Monitoring Relays

What are Monitoring Relays?
Monitoring relays are electrical devices that are used to monitor various parameters in a power system, such as voltage, current, temperature, and frequency, and trigger an alarm or action if the values go beyond a preset threshold. They are designed to detect abnormal operating conditions in a system and alert operators or take corrective action to prevent damage to equipment or injury to personnel.There are many types of monitoring relays, each designed to monitor a specific parameter. For example, a voltage monitoring relay is used to monitor the voltage levels in a circuit and trigger an alarm or action if the voltage levels go beyond a preset threshold. Similarly, a current monitoring relay is used to monitor the current levels in a circuit and trigger an alarm or action if the current levels go beyond a preset threshold.Monitoring relays are commonly used in industrial settings, such as manufacturing plants and data centres, where reliable power is critical. They can also be used in residential or commercial settings to monitor electrical systems and equipment.In addition to monitoring parameters, some monitoring relays also have built-in communication capabilities, allowing them to send alerts or data to a remote monitoring system or operator. This can help operators quickly identify issues and take corrective action, improving system reliability and reducing downtime.
Where are Monitoring Relays Used?
Monitoring relays are used in a wide range of applications where it is important to monitor and protect electrical systems and equipment. Motor Control: Monitoring relays are commonly used to protect motors from damage caused by overloads, phase loss, or phase imbalance. They can also monitor the temperature of the motor and trigger an alarm or action if it exceeds a preset threshold. Power Distribution: Monitoring relays are used in power distribution systems to monitor voltage and current levels and trigger alarms or actions if they go beyond a preset threshold. This can help prevent damage to equipment and ensure that power is distributed safely and efficiently. HVAC: Monitoring relays are used in heating, ventilation, and air conditioning (HVAC) systems to monitor temperature and humidity levels and trigger alarms or actions if they go beyond a preset threshold. This can help ensure that HVAC systems are operating efficiently and effectively. Lighting: Monitoring relays are used in lighting systems to monitor voltage and current levels and trigger alarms or actions if they go beyond a preset threshold. This can help prevent damage to lighting fixtures and ensure that lighting systems are operating safely and efficiently. Renewable Energy: Monitoring relays are used in renewable energy systems, such as solar and wind power, to monitor voltage, current, and frequency levels and trigger alarms or actions if they go beyond a preset threshold. This can help ensure that renewable energy systems are operating efficiently and effectively.

Compare Crouzet Current Monitoring Relay, SP-NO/NC, DIN Rail RS Stock No.: 261-959 Mfr. Part No.: 84871122 Datasheets: £108.70 Each	Crouzet	Current	-	SP-NO/NC	-	-	DIN Rail	2A	20A	Overcurrent, Undercurrent	-	500ms	-	-	-	-	MIC	-

Compare Crouzet Level Monitoring Relay, DPDT, 24 → 240V ac, DIN Rail RS Stock No.: 614-9347 Mfr. Part No.: 84870700 Datasheets: £83.44 Each	Crouzet	Level	-	DPDT	24 → 240V ac	-	DIN Rail	10mA	5A	-	-	0.1 → 5s	50 → 60Hz	-	-	-	HNM	-

Compare Crouzet Speed Monitoring Relay, SP-NO/NC, DIN Rail RS Stock No.: 261-993 Mfr. Part No.: 84874320 Datasheets: £151.08 Each	Crouzet	Speed	-	SP-NO/NC	-	-	DIN Rail	-	-	-	-	15ms	-	-	-	-	HSV	-

Compare Crouzet Phase, Voltage Monitoring Relay, 3 Phase, SPDT, 183 → 528V ac, DIN Rail RS Stock No.: 261-915 Mfr. Part No.: 84873022 Datasheets: £90.08 Each	Crouzet	Phase, Voltage	3	SPDT	183 → 528V ac	Overvoltage, Undervoltage	DIN Rail	-	-	-	Phase Asymmetry, Phase Failure, Phase Sequence	0.1 → 10s	-	-	-	-	MWG	-

Compare Crouzet Phase Monitoring Relay, 3 Phase, DPDT, DIN Rail RS Stock No.: 261-909 Mfr. Part No.: 84873021 Datasheets: £90.08 Each	Crouzet	Phase	3	DPDT	-	-	DIN Rail	-	-	-	Phase Failure, Phase Sequence	500ms	-	-	-	-	MWS2	-

Compare Crouzet Current Monitoring Relay, 3 Phase, DPDT, DIN Rail RS Stock No.: 614-9397 Mfr. Part No.: 84871130 Datasheets: £128.43 Each	Crouzet	Current	3	DPDT	-	-	DIN Rail	0.1A	10A	Overcurrent, Undercurrent	-	0.1 → 3s	-	-	-	-	HIH	-

Compare Crouzet Current Monitoring Relay, 1 Phase, SPDT, DIN Rail RS Stock No.: 463-3654 Mfr. Part No.: 84871034 Datasheets: £154.39 Each	Crouzet	Current	1	SPDT	-	-	DIN Rail	0.1A	10A	Overcurrent, Undercurrent	-	0.1 → 3s	-	-	-	-	EIH	-

Compare Crouzet Current Monitoring Relay, 1 Phase, SPDT, DIN Rail RS Stock No.: 463-3402 Mfr. Part No.: 84871030 Datasheets: £155.03 Each	Crouzet	Current	1	SPDT	-	-	DIN Rail	0.1A	10A	Overcurrent, Undercurrent	-	0.1 → 3s	-	-	-	-	EIH	-

