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overload relay / phase loss / temperature / adjustable
overload relay

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. The ...

overload relay / adjustable / electronic / for electric motors
overload relay

Electronic overload relays offer reliable and precise protection for motors in the event of overload or phase failure.The electronic overload relay can make up a compact starting solution ...

voltage protection relay / panel-mount
voltage protection relay
1/3 x 19 in | 7SA84

... covered by the line protection system of this device, which comes with a 3-pole tripping system to ensure the best user experience and help you achieve the best results from your project. The overhead lines and cables ...

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SIEMENS Energy Management
voltage protection relay / panel-mount
voltage protection relay
1/3 x 19 - 2/1 x 19 in | 7SA86

... - Distance Protection is a wonder of modern technology. It's key features are Line protection for all voltage levels with 3-pole tripping, Very short tripping time, Also used in switchgear with breaker-and-a-half ...

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SIEMENS Energy Management
voltage protection relay / panel-mount
voltage protection relay
1/3 x 19 - 2/1 x 19 in | 7SA87

... capacitive series compensation for line protection. It is additionally useful in protecting both long and short lines, for adaptive power-swing blocking and detection of CT saturation. Secure serial ...

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SIEMENS Energy Management
phase protection relay / voltage / panel-mount / differential
phase protection relay
1/3 x 19 in | 7SD84

The 7SD84 - Differential Protection is a one of a kind product delivered by SIEMENS. It utilizes adaptive algorithm integrated with differential protection to achieve optimum stability and sensitivity. ...

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SIEMENS Energy Management
phase protection relay / voltage / panel-mount / differential
phase protection relay
1/3 x 19 - 2/1 x 19 in | 7SD86

... compensating coils in the protection zone. Suitable for radial, ring or any type of meshed systems of any voltage level with grounded, compensated or isolated neutral point. Protection of lines with capacities ...

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SIEMENS Energy Management
thermal protection relay / contactor mount / automatic reset / manual reset
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 ...

temperature protection relay / DIN rail / for electric motors
temperature protection relay
CM-MSE series

... DIN 44081) which are suitable for embedding in motor windings. CM-MSE single function thermistor motor protection relay The single function relays are equipped with 1 n/o output contact ...

thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
Z

Tripping current: 0 A - 250 A

The Z product has protection during overload and phase loss. Mounted directly on contactor DIL M up to 250 A, or separately mounted, its auxiliary contacts switch off the motor protection and indicate ...

thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
ZEB series

Tripping current: 0.33 A - 175 A

... tripping classes give optimum protection at differing starting solutions. The motor protection relay can be mounted directly on the contactor DILM, resulting in saving space in the control ...

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

... circuit and zero-voltage safety to ensure reliable fault signalling during supply voltage failure. The EMT 6-DKB can suitably used for every thermistor application for simplified selection, engineering and stock-keeping. ...

thermal protection relay / panel-mount / three-phase / AC
thermal protection relay
RW series

Tripping current: 0 A - 840 A

Overload relays for protection of electric motors up to 840A. Direct mounting with contactors and mini contactors or special bases for separated mounting. Class 10 protection. Features 2P ...

thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
RW_E series

Tripping current: 10 A - 30 A

... meant to assure increased reliability for protection of low voltage three-phase electric motors in sinusoidal 50/60 Hz networks. Description The RW_E is meant to assure increased reliability for protection ...

thermal protection relay / contactor mount / automatic reset / manual reset
thermal protection relay
CWM series

Tripping current: 9 A - 105 A

WEG makes three-pole contactors that works with an easy installation system and are made with enclosed bodies based on VDE 0106 standards. These are UL-approved and made with bodies that can link to one or two conductors.

earth-leakage protection relay / DIN rail / AC/DC
earth-leakage protection relay
IDB-4 series

Earth leakage protection device for the protection of people and property against fault currents, such as: - Sinusoidal alternating currents and pulsating residual direct currents. - Sinusoidal ...

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CIRCUTOR
earth-leakage protection relay / frequency / programmable / digital
earth-leakage protection relay
WRU10 series

... differential protection settings. protection trigger current. protection status messages, etc. Units with three programmable output contact relays, one switched and two ...

