RS Components, Ltd. Datasheets for Protective Relays and Monitoring Relays

Protective relays and monitoring relays detect or monitor for abnormal power system conditions.
Protective Relays and Monitoring Relays: Learn more

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Product Name Notes
22.5mm wide . All devices can be digitally set and have an LCD display, a fault memory can be switched on. Simultaneous monitoring for overvoltage and undervoltage over the complete...
3 Phase Voltage Monitoring Relay with NO/NC Contact Configuration. Features & Benefits. Incorrect Phase Sequence. Phase loss. Phase undervoltage (0.6 x Un). Adjustable fault delay. LED indication. Write on ID...
3RN1 thermistor motor protection devices are thermal protection devices that are suitable, in combination with type A PTC resistors (cold conductors), for monitoring the temperature of electrical drives, transformer windings,...
3UG4 relays that monitor current, power factor and active current are ideal for monitoring the load of motors and functionality of electronic loads. These devices detect the effect of wear...
Adjustable delay from 0.02 to 1 second. LED status indication for ON & TRIP. Integral 35mm current transformer. Changeover relay contact. Remote facilities for Test, Reset and Meter Monitoring Application...
Adjustable set point and hysteresis. Inversion switch - Heating/Cooling control. Analogue output (0-10Vdc) relative to set point or measured temperature. LED indication of relay, probe and supply status. DIN rail...
Adjustment for upper and lower trip levels. Monitors own supply. User-selectable nominal voltage: 24/115/230 V ac. Time delay (from fault) with adjustable setting. Power On Delay (Td): 2 s. LED...
Application: 1-phase undercurrent monitoring in three-phase and alternating current networks. 4 measurement ranges from 0.1 → 15 A without an additional current transducer (programmable via rotary control). Fixed hysteresis. Adjustable...
Asymmetrical Recycling, Multi-voltage timer LART in a 17.5mm DIN rail housing. Recycling ON/OFF function. Separate adjustments for ON and OFF ranges. 7 selectable time ranges. Fine adjustment of selected time...
CM-IVN series coupling units serve to extend the measuring range of the insulation monitoring relay CM-IWN.x. All devices have two different terminal versions: Screw Connection Technology and Easy Connect Technology.
CM-IWS series relays serve to monitor insulation resistance and can be configured to the requirements of the applications. All devices have two different terminal versions: Screw Connection Technology and Easy...
Compact, low cost unit, with LED tripped indicator and 1 change over relay contact. Reset is automatic when sensor has cooled down. Control and signalling voltages should have the same...
Controls the operation of pairs of motors, compressors, generators etc. Can be used for simultaneous operation of two motors as well as cascade operation of a number of motors. Monitors...
Current isolator that can be mounted on DIN rail individuallyor with other units. The housing is 102.5mm high by 6.2mm wide. The performance specifications are similar to standard sized MCR...
Delay On Operate, Multi-voltage timer LEDO in a 17.5mm DIN rail housing. Supply initiated Delay On Operate timing function. 7 selectable time ranges. Fine adjustment of selected time range. Multi-voltage...
Depending on the configuration, the current monitoring relays CM-SRS.1 and CM-SRS.2 can be used for over- or undercurrent monitoring in single-phase AC and/or DC systems. The current to be monitored...
Depending on the configuration, the voltage monitoring relays CM-ESS.1 and CM-ESS.2 can be used for over- or undervoltage monitoring in single-phase AC and/or DC systems. The voltage to be monitored...
Detection of over voltage, under voltage and phase failure. Network error diagnosis through more LEDs. Response values for over and under voltage separately adjustable. Adjustment ranges 0.9 → 1.3 UN...
Detection of phase failure in three-phase systems. Single-phase connection also an option. Rest current principle. Adjustable phase sequence. LED display for each phase. 17.5 mm overall width Monitoring Application =...
Detects insulation faults in earthed networks such as RCCBs but without interruption. For monitoring and preventive maintenance of electrical systems. Detection ranges from 30 mA → 10 A with a...
Detects Over frequency. OFR relay energises if frequency rises above trip level – red LED off, contacts 11, 12 /21 & 22. Adjustable trip level: 40 → 60Hz. Adjustable hysteresis.
