---
title: "Industry - Energy Intensive Industries - Relays"
canonical: "/industry-energy-intensive-industries-relays"
published: 2026-10-13
---

# Industry - Energy Intensive Industries - Relays

## Frame

## Frame

**Industry**

**Relays**

**Energy Intensive Industries**

**Friction**

## Frame

### Plug in Auxiliary relays

###### ENERGY INTENSIVE INDUSTRIES

##### Plug in Auxiliary relays

**Customer benefits**

Mors Smitt plug-in relays are engineered for long-life performance in demanding conditions. Designed for power-utilities, petrochemical industries, and mining applications, they deliver rugged reliability, flexible configuration, and proven durability in the toughest environments.

### Auxiliary relays

###### ENERGY INTENSIVE INDUSTRIES

##### Auxiliary relays

**Customer benefits**

##### Introduction

In industrial power systems, auxiliary relays act as a control interface between primary protection devices and plant equipment. They coordinate complex actions when a fault is detected, ensuring the correct operation of alarms, interlocks, and breaker trip circuits. By executing these supportive functions, auxiliary relays maintain safety and continuity—making sure that protective actions happen in the proper sequence to prevent minor issues from escalating.

### Supervision relays

###### ENERGY INTENSIVE INDUSTRIES

##### Supervision relays

**Customer benefits**

Supervision relays continuously monitor the integrity of critical control and protection circuits. By providing early warning of any issues—such as a blown fuse in a trip circuit or a loss of control power—they help prevent protection system failures. Early detection of these problems allows maintenance personnel to fix issues before a fault occurs, thereby avoiding unprotected conditions and unplanned downtime.

### Trip relays

###### ENERGY INTENSIVE INDUSTRIES

##### Trip relays

**Customer benefits**

Trip relays are the final action-takers in an industrial protection scheme. When a protective relay senses a fault, it often uses a trip relay (or lockout relay) to execute the actual tripping of circuit breakers and other devices. Trip relays provide a powerful, immediate command to isolate faults, often driving multiple breakers or systems at once. This fast action protects equipment and personnel by swiftly removing fault conditions from the plant.

### Sockets

###### ENERGY INTENSIVE INDUSTRIES

##### Sockets

##### Content in Development

Coming soon to help you explore Wabtec solutions and expertise.

### Test Blocks

###### ENERGY INTENSIVE INDUSTRIES

##### Test Blocks

**Customer benefits**

##### Introduction

Test blocks are essential for safe and efficient testing of protection systems in industrial settings. They allow engineers to simulate faults or isolate circuits for testing purposes without disrupting the rest of the system. By using a test block and plug, technicians can inject test signals or perform maintenance on relays and meters while the equipment remains in service, dramatically reducing downtime during routine testing or commissioning.

### Arc Fault Monitors

###### ENERGY INTENSIVE INDUSTRIES

##### Arc Fault Monitors

**Customer benefits**

##### Arc Fault Monitors and sensors

Arc fault monitors guard industrial facilities against dangerous arc flash events. An arc flash is an explosive release of energy caused by an electrical fault, and it can result in fire, equipment destruction, or serious injury. Arc fault monitoring systems use specialized optical and current sensors to detect an arc flash in its first milliseconds. Upon detection, they immediately trip breakers to cut power, greatly reducing the incident energy and damage.

**Auxiliary relays**

**Plug in Auxiliary relays**

**Supervision relays**

**Trip relays**

**Sockets**

**Test Blocks**

**Arc Fault Monitors**

## Frame