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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.

earth-leakage protection relay / 1 NO/NC / panel-mount / high-sensitivity
earth-leakage protection relay
EL731 series

Trigger voltage: 120, 240, 24, 48 V

... over-temperature protection. EL731 also offers metering capabilities, along with trip settings and a password protected alarm, along with optional network communications. The product is also used to add low-level ground-fault ...

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Littelfuse
level protection relay / for generators
level protection relay
PGR-4300 series

Trigger voltage: 120, 12, 24 V

The PGR 4300 is a generator protection relay by Littlefuse. The unit functions as a simple device for alarming that the condition is ground fault without using any transformers. Using this, it makes the ...

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Littelfuse
arc flash protection relay / 1 NO/NC / for generators / for motors
arc flash protection relay
AF0500 series

Trigger voltage: 100, 240, 110, 250 V

The AF0500 is a microprocessor-based arc-flash protection relay that limits arc-fault damage by detecting the light from an arc flash and rapidly tripping the feeder breaker. The unit is well suited for ...

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Littelfuse
phase loss protection relay / thermal / for motors / three-phase
phase loss protection relay
ZEB, Z series

... 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 ...

overload relay / temperature / 1 NC / three-phase
overload relay
EMT6 series

The EMT6 thermistor overload relay protects machines against overtemperatures during severe starting duty, braking duty, undervoltage and overvoltage and high switching frequency. When using these relays, ...

voltage protection relay / high-voltage / panel-mount
voltage protection relay

Eaton delivers sophisticated power protection for low- and medium voltage applications. Protective Relays provide you with unique microprocessor-based devices that eliminate unnecessary ...

thermal protection relay / for motors / three-phase / panel-mount
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 ...

over-voltage protection relay / AC/DC / DIN rail
over-voltage protection relay
Series 9079

Series 9079 Over-voltage protectors for applications up to 100 V DC, or 75 V AC based on varistor technology are available as single components.

thermal protection relay / phase loss / for motors / manual reset
thermal protection relay
TI 9C-5 series

Tripping current: 3.2 A - 4.8 A

... 9C-5, Thermal overload relaysThermal overload relay TI 9C-5 is used with minicontactor CI 5 – for protection of squirrel cage motors where compactness is required. The relay have single ...

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Danfoss Industrial Automation
thermal protection relay / compact / motor / manual reset
thermal protection relay
TI C 16-30 series

Tripping current: 0.13 A - 32 A

TI C (16-30 series), Thermal overload relaysThe thermal overload relays TI 16C-30C cover the range from 0.13-32 Amp and protect squirrel cage motors of up to 15 kW against overload. The phase failure function accelerates ...

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Danfoss Industrial Automation
thermal protection relay / compact / for motors / manual reset
thermal protection relay
TI 80-86 series

Tripping current: 16 A - 85 A

TI (80-86 series), Thermal overload relaysThe thermal overload relays TI 80-86 cover the range from 16-85 Amp and protect squirrel cage motors of up to 45 kW against overload. For use with contactors CI 32 to CI 86 Compact ...

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Danfoss Industrial Automation
safety protection relay / with guided contacts
safety protection relay
G7SA series

Tripping current: 6 A

Relays with forcibly guided contactsThe slim G7SA relay family with forcibly guided contacts is available as a four or six-pole type in various contact combinations and offers reinforced insulation. Terminals ...

safety protection relay / compact
safety protection relay
G7S series

Tripping current: 6, 10 A

Relays with forcibly guided contactsThe slim G7S-_-E relay family with forcibly guided contacts is available as a six-pole type in two different contact combinations. Terminals are arranged for easy PCB ...

differential protection relay / earth-leakage / DIN rail / flush-mount
differential protection relay

The X...DB3 series earth leakage relays type B are designed to measure the DC, AC and high frequency leakage current. Thanks to their distinctive feature (the displaying of the leakage current) it is possible to continuously ...

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FRER
earth-leakage protection relay / DIN rail / flush-mount / automatic reset
earth-leakage protection relay
X48DS

... 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 ...