Detects phase loss. Detects incorrect phase sequence. Monitors own supply. LED indication for correct/incorrect phase sequence. DIN Rail housing. Installation/Data sheet supplied Monitoring Application = Phase Supply Voltage = 400...
Detects under and over-voltage condition. Adjustment for upper and lower trip levels. Monitors own supply. User selectable nominal voltage (380, 400 or 415V). Time delay (from fault) with adjustable setting:...
Detects under-voltage condition. Detects phase loss. Detects neutral loss (4-wire version). Adjustment for trip level and hysteresis. Monitors own supply. Time delay: 200ms (from fault). 1 x DPDT relay output...
DIN standard case, which may be front panel or chassis mounted (11-pin socket 403-869). Monitors the speed of machinery via the inputs from RS inductive proximity switches, open collector transistor...
Each current pulse operates the IK8702 remote switchs contacts that then remain in the adopted position until the next current pulse. Low space requirements. Reduced wiring requirements. Quiet switching. 10mA...
Easy operation without complex menu systems. Certification to DIN 3440 Monitoring Application = Temperature Supply Voltage = 24 - 240 V ac/dc Contact Configuration = SPST Time Delay = 0...
Extremely simple operation with no complex menu. High-end evaluation units with digital display suitable for wide temperature ranges & variety of sensor types. Settable hysteresis. Fast troubleshooting by detecting wire...
Extremely simple operation. Settable hysteresis. Fast troubleshooting by detecting wire breakage. Relay configuration: SPNC, SPNO Monitoring Application = Temperature Supply Voltage = 110/230 V ac Contact Configuration = SPDT Temperature...
Extremely simple operation. Settable hysteresis. Fast troubleshooting by detecting wire breakage. Relay configuration: SPNC, SPNO Monitoring Application = Temperature Supply Voltage = 24 - 240 V ac/dc Contact Configuration =...
For monitoring the power consumption of electrical loads. For monitoring AC and DC currents. Relay for overcurrent or undercurrent monitoring. Measurement frequency up to 5 kHz. LED indicates operational readiness...
In the event of an error, the relay for the acoustic signal and the relay for the visual signal are both activated. The user can acknowledge the alarm on the...
Interval (Single Shot), Multi-voltage timer LEIN in a 17.5mm DIN rail housing. Supply initiated Interval (Single Shot) timing function. 7 selectable time ranges. Fine adjustment of selected time range. Multi-voltage...
L Series relay range of Timers, Control and Three Phase relays incorporate the latest technology and offer a wide range of user adjustable features. 17.5mm DIN rail housing. Microprocessor based.
Mainly used for asynchronous motors (cage rotors) on a single-phase or 3-phase network with significantly changing loads. The internal electrical isolation of the supply and measuring circuits means it can...
MINI MCR series limit value switches, with adjustable hysteresis and delay time and spring-cage connection. Power supply possible via the foot element (T-connector). Status and error indication via two diagnostic...
Monitoring input: Pulse from NPN open collector proximity switch or volt-free contact Monitoring Application = Speed Supply Voltage = 110 V ac Contact Configuration = SPDT Time Delay = 0.5...
Monitoring input: Pulse from NPN open collector proximity switch or volt-free contact Monitoring Application = Speed Supply Voltage = 230 V ac Contact Configuration = SPDT Time Delay = 0.5...
Monitoring of 3 phase systems for undervoltage or phase failure and activation of security lighting in accordance with VDE 0108 (IEC 255, VDE 0435 Part 303). Single phase connection also...
Monitoring of insulation resistance of DC networks. For DC networks, large voltage range in network to be monitored 12 Vdc → 280 Vdc. Alarm value adjustable for earth fault R...
Monitoring of insulation resistance of unearthed AC and DC networks. For AC and DC network currents with 0 → 500 V and 10 → 1000 Hz. Also monitors non-powered networks.
Monitoring of three-phase systems for direction of rotation. No auxiliary voltage. LED display lights up when a clockwise rotation field is detected. 17.5 mm overall width. In accordance with IEC...
Monitors 1-phase & 3-phase supply voltages for phase failure On fault, relay de-energizes & yellow LED turns off. 5% fixed hysteresis. 0.5 sec fixed OFF delay Monitoring Application = Phase...