Compare Crouzet Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 194 → 528 V, DIN Rail RS Stock No.: 262-003 Mfr. Part No.: 84873026 Datasheets: £171.60 Each	Crouzet	Phase, Voltage	3	DPDT	194 → 528 V	Overvoltage, Undervoltage	DIN Rail	-	-	-	Phase Asymmetry, Phase Failure, Phase Sequence	0.1 → 10s	-	-	-	-	HWUA	-

Compare Crouzet Level Monitoring Relay, SPDT, DIN Rail RS Stock No.: 837-7496 Mfr. Part No.: 84870200 Datasheets: £70.26 Each	Crouzet	Level	-	SPDT	-	-	DIN Rail	-	-	-	-	0.1 → 5s	-	-	-	-	ENR	-

Compare Crouzet Voltage Monitoring Relay, 1 Phase, SPDT, 20 → 80V ac/dc, DIN Rail RS Stock No.: 614-9454 Mfr. Part No.: 84872151 Datasheets: £114.18 Each	Crouzet	Voltage	1	SPDT	20 → 80V ac/dc	Overvoltage, Undervoltage	DIN Rail	-	-	-	-	0.1 → 10s	-	-	-	-	MUS/MUSF	-

Compare Crouzet Phase, Voltage Monitoring Relay, 3 Phase, SPDT, 183 → 528V ac, DIN Rail RS Stock No.: 837-7490 Mfr. Part No.: 84873029 Datasheets: £80.34 Each	Crouzet	Phase, Voltage	3	SPDT	183 → 528V ac	Overvoltage	DIN Rail	-	-	-	Phase Failure, Phase Sequence	≤650ms	-	-	-	-	MWS	-

Compare Crouzet Current Monitoring Relay, 3 Phase, DPDT, DIN Rail RS Stock No.: 614-9375 Mfr. Part No.: 84871120 Datasheets: £128.43 Each	Crouzet	Current	3	DPDT	-	-	DIN Rail	2mA	500mA	Overcurrent, Undercurrent	-	0.1 → 3s	-	-	-	-	HIL	-

Compare Crouzet Voltage Monitoring Relay, 1 Phase, SPDT, 65 → 260V ac/dc, DIN Rail RS Stock No.: 262-211 Mfr. Part No.: 84872152 Datasheets: £112.08 Each	Crouzet	Voltage	1	SPDT	65 → 260V ac/dc	Overvoltage, Undervoltage	DIN Rail	-	-	-	-	0.1 → 10s	-	-	-	-	MUSF	-

Compare Crouzet Voltage Monitoring Relay, 1 Phase, SPDT, 65 → 260V ac/dc, DIN Rail RS Stock No.: 614-9448 Mfr. Part No.: 84872142 Datasheets: £108.33 Each	Crouzet	Voltage	1	SPDT	65 → 260V ac/dc	Overvoltage, Undervoltage	DIN Rail	-	-	-	-	0.1 → 10s	-	-	-	-	MUS/MUSF	-

Compare Crouzet Voltage Monitoring Relay, DPDT, 15 → 600 V, DIN Rail RS Stock No.: 614-9410 Mfr. Part No.: 84872130 Datasheets: £125.27 Each	Crouzet	Voltage	-	DPDT	15 → 600 V	Overvoltage, Undervoltage	DIN Rail	-	-	-	-	0.1 → 3s	-	-	-	-	HUH	-

Compare Crouzet Phase, Voltage Monitoring Relay, 3 Phase, SPDT, 183 → 528V ac, DIN Rail RS Stock No.: 262-025 Mfr. Part No.: 84873025 Datasheets: £148.22 Each	Crouzet	Phase, Voltage	3	SPDT	183 → 528V ac	Overvoltage, Undervoltage	DIN Rail	-	-	-	Phase Failure, Phase Imbalance, Phase Sequence	0.1 → 10s	-	-	-	-	MWUA	-

Compare Crouzet Voltage Monitoring Relay, 3 Phase, DPDT, 194 → 528V ac, DIN Rail RS Stock No.: 262-198 Mfr. Part No.: 84873220 Datasheets: £142.64 Each	Crouzet	Voltage	3	DPDT	194 → 528V ac	Overvoltage, Undervoltage	DIN Rail	-	-	-	-	0.3 → 30s	-	-	-	-	H3US	-

Compare Crouzet Voltage Monitoring Relay, DPDT, 0.2 → 60 V, DIN Rail RS Stock No.: 614-9404 Mfr. Part No.: 84872120 Datasheets: £122.13 Each	Crouzet	Voltage	-	DPDT	0.2 → 60 V	Overvoltage, Undervoltage	DIN Rail	-	-	-	-	0.1 → 3s	-	-	-	-	HUL	-

Compare Crouzet Voltage Monitoring Relay, 1 Phase, SPDT, DIN Rail RS Stock No.: 463-3474 Mfr. Part No.: 84872030 Datasheets: £137.73 Each	Crouzet	Voltage	1	SPDT	-	-	DIN Rail	-	-	-	-	0.1 → 3s	-	-	-	-	EUH	-

Monitoring Relays

What are Monitoring Relays?

Where are Monitoring Relays Used?

Popular Searches