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
261909 3 phase network control relay protects motors and equipment from expensive damage due to voltage faults on 3 phase systems. It monitors the sequence of phases L1, L2, L3 and...
261892
261915
262025
262047
3 phase network control relays monitor: the correct sequence of phases L1, L2, L3, the total phase failure - Undervoltage and overvoltage from 2% to 20% of Under Voltage Relay...
262126
262198
262205
3 phase voltage controllers which monitor:- Undervoltage, adjustable from -2% to -20% of Under voltage,- Overvoltage, adjustable from 2% to 20% of Under Voltage,- Presence of the neutral (H3USN only),...
2989365
3216804
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...
3927245
3927267
3927289
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,...
2962360 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...
3979139 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...
3611619 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...
3586901 Application: 1-phase undercurrent monitoring in three-phase and alternating current networks. 4 measurement ranges from 0.1 â†' 15 A without an additional current transducer (programmable via rotary control). Fixed hysteresis. Adjustable...
1026127 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...
3216551 Automatic control and regulation of fluid levels. Choice of functions, filling or draining, high or low alarm or storage of fault in the event of an alarm. Sensitivity adjustable from...
1356179
1356181
1356182
1356184
1356186
1356187
Broyce Controls L-Series signal conditioners use a QR barcode marking method allowing direct access to all technical data sheets, ensuring correct information is always at your finger tips! Compact 17.5...
131791 Contacteur Jour/Nuit 230V 2F - Control Relays - Monitoring Relays
2989393 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...
1026124
1026125
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...
2913144 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 â†' 1.3 UN...
3586917
3587049
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 =...
3611704 Detects incorrect phase sequence/failure. Monitors own supply. Adjustable for nominal voltage setting. Threshold voltage 70% of phase voltage setting. Time delay: <30ms (on delay: ≤500ms). 1 x SPDT relay output...
3611631 Detects Over frequency. OFR relay energises if frequency rises above trip level â€" red LED off, contacts 11, 12 /21 & 22. Adjustable trip level: 40 â†' 60Hz. Adjustable hysteresis.
3979145 Detects over-current condition. Adjustment for trip level. Monitors current in 3-phase supply. Time delay (from fault) with adjustable setting: 0.2 to 10s. 1 x DPDT relay output 8A. LED indication...
3611681 Detects under and over-voltage condition. Adjustment for upper and lower trip levels. Monitors own supply. Time delay (from fault) with adjustable setting. Power On Delay (Td): 2s. 1 x SPDT...
3611710 Detects under and over-voltage condition. Adjustment for upper and lower trip levels. Monitors own supply. Time delay (from fault) with adjustable setting. Power On Delay (Td): 5s. 1 x SPDT...
3611675 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:...
348150 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...
262053 HUL and HUH control relays are designed to control AC or DC voltages. They automatically recognise the shape of the DC or AC signal (50 Hz or 60 Hz). Control...
3587623 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...
1026129 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...
1026130
1026131
1026133
1026134
1026135
1026136
1026137
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.
3216848 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...
2989416 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...
2408951 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...
3277679
3586951
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...
3763710
3763726
3763732
3763748
3763754
3763760
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...
2991914
3216769
3216775
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...
2989400
3216781
3216797
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...
1026122
1026123
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...
2408967 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...
262069
262097
262132
262211
MUS and MUSF voltage control relays monitor single phase DC network voltages. These products monitor their own supply voltage. MUS relays allow the operator to choose between two operating modes:...
3277641
3277663
NIVEAU CONTROL RELAY - Control Relays - Monitoring Relays
1113087
1113088
1113089
1113090
1113091
1113092
1113093
1113094
1113095
1113096
1113097
1113098
1113099
1113100
1113101
1113102
1113103
1113104
1113105
1113106
Omron K8DT-AS/AW single phase current relays detect errors in motors and other equipment through current changes. Monitor AC or DC currents with one Relay. Use with commercially available current transformers.
1113123
1113124
1113125
1113126
Omron K8DT-LS conductive level controllers are Ideal for water level control. Offering sensitivity adjustment and an ON-delay timer that is ideal as a countermeasure for waves on liquid surfaces. Sensitivity...