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CIRCUTOR
earth-leakage protection relay / current / digital / DIN rail
earth-leakage protection relay
RGU-10 series

Electronic earth leakage protection relay, used to connect to the earth leakage transformers WG / WGC Series Superimmunized Type A relay with high frequency current filtering and high ...

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CIRCUTOR
earth-leakage protection relay / DIN rail / adjustable / differential
earth-leakage protection relay
RG1M series

The RG1M series earth leakage relay is an optimized assembly, suitable for installation at WC, WGS and WCG transformer units. It is designed with type A ultra-immunized mechanism. This electric differential solution is ...

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CIRCUTOR
earth-leakage protection relay / DIN rail / modular
earth-leakage protection relay
WRN series

The WRN-22 is an Earth leakage relay manufactured by Circutor. Consisting of an integrated earth leakage transformer measuring at Ø22mm, it has the ability to identify leakage through sampling the earth leakage ...

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CIRCUTOR
earth-leakage protection relay / AC/DC / high-sensitivity / digital
earth-leakage protection relay
EL731 series

... 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 ...

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

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 / programmable / DIN rail / for generators
arc flash protection relay
AF0500 series

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
arc flash protection relay / current / phase / DIN rail
arc flash protection relay
PGR-8800 series

... -8800 arc-flash relay is UL and cUL listed. It provides dependable detection of developing arc-flash incidents and avoids nuisance tripping. It achieves this by spotting a combination of extra light and current. For arc-flash ...

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Littelfuse
earth-leakage protection relay / insulation / panel-mount / for electric motors
earth-leakage protection relay
PGR-6100 series

... 6100 Series features the Ground-Fault and Insulation Relay designed for general safety of motors. It is used for ground-fault protection and insulation monitoring. Integrated with predictive ...

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Littelfuse
earth-leakage protection relay / DIN rail / adjustable / time delay
earth-leakage protection relay
RESYS M40

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 ...

earth-leakage protection relay / DIN rail / differential
earth-leakage protection relay
RESYS M40R

RESYS M40R are earth leakage relays that are often associated with a remote trip breaking device, offering automatic power breaking and reclosing. In terms of the functionality, the leakage current limitations and protection ...

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.

over-current protection relay / trip circuit / panel-mount
over-current protection relay
SIA-C

... ;D SIA-C overcurrent & earth fault protection relay has 50P, 50N, 51P y 51N protection functions. The self-powered relay starts up from 0.2 times ...

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FANOX ELECTRONIC
over-current protection relay / phase sequence / panel-mount / digital
over-current protection relay
SIA B

SIA-B Dual & Self powered Dual & Self Powered Overcurrent and Earth Fault Protection Relay for Secondary Distribution. Protection functions: 50P, 50/51P, 50N, ...

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FANOX ELECTRONIC
over-current protection relay / trip circuit / single-phase / panel-mount
over-current protection relay
SIA-A

The SIA-A series of Self or Dual powered Overcurrent and Earth Fault Protection Relays from FANOX can keep track and record up to a hundred events. These machines are capable of providing ...

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FANOX ELECTRONIC
over-voltage protection relay / panel-mount / digital / programmable
over-voltage protection relay
SIA-F

Protection functions: 50P, 50/51P, 50N/G, 50/51 N/G, CLP and 86. Optionally 52, 50BF, 49, 49T and Trip block for Switch disconnector. Auxiliary supply (110-230 Vac / 90-300 Vdc or 24-48 Vdc). Compact size ...

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FANOX ELECTRONIC
insulation protection relay / over-current / panel-mount / digital
insulation protection relay
SIA-D

The overcurrent and earth fault protection relay is suitable for secondary distribution. The protection functions available are 50P, 50G/N, 51P, 51G/N and 52, while the ...