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FRER
earth-leakage protection relay / flush-mount / automatic reset
earth-leakage protection relay
X72DS series

... 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 ...

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FRER
over-current protection relay / configurable / AC/DC / compact
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 ...

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FANOX ELECTRONIC
phase sequence protection relay / over-current / earth-leakage / panel-mount
phase sequence protection relay
SIA B Specific CT's

Trigger voltage: 24, 110, 230 V

... powered Overcurrent and Earth Fault Protection Relays, using the operating current through three specific current transformers fitted on the lines. Thanks to this adaptation the SIA-B ...

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FANOX ELECTRONIC
over-current protection relay / earth-leakage / trip circuit / panel-mount
over-current protection relay
SIA-C Self powered Relay

SIA-C Relays are Dual & Self powered overcurrent and earth fault Protection Relays, that obtein the energy to power itself tanks to STANDARD CURRENT TRANSFORMES on the ...

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FANOX ELECTRONIC
emergency stop protection relay / safety
emergency stop protection relay
SAFEMASTER | UF 6925

... emergency stop module UF 6925 is suitable to protect men and machine by safety related enabling or disabling of a safety circuit. It is used in applications with e-stop buttons and safety ...

earth-leakage protection relay / differential / adjustable / electronic
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 ...

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CIRCUTOR
earth-leakage protection relay / adjustable / modular / electronic
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 ...

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CIRCUTOR
earth-leakage protection relay / DIN rail / programmable / digital
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 ...

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CIRCUTOR
arc flash protection relay / 4 NO / AC/DC
arc flash protection relay
1728

Tripping current: 10 A
Trigger voltage: 48, 220 V

The 1728 model assembled by Tec Automatismes, is a monostable fast acting electromechanical relay that features a 4 RT 10A contact. This device consists of a ≤4ms coil energization closing make contact. Moreover, its ...

4 NO/NC protection relay / panel-mount / AC/DC
4 NO/NC protection relay
EPRA

Tripping current: 7 A
Trigger voltage: 12, 230, 380 V

The EPRA Latching relay consist of a magnetic hold function that can be plugged on a socket. It features a contact of 4RT -7A and a coil of 12-24-48-125-230V AC/DC 380 VAC. The product provides a climatic protection ...

voltage protection relay / 2 NO/NC / panel-mount / AC/DC
voltage protection relay
EPK

Trigger voltage: 12, 230, 380 V

... series flashing relay with fixed rhythm features two RT contacts up to 5 A, a coil from 12 to 230 V DC, or 12 to 380 V AC, with flashing frequency from 60 to 120 beates/min at rV. It also contains a pluggable-on socket, ...

over-current protection relay / safety / 1 NC / 2 NO
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 ...

motor protection relay / power
motor protection relay

level protection relay / electronic
level protection relay
Simultaneous Alternating relay AR02

Electronic relay designed to alternate 2 different outputs (pumps, compressors...) controlled by an external signal. Alternates cyclically between 2 outputs. Possible operation of both outputs at the same time (simultaneous). - ...

level protection relay / DIN rail
level protection relay
Simultaneous Alternating relay AR03

Electronic relay designed to alternate 3 different outputs (pumps, compressors...) controlled by an external signal. Alternates cyclically between 3 outputs. Possible operation of all 3 outputs at the same time (simultaneous). - ...

phase unbalance protection relay / phase loss / DIN rail / for motors
phase unbalance protection relay
RF01

Aimed to protect motors where phase sequence is specially relevant (lifts, cranes, escalators,..) or phase failure can be specially damaging.

safety protection relay / DIN rail / IEC
safety protection relay
D5000 series

Tripping current: 4, 10 A
Trigger voltage: 24 V

... common circuitry. Single channel versions available if required, to provide single loop integrity on Emergency Shut Down and Fire & Gas applications. Configuration components are easily accessed by removing cover. DIP ...

