Power Requirements For A Refrigerated Container

Article Written By: Bobby Addis
Date: 01/11/2024

Introduction

When installing a refrigerated shipping container (also known as a reefer unit), it’s essential to understand the power supply requirements to ensure safe and reliable operation. These containers are fitted with integrated cooling systems that must run continuously to maintain a stable internal temperature. Below is a breakdown of what’s required.

Table of Contents

Electrical Supply Requirements

Refrigerated containers require a 3-phase 380/440 volt power supply. This supply must include both earth and neutral connections to function correctly and safely. Each container is fitted with a 5-pin 32A CE plug, which means it needs to be connected to a minimum 32-amp, motor-rated supply via a compatible 5-wire socket.

Key Electrical Components

To ensure your setup is compliant and performs as expected, the following components are necessary:

  • Isolator Switch
    An isolator should be installed close to the distribution board. This allows the unit to be safely disconnected for maintenance or in the event of an emergency.

  • Type ‘D’ Circuit Breaker
    We recommend using a Type ‘D’ circuit breaker, which is specifically designed to accommodate the high start-up current typical of refrigeration compressors.

Important Safety Note

If you’re uncertain about the power infrastructure at your site—particularly whether it supports 3-phase power at the correct voltage and amperage—it’s crucial to consult a qualified electrician before proceeding with installation. Improper connection can result in equipment damage or pose safety risks.

Summary

To power a refrigerated shipping container safely:

  • Use a 3-phase 380/440V supply with earth and neutral

  • Connect using a 32A, 5-pin CE plug and compatible socket

  • Install an isolator and a Type ‘D’ circuit breaker

  • Always seek advice from a qualified electrician if in doubt

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