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FANOX ELECTRONIC
arc flash protection relay / 4NO / AC/DC
arc flash protection relay
1728

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 ...

panel-mount protection relay / AC/DC
panel-mount protection relay
EPRA

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 / panel-mount / AC/DC
voltage protection relay
EPK

... 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 / digital / programmable / panel-mount
over-current protection relay
CGI 14N/C

... and software, accompanies it. The relay is integrated with IDMT function. The relay are extremely safe and can provide quick protection against one or both over current ...

under-voltage protection relay / over-voltage / digital / programmable
under-voltage protection relay
CGV 24N/C

... processor (DSP). A noted feature of the relay is its Definite Time Lag (DTL). The second is that it can be field programmed to ensure protection; hence fitted with Under voltage / Over Voltage and Neutral ...

frequency protection relay / digital / panel-mount
frequency protection relay
CGI 14S

SELF POWERED FEEDER PROTECTION RELAY Product Overview The ‘CGI 14S' Self Powered Numerical Protection Relay is designed for use in unmanned substation where ...

motor protection relay / current
motor protection relay
MS32 series

Motor Protection Switches - MS32 Versions Professional range of motor protection switches from the MS32 series. The switches can be either vertically or horizontally mounted onto 35 mm DIN Rail. The ...

voltage protection relay / for recloser control / transmission line
voltage protection relay
SEL-311C

Transmission Protection System Apply the SEL-311C Relay for protection, reclosing, monitoring, and control of transmission lines. Features include a four-shot recloser, patented capacitance ...

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Schweitzer Engineering Laboratories
phase sequence protection relay / multifunction / transmission line
phase sequence protection relay
SEL-411L

Advanced Line Differential Protection, Automation, and Control System Apply the SEL-411L Relay for complete protection and control of any transmission line. The SEL-411L provides differential ...

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Schweitzer Engineering Laboratories
speed protection relay / digital / programmable / configurable
speed protection relay
SEL-T400L

Time-Domain Line Protection Apply the SEL-T400L Relay for ultra-high-speed and secure protection of critical lines. With breakthrough time-domain technologies, the SEL-T400L securely ...

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Schweitzer Engineering Laboratories
voltage protection relay / digital / programmable / configurable
voltage protection relay
SEL-421

Protection, Automation, and Control System Apply the SEL-421 Protection, Automation, and Control System for high-speed distance and directional protection and complete control of a two-breaker ...

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Schweitzer Engineering Laboratories
digital protection relay / voltage / programmable / configurable
digital protection relay
SEL-311C

Transmission Protection System Apply the SEL-311C Relay for protection, reclosing, monitoring, and control of transmission lines. Features include a four-shot recloser, patented capacitance ...

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Schweitzer Engineering Laboratories
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 ...

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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 ...

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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 ...

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Tense
overload relay / DIN rail / three-phase / automatic reset
overload relay
TRM-20

Tripping current: 8 A - 20 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 ...

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Tense
overload relay / DIN rail / three-phase / automatic reset
overload relay
TRM-200

Tripping current: 90 A - 200 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 ...

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Tense
power protection relay / differential
power protection relay
ELR-1D

• 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 / flush-mount / panel-mount
earth-leakage protection relay
ELR-1E

The ELR 1E is a elementary unit of the latest series which is used mainly to decrease flush mounting ELR option, other than any other option. The most creative feature of the product is its decreased depth ( 60 mm which includes terminals). ...

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Contrel elettronica
earth-leakage protection relay / panel-mount / differential
earth-leakage protection relay
ELR-2

ELR-2 is a dual-output changeover contact, one could be utilized for detachment and the other for a caution capacity at 70% of the set current (the determination of the working sort of the second contact is, no doubt made by method for ...

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Contrel elettronica
earth-leakage protection relay / panel-mount / differential
earth-leakage protection relay
ELR-2M

Contrel ELR-2M has ELR connected with mechanical signalisation. This allows it to maintain details of a tripped relay, even without auxiliary supply. Thus the risky inconvenience of having the door open on an energized ...

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Contrel elettronica
earth-leakage protection relay / modular / DIN rail / differential
earth-leakage protection relay
ELR-3C

... transmissions offer lifelong regulation of the Toroidal - ELR orbit. Any disturbance to this orbit can facilitate instant trip of security and enables you to recognize the anomaly without having a timely regulation done ...

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Contrel elettronica
thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
JRS1 Series

Tripping current: 0.16 A - 80 A

JRS1 series thermal over-load relay is suitable for the circuit of AC50~60Hz, rated operating voltage Ue: 380V, rated current 0.1~80A, as the use of over-load and break phase protection ...

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PEOPLE ELE. APPLIANCE GROUP CO., LTD.
thermal protection relay / panel-mount / three-phase / AC
thermal protection relay
JR36 Series

Tripping current: 0.35 A - 160 A

... bimetal type thermal over-load relay is suitable for the circuit of AC 50Hz, rated operating voltage Ue: AC 690V, current of 0.25~160A, as the use of over-load and break phase protection for the ...