Monitors the speed of rotating machinery using any 3-wire NPN sensor or other volt-free contact and will switch the output at the pre-selected speed . Response time of <0.4 seconds...
Monitors three-phase systems for phase sequence. No response delay. 1 changeover. LED indicates the relay status. Continuous voltage range 208 → 440 V, 50 / 60 Hz Monitoring Application =...
Multi range. Adjustable hysteresis. Latching facility. Adjustable fault delay. Adjustable start -up delay. Switchable relay inversion. LED indication. Write on ID tab. Dimensions: H78 x W45 x D99mm Monitoring Application...
Multi range. Adjustable hysteresis. Latching facility. Adjustable fault delay. Switchable relay inversion. LED indication. Write on ID tab. Dimensions: H78 x W45 x D99mm Monitoring Application = Voltage Supply Voltage...
Multi-function unit with 2 changeover contacts. Detects Open or Short circuit sensor and has auto or manual reset options Monitoring Application = Temperature Supply Voltage = 24 - 240 V...
Multi-sensor evaluation relay, able to monitor up to 6 PTC sensors. Over-temperature of any one sensor will cause the output contact (1N/O + 1N/C) to operate Monitoring Application = Temperature...
Multifunction timer LMMT in a 17.5mm DIN rail housing. 7 selectable functions. 7 selectable time ranges. Fine adjustment of selected time range. LED warning indication if function is changed whilst...
Multifunctional device for monitoring three-phase networks for undervoltage / overvoltage. Phase sequence asymmetry, mains failure (in accordance with IEC 255, VDE 0435 part 303). Monitoring Application = Phase, Voltage Supply...
NIVEAU CONTROL RELAY - Control Relays - Monitoring Relays
On fault, relay de-energizes & yellow LED turns off. No delay Monitoring Application = Phase, Voltage Supply Voltage = 185 - 265 V ac, 320 - 460 V ac Contact...
On fault, relay de-energizes & yellow LED turns off. No delay Monitoring Application = Phase, Voltage Supply Voltage = 320 - 460 V ac Contact Configuration = SPST Voltage Sensitivity...
On fault, relay de-energizes & yellow LED turns off. No ON delay Monitoring Application = Phase Supply Voltage = 200 - 500 V ac Contact Configuration = DPDT Electrical Phase...
Protection and monitoring of motors with integrated PTC thermistor temperature sensors. 1 NO, 4 A (230 V, AC-12). Automatic reset Monitoring Application = Temperature Supply Voltage = 220 - 240...
Provides continuous monitoring of important network and system parameters. Operating states indicated using coloured LEDs. Errors can be sent to a controller via a floating contact or can shut down...
Real effective value measurement . Applicable for frequencies with 40-500Hz AC and DC . All devices can be digitally set and have an LCD display, a fault memory can be...
Senses pulses from a proximity detector mounted near a machine shaft rotating at up to 10000rpm. LED indication of relay status and supply. DIN standard case, which may be front...
Separate relay & LED operation for three phase monitoring V & thermistor monitoring T. The relay monitors the following:. Incorrect phase sequence/rotation. Threshold voltage 60% of 400Vac. Phase failure/loss. Phase...
Siemens 3UG range of level monitoring relays for conductive liquids with screw terminals. To be used with 2 or 3 pole sensors. Comprising of 1 yellow LED for indicating the...
Single phase over- and undercurrent monitoring in 3 phase and alternating current networks. 4 measurement ranges from 0.1 → 15 A without an extra current transducer (programmable via bridges). Adjustable...
Standard unit with 1N/O and 1N/C contact. Two LEDs are provided for TRIP and READY Monitoring Application = Temperature Supply Voltage = 24 - 240 V ac/dc Contact Configuration =...
Standstill recognition for 3-phase and single-phase asynchronous motors, e.g. for safety door lock releases on machine tools or for activating parking brakes. The BD5936.17 measures the induced voltage of the...
Suitable for use in any climate. Screw and snap-on mounting onto 35mm standard mounting rail. Identification number and letter for switching elements 31 E. Ambient temperature during operating phase -25...
Switch initiated Delay Off (Delay On Release), Multi-voltage timer LESW in a 17.5mm DIN rail housing. Switch initiated Delay Off timing function. 7 selectable time ranges. Fine adjustment of selected...