1113135
1113136
Omron K8DT-PH three phase sequence and phase loss monitor protects motors and other equipment from unstable voltages, detecting phase sequence and phase loss for three-phase power supplies. Phase loss detection...
1113137
1113138
Omron K8DT-PM three phase sequence and phase loss monitor protects motors and other equipment from unstable voltages, detecting phase sequence and phase loss for three-phase power supplies. Phase loss detection...
1113139
1113140
Omron K8DT-PZ three phase sequence and phase loss monitor protects motors and other equipment from unstable voltages in the power supply system. Detect overvoltages, undervoltages, voltage asymmetry, phase sequence, and...
1113127
1113128
1113129
1113130
1113131
1113132
1113133
1113134
Omron K8DT-TH temperature monitoring relay, ideal to prevent heater overheating. Featuring a self-latching output to contribute to safe equipment operation. Set the temperature with simple rotary switches. Connect a thermocouple...
1113107
1113108
1113109
1113110
1113111
1113112
1113113
1113114
Omron K8DT-VS single phase voltage monitor relay detects abnormal voltages applies to equipment to protect against equipment failure. Can be used in either overvoltage or undervoltage mode. Monitor AC or...
1113115
1113116
1113117
1113118
1113119
1113120
1113121
1113122
Omron K8DT-VW single phase voltage monitor relay detects abnormal voltages applies to equipment to protect against equipment failure. Can be used in either overvoltage or undervoltage mode simultaneously. Monitor AC...
1026138
1026139
1026140
1026147
1026149
Professional range of Eaton current monitoring relays from the EMR4 series. The main function of the relays is the monitoring of single phase AC and DC networks. The relays are...
1026141
1026142
1026143
1026144
1026145
1026146
Professional range of Eaton current monitoring relays from the EMR5 series. The main function of the relays is the monitoring of single phase AC and DC networks. The relays are...
262019
262031
Relays HWTM and HWTM2 check the availability of the 3 phase network and the temperature of the motors using integrated PTC probes. The phase and temperature control functions are independent...
146092 Schneider Electric RM17 JC current control relay for controlling alternating currents in the event of overcurrent. Built-in current transformer with a wide measurement range. Monitors heating and lighting circuits and...
146159
146165
146171
146519
146531
Schneider Electric RM17 U single-phase and direct current voltage control relays that monitor over-voltage and under-voltage, with or without memory, or that operate in window mode. The overvoltage and undervoltage...
146452
146468
146474
Schneider Electric RM17/35 UB measurement and control relays for 3 phase supplies, monitor correct sequences of phases L1, L2 and L3. It also monitors total loss of one or more...
146238
146250
Schneider Electric RM17TG series measurement and control relays for 3 phase supplies. Monitoring the correct sequencing of phases L1, L2, and L3 and the total loss of one or more...
146496
146591
146597
146608
Schneider Electric RM17Tx00 Series multi-function 3 phase supply control relays. Monitoring the correct sequencing of phases L1, L2, and L3 and the total loss of one or more of each...
146086 Schneider Electric RM35 BA10 measurement and control relay monitors single phase and 3 phase pumps. It controls the sequence of phases L1, L2 and L3, the loss of one or...
146193 Schneider Electric RM35 HZ frequency control relays monitor the frequency variation of 50 or 60 Hz alternating signals. Detection of under and over-frequency with two independent relay outputs. Selectable memory...
1240191
1240192
145976
146200
Schneider Electric RM35 JA current control relay for controlling alternating and direct currents in the event of under or overcurrent. Automatic alternating or direct current recognition and a wide measurement...
146070 Schneider Electric RM35 S speed control relay to control conveyor belt, packaging and handling systems in the event of underspeed or overspeed. Operates with different types of sensor, 3-wire proximity...
146480 Schneider Electric RM35 TF measurement and control relays for 3 phase supplies, monitor correct sequences of phases L1, L2 and L3. It also monitors total loss of one or more...
146446 Schneider Electric RM35 TM relays for measurement and control of motor temperature. The relays monitor sequence of phases L1, L2 and L3, phase loss and motor temperature over the 3...
