Home > Transformers > HT Distribution & Power Transformers
High Tension Power Distribution

HT Distribution & Power Transformers

Heavy-duty oil-cooled HT distribution and power transformers built to IS 2026 standards for industrial substations, high-voltage power transmission, and plant electrical distribution infrastructure.

HT Distribution and Power Transformer
Voltage Ratio
11 / 0.433 kV
Vector Group
Dyn11
Standard
IS: 2026
Cooling Type
ONAN Oil Cooled
Efficiency
> 98%
Tap Changer
Off / On Load

What is an HT Distribution & Power Transformer?

High Tension (HT) Distribution and Power Transformers are industrial-grade transformers designed to handle high utility voltages (such as 11kV or 33kV) and step them down to standard low-voltage plant operating levels (433V/415V 3-Phase). Positioned at utility intake substations and heavy industrial plant yards, these transformers feature ONAN (Oil Natural Air Natural) cooling, high-grade copper windings, and robust insulation tanks to provide safe, reliable, and continuous power distribution across vast manufacturing facilities without breakdown.

Applications

Industrial Plant Substations
Main incoming power step-down transformers for factory yards and industrial complexes.
Heavy Manufacturing Facilities
Stepping down 11kV grid supply to 433V for heavy machinery, steel plants, and foundries.
Commercial Complexes
Central power distribution for high-rise commercial buildings, IT parks, and shopping malls.
Utilities & Distribution
Utility grid substations and regional electricity distribution networks.

Technical Specifications

Parameter Specification Details
Rating Spectrum Model dependent (100 kVA to 5000 kVA+)
Voltage Ratio 11 kV / 0.433 kV (Custom ratios available)
Frequency 50 Hz
Applicable Standard IS: 2026 / IEC 60076
Cooling Type ONAN (Oil Natural Air Natural)
Vector Group Dyn11
Duty Cycle Continuous 24x7 Duty Cycle
Efficiency Better than 98%
Tap Changer Off Load Tap Changer / On Load Tap Changer (OLTC)
Winding Material High-Grade Electrolytic Copper Wound
Tank Construction Mild Steel Corrugated Tank with Radiators
Protective Accessories Buchholz Relay, Oil Temperature Indicator, Winding Temp Indicator, Explosion Vent

Engineered For Your Power Requirements

Hindustan Stabilizers HT Distribution & Power Transformers are custom engineered according to customer specifications and electrical utility regulations. We offer off-load or on-load tap changers (OLTC), custom primary voltage ratings (6.6kV, 11kV, 22kV, 33kV), vector group configurations, and complete protective relay accessories based on your site requirements.

Why Hindustan Stabilizers

Industrial Engineering
Robust ONAN cooling and heavy duty tanks engineered for harsh outdoor substation environments.
Application-Focused Solutions
Tailored HT step-down ratings designed for manufacturing facilities and power utility substations.
Quality Components
100% electrolytic copper conductor windings and prime CRGO core laminations for > 98% efficiency.
Technical Support
Complete technical assistance for substation design, testing, commissioning, and preventive maintenance.

Frequently Asked Questions

What is an HT Distribution Transformer?
An High Tension (HT) distribution transformer steps down high voltage power from grid transmission lines (such as 11,000V) to standard distribution voltage levels (433V/415V) for industrial factory consumption.
What is the difference between Off-Load and On-Load Tap Changers (OLTC)?
An Off-Load Tap Changer requires isolating the transformer from the mains before adjusting voltage ratio taps. An On-Load Tap Changer (OLTC) adjusts voltage ratio taps dynamically while the transformer remains energized under full load.
What standards are Hindustan HT Transformers manufactured to?
Our HT distribution transformers are manufactured and tested strictly in compliance with IS 2026 and ISO 9001:2015 quality guidelines.

Need the Right Transformer for Your Application?

Provide your required kVA capacity, primary input voltage (e.g. 11kV), secondary output voltage, and substation installation parameters to our engineering team.