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Protection relays
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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 ...
Littelfuse
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 ...
Littelfuse
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 ...
Littelfuse
Tripping current: 15 A
... 3CR series current type motor starting relay is designed for single-phase AC applications with motor start winding currents up to 15 Amps. It is applicable on both split phase and capacitor start motors. The 3CR relay ...
Tripping current: 25 A
KLIXON® 4CR current type motor starting relay is a compact, high capacity relay, designed for universal application to split phase and capacitor start, single-phase motors with start-winding currents ...
RIS2 PROTECTION RELAY FOR DISTRIBUTION OIL TRANSFORMERS The RIS2 protection relay is a safety detector for distribution transformers. It's an essential ...
T-119 protective relay for monitoring the windings of your electrical transformer Temperature relay with T-119 The T119 is a unit developed to monitor the temperature of MV cast ...
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 ...
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 ...
Trigger voltage: 80 V - 230 V
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 ...
Tripping current: 1 A - 5 A
Trigger voltage: 24 V - 230 V
SIR-A Overhead Control / RTU & Feeder Protection The Fanox SIR-A is the Relay that offers the complete solution for Recloser Control and Feeder Protection with current, voltage, ...
FANOX ELECTRONIC
Trigger voltage: 120, 230 V
... is composed of multirange electric modular relays. It is specifically designed for direct pulse currents. Its delay time and sensitivity can be adjusted, with near-immunity to external interruptions. The relay ...
FANOX ELECTRONIC
Trigger voltage: 230, 24 V
... and in general to protect motors which need dependable and accurate protection relays for every type of start. For 3-phase motors from 1 to 630 A and over. Cable feed through relay. Precise ...
FANOX ELECTRONIC
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, ...
Trigger voltage: 24 V - 110 V
... system protection monitoring relay RE series; Frequency and voltage monitoring; Functional safety; Measuring voltage 3 x 400/230V AC; Supply voltage 24V DC, 110-240V AC; 3 CO contacts; Width 107 mm; Installation ...
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 ...
CIRCUTOR
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 ...
CIRCUTOR
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 ...
CIRCUTOR
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 ...
Tripping current: 30 mA
Trigger voltage: 400 V
... communication method:RS485 Protocol,Standard MODBUS protocol Internal ground impedance:1024k (ohm) Relay output form:Normally open + normally closed Relay output contact:3A, 250VAC/30VDC Response ...
Chongqing Blue Jay Technology Co. Ltd
Tripping current: 30 mA
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 ...
Chongqing Blue Jay Technology Co. Ltd
GYID series insulation monitor is used for real-time monitoring of the insulation resistance between the high voltage components (0~1000Vdc) and the chassis (earth) of the power battery pack (pure electric or hybrid) power supply system. ...
Chongqing Blue Jay Technology Co. Ltd
Tripping current: 0.05 A - 16 A
Trigger voltage: 48 V - 400 V
... 96x96mm Dossena presents the DER3B DUAL range, the new generation of type B differential toroid relays. DER3B DUAL is recommended for electrical protection in the tertiary sector, where devices ...
DOSSENA
Tripping current: 0.05 A - 16 A
Trigger voltage: 48 V - 400 V
... modules Dossena presents the DER3B DUAL range, the new generation of type B differential toroid relays. DER3B DUAL is recommended for electrical protection in the tertiary sector, where devices ...
DOSSENA
Tripping current: 0.03 A - 30 A
Trigger voltage: 48 V - 400 V
The residual current relays of the DER3 Dossena range can be used on LV networks in alternating current of the TT and TN type. They make it possible to achieve adequate selectivity and residual current protection ...
DOSSENA
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 ...
Contrel elettronica
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 ...
Contrel elettronica
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 ...
Contrel elettronica
Tripping current: 30 mA - 30,000 mA
... with our relays used together with RCR and ELR series self-toroid or external toroid (Toroidal Residual Current Transformers, Collector and Multiplexer Toroidal Current Transformers). Our Aktif RCR and ELR series residual ...
The compartments can be equipped with protection relay for maximum safety and control. The relays are supplied and programmed with the customer's specifications.
... permanent control of the connection circuit between the differential relay and the toroid. When any anomaly is detected in the connection between the toroid and the relay, the protection ...
