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 pre...

Showing 1-20 of 1304 products

Filter

Sort

Filter

Sort

448.40 MOP

448.42 MOP Each (ex VAT)

Add to basket
RS Pro
-
Current
-
-
Three
-
1NO/1NC
-
-
-
-
DIN Rail Mount
-
-
40A
100A
-
-
-
0.1 → 20s
-
-
-
-
-
75mm
-
-
-
-20°C
CE
Error Delay Time Adjustable
84.5mm
-
-20 to 55°C
55°C
-
-
44 x 84.5 x 75mm
44mm
-
-
40 → 100A

408.90 MOP

408.93 MOP Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
Single
-
1NO
-
120 → 300V ac
-
Overvoltage
DIN Rail Mount
-
-
-
-
-
-
-
0.1 → 600s
-
-
-
-
-
90.3mm
-
300V
120V
-20°C
CE
Built-In Current Transformer, Built-In Contactor
67.5mm
-
-20 to 55°C
55°C
-
-
52.9 x 67.5 x 90.3mm
52.9mm
-
-
-

325.30 MOP

325.30 MOP Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
Three
-
1NO/1NC
-
230 → 460V ac
-
Overvoltage
DIN Rail or Panel
-
-
-
-
-
-
Phase Loss
0.1 → 10s
-
-
-
-
-
75mm
-
460V
230V
-20°C
CE
Phase Sequence Control, With PTC, Non-Neutral
84.5mm
-
-20 to 55°C
55°C
-
-
44 x 84.5 x 75mm
44mm
-
-
-

227.20 MOP

227.19 MOP Each (ex VAT)

Add to basket
RS Pro
-
Current
-
-
Single
-
-
-
150 → 260V ac
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

208.60 MOP

208.62 MOP Each (ex VAT)

Add to basket
RS Pro
-
Liquid Level
-
-
Single
-
-
-
150 → 260V ac
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

102.90 MOP

102.94 MOP Each (ex VAT)

Add to basket
RS Pro
-
Phase
-
-
Three
-
-
-
150 → 260V ac
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS Stock No.: 122-216Brand: RS PRO

141.30 MOP

141.34 MOP Each (ex VAT)

Add to basket
RS Pro
-
Phase
-
-
Three
-
-
-
380V ac
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS Stock No.: 132-172Brand: RS PRO

140.30 MOP

140.31 MOP Each (ex VAT)

Add to basket
RS Pro
-
Phase
-
-
Three
-
-
-
380V ac
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS Stock No.: 132-173Brand: RS PRO

175.70 MOP

175.73 MOP Each (ex VAT)

Add to basket
RS Pro
-
Phase
-
-
Three
-
-
-
380V ac
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

161.30 MOP

161.28 MOP Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
Single
-
-
-
220V ac
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

215.50 MOP

215.51 MOP Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
Single
-
-
-
220V ac
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

189.50 MOP

189.49 MOP Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
Three
-
-
-
380V ac
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

663.00 MOP

663.02 MOP Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
1
-
SPDT
-
12 → 24V dc
-
Undervoltage
DIN Rail
-
-
-
-
-
-
-
0 → 30s
-
-
-
L
-
89mm
-
24V dc
12V dc
-20°C
-
-
17.5mm
-
+60°C
+60°C
Screw
1
17.5 x 66.5 x 89mm
66.5mm
-
-
-
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 102-6136Brand: RS PRO

343.90 MOP

343.88 MOP Each (ex VAT)

Add to basket
RS Pro
-
Phase, Voltage
-
-
3
-
SPDT
-
-
-
Undervoltage
DIN Rail
-
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
89mm
-
-
-
-20°C
-
2 LEDs for the Indication of Operational States, Adjustment for Time Delay, Adjustment for Undervoltage Trip Level, Detects Incorrect Phase Sequence & Phase Loss, Measures Phase to Phase Voltages, Microprocessor Based Relay, Monitors Own Supply & Detects an Undervoltage Condition on One or more Phases, True RMS Monitoring
17.5mm
-
+60°C
+60°C
Screw
1
17.5 x 66.5 x 89mm
66.5mm
-
-
-

708.40 MOP

708.37 MOP Each (ex VAT)

Add to basket
RS Pro
-
Phase
-
-
3
-
SPDT
-
Phase Loss, Voltage Assemmetry
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-20°C
-
-
90mm
-
-20 → +60°C
+60°C
Screw
-
17.5 x 90 x 66.5mm
66.5mm
-
-
-

483.90 MOP

483.92 MOP Each (ex VAT)

Add to basket
RS Pro
-
Phase, Voltage
-
-
3
-
SPDT
-
Maximum of 280 V
-
Undervoltage
DIN Rail
-
-
-
-
-
-
Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
-
89mm
-
280V
-
-20°C
-
2 LEDs for the Indication of Operational States, Detects Incorrect Phase Sequence & Phase Loss, Fixed Time Delay, Fixed Undervoltage Trip Level, Measures Phase to Phase Voltages, Microprocessor Based Relay, Monitors Own Supply & Detects an Undervoltage Condition on One or more Phases, True RMS Monitoring
17.5mm
-
+60°C
+60°C
Screw
1
17.5 x 66.5 x 89mm
66.5mm
-
-
-
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 223-7789Brand: RS PRO

541.20 MOP

541.22 MOP Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
3
-
DPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
-
-
-
-
-10°C
-
-
36mm
-
-10 → +60°C
+60°C
Screw
-
36 x 90 x 67mm
66.21mm
-
-
-
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 223-7790Brand: RS PRO

1,287.40 MOP

1,287.42 MOP Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
3
-
DPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
90mm
-
-
-
-10°C
-
-
36mm
-
-10 → +60°C
+60°C
Screw
-
36 x 90 x 67mm
66.21mm
-
-
-
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 223-7788Brand: RS PRO

595.30 MOP

595.32 MOP Each (ex VAT)

Add to basket
RS Pro
-
Phase, Voltage
-
-
3
-
SPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
-
-
-
-
-
-
65Hz
-
-
-10°C
-
-
36mm
45Hz
-10 → +60°C
+60°C
Screw
-
36 x 90 x 67mm
66.21mm
-
-
-
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 223-7791Brand: RS PRO

781.60 MOP

781.63 MOP Each (ex VAT)

Add to basket
RS Pro
-
Phase
-
-
3
-
SPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-20°C
-
-
90mm
-
-20 → +60°C
+60°C
Screw
-
17.5 x 90 x 66.5mm
66.5mm
-
-
-

...