146109
146143
146187
Schneider Electric RM35 UA multifunction current control relays monitor both AC and DC currents. Featuring automatic current recognition for overcurrent and undercurrent moniotoring. Checks its own power supply. Clear hinged...
1240179 Schneider Electric Zelio RM22JA series current control relays for AC and DC current monitoring. Monitor both AC and DC currents. Automatic AC or DC recognition. Measurement ranges from 4 mA...
1240180
1240181
1240182
1240183
Schneider Electric Zelio RM22L series liquid level control relays for one or two liquid levels, with a fill or empty function. Control the actuation of pumps or valves to regulate...
1240184
1240185
Schneider Electric Zelio RM22T series multifunction three phase voltage control relays. The RM22T series monitor phase sequence and phase loss. Sealable front cover to help protect settings. Diagnostic button for...
1240186
1240187
1240188
1240189
1240190
Schneider Electric Zelio RM22UA series single phase or DC voltage control relays. Automatic AC or DC recognition. Selection between overvoltage and undervoltage. Monitoring of their own supply voltage measured as...
1240193 Schneider Electric Zelio RM35L series liquid level control relays for one or two liquid levels, with a fill or empty function. Control the actuation of pumps or valves to regulate...
347696 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...
2989371
3216810
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...
3586973 Single phase over- and undercurrent monitoring in 3 phase and alternating current networks. 4 measurement ranges from 0.1 â†' 15 A without an extra current transducer (programmable via bridges). Adjustable...
2408844 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...
1026128 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...
2395265
2395271
Switching position display. Open connection terminals. Touch protection to DIN 0106 Part 100 Supply Voltage = 230 V ac Contact Configuration = DPDT
1239713
1239714
1239716
1239717
1239718
1239719
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...
1239715 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...
1239720 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...
1239742
1239747
1239750
1239751
1239752
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...
1239748
1239749
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...
1239745
1239746
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...
1239767 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...
1239743
1239744
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...
1239729
1239730
1239732
1239733
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...
1239731 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...
1239722
1239724
1239725
1239726
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...
1239723
1239727
1239728
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...
1239721 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...
2409033 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...
2409049 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...
2408923 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...
2409320 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).
261971 The HHZ control relay controls frequency variations on 50 Hz or 60 Hz networks. This HSV frequency monitoring relay from Crouzet has been designed to control its own supply voltage,...
261993 The HSV relay controls the speed (or, more strictly speaking, the operating rate, or frequency) of a process (moving walkway, conveyor) using discrete sensors. It can be used to monitor...
262003 The HWUA 3 phase network control relay monitors:- The correct sequence of phases L1, L2, L3,- Total phase failure,- Undervoltage and overvoltage from 2% to 20% of Under Voltage Relay,-...
2408866 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...
2409027 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...
2913150 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...
146020 The level control relays RM35 LM33MW and RM35 LV14MW control one or two levels, filling or draining function:. RM35 LM33MW: control by resistive level sensor. RM35 LV14MW: control by On/Off...
261959 The MIC control relay is designed to control overcurrents (or undercurrents). This MIC current monitoring relay from Crouzet has a host of excellent features, including a built-in current transformer, LED...
2408973
2408995
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...
2991908 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 =...
2989387
3216826
3216832
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...
3611625 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...
144462 This relay acts as a safety device in gas-heated residential housing, by controlling the boiler and the stale air extraction system. Red indicator light on front panel indicates an air...
2773520 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...
3587639 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...
3962743
3962759
Used in combination with PTC thermistor sensors for thermal protection of machines. As soon as the nominal trip temperature (TNF) of the sensor is exceeded, the relay detects this variation...
2989422 Used to control the operation of small motors, compressors, generator and pumps for balanced operation. Operates on the alternation of the start up each time a switch is closed. The...
2408939
2408945
Voltage monitoring for 3 phase systems. 3 phase mains, 50 â†' 400 Hz. Arithmetic average measurement. Adjustable response and fall-back values. For mains with or without a neutral conductor. Closed...

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