Tripping current: 125 A - 1,000 A
Trigger voltage: 690 V - 960 V
Tested to IEC 61439 6 ampere ratings from 125 to 1000A UL94-V0 shroud covers in 3 sizes for added protection Easy to use Link disconnect Compatible with leading brands of MCCB
... application of digital techniques to protection relay technology. The requirement for highly reliable control relay elements does however remain and often constitutes a significant cost ...
Mors Smitt BV
... application of digital techniques to protection relay technology. The requirement for highly reliable control relay elements does however remain and often constitutes a significant cost ...
Mors Smitt BV
... range represents a new generation of high speed electro-mechanical tripping relays for power utility protection and control applications. Overview 12 Contact Tripping Relay Fast operation ...
Mors Smitt BV
The SM 500 model engineered by General Industrial Controls, is an under voltage and overvoltage protection relay that functions as a protection against phase loss and phase reversal. ...
The unit is manufactured by GIC, and is a thermistor relay that is resistant against phase sequence, loss, and asymmetry faults. The device is also resistant to overheating in applications with heavy-duty load, peak switching ...
SFE2/4 SERIES PHASE SEQUENCE RELAY - Compact Size - 1 Module ( 17,5mm) - Phase sequence / Rotation control - Universal three phase supply 3x200-450VAC - Din rail mounting - 1 Exchange contact Typical application ...
EL.CO.
CRE-5 SERIES CURRENT RELAY - Compact Size - 1 Module ( 17,5mm) - Usable for current sensing from current transformer - Supply isn't galvanically separated from measured current, it must be in the same phase - ...
EL.CO.
VEU230 / VEU400 SERIES UNDER VOLTAGE RELAY - Compact Size - 1 Module ( 17,5mm) - Monitor own supply and detects if one or more phases exceed the set under voltage trip levels - Measure phase to phase voltage - Adjustament ...
EL.CO.
... start-up and cause the system to trip. ENTES Phase Failure (Motor Protection) Relays offer the perfect solution to these defects. They are designed to impart 100% efficient protection ...
ENTES
... isolating transformers, motor (phase) protection relays, phase sequence relays, current monitoring relays, voltage monitoring relays, liquid level controller ...
ENTES
The FR-02 is a phase sequence relay with 1 C/O output contact. It is designed to monitor the L1, L2 and L3 phase sequence. Ideal applications include pumping systems, elevators, air compressors, etc.
ENTES
... of external meters). Available options include a block (generator + step-up transformer) protection option and a short-circuit and overcurrent protection option. DEIF's utility ...
DEIF
Trigger voltage: 80 V - 120 V
... voltage transfers are ideal generator protection, engine and transformer security against antagonistic framework voltage conditions. The adaptable units offer various movable parameters. The protective ...
DEIF
Trigger voltage: 80 V - 120 V
The Deiv RMV-122D is an under-voltage and overvoltage relay of (U) that can protect generators, motors and transformers from adverse system voltage conditions. In addition, this device is suitable for operations in marine ...
DEIF
Tripping current: 0.16 A - 480 A
Protects motors against overload and locked rotor, securing safe operation. Standard model complies with Japanese and many international standards.
MITSUBISHI ELECTRIC AUTOMATION
... 7SJ85 overcurrent protection has been designed specifically for protection of feeders and lines in medium-voltage and high-voltage systems. The SIPROTEC 7SJ86 overcurrent ...
Siemens Energy automation and smart grid
Entry-level, yet powerful protection for motors and other electrical assets, finding application in power control centres and switchgear, motor control centres, etc. Complete and reliable protection ...
MITSUBISHI Automation
... Scope • Busbar and ideal multipurpose backup protection relay • Product benefits • Preconfigured functions for busbar protection application • The relays are ...
ABB Oy Distribution Automation
Tripping current: 250 A
Motor protection is one of the central tasks of the electrical equipment of any machine. The electronically configurable ZEB electronic motor protection relays of the Eaton Moeller series ...
Your suggestions for improvement:
A protection relay shuts off a machine operating in a way that represents a potential risk to itself.
ApplicationsThese 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.
TechnologiesAs 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 chooseChoice of a protection relay depends on the monitored parameters: overcurrent, zero velocity, excessive speed, current consumption, leaks, etc.
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