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G.M. International srl
safety protection relay / 2 NC / IEC / DIN rail
safety protection relay
D5090S-086

Tripping current: 5 A

5 A SIL 3 RELAY OUTPUT MODULE FOR NE LOAD DESCRIPTION The single channel Relay Output D5090S-086 is a relay module suitable for the switching of safety related circuits, ...

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G.M. International srl
safety protection relay / SPDT / IEC / DIN rail
safety protection relay
D5091S

Tripping current: 5 A

5 A SIL 3 RELAY OUTPUT MODULE FOR ND LOAD WITH ND OR NE RELAY CONDITION DESCRIPTION The single channel Relay Output, D5091S is a relay module suitable for the switching ...

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G.M. International srl
current protection relay / IEC / programmable / Ethernet
current protection relay
B-PRO Bus Protection Relays

The B-PRO relays provide low impedance differential protection for any bus bar configuration with CT saturation security, integrated breaker failure, overcurrent protection ...

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ERLPhase
current protection relay / voltage / frequency / multifunction
current protection relay
F-PRO Feeder Protection & Management Relays

... family of numerical multifunction relays provide complete feeder protection with a wide range of protection functions suitable for transmission, distribution and industrial applications. ...

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ERLPhase
transmission line protection relay / voltage / for generators / IEC
transmission line protection relay
L-PRO 4000

... microprocessor-based line distance protection system that provides comprehensive distance based line protection for medium to extra-high-voltage transmission lines. Apply the L-PRO for high-speed distance ...

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ERLPhase
power protection relay / 1 NO/NC / differential
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 ...

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Contrel elettronica
1 NO/NC protection relay
1 NO/NC protection relay
ELR-D2-V

Trigger voltage: 110, 240 V

... leakage relay with 2 operation thresholds, 2 module, external ct, LCD display, RS485 communication interface. GENERAL CHARACTERISTICS • True RMS • Earth leakage relay type A • External toroidal • ...

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Contrel elettronica
current protection relay / earth-leakage / DIN rail / automatic reset
current protection relay
ELR-3A

Trigger voltage: 240 V

Earth Differential Relay Type A • earth leakage current measurement by external toroidal gearbox • measurement in true effective value (trms) • programming and display via a backlit LCD display - fault current (red ...

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Contrel elettronica
overload relay / phase loss / single-phase / for motors
overload relay
MBS series

The MBS Series, manufactured by Vostermans Ventilation, is a motor protective circuit breaker that is suitable for eliminating the need for a motor reload relay. It is equipped with a rated current of ...

overload relay / DIN rail / three-phase / automatic reset
overload relay
TRM-400

Tripping current: 290 A - 400 A

Digital Overload Relays are designed to protect the devices having precise operating current values against the errors likely to arise from excessive current. Descriptions: There are High (Overload Relay ...

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Tense
overload relay / DIN rail / three-phase / automatic reset
overload relay
TRM-10

Tripping current: 0.1 A - 10 A

Digital Overload Relays are designed to protect the devices having precise operating current values against the errors likely to arise from excessive current. Descriptions: There are High (Overload Relay ...

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Tense
overload relay / DIN rail / three-phase / automatic reset
overload relay
TRM-300

Tripping current: 190 A - 300 A

Digital Overload Relays are designed to protect the devices having precise operating current values against the errors likely to arise from excessive current. Descriptions: There are High (Overload Relay ...

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Tense
over-voltage protection relay / under-voltage / single-phase / DIN rail
over-voltage protection relay
600VPR-1

Trigger voltage: 170 V - 290 V

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SELEC Controls Pvt. Ltd.
phase sequence protection relay / over-voltage / under-voltage / single-phase
phase sequence protection relay
600VPR

Trigger voltage: 310 V - 520 V

... under-voltage and over-voltage protection relay that can be installed in a standard DIN rail measuring 17.5 mm. It is integrated with three wire inputs that cater to wires with a diameter of 3 mm. This ...

