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Expertise in Energy

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NUCLEAR FIELD-PROVEN PARTNER

100k+ limit switches installed

GLOBAL PARTNER

46+ nuclear reactors equipped

EXPERIENCE PARTNER in nuclear

+40 years

Application notes

limit switches

to regulate operations and prevent incidents. Our limit switches have many functions such as: keeping crane from lifting over capabilities and preventing two trolleys from impacting.

Limit switches offer

PLC

to control heat pumps by measuring fluid temperatures and regulating the operation of heating and cooling.

Logic controllers offer

SOLID STATE RELAYS

reliable for solar trackers. Reversing the direction of a motor is one of the most common applications of solid-state relays, and since solar tracking systems must return to their initial position at the end of each day, Crouzet’s GN0 inverter will perfectly meet these needs.

Solid state relays offer

Applications we serve

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Nuclear Applications

Manufacturing the future of nuclear power plants by delivering certified and safety Position Sensors withstanding the most severe conditions (IEEE, RCC-E 2005, RCC-E 2012).

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HVAC Dampers:

Stable temperatures, appropriate humidity levels and pressure staggering are essential for safety and reliable operation of nuclear facilities and power plants. Our nuclear certified limit switches detect the open or closed state of HVAC dampers in order to maintain a stable presssure within the nuclear facilities.

Limit Switch SP4816

Limit Switch SP916210

Limit Switch SP452255

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Hoist Motion:

Our nuclear certified limit switches are mounted in hoist motion to detect the end of the safe travel distance to stop the motion.

Limit Switch 83770

Limit Switch SP4816

Hoists, polar and handling cranes

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Hoists, polar and handling cranes:

Nuclear cranes require electromechanical limit switches to regulate operations and prevent incidents. Our limit switches have many functions such as : keeping crane from lifting over capabilities and preventing two trolleys from impacting. For load measurement, a load pin is integrated within the hoists system as a safety device to measure any overload of the maximum operating weight.

Limit Switch 83770

Limit Switch SP4813

Load Pin

Electric Actuators

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Electric Actuators:

Valve actuators require highly precise and snap action microswitches to change from one state to another one in a few milliseconds, over several cycles with excellent repeatability.

83139 Microswitch

83133 Microswitch

V3-83161 Microswitch

V4S-8318 Microswitch

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Valves:

Nuclear certified (RCC-E 2005 & 2012 certification) and robust Crouzet limit switches are mounted on the valve frame in order to detect accurately the position of the main valve shaft, whatever the conditions. Crouzet Limit Switches indicate very precise information (up to 3 positions: closed, open or intermediate) to provide high level of reliability.

Limit Switch SP452255

SP4863 Limit Switch

Limit Switch SP4813

SP916250 Limit Switch

SP3969 Limit Switch

Energy Distribution

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Energy Distribution Applications

We ensure reliable and safe power flow thanks to microswitches and position sensors.

Medium Voltage Substation Switching

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Medium Voltage Substation Switching products:

Medium Voltage contactors/disconnectors which are frequently opened and closed require long-life and easy-to-install microswitches as auxiliary signalling contacts. They accurately detect the different positions of manual or motorized systems.

83106 Microswitch

83154 Microswitch

Medium Voltage Substation Control

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Medium Voltage Substation Control products:

Our Microswitches detect the opening position of electrical cabinet drawer to ensure workers safety during maintenance operations.

V4-83170 Microswitch

V3-83161 Microswitch

V5S-8320

Medium Voltage Substation Protection

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Medium Voltage Substation Protection products:

Medium Voltage Earthing switches require long-life and easy-to-install microswitches as rotary-handle auxiliary contacts to accurately detect the different positions.

V4-83170 Microswitch

V3-83161 Microswitch

V5S-8320

High Voltage Substation Control

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High Voltage Substation Control products:

Our Microswitches detect the opening position of electrical cabinet drawer to ensure workers safety during maintenance operations.

V4-83170 Microswitch

V3-83161 Microswitch

V5S-8320

High Voltage Substation Protection

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High Voltage Substation Protection products:

High Voltage Earthing switches require long-life and easy-to-install microswitches as rotary-handle auxiliary contacts to accurately detect the different positions.

V4-83170 Microswitch

V3-83161 Microswitch

V5S-8320

High Voltage Substation Switching

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High Voltage Substation Switching products:

High Voltage contactors/disconnectors which are frequently opened and closed require long-life and easy-to-install microswitches as auxiliary signalling contacts. They accurately detect the different positions of manual or motorized systems.

83106 Microswitch

83154 Microswitch

Low Voltage Substation Switching

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Low Voltage Substation Switching products:

Disconnectors/contactors need robust and reliable microswitches as signalling auxiliary contacts to detect the various positions and provide information about the switching status of the disconnector.

