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We stock thousands of circuit protection products for a broad range of applications from quality brands such as ABB, Bulgin, Bussman, E-T-A, Littelfuse, Schaffner and Schurter
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Over 40 Years Experience
E. Preston Electrical

Circuit Protection

What is a Circuit Protection device?

A circuit protection device is a fail-safe device that originates a disruption in an electrical circuit when it recognizes an excess and unsafe power load in a circuit. The main aims of circuit protection are to localise and isolate the situation or fault and avert and minimize any unnecessary power loss.

What Do We Supply?

We have broad selection of circuit protection devices, including:
Circuit breakers
Thermal circuit breakers
Thermal-magnetic circuit breakers
Magnetic circuit breakers
Hydraulic-magnetic circuit breakers
Fuses
LV fuse links
LV fusegear

Why Choose E. Preston?

Established in 1980, we offer customer service that is second to none. This is one primary factor behind the growth in business we have experienced over the past forty two years. We have expert knowledgeable staff who are always on hand to answer any technical questions you might have about our products – they are just a phone call away.

The second main reason behind the company’s growth is the sheer depth in our products. We stock, or have access to, thousands of circuit protection products for a broad range of applications. The quality brands that we deal with include ABB, Bulgin, Bussman, E-T-A, Littelfuse, Schaffner and Schurter. You don’t have to search anywhere else for your needs.

In addition, we will do our very best to make sure that you receive your order next day, as long as you order in time, and if required, and we can offer flexible payment terms.
to place an order or speak to our technical team about circuit protection devices.

Featured Products

Manufacturers

News

September 18, 2026

Finder 7M Series Smart Energy Meters

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Smart Energy Meters

Finder 7M Series

The Finder 7M Series is a line of smart,
bi-directional energy meters featuring
NFC programmability and MID certification
for residential, commercial, and industrial
monitoring. The 7M Series of energy meters
are characterized by an innovative design,
a backlit LCD display and NFC programmability
through the dedicated Finder Toolbox NFC app.

The range Includes:

Five bi-directional single-phase energy meters with LCD display -Types 7M.24.0001/0010/0210/0310. Ideal for monitoring domestic and industrial energy consumption including offices, photovoltaic systems, campsites and similar.

Three bi-directional multi-functional energy meters with backlit matrix display – Types 7M.38.0112/0212/0312. MID certified at 80 A, 70 °C for three-phase (3 or 4-wire) and single-phase systems.

Other common features such as tamperproof terminal shields, touch-sensitive navigation and programming key and MID certification means all the range is safe, reliable and highly accurate.

Applications:

  • Panels for Electrical Distribution
  • Control Panels
  • Electrical Energy Control
  • Industrial Robots
  • Road / Tunnel Lighting
  • Elevators and Lifts

Enquiry Form: https://www.epreston.co.uk/contact/

Home Page: https://www.epreston.co.uk/epblog/

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September 17, 2026

Finder 6M Series Power Analyzers

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Modbus Power Analyzer Products

Finder 6M Series

The Finder 6M Series is a lineup of
compact, all-in-one single-phase power
analyzers, current transformers,
and energy monitors designed to track and
optimize electrical consumption.

The range Includes:

Type 6M.Tx – Single phase Modbus quality power Monitors.
All-in-one CT, Power/Energy meter and Supply quality monitor + Modbus communications.

Technical Features:

  • True-RMS AC and DC measurements
  • Accuracy class: 0.5% F.S.
  • Up to 300 A – 800 V AC
  • Up to 400 A – 1000 V DC measurement
  • Bi-directional active energy measurement kWh
  • Working frequency: DC or 1…400 Hz
  • Fully configurable via Modbus RS485 interface (free software)

Type 6M.BU.0.024.2200 – Modbus RS485 RTU.
Modbus TCP/IP Gateway with on board web server interface.

Technical Features:

  • Ethernet com port: 10/100 Mb/s (Max 10 Client)
  • Modbus RTU com port: RS485 up to115.200 bit/s (Max 200 slave)
  • User interface: 6 LED
  • Insulation between power supply, RS485, Ethernet: 1500 V
  • DIN rail mounting

Applications:

  • Charging Stations
  • Inverter
  • Panels for Electrical Distribution
  • Control Panels
  • Electrical Energy Control
  • Industrial Robots

Enquiry Form: https://www.epreston.co.uk/contact/

Home Page: https://www.epreston.co.uk/epblog/

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