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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 / 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 / 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 / 1 NC / 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 / 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

... products also ATEX approvals for use in hazardous areas are availabe. ABB also offers PTC temperature sensors C011 (according to DIN 44081) which are suitable for embedding in motor windings. CM-MSE single function thermistor ...

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.

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

All voltage levels are 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 ...

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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

... selective protection of overhead lines. It is suitable for radial, ring or any type of meshed systems of any voltage level. Grounded, compensated or isolated neutral points can be used in conjunction with this machine. ...

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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
motor protection relay / power
motor protection relay

Motor Protection Unit The motor protection unit (MPU), thanks to its compact design can be located inside the motor terminal box. MPU is used to check and monitor: the current drawn by the motor the ...

over-current protection relay / panel-mount
over-current protection relay
SIL-D OC&EF Directional Protection Relays

SIL-D relay protects against directional earth faults. It offers protection for neutral currents and optionally for installations with isolated neutral system. MAIN CHARACTERISTICS: Overcurrent ...

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

... Dual & Self Powered Overcurrent Protection Relay using the operating current through three specific current transformers fitted on the lines. These transformers are also used to obtain ...

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

The SIA-C is an Overcurrent Protection Relay with SELF-POWERED and Dual Powered (self+auxiliary) models. The relay SIA-C gets its supply from the current lines through ...

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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
over-voltage protection relay / panel-mount / digital / programmable
over-voltage protection relay
SIL-A

Many Protection functions by default: 50P(2), 50N/G(2)(*), 50/51P, 50/51 N/G(*), 50BF, 46, 52, 79, 74TCS, COLD LOAD PICK-UP, 86, 49T . Optionally 49, 74CT, 37, 46BC, Trip Block for switch disconnector. SIL-A ...

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

... emergency stop module UF 6925 of the SAFEMASTER series monitors safety functions such as emergency stop or safety door safely and simply in nearly every application and is characterised by maximum safety ...

arc flash protection relay / 4 NO / 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, ...

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 / 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 / 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 / DIN rail / modular / adjustable
earth-leakage protection relay
RGE series

The RGE Series consisting of electronic earth leakage protection relays are specifically made to connect to the WG or WGC earth leakage transformers Series. It is a highly dependable product with sensitivity ...

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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 / 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 add low-level ground-fault ...

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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 ...

under-current protection relay / over-voltage / earth-leakage / temperature
under-current protection relay
FPC 200, Protection relay

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 ...

thermal protection relay / under-voltage / over-voltage / earth-leakage
thermal protection relay
FPC 400

Tripping current: 5, 1 A

FPC 400 is a family of current and voltage digital protection relays with easy to use interface meant for variety of solutions in industry and power distribution. Its robust design enables it to be placed ...

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 ...

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

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SELEC Controls Pvt. Ltd.
over-voltage protection relay / under-voltage / phase sequence / phase unbalance
over-voltage protection relay
VPRA2M

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SELEC Controls Pvt. Ltd.
over-voltage protection relay / under-voltage / phase sequence / phase loss
over-voltage protection relay
900VPR-BL-U-CE

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SELEC Controls Pvt. Ltd.
over-voltage protection relay / under-voltage / phase sequence / digital
over-voltage protection relay
VPRD2M

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SELEC Controls Pvt. Ltd.
over-current protection relay / under-current / digital / time delay
over-current protection relay
900CPR-1-1

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SELEC Controls Pvt. Ltd.
protection relay
protection relay
ELR-D2-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
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
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
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
over-current protection relay / safety / 1 NC / 2 NO
over-current protection relay
MCR-225

... 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 ...

overload relay / DIN rail / three-phase / automatic reset
overload relay
KON-TER 25

Tripping current: 1 A - 25 A

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Tense
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
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 Relay ...

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

Tripping current: 0 A - 30 A

... 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
earth-leakage protection relay / flush-mount / panel-mount / IEC
earth-leakage protection relay
DER3/0E

Tripping current: 0.03 mA - 30000 mA

The DER3/0D model engineered by Dossena, is an earth leakage differential relay intended for low voltage networks in AC type TT and TN modes. It can also be utilized on LV networks in an alternating current. In addition, ...

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DOSSENA
earth-leakage protection relay / IEC / differential / panel-mount
earth-leakage protection relay
DER3/0I

Tripping current: 0.03 mA - 30000 mA

The Differential relays range DER3 Dossena can be used on low voltage networks in AC type TT and TN. They allow you to achieve adequate selectivity and differential protection thanks to the adjustment ...

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DOSSENA
earth-leakage protection relay / IEC / DIN rail / digital
earth-leakage protection relay
DER3/1D

Tripping current: 0 A - 30 A

... 1DL is specifically used on LV networks in the TT and TN types of current. It offers a wide range of options in different protections due to the wide adjustment of current dispersion and threshold for a delayed 10-second ...

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DOSSENA
earth-leakage protection relay / DIN rail / IEC / differential
earth-leakage protection relay
DER3/1DL

... production. Dossena offers a wide range of earth differential relays future-rich. The user-friendly relays are designed with high reliability, high performance, simple installation and setting. large ...

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DOSSENA

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.