Protection relays

98 companies | 656 products
{{#pushedProductsPlacement4.length}} {{#each pushedProductsPlacement4}}
{{product.productLabel}}
{{#if product.activeRequestButton}}
{{/if}}
{{product.productLabel}}
{{product.model}}

{{#each product.specData:i}} {{name}}: {{value}} {{#i!=(product.specData.length-1)}}
{{/end}} {{/each}}

{{{product.idpText}}}

{{productPushLabel}}
{{#if product.newProduct}}
{{/if}} {{#if product.hasVideo}}
{{/if}}
{{/each}} {{/pushedProductsPlacement4.length}}
{{#pushedProductsPlacement5.length}} {{#each pushedProductsPlacement5}}
{{product.productLabel}}
{{#if product.activeRequestButton}}
{{/if}}
{{product.productLabel}}
{{product.model}}

{{#each product.specData:i}} {{name}}: {{value}} {{#i!=(product.specData.length-1)}}
{{/end}} {{/each}}

{{{product.idpText}}}

{{productPushLabel}}
{{#if product.newProduct}}
{{/if}} {{#if product.hasVideo}}
{{/if}}
{{/each}} {{/pushedProductsPlacement5.length}}
arc flash protection relay
arc flash protection relay
AF0100 series

Trigger voltage: 100 V - 240 V

... Series arc-flash relay is a cost-effective solution that reduces arc-fault damage by detecting the light from an arc flash and rapidly tripping. Two remote light sensors can be connected to one relay ...

See the other products
Littelfuse
arc flash protection relay
arc flash protection relay
D0920 series

... circuit breakers with a 220/250 Vdc shunt trip coil. The D0920 has one output indication relay with an isolated normally-open contact, and one output indication relay with an isolated normally-closed ...

See the other products
Littelfuse
overload relay
overload relay
MP8000 series

Trigger voltage: 90 V - 690 V

The MP8000 is an advanced motor protection electronic overload relay that is fully programmable via Bluetooth* using an iPhone* or Android* smartphone or tablet with the Littelfuse App. It is easy to ...

See the other products
Littelfuse
thermal protection relay
thermal protection relay
TH-N Serie

Motor protection relays that protect your motor against burnout. Can be used for protection against motor burnout during overload or locked rotor. Offers a wide range of functions, including ...

thermal protection relay
thermal protection relay
ZEB series

Tripping current: 250 A

... functional safety and service life of a motor depend mainly on the motor protection. From attractively priced bimetal options to full motor protection with networking options, Eaton offers ...

See the other products
Eaton
thermal protection relay
thermal protection relay
TI 9C-5 series

Tripping current: 1.8 A - 2.8 A

... series of thermal overload relays are ideal for protection of squirrel-cage motors when used with the contactor range CI4 - CI86. TI 180E and TI 630E electronic motor protection relays ...

overload relay
overload relay
PISA11.401

Tripping current: 1 A
Trigger voltage: 24 V

This protection module fulfills two basic functions. First it distributes the current of a large power source to four lower current output channels and therefore allows for smaller wires to be used. The second function ...

See the other products
PULS GmbH
safety protection relay
safety protection relay

Industrial safety relays provide an interface between safety devices and the machines and processes those devices monitor for an easy-to-use safety control solution.

over-voltage protection relay
over-voltage protection relay
9079 series

... frequency surge voltages e g occurring dunng réguler electric railway operation along railway lines They provide sufficient safety even in the worst case scénario if the overhead high voltage lines fall to the ground Applications DC ...

overload relay
overload relay
RW_E series

Tripping current: 0.4 A - 420 A
Trigger voltage: 690, 1,000 V

The RW_E is meant to assure increased reliability for protection of low voltage three-phase electric motors in sinusoidal 50/60 Hz networks where reliability, low power dissipation and ease maintenance management are ...

thermal protection relay
thermal protection relay
TI 9C-5

Tripping current: 0.13 A - 0.2 A

... Identical product 047H4060 Packing format Multi pack Product description Thermal Overload Relay Product group Contactors and motor starters Product name Overload relay Quantity per packing format ...

