LT and HT panels are vital components of any electrical infrastructure. They manage voltage levels, ensure safety, and support smooth power distribution in setups ranging from shopping malls to power substations.
These panels form the foundation of an efficient HT LT power distribution system, enabling control of electricity from the utility grid to end-use equipment. From HT & LT panel installation in substations to control panel deployment in buildings, understanding the difference between HT and LT panels is essential for reliable and scalable electrical design.
For clarity, we’ve included a simple and informative comparison table of HT and LT panels to help you grasp their core differences quickly.
What is an LT Panel?
An LT Panel (Low Tension Panel) is a switchgear component that operates at voltages below 1kV, most commonly at 415V or 230V. Positioned on the secondary side of a transformer, it distributes electrical power safely and efficiently to lighting systems, machinery, and utility loads within a facility.
👉 Learn more about LT panels, their components, and applications in our complete LT Panel guide.
Key Functions of LT Panels
Key functions include:
- Safe distribution of electricity to internal loads
- Overload, short-circuit, and fault protection
- Integration with automation and energy monitoring systems
- Power factor correction using APFC
- Enabling efficient operation of LT electrical lines
Common Types of LT Panels
Some typical types are:
- PCC Panels for centralized distribution
- MCC Panels for motor control
- APFC Panels for power factor optimization
- Automatic Mains Failure (AMF) Panels
👉 Explore the different LT panel types with diagrams in our LT Panel Types & Applications guide.
Applications of LT Panels
Used in:
- Residential & commercial buildings
- Data centers and hospitals
- Small-scale industries and shopping malls
- Places requiring 230V–415V LT power panels
What is an HT Panel (High Tension Power Distribution Panel)?
HT Panels (High Tension Panels) manage incoming power from utility grids at voltages ranging from 3.3kV to 33kV. These panels are installed on the primary side of transformers and control how high-voltage electricity enters a facility.
👉 Understand how HT panels work, including their components and safety features in our HT Panel guide.
Functions of HT Panels
HT Panel functions include:
- Switching and isolating high-voltage circuits
- High-voltage fault management and relay protection
- Monitoring and controlling HT power distribution networks
- Interfacing with SCADA for remote diagnostics
Common Types of HT Panels
Examples include:
- VCB (Vacuum Circuit Breaker) Panels
- SF₆ Gas-Insulated Breakers
- RMUs for ring-type HT layouts
- Outdoor HT Kiosks for substation deployment
👉 See the complete list of HT panel types with diagrams in our HT Panel Types guide.
Applications of HT Panels
HT Panels are used in:
- Electrical substations
- Large-scale industries (steel, cement)
- Metro rail electrification
- High-voltage installations in solar and wind farms
Key Differences Between LT and HT Panels (Comparison Table)
The choice between LT and HT panels depends on factors like voltage level, installation position, protection devices, and scale of operation. The table below highlights the key differences between HT and LT panels and serves as a quick reference guide to help you choose the right panel for your electrical distribution system.
| Feature | LT Panel (Low Tension) | HT Panel (High Tension) |
|---|---|---|
| Voltage Range | Up to 1kV (typically 415V) | 3.3kV to 33kV |
| Position in Network | After the transformer (secondary side) | Before the transformer (primary side) |
| Main Use | Distributing power to end loads | Receiving and controlling HV supply |
| Protection Devices | MCBs, MCCBs, Relays | VCBs, SF6 Breakers, RMUs |
| Operation Safety | Basic electrical safety | Requires trained professionals and PPE |
| Cost | Lower installation and maintenance cost | Higher installation and servicing cost |
| Common Applications | Commercial buildings, light industries | Heavy industries, substations, utilities |
LT and HT Panel Selection Guide
When choosing between LT and HT panels, consider the following:
1. Voltage Requirement
- LT Panels → 415V/230V
- HT Panels → 3.3kV, 6.6kV, 11kV, 22kV, 33kV
2. Power Demand
- LT → Buildings, malls, light industries
- HT → Substations, manufacturing plants
3. Compliance & Safety
- HT panels require PPE and licensed professionals
- LT panels meet general wiring regulations
4. Cost and Maintenance
- LT → Lower cost, easier to maintain
- HT → Professional servicing, higher cost
Summary: Why LT and HT Panels Matter
HT and LT Panels are the backbone of modern electrical infrastructure.
- HT Panels receive and control incoming high-tension power, ensuring safety at the entry point.
- LT Panels distribute low-voltage electricity to all end-use devices, supporting daily operation.
Together, they enable a reliable, compliant, and scalable power distribution system.
Related Articles You May Like:
- LT Panel Guide: In-depth explanation of LT panel types, design, and components.
- HT Panel Working: Understand the working, protection, and SCADA integration of HT panels.
- Difference Between LT and HT Lines: Learn how voltage levels are categorized in transmission.
- HT vs LT Motor: Know which motor type suits your application.