Protection relays

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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 ...

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 ...

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Littelfuse
arc flash protection relay
arc flash protection relay
AF0500 series

Trigger voltage: 110, 250, 100, 240 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 protection relay
phase protection relay
PGR-8800 series

Trigger voltage: 12, 48, 120, 240 V

... -8800 is a microprocessor-based relay that limits arc-fault damage by detecting the light from an arc flash and rapidly tripping. Phase-current-transformer inputs are provided for current-constrained arc-flash protection ...

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Littelfuse
electric motor protection relay
electric motor protection relay
RW_E series

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

... the contactors or on an individual base, the RW_E electronic overload relays provide protection for electric motors up to 840 A. Main characteristics •Incorporated protections: overload, ...

thermal protection relay
thermal protection relay
JRS4-09d

... 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 ...

current protection relay
current protection relay
PISA11.401

Tripping current: 1 A
Trigger voltage: 24 V

Protection module One input and four current controlled outputs NEC Class2 compliant Ensures sufficient supply voltage for critical loads even in the event of a fault Protects small cable sizes against overload Hassle-free ...

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PULS GmbH
thermal protection relay
thermal protection relay
SR-T series

Trigger voltage: 24 V - 550 V

... applications, from switchboards to machines requiring high reliability. Electromagnetic relays with improved reliability and usability. Can be used as a relay for operating contactors. Multiple contact ...

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MITSUBISHI Automation
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 ...

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Danfoss Industrial Automation
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 ...

electric motor protection relay
electric motor protection relay
C440

Tripping current: 0.3 A - 1,500 A
Trigger voltage: 690 V

Increased flexibility, enhanced protection The C440/XTOE electronic overload relay delivers enhanced motor protection and communications capabilities in a single compact device, directly ...

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Eaton Count Control Products
safety protection relay
safety protection relay
ESM-BA201

Tripping current: 20 mA
Trigger voltage: 24 V

... start with automatic start or a start button • Monitoring of downstream relays or contactors. • Simultaneity monitoring to monitor safety components over time • Relay start using a ...

safety protection relay
safety protection relay
MSC-CE-AC-FI8FO2-121290

Tripping current: 0 A - 0.4 A
Trigger voltage: 24 V

... • 4 test outputs for monitoring for short circuits and overload states • 2 monitoring outputs programmed via the EUCHNER Safety Designer software • Scope of delivery • The expansion plug (order no. 121308) is ...

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 ...

grid and system protection relay
grid and system protection relay
NA003-M64

Trigger voltage: 24, 110 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, ...

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 ...

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CIRCUTOR S.A.
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 ...

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CIRCUTOR S.A.
earth-leakage protection relay
earth-leakage protection relay
CBS4 series

Tripping current: 0.03 A - 30 A

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 S.A.
earth-leakage protection relay
earth-leakage protection relay
X52UL6

COMBI-6 Type A & F MULTI-CHANNEL EARTH LEAKAGE RELAY The Multichannel earth leakage relays COMBI 6 have been designed for the monitoring and protection of up to 6 independent systems. ...

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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 ...

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FRER
earth-leakage protection relay
earth-leakage protection relay
X72DSX

... 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
under-current protection relay
under-current protection relay
FPC 200

Tripping current: 0.3 A - 30 A

... and prepared software for 4 main protection groups as feeder protection, transformer protection, motor protection and busbar protection. Every groupd ...

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Iskra d.d.
motor protection relay
motor protection relay
RX series

Tripping current: 1 A - 2,000 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. ...

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 ...

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 ...

thermal protection relay
thermal protection relay
RF9, RFA9, RFN9, RFNA9 series

Tripping current: 0.09 A - 7.5 A

FOR BG SERIES MINI-CONTACTORS Type RF9, phase failure sensitive, manual resetting Type RFA9, phase failure sensitive, automatic resetting Type RFN9, non-phase failure sensitive, manual resetting Type RFNA9, non-phase failure sensitive, automatic ...

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LOVATO ELECTRIC
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 ...

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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 ...

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FANOX ELECTRONIC
earth-leakage protection relay
earth-leakage protection relay
SIA-C

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
earth-leakage protection relay
earth-leakage protection relay
RESYS M40

Tripping current: 0.03 A - 30 A

The Resys M40 is a type A differential relay manufactured by Socomec. Integrated with a remote trip breaking device, it provides an indirect contact protection and a leakage current limitation. Designed ...

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SOCOMEC
insulation protection relay
insulation protection relay
DCG-UBCH2

Tripping current: 5 A
Trigger voltage: 250 V

GYDCG-UBCH2 series products are used for on-line monitoring dc floating land system is thecathode of insulation resistance of thedevice, it is based on the principle of unbalanced bridge, toavoid the balance bridge across the electrodes ...

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Chongqing Blue Jay Technology Co. Ltd
current protection relay
current protection relay
ZJJ series

ZJJ DC insulation monitoring relay monitorsthe insulation of the DC bus, and it sendsalarm signal when the bus-to-groundinsulation drops to a certain value,also it ispanel mounted type,and the relay has ...

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Chongqing Blue Jay Technology Co. Ltd
arc flash protection relay
arc flash protection relay
AFR-S

... connected to one relay. It used to limits damages to equipment, improve safety, avoid and protect personnel injuries. It’s also can be used as a stand-alone arc protection relay or ...

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Chongqing Blue Jay Technology Co. Ltd
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 ...

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Contrel elettronica
earth-leakage protection relay
earth-leakage protection relay
ELR-1E

Trigger voltage: 12 V - 415 V

... Adjustable tripping and delay time. Earth leakage relay with 1 operation threshold, flush mount. External CT. Introduction Range ELR Product name ELR-1E Product type Residual current protection ...

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Contrel elettronica
earth-leakage protection relay
earth-leakage protection relay
ELR-2

Trigger voltage: 24, 48, 110, 240, 415 V

... indicator (TRIP). Fail safe. Earth leakage relay with 2 operation thresholds, flush mount. External CT. Fail safe. Introduction Range ELR Product name ELR-2 Product type Residual current protection ...

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Contrel elettronica
earth-leakage protection relay
earth-leakage protection relay
DER3BDUAL/2I

Tripping current: 0.06 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
earth-leakage protection relay
DER3BDUAL/6D

Tripping current: 0.06 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
differential protection relay
differential protection relay
DER3/0D

Tripping current: 0.03 A - 30 A
Trigger voltage: 48 V - 400 V

The earth differential relays range DER3, can be used on LV networks in alternate current, type TT and TN. They guarantee an adequate selectivity of differential protection thanks to : wide adjustment ...

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DOSSENA
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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.