See the other products
Danfoss Industrial Automation
thermal protection relay
thermal protection relay
Txx series

Tripping current: 40 A - 200 A

Thermal overload relays are economic electromechanical protection devices for the main circuit. They offer reliable protection for motors in the event of overload or phase failure. Starter ...

thermal protection relay
thermal protection relay

Mitsubishi Electric offers AC and DC controlled Contactor Relays with multiple open and closed contacts configurations that can be used in a variety of applications. They are suitable for alarms and sensors, signal switching, ...

See the other products
MITSUBISHI Automation
thermal protection relay
thermal protection relay
TH series

Trigger voltage: 690 V

Motor protection relays that protect your motor against burnout. Can be used for protection against motor burnout during overload or locked rotor. Offers a wide range of functions, including ...

voltage protection relay
voltage protection relay
SIR-A

Tripping current: 1 A - 5 A
Trigger voltage: 24 V - 230 V

... the overcurrent protection function does not clear the fault until the adjusted time delay is finished. It is necessary, in those cases, to clear the fault quickly using the SOTF function. - The SIR-A ...

See the other products
FANOX ELECTRONIC
earth-leakage protection relay
earth-leakage protection relay
SIA B

Trigger voltage: 230, 24, 110 V

SIA-B SPECIFIC CT’s DUAL & SELF-POWERED OC&EF PROTECTION RELAYS The SIA-B Self-powered Protection Relay is a Secondary Distribution Protection prepared ...

See the other products
FANOX ELECTRONIC
over-current protection relay
over-current protection relay
SIA-B Standard CT's

Trigger voltage: 24 V - 230 V

... IN PROTECTION SOLUTIONS. Advanced OC&EF Self-Powered Protection Relay SIA B with Standard CT’s, is an overcurrent protection relay ...

See the other products
FANOX ELECTRONIC
earth-leakage protection relay
earth-leakage protection relay
X52DL6

COMBI-6 Type A & F MULTI-CHANNEL EARTH LEAKAGE RELAY - up to 6 indipendent inputs type A & F - to be used with TDC series sensors - easy programming by 4 front buttons - space and costs optimization - 6 trips N/O ...

See the other products
FRER
earth-leakage protection relay
earth-leakage protection relay
X52DSX

... 0,2÷5s • One or two operating trip relays. • Output relays test. • Manual (local or remote) or programmable automatic reset. • Continuous control of wiring connection between the relay ...

See the other products
FRER
earth-leakage protection relay
earth-leakage protection relay
X48DSX

... 0,2÷5s • One or two operating trip relays. • Output relays test. • Manual (local or remote) or programmable automatic reset. • Continuous control of wiring connection between the relay ...

See the other products
FRER
grid and system protection relay
grid and system protection relay
RE NA003-M64

Trigger voltage: 110, 24 V

Grid protection monitoring relay RE series; Frequency and voltage monitoring; Grid and system protection; Functionally Safe; Measuring voltage 3 x 400/230V AC; Supply voltage 24V DC, ...

current protection relay
current protection relay
RM2I

Current relay 2 Module Min or max alarm, selectable on field Input 5A or 1A Adjustable set point, hysteresis and delay Field selectable negative or positive security (fail safe) Intervention inhibition ...

See the other products
IME Spa
thermal protection relay
thermal protection relay
T-119

Temperature relay T-119 for dry type transformer temperature monitoring

thermal protection relay
thermal protection relay
MINITIMER | BA 7961

The contact protection relay BA 7961 protects sensitive control contacts of e.g. digital plc outputs, limit contacts on measuring devices, low load reed contacts against early wearing. It has a low input ...

over-current protection relay
over-current protection relay
MCR-225

Trigger voltage: 230 V

... reinforcement via feedback loop Y1 - Y2 Over-current and short-circuit proof Realisation of several safety applications Technological and economical optumum Safety TypIII-C according to EN 574 Category ...

voltage protection relay
voltage protection relay
RX-5

Tripping current: 1 A - 1,000 A
Trigger voltage: 0 V - 600 V

RX Motor Protection Relay Take your motor protection to a new level. The RX Series provides more than just solid state overload or power protection relays. ...

earth-leakage protection relay
earth-leakage protection relay
RG1M series

WG series electronic differential protection relay for connection to external WG / WGS / WGC series toroidal transformers These are highly reliable electronic relays with the option ...

