# Difference between High Tension and Low Tension Panels

**URL:** <https://forumautomation.com/t/difference-between-high-tension-and-low-tension-panels/14345>\
**Category:** Electrical\
**Tags:** switchgear\
**Created:** [September 2, 2026, 12:25pm UTC](https://forumautomation.com/t/difference-between-high-tension-and-low-tension-panels/14345 "2026-09-02T12:25:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Rabert](https://forumautomation.com/user_avatar/forumautomation.com/rabert/32/6784_2.png) [@Rabert](https://forumautomation.com/u/Rabert)\
**Post date:** [September 2, 2026, 12:25pm UTC](https://forumautomation.com/t/difference-between-high-tension-and-low-tension-panels/14345/1 "2026-09-02T12:25:25Z")

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## Difference between High Tension and Low Tension Panels

## What is an HT Panel?

An **[HT Panel (High Tension Panel)](https://forumelectrical.com/what-is-ht-panel-explains-its-working-principle-functions-and-different-types/)** is designed to operate at voltages above 1 kV, typically 3.3 kV, 6.6 kV, 11 kV, 22 kV, or 33 kV.

It receives power from utility substations or transformers and safely controls, protects, and isolates high-voltage electrical circuits.

HT panels commonly include Vacuum Circuit Breakers (VCBs), protection relays, current transformers (CTs), potential transformers (PTs), busbars, and earthing switches.

## What is an LT Panel?

An **[LT Panel (Low Tension Panel)](https://forumelectrical.com/fat-procedure-for-low-voltage-electrical-panels-mcc-swbd-and-swgr/)** operates at voltages up to 1 kV, with 415 V and 230 V being the most common.

It distributes power from transformers to motors, lighting systems, HVAC equipment, and other low-voltage loads.

LT panels typically use Air Circuit Breakers (ACBs), Molded Case Circuit Breakers (MCCBs), Miniature Circuit Breakers (MCBs), contactors, overload relays, and metering devices.

 ![1](https://cdn.forumautomation.com/original/2X/5/5bc537499bba35d778c8cbc4e24275e44ac4e5a6.jpeg)

## Difference between High Tension and Low Tension Panels

## HT Panel vs LT Panel

| **Parameter** | **HT Panel** | **LT Panel** |
| --- | --- | --- |
| Full Form | High Tension Panel | Low Tension Panel |
| Operating Voltage | Above 1 kV | Up to 1 kV |
| Common Voltages | 3.3 kV, 6.6 kV, 11 kV, 33 kV | 230 V, 415 V |
| Primary Function | High-voltage switching and protection | Low-voltage power distribution |
| Incoming Supply | Utility grid | Distribution transformer |
| Circuit Breakers | VCB, SF6 CB | ACB, MCCB, MCB |
| Protection Relays | Numerical protection relays | Overload and protection relays |
| Busbar Rating | Medium-voltage insulated busbars | Copper or aluminum busbars |
| Safety Features | Arc-resistant design, interlocks | Interlocks and overload protection |
| Applications | Substations, industries | Buildings, factories, commercial facilities |