V4-83170 Microswitch

V3-83161 Microswitch

V5S-8320

Low Voltage Substation Control

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Low Voltage Substation Control products:

Our Microswitches detect the opening position of electrical cabinet drawer to ensure workers safety during maintenance operations.

V4-83170 Microswitch

V3-83161 Microswitch

V5S-8320

Low Voltage Substation Protection

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Low Voltage Substation Protection products:

Circuit breakers require snap action microswitches: V4 or V5S detect the position of the contact and trips indication due to overload or short-circuit. Fuses and Earthing switches need easy-to-install, robust and reliable signaling auxiliary contacts to provide information about their switching status and position.

V4-83170 Microswitch

V3-83161 Microswitch

V5S-8320

Low Voltage Analog Time Switches

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Low Voltage Analog Time Switches products:

Analog time switches require snap action microswitches with long operation life such as the V3-83161 in order to make or break the current as per programmed setting.

V3-83161 Microswitch

Renewable Energy

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Renewable Energy Applications

You can rely on years of experience in the wind energy and solar panels sectors. For solar panels to achieve their best performance and for wind turbine position control head optimisation and power generation.

Yaw System and Wind Power Generator

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Yaw System and Wind Power Generator products:

The yaw system of wind turbines is the component responsible for the orientation of the wind turbine rotor towards the wind. Wind power generators require robust and reliable microswitch as V4S-8318 to work under severe conditions (IP65, High temperature up to 125°c). Our V4S-8318 accurately detects worn out brushes inside the brush holder system.

V4S-8318 Microswitch

em4

Wind Turbine Elevator

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Wind Turbine Elevator products:

Position sensors detect the start and end of the elevator’s travel, permitting access to the upper part of the wind turbine for maintenance. Control relays ensure the correct functioning and maintenance of the motor, detecting anomalies such as errors on the rotation direction, overheading, surge currents for easy, safe and reliable control, including remote control.

Position Sensor

Control Relay

em4

Wind Turbine Motor Brake

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Wind Turbine Motor Brake product:

Linear sensors and enclosed microswitches for detecting the brake position.

V4S-8318 Microswitch

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Solar Inverter product:

Electrical converter which converts the variable direct current (DC) output of a photovoltaic (PV) solar panel into a utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-grid electrical network.

Solar Tracking System

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Solar Tracking System product:

Device that directs a payload towards the Sun. High performance software to optimise solar panel positioning : Millenium 3 allows to set up the tracker quickly and easily and exact positioning 365 days a year, 24 hours a day.

Millenium 3

Control Electronics

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Control Electronics products:

Control electronics for energy management, efficiency management and remote maintenance.

Products & Services

Microswitches

Limit Switches

DC Motors

Logic Controllers

Structural Monitoring Sensors

Thermal Circuit Breakers

Hermetically Sealed Relays

Driven by innovation, our experts are focused on designing and delivering the right product for the right application.

Custom products designed
for your applications

40+ years of Sensors expertise in the Nuclear Industry

Quality Management & Customization Agility at your service: thanks to our quality & control management team, Crouzet meets the different nuclear qualifications IEEE, RCC-E 2005, RCC-E 2012. As experts in sensing technologies, we can provide you with the solution adapted to your exact need thanks to our dedicated design, test facilities and leading edge tools.

Customised solutions

High quality standards
IEEE, RCC-E 2005, RCC-E 2012

Contact DesignLAB.

Our renowned Customers

They’ve been trusted us for decades

PDF

Position sensing solutions qualified
for nuclear environments (IEEE, RCC-E2012)

Download our full product overview for position sensing solutions qualified for nuclear environments (IEEE, RCC-E2012)

Crouzet through the years.

1921

Creation of Crouzet

1955

First motors production

1960

First microswitch

1970

Automation and control product line + First evaluation of our nuclear switches by EDF

1980

Launch of a custom microswitch for circuit breakers + Export licence for Chinese nuclear power plants

1990

Co-development of auxiliary contacts for circuit breakers + Start of nuclear project in Korea

2000

Chinese second generation phase nuclear project support

2007

Co-development of a specific motor for electrical cabinets

2010

Launch of a specific electronic board for lightning conductor

2013

Obsolescence management for Northern European nuclear operator (IEEE certification)

2020

New product range certification RCC-E 2012

Industry news

RCC-E 2012 Limit Switches

11.02.25

RCC-E 2012 and Crouzet limit switches

In the nuclear sector, the reliability of electrical equipment is a crucial issue. Every component used in a power plant must meet…

Read more

10.11.24

Why do you need a limit switch for your automatic gate?

Aa For both swinging and sliding automatic gates, a limit switch is absolutely essential for gate…

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09.11.24

What is a turnstile?

A turnstile is a gate that controls or monitors pedestrian traffic flow. This important physical structure…

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Working with us

Thanks to the expertise, diversity and agility of its teams worldwide, Crouzet is committed to satisfying its customers in their most demanding requirements.

Find out more about Crouzet