See the other products
CIRCUTOR
earth-leakage protection relay
earth-leakage protection relay
RGE series

Electronic earth leakage protection relay, used to connect to the earth leakage transformers WG / WGC Series These electronic relays offer a high reliability, with the option of a ...

See the other products
CIRCUTOR
earth-leakage protection relay
earth-leakage protection relay
CBS4 series

Unit equivalent to 4 earth leakage protection networks. 4 independent programmable relays available Four inputs to connect the external toroidal transformers of the WG Superimmunized Type A relay ...

See the other products
CIRCUTOR
phase loss protection relay
phase loss protection relay
DMPU series

Carlo Gavazzi offers a range of modular electronic relays to protect, control and monitor the motor. They are very effective for motors which are located in very sensitive positions, in the applications making any failure ...

over-voltage protection relay
over-voltage protection relay
FKM-05

Trigger voltage: 140 V - 300 V

... Adjustable) Reset Time : 0,1sec. - 20sec. (Adjustable) Insufficient Supply Voltage Protection Phase Absence Protection Neutral Absence Protection

See the other products
Tense Electronic
over-voltage protection relay
over-voltage protection relay
FKV-24F

Trigger voltage: 180 V - 500 V

The phase protection relays are designed to protect the three-phase loads from damage caused by mains voltage. High Voltage : 500V Low Voltage : 180V Asymmetry : 11% (Adjustable) ...

See the other products
Tense Electronic
thermal protection relay
thermal protection relay
TRM-03

Tripping current: 0.1 A - 3 A

Digital thermal relays are designed to prevent and control loads from damage due to high current. 0,1A - 3A (Adjustable Overload Value) 50% Fixed Current Asymmetry Error Delay Time Adjustable Operation ...

See the other products
Tense Electronic
overload relay
overload relay
JRS4-d Series

Tripping current: 65 A
Trigger voltage: 220 V

overload relay
overload relay
JRS4-F Series

Tripping current: 140 A - 160 A
Trigger voltage: 220 V

thermal protection relay
thermal protection relay
JRS4-d series

Tripping current: 10 mA

... series thermal overload relay 1. General JRS4-d series Thermal Overload Relay is used in AC circuit 50/60 Hz, rated operational voltage up to AC 660V, for the purpose of the overload protection ...

earth-leakage protection relay
earth-leakage protection relay
ELR-52AS

Trigger voltage: 24, 48, 110, 230 V

ELR-52AS Residual-current protection relay with 2 channels. Latch relays. Events log. RS485 Modbus. Earth differential relay with 2 associated toroidal sensor inputs, ...

See the other products
Contrel elettronica
earth-leakage protection relay
earth-leakage protection relay
ELR-51AS

Trigger voltage: 24, 48, 110, 230 V

ELR-51AS Residual-current protection relay. Latch relays. Events log. RS485 Modbus. TRIP memory feature. Earth differential relay with associated toroidal sensor input, ...

See the other products
Contrel elettronica
power protection relay
power protection relay
ELR-1D

Trigger voltage: 24, 48, 110, 230 V

• Earth leakage relay type A • External toroidal • Green power LED indicator (ON) • Red relay tripped LED indicator (TRIP) • Front TEST and RESET buttons • Modular DIN housing, 1 module, with transparent ...

See the other products
Contrel elettronica
How to choose this product
protection-relay

A protection relay shuts off a machine operating in a way that represents a potential risk to itself.

Applications

These devices supervise the operation of a machine or other installation by measuring current, voltage or phase variations. It shuts off the machine, cuts off power to an installation or triggers an alarm when a parameter exceeds authorized thresholds.

Technologies

As with other relays, electromechanical models exist, though most now are semiconductor-based solid state relays. Some are directly programmable and are in ISO cases for rail installation.

How to choose

Choice of a protection relay depends on the monitored parameters: overcurrent, zero velocity, excessive speed, current consumption, leaks, etc.