Pressure Relief & Control

Advanced Overpressure Protection for Critical Transformer Assets

Rapid pressure rise and over‑pressure events inside oil‑filled electrical equipment can lead to tank rupture, oil discharge, fire risk, and environmental damage.

Insulect supplies a comprehensive range of Pressure Relief & Control Devices from COMEM and Qualitrol, ensuring effective pressure management and controlled discharge across all transformer sizes and applications.

These devices provide passive mechanical protection that operates independently of power supply, forming a critical last line of defence during internal fault events.

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What Are Pressure Relief & Control Devices?

Pressure Relief Devices (PRDs) are mechanical safety components fitted to oil‑filled equipment to:

Relieve excessive internal pressure during fault conditions
Prevent tank deformation, rupture, or explosion
Direct hot oil and gases away from personnel and critical equipment
Automatically reseal after pressure returns to safe limits

Modern PRDs can also include alarm contacts, operation indicators, and controlled discharge ducts, supporting safer operation and condition monitoring.

Application Overview

Pressure Relief & Control Devices supplied by Insulect are commonly used on:

Power and distribution transformers
Generator step‑up transformers
Load tap changers
Reactors and oil‑filled auxiliary equipment
Mobile and containerised transformer systems

They are suitable for small distribution units through to large power transformers, including offshore, coastal, high‑corrosion, and environmentally sensitive installations.

What We Solve For

Transformer Tank Protection

Rapid relief of excessive internal pressure
Minimises structural damage during internal faults

Personnel Safety

Directed discharge reduces risk of hot oil and gas exposure
Protects operators during high‑energy fault events

Environmental Risk Reduction

Controlled oil release simplifies containment and cleanup
Supports environmental and safety compliance obligations

Passive, Reliable Operation

Mechanical operation independent of power supply
Automatic resealing after pressure event

Design Flexibility

Multiple sizes and pressure settings
Retrofit and new transformer compatibility

Product Range Overview

IMPLEMENTATION

Services & Support

Insulect offers comprehensive services and support for the products we specialise in, enhancing value for local utilities, major energy users, equipment manufacturers, and service operators.

LOCAL TECHNICAL TEAM

Our local technical team provides exceptional support and expertise, ensuring quick response times and personalised service to tackle any challenges that may arise during project execution.

ENGINEERING EXPERTISE

Through Qualitrol and COMEM, our team utilises advanced technology and industry knowledge to assist customers.

PROCUREMENT & LOGISTICS

We facilitate smooth procurement and logistics processes by sourcing from trusted, proven partners and coordinating timely deliveries, ensuring projects remain on schedule and within budget.