Inverter Duty Transformer (IDT)

Inverter Duty Transformer (IDT)

ETT ITD Series | 800 KVA | 33 kV / 0.433 kV | 3 Phase | ONAN | Outdoor

ETT Inverter Duty Transformers (IDT) are engineered to deliver the combined strengths of Off-Load reliability and On-Load intelligence — in a single, high-performance unit. Built with high-grade copper windings, CRGO silicon steel core, and BIS-approved energy efficiency, the IDT operates silently and remains stable under varying loads. Supported with Automatic Tap Changing functionality, it ensures stable output voltage even during frequent grid fluctuations — making it ideal for inverter-driven, solar, and industrial applications demanding uninterrupted, efficient power. 

Technical Specification

Transformer Type

Inverter Duty / Solar Duty Transformer

Rating

800 KVA

Voltage Ratio

33 kV / 0.433 kV

Phase

3 Phase

Frequency

50 Hz

Cooling Type

ONAN (Oil Natural Air Natural)

Installation

Outdoor

Duty

Continuous

Vector Group

Dyn11

HV Connection

Delta

LV Connection

Star with Neutral

Rated HV Current

14 A

Rated LV Current

1067 A

Tap Changer

Off Circuit Tap Changer (OCTC) / OLTC optional

Tap Range

+5% in steps of 2.5%

Impedance

5% to 6.25%

Insulation Class

Class A

Insulation Level (BIL)

170 kVp

Winding Material

Copper / Aluminium

Core Material

CRGO Silicon Steel

Oil Type

Mineral Oil conforming to IS 335

Temperature Rise

Oil: 50°C, Winding: 55°C

Ambient Temperature

50°C max

Applicable Standards

IS 2026, IS 1180

Protection

Buchholz Relay, PRV, OTI, WTI

Terminal Arrangement

HV/LV Cable Box

Earthing

2 Nos. body earth terminals

Efficiency

As per IS 1180 / customer requirement

Harmonic Capability

Suitable for inverter harmonics

Enclosure

Outdoor weatherproof tank