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Project Case Study

Oil Immersed Transformer and MV Switchgear for Industrial Plant Expansion

An oil-immersed transformer and medium voltage switchgear package supplied for an industrial plant expansion in Indonesia, covering system interface review, outdoor transformer configuration, MV feeder arrangement, testing documents and export shipment support.

Indonesia 2024 High Voltage Switchgear Industrial
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Oil Immersed Transformer and MV Switchgear for Industrial Plant Expansion
Project Overview

Project Snapshot

An oil-immersed transformer and medium voltage switchgear package supplied for an industrial plant expansion in Indonesia, covering system interface review, outdoor transformer configuration, MV feeder arrangement, testing documents and export shipment support.

This project involved the supply of oil-immersed transformers and medium voltage switchgear for an industrial plant expansion in Indonesia. The equipment was used to support additional production capacity and improve the plant power distribution system.

Before production, the existing plant single-line diagram and new project specification were reviewed to confirm voltage ratio, transformer impedance, protection requirements, switchgear feeder arrangement, cable termination method and installation interface with the existing electrical system.

The equipment was manufactured, tested and prepared with the required drawings, test reports and shipment documents before delivery to the project site.

At A Glance
Location
Indonesia
Project Year
2024
Product
High Voltage Switchgear
Industry
Industrial
Project Type
EPC Project
Standards
IEC, Local utility requirements, Project specification
Request Details

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Scope Of Supply

Equipment Supplied

Every unit delivered for this project, with quantity and configuration notes.

Oil-immersed Transformer

20kV oil-immersed distribution transformer for industrial plant expansion

Quantity: 3 units

Outdoor transformer configuration with protection accessories, nameplates, routine test reports and project documents.

High Voltage Switchgear

24kV medium voltage switchgear panels

Quantity: 1 lot

Including incoming panel, outgoing feeder panels, CT/PT arrangement, protection relay and metering configuration.

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Technical Data

Key Ratings

Voltage, capacity, and protection parameters confirmed for this project.

Technical ratings for this project
Parameter Value Notes
Transformer Capacity 3150 kVA Per transformer
Primary Voltage 20 kV Medium voltage side
Secondary Voltage 0.4 kV Low voltage side
Frequency 50 Hz Industrial plant system requirement
Vector Group Dyn11 Confirmed before production
Impedance 6% Matched to system short-circuit calculation
Cooling Method ONAN Outdoor oil natural air natural cooling
Installation Outdoor Industrial plant substation area
Transformer Protection Buchholz relay, oil temperature indicator, winding temperature indicator Accessory scope confirmed with customer
MV Switchgear Rated Voltage 24 kV Medium voltage switchgear system
MV Switchgear Rated Current 1250 A Main busbar rating
Short-circuit Current 25 kA / 3s According to project fault level requirement
Cable Entry Bottom entry Confirmed according to site cable trench layout
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Building To These Exact Ratings?

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How We Delivered

Challenge And Solution

The requirement on site, and how the specification, drawings, and production were supported.

The Challenge

Project Requirement

<p>The industrial plant expansion needed new transformer and MV switchgear equipment to connect with an existing power distribution system. The main technical concerns included voltage compatibility, transformer impedance, feeder arrangement, CT/PT selection, protection relay coordination, cable termination, outage planning and document approval before production.</p>

Our Solution

What We Supported

Our engineering team reviewed the existing system information, new project specification and single-line diagram before finalizing the proposal. Transformer ratings, impedance, protection accessories, MV switchgear arrangement, feeder schedule and metering requirements were checked against the plant electrical interface.

After the technical parameters were confirmed, we prepared drawings, datasheets, compliance documents, routine test reports and shipment documents to support project approval, installation and commissioning.

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Quality And Records

Testing And Documents

Inspection items and engineering documents prepared for this project.

Testing And Inspection

Routine Test FAT Test Report Provided Pre-shipment Inspection Mechanical Operation Check Secondary Circuit Check Power Frequency Withstand Voltage Test

<p>Routine tests were completed before shipment. Transformer testing included insulation resistance, voltage ratio, winding resistance, load loss, no-load loss, applied voltage and induced voltage. MV switchgear checks included mechanical operation, interlock function, secondary wiring inspection, insulation resistance and power frequency withstand voltage.</p>

Engineering Documents

Technical Proposal Product Datasheet General Arrangement Drawing Foundation Drawing Single-line Diagram Review Transformer Outline Drawing Switchgear Panel Arrangement Primary Schematic Secondary Schematic Control Wiring Diagram Terminal Plan Panel Schedule BOM / Component List CT / PT List Relay and Meter List Compliance Statement Technical Deviation Sheet FAT Procedure Test Report Installation Manual Operation & Maintenance Manual
Quality On Record

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We arrange routine tests, witness inspection, and full document sets so your equipment ships with proof of compliance.

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See Your Build

Want Photos Of Your Units In Production?

You get progress photos at production, testing, and packing stages so you track your order from factory to container.

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Export And Delivery

Packing And Shipment

Export packing, container loading, and nameplate records for this shipment.

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