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
| Product Name | Notes |
|---|---|
| 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... | |
| 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... | |
| 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),... | |
| 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,... | |
| 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 â†' 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... | |
| 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... | |
| 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... | |
| Contacteur Jour/Nuit 230V 2F - Control Relays - Monitoring Relays | |
| 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... | |
| 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... | |
| 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... | |
| 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 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... | |
| 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. | |
| 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... | |
| 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... | |
| 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... | |
| 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:... | |
| 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... | |
| 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... | |
| 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. | |
| 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 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 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... | |
| 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... | |
| 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... | |
| 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:... | |
| NIVEAU CONTROL RELAY - Control Relays - Monitoring Relays | |
| 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. | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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 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 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,... | |
| 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... | |
| 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,-... | |
| 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 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... | |
| 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... | |
| 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 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... | |
| 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 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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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