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PEOPLE ELE. APPLIANCE GROUP CO., LTD.
thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
RDR6 series

Tripping current: 0.1 A - 93 A

... over-load relay is suitable for the circuit of AC50Hz/60Hz, rated operating voltage Ue: 380V, rated impact voltage Uimp (kV): 8, rated current 0.10~93A, as the use of over-load, break phase and protection ...

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PEOPLE ELE. APPLIANCE GROUP CO., LTD.
thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
RDJ2 Series

Tripping current: 0.1 A - 630 A

... of this thermal relay is the same with LR2 series thermal relay, therefore, LR2 series thermal relay can be entirely replaced by RDJ2 series thermal relay. Thermal relay ...

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PEOPLE ELE. APPLIANCE GROUP CO., LTD.
thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
JRS8 Series

Tripping current: 0.1 A - 500 A

... series thermal relay) bimetal type thermal over-load relay is suitable for the power system of AC50Hz or 60Hz, rated operating voltage Ue: 660V, current 0.1~500A, as the use of over-load and break phase ...

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PEOPLE ELE. APPLIANCE GROUP CO., LTD.
thermal protection relay / panel-mount
thermal protection relay
T-154

Temperature relay T-119 for dry type transformer temperature monitoring

earth-leakage protection relay / panel-mount / DIN rail / digital
earth-leakage protection relay
X72DD

The X...DD series earth leakage relays are designed to measure the leakage or unbalance currents caused by conductors or appliances insulation losses and to react, in case the set limits are exceeded, switching off the ...

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FRER
earth-leakage protection relay / panel-mount / DIN rail / digital
earth-leakage protection relay
X96DD

The X...DD series earth leakage relays are designed to measure the leakage or unbalance currents caused by conductors or appliances insulation losses and to react, in case the set limits are exceeded, switching off the ...

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FRER
earth-leakage protection relay / panel-mount / DIN rail / digital
earth-leakage protection relay
X70DD

The X...DD series earth leakage relays are designed to measure the leakage or unbalance currents caused by conductors or appliances insulation losses and to react, in case the set limits are exceeded, switching off the ...

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FRER
earth-leakage protection relay / panel-mount / DIN rail / digital
earth-leakage protection relay
X48DS

The X48DS series earth leakage relays are designed to measure the leakage or unbalance currents caused by conductors or appliances insulation losses and to react, in case the set limits are exceeded, switching off the ...

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FRER
earth-leakage protection relay / panel-mount / DIN rail / digital
earth-leakage protection relay
X72DS series

The X72DS series earth leakage relays are designed to measure the leakage or unbalance currents caused by conductors or appliances insulation losses and to react, in case the set limits are exceeded, switching off the ...

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FRER
thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
JR28N series

Tripping current: 0.1 A - 93 A

... Bolevo, is a thermal relay created to provide a reliable protection for motors in terms of overloading and equipment failures. It is equipped with a differential method, temperature reparation and an ...

thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
LR1-D series

Tripping current: 0.1 A - 80 A

The LR1-D series is manufactured by Bolevo, and is a thermal relay that is ideal to use as a thermal protection in the circuit with a frequency that ranges from 50 Hz up to 60 Hz. The unit is also ...

thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
LR2-D series

Tripping current: 0.16 A - 93 A

Bolevo's LR2-D is composed of a series of thermal relay which is specifically used for a 50Hz or 60Hz circuit. The LR2-D also has a rated insulation voltage of 600V. It has a 0.1-93A current mainly used in preventing ...

thermal protection relay / automatic reset / three-phase / contactor mount
thermal protection relay
JR26 series

Tripping current: 0.1 A - 30 A

... LR7 from Bolevo are thermal relays that are specially engineered with an overload-protected AC motor that is capable of 8 continuous hours of operation. These multi-functional thermal relays ...

thermal protection relay / contactor mount / automatic reset / manual reset
thermal protection relay
JR29 series

Tripping current: 0.1 A - 500 A

The JR29 series is manufactured by Bolevo, and is a thermal overload relay which is ideal to use in AC voltage electric power systems as a protections of overload and phase-lacking in circuits with three-phase ...

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.