Switching position display. Open connection terminals. Touch protection to DIN 0106 Part 100 Supply Voltage = 230 V ac Contact Configuration = DPDT
TELE ENYA series AC and DC voltage monitoring relay. Multifunction monitoring in a slim easy to use package. The ENYA series have a self-extinguishing plastic body with an IP rating...
TELE ENYA series AC current monitoring for single phase mains. Featuring overcurrent and undercurrent monitoring and a single change over contact. The ENYA series have a self-extinguishing plastic body with...
TELE ENYA series level control monitoring relay for conductive liquids. Featuring pump up and pump down monitoring and a single change over contact. The ENYA series have a self-extinguishing plastic...
TELE GAMMA series AC and DC voltage monitoring relay. Multifunction monitoring in a slim easy to use package. The GAMMA series have a self-extinguishing plastic body with an IP rating...
TELE GAMMA series AC/DC current monitoring for single phase. Featuring overcurrent and undercurrent monitoring and two change over contacts. The GAMMA series have a self-extinguishing plastic body with an IP...
TELE GAMMA series level control monitoring relay for conductive liquids. Featuring pump up and pump down monitoring and a single change over contact. The GAMMA series have a self-extinguishing plastic...
TELE GAMMA series single and three phase power factor monitoring relay. Multifunction monitoring in a slim easy to use package. The GAMMA series have a self-extinguishing plastic body with an...
TELE GAMMA series temperature monitoring relay of the motor winding with fault latch for temperature sensors. Featuring short circuit monitoring of the thermistor line and integfrated test or reset key...
TELE KAPPA series AC and DC voltage monitoring relay. Multifunction monitoring in a slim easy to use package. The KAPPA series have a self-extinguishing plastic body with an IP rating...
TELE KAPPA series AC current monitoring for single phase mains. Featuring overcurrent and undercurrent monitoring and a single change over contact. The KAPPA series have a self-extinguishing plastic body with...
TELE VEO series AC and DC voltage monitoring relay. Multifunction monitoring in a slim easy to use package. The VEO series have a self-extinguishing plastic body with an IP rating...
TELE VEO series AC current monitoring for single phase mains. Featuring overcurrent and undercurrent monitoring and a single change over contact. The VEO series have a self-extinguishing plastic body with...
TELE VEO series temperature monitoring relay of the motor winding with fault latch for temperature sensors. Featuring short circuit monitoring of the thermistor line and integfrated test or reset key...
The 3RN10-22 is able to monitor two sensors for ALARM and TRIP conditions. Alarm operates 1N/O contacts with additional changeover contact for TRIP condition Monitoring Application = Temperature Supply Voltage...
The ABB CM-WDS relay is from the CM cycle monitor range. This cycle monitoring relay features a watchdog function, operates with a rated control supply voltage of 24 V DC,...
The AI897 insulation monitor displays the insulation resistance of unearthed 3 phase and alternating current systems to earth. The device works according to the quiescent current principle, that is, the...
The AI898 insulation monitor displays the insulation resistance of unearthed direct current networks to earth. It does not detect symmetrical earth faults. In practice, these faults are generally insignificant. The...
The BA9041 can recognise the phase sequence L1 - L2 - L3 of a three-phase network and therefore avoid an incorrect rotational direction. The BA9041 phase sequence relay monitors the...
The BA9053 / 410 current relay is a static measurement relay with isolated measurement and auxiliary circuits. It is suitable for monitoring direct and alternating currents (compensated to effective value).
The CM range of thermistor motor protection relays are used to control motors equipped with PTC temperature sensors. The PTC temperature sensors are incorporated in the motor windings to measure...
The CM-MPN.x2 are multifunctional monitoring relays for three-phase mains. They monitor the phase,parameters phase sequence, phase failure, over and undervoltage and phase unbalance.The threshold,values for over- and undervoltage and phase...
The CM-MPSx3 are multifunctional monitoring relays for three-phase mains. They monitor the phase parameters phase sequence, phase failure, over- and undervoltage and phase unbalance. CM-MPS.23 also monitors the neutral for...