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SELEC Controls Pvt. Ltd.
phase sequence protection relay / phase loss / phase unbalance / over-voltage
phase sequence protection relay
900VPR-2

Trigger voltage: 280 V - 520 V

... frequency monitoring, - Asymmetry , phase failure & phase sequence monitoring, - RMS value measurement, - Two separate alarm relays

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SELEC Controls Pvt. Ltd.
earth-leakage protection relay / digital / differential / panel-mount
earth-leakage protection relay
DER3BDUAL/2I

Tripping current: 0.05 A - 7 A

DER3B DUAL – UNIVERSAL relay type B. Dossena presents the new DER3B DUAL series, the new generation of earth differential relays. The earth differential relays DER3B DUAL series ...

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DOSSENA
earth-leakage protection relay / DIN rail / digital / AC/DC
earth-leakage protection relay
DER3BDUAL/6D

Tripping current: 0.05 A - 7 A

DER3B DUAL – UNIVERSAL relay type B. Dossena presents the new DER3B DUAL series, the new generation of earth differential relays. The earth differential relays DER3B DUAL series ...

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DOSSENA
current protection relay / earth-leakage / DIN rail / IEC
current protection relay
DER3/0D

Tripping current: 0.03 mA - 30,000 mA

... regulations. With this design, it meet the expectation to have a double need which are the safety of facility and the continuous service of industrial production. The relay consist of one intervention ...

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DOSSENA
motor protection relay / voltage / phase sequence / current
motor protection relay
MPR-100

Motor Protection Relay The device has been designed for continuous monitoring of electrical parameters in low voltage systems. It allows direct, close-distance or remote monitoring via RS-485 and bluetooth ...

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Orion Italia
phase protection relay / over-current / earth-leakage / panel-mount
phase protection relay
IPR-A

Phase Over-Current & Ground Fault Relay Current Protection Relay IPR-A is designed to protect medium voltage lines against over-current and short circuit scenarios present in line fault ...

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Orion Italia
over-voltage protection relay / over-current / phase sequence / IEC
over-voltage protection relay
SMPR-1

... voltage (50) Instantaneous phase overcurrent (50N/50G) Instantaneous ground overcurrent Overload alarm pickup level (51) Inverse time phase overcurrent (51N/51G) Inverse time ground ...

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Orion Italia
arc flash protection relay / panel-mount
arc flash protection relay
19 - 256 V | VAMP 120

... for 2 zones and possibility for generator set emergency trip (separate contact) Operation time 7 ms (including the output relay) Non-volatile trip status

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Vamp
arc flash protection relay / panel-mount
arc flash protection relay
VAMP 121

... Supports point or smoke sensors Up to 10 sensors Typically trips the incoming feeder Operation time 9 ms (including the output relay)

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Vamp
arc flash protection relay / programmable / panel-mount
arc flash protection relay
VAMP 221

... I/O units Indication of arc sensor / current channel and trip relay activation 3-phase current measurement or 2-phase and earth-fault current measurement Circuit-breaker failure protection (CBFP) Operation ...

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Vamp
arc flash protection relay / trip circuit / 1 NC / 3 NO
arc flash protection relay
AQ-101

... more complex arc protection system through the binary bus. Features: Wide range power supply (18-72Vdc or 80-265Vac/dc) Max 12 arc light point sensors Max 1 fiber loop sensor (option) 4 trip relays ...

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Arcteq Relays Ltd
arc flash protection relay / trip circuit / 1 NC / 2 NO
arc flash protection relay
AQ-101S

AQ 101S is a sophisticated micro-processor based arc flash protection unit for arc light detection. It is designed to minimize the damage caused by an arcing fault (arc flash) by tripping the circuit breaker sourcing ...

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Arcteq Relays Ltd
arc flash protection relay / trip circuit / 1 NC / 3 NO
arc flash protection relay
AQ-102

AQ 102 is a sophisticated micro-processor based arc flash protection unit for arc light detection. It is designed to minimize the damage caused by an arcing fault (arc flash) by tripping the circuit breaker sourcing the ...

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Arcteq Relays Ltd

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.