Rating | Ranges from 100A to 6300A or more |
| Incoming Supply | From transformer, generator, or main panel |
| Outgoing Feeders | Circuit breakers or MCCBs to various subpanels or loads |
| Protection Devices | MCCBs, MCBs, ELCBs, RCDs, fuses, surge arrestors, etc. |
| Metering | Digital/analog energy meters, voltmeters, ammeters, PF meters, etc. |
| Busbar System | Copper or aluminum busbars rated for appropriate current |
| Enclosure | IP-rated (e.g., IP42, IP54, IP65) sheet metal cabinet with powder coating |
| Earthing | Proper earthing provision for safety |
| Standards Compliance | Follows IEC 61439, IS 8623, or relevant national/international standards |
Typical Components Inside an LT Panel
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Main Circuit Breaker – To isolate entire panel
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Distribution Breakers – MCBs/MCCBs for outgoing circuits
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Busbars – For power distribution
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Relays & Timers – For control and automation
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Current Transformers (CTs) – For metering and protection
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Energy Meters – Monitor energy usage
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Indicators – Phase indicators, voltmeters, ammeters, etc.
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Control Wiring – For operational logic and interlocks
Common Applications
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Industrial facilities
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Commercial buildings
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Hospitals
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Data centers
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Schools and universities
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Residential complexes (in main power room)