The CM-PAS.x1 are monitoring relays for three-phase mains. They monitor the phase parameters phase sequence, phase failure and phase unbalance. The threshold value for phase unbalance is adjustable Monitoring of...
The CM-PSS.x1 are monitoring relays for three-phase mains. They monitor the phase parameters phase sequence, phase failure, over- and undervoltage. The threshold values for over- and undervoltage are fixed. Monitoring...
The CM-PVS.x1 are monitoring relays for three-phase mains. They monitor the phase parameters phase sequence, phase failure, over- and undervoltage. The threshold values for over- and undervoltage are adjustable. Monitoring...
The current window monitoring relays CM-SFS.2 can be used for the simultaneous monitoring of over- and under-currents in single-phase AC and/or DC systems. The two c/o contacts can be configured...
The IK 9094.11 AC/DC24V 0 to 150°C is a Temperature Monitoring Relay with detection sensor of in-circuit broken wire. It features LED indicator for operation and state of output relay.Perfect...
The IK8839 is a single phase relay for monitoring the operating current of electrical consumers and works on the quiescent current principle. Its i-k current path is galvanically separated from...
The IL9075/001 monitors all three fuses in the three-phase network to produce, for example, an automatic shutoff and switch lock of a three-phase motor if one or more of the...
The IL9079 is an undervoltage relay for detecting short interruptions. Enclosure version for the IL 9079 has a depth of 59 mm. Terminals are at the bottom for installation systems...
The load monitor is suitable for monitoring electrical industrial drive systems with variable motor loads. Monitoring Application = Phase Supply Voltage = 400 V ac Contact Configuration = DPDT Electrical...
The Mini Analog Pro signal conditioners from Phoenix Contact are the first 6mm range with plug-in connection technology. Using the latest switching technology, applications are made quicker and easier with...
The MK 9056N monitors compliance with the phase sequence L1-L2-L3 in three-phase current networks. Detects phase sequence errors. Output contact 2 changeovers. Overall width: 22.5 mm Monitoring Application = Phase...
The MK9052 motor protection relay is used to prevent thermal overloads in motors (for example as caused by high switching frequencies, heavy start-up loads, single phase operation, interrupted cooling, high...
The relay monitors: Presence of supply. Correct rotation. Correct phase angle. Dimensions: H78 x W45 x D99mm Monitoring Application = Phase Supply Voltage = 400 V ac Contact Configuration =...
The SIRIUS 3TX7 narrow design interface relays are coupling elements used to connect control signals to and from a PLC. Coupling device (interface) as a connector module. Control and peripheral...
The unit is for use with equipment that has in-built thermistors to DIN 44081 and will monitor up to 6 thermistors in a chain. When the resistance of the thermistors...
The voltage window monitoring relay CM-EFS.2 can be used for the simultaneous monitoring of over- (>U) and undervoltages (Monitoring Application = Voltage Supply Voltage = 24 - 240 V ac/dc...
Thermistor motor protector, 110Vac - Control Relays - Monitoring Relays
Thermistor motor protector, 230/110Vac - Control Relays - Monitoring Relays
Thermistor motor protector, 24-240V - Control Relays - Monitoring Relays
This Broyce Control 45UFR electrical relay unit is designed to monitor the frequency of its own supply. The 45UFR is used for monitoring under frequency conditions, whereby the relay de-energises...
This range of multifunctional monitoring relays allows to monitor electrical as well as physical system parameters. EMD Monitoring Relays can measure: Currents. Voltages, 1- and 3-phase. Phase sequences. Real powers.
Timing step relay, step relay, light constantly ON, staircase relay. Incandescent lamp load and halogen lamp load 2000W, Fluorescent lamp load 1000W. LED indication of power and operation status. Switch...
Use: overcurrent monitoring in DC and AC current networks. Four measurement ranges that can be set via a rotary switch. Adjustable response value, fixed hysteresis. Adjustable switching delay. Rest current...
Voltage isolator that can be mounted on DIN rail individually or with other systems. The housings are 102.5mm high by 6.2mm. The performance specifications are similar to standard sized MCR...
Voltage monitoring for 3 phase systems. 3 phase mains, 50 → 400 Hz. Arithmetic average measurement. Adjustable response and fall-back values. For mains with or without a neutral conductor. Closed...

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