3150 kVA 33kV Three-Phase On-Load Tap Changer (OLTC) Transformer

Technical Specifications

Rated Capacity	3150 kVA
Primary Voltage (U1)	33,000 V (33 kV)
Secondary Voltage (U2)	415 V / 240 V (3-Phase 4-Wire)
Vector Group	Dyn11
Rated Frequency	50 Hz
Cooling Method	ONAN (Oil Natural Air Natural)
Primary Current (I1)	55.11 A
Secondary Current (I2)	4382.4 A
Guaranteed No-Load Loss (P0)	2800 W
Guaranteed Load Loss (Pk at 75°C)	21000 W
Short-Circuit Impedance (Uk)	5.0%
HV Insulation Level	LI 170 / AC 70 (33kV Class)
Temperature Rise Limits	Top Oil ≤ 50K, Winding ≤ 55K (45°C Ambient)
Creepage Distance	≥ 31 mm/kV (Outdoor Tropicalized Porcelain)
Core & Coil Weight	4500 kg
Insulating Oil Weight	2600 kg
Total Assembled Weight	8900 kg
Overall Footprint (L×W×H)	2300 mm × 1480 mm × 2400 mm
Governing Standards	IEC 60076, BS 171, SON NIS, NERC Code

Equipment Video Walkthrough 100% Tested

Watch 100% factory routine testing & quality control inspections.

Pricing & Availability

Reference FOB Price

USD 32000

Public Marketplace Range

$17,600 – $33,500

Based on public listings. Often lead-generation or minimum-config prices — not full-scope.

Minimum Order

1 Set

Units in Stock

5

Model / Series

OLTC

Indicative export reference only. Final offer depends on voltage, standards, materials, accessories, and project scope. Request a firm quote →

Product Information

Status

Published

Product ID

3150_KVA_33KV_THREE_PHASE_ON_LOAD_TAP_CHANGER_OLTC_TRANSFORMER

Last Updated

2026-04-06 00:58:37.714818

Technical Highlights

This product combines dependable transformer platform design, flexible project configuration, and practical export-oriented construction. It is suitable for applications requiring stable electrical performance, configurable voltage ratios, outdoor durability, and documentation support for international project supply.

Application Scenarios

Utility distribution networks
Industrial plants and workshops
Commercial buildings and mixed-use developments
Public infrastructure projects
Regional and municipal power distribution systems

Key Features

Designed for electrical control, automation, and load-side switching functions
Configurable internal component arrangement according to process and feeder requirements
Supports communication, metering, and interface options for smart plant integration
Cabinet construction suitable for industrial and infrastructure environments
Project-oriented documentation, labeling, and wiring scheme support available
Suitable for export supply and customized control-package delivery

Optional Configurations

Low-voltage side rating and voltage ratio
Frequency: 50 Hz or 60 Hz
Vector group and tapping range
Copper or aluminum winding
Cooling method, accessory package, and monitoring option
Tank structure, coating system, and special environmental adaptation
Color, nameplate language, and document package
Ambient temperature, altitude, and installation condition adaptation

Internal Component Engineering Anatomy

High-precision 3D engineering cutaway model illustrating the core, windings, insulation, conservator tank, and protection accessories.

Oil-immersed transformer internal 3D cutaway model

High-Grade Silicon Core

Electrolytic Copper Windings

Tap Changer System

Buchholz & Temp Sensors

XinHuan 3150 kVA 33kV Three-Phase On-Load Tap Changer (OLTC) Transformer 2D AutoCAD General Arrangement Drawing Blueprint

Engineering Submittal Drawing

2D AutoCAD General Arrangement (GA) Drawing

Official XinHuan factory 2D vector General Arrangement drawing for 3150 kVA 33kV Three-Phase On-Load Tap Changer (OLTC) Transformer. Includes front elevation view, top plan view, bushing center-to-center distances, mounting hole footprint, and complete vector group layout.

Full Dimensions ($L \times W \times H$)

Bushing Terminal Distances

Mounting Base Footprint

Vector Group & Title Block

Request CAD Submittal (.DXF / .PDF) Factory Quality Inspection

Frequently Asked Questions

Please send us your required capacity, high voltage, low voltage, frequency, cooling preference, and installation conditions for the 3150 kva three-phase on-load tap changer (oltc) transformer. Our team can recommend a suitable configuration and provide a quotation based on your project requirements.

The product can be produced according to IEC standards and customer technical specifications. Routine factory tests, inspection records, and technical documentation can be provided before shipment. Optional configurations for project-specific grid, environmental, and accessory requirements are available upon request.

Minimum order quantity is 1 Set. The product is prepared for export shipment with suitable packing and transport arrangements based on destination and handling requirements. Technical documents, test reports, nameplate confirmation, and pre-shipment support can be supplied according to order requirements. OEM/ODM support and project-based coordination are available for qualified inquiries.

Related Markets & Resources

🌍

Africa & MENA

11kV & 33kV IEC grid requirements

🌏

Middle East & GCC

IEC 60076 · up to 132kV · high ambient

🌎

Latin America

60Hz ANSI/IEEE · 13.8kV / 34.5kV

Buyer's Guide

How to source from China

IEC vs ANSI Standards

Which standard for your project?

Standards & Compliance