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 928 products

Filter

Sort

Filter

Sort

€ 30.21

€ 30.21 Each (ex VAT)

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

€ 27.75

€ 27.75 Each (ex VAT)

Add to basket
RS Pro
-
Liquid Level
-
-
-
Single
-
-
-
-
150 → 260V ac
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS Stock No.: 132-173Brand: RS PRO

€ 23.38

€ 23.38 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.: 122-216Brand: RS PRO

€ 18.80

€ 18.80 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

€ 18.68

€ 18.68 Each (ex VAT)

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

€ 28.66

€ 28.66 Each (ex VAT)

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

€ 25.22

€ 25.22 Each (ex VAT)

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

€ 80.89

€ 80.89 Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
-
1
-
-
-
SPDT
12 → 24V dc
-
Undervoltage
-
DIN Rail
-
-
-
-
-
-
0 → 30s
-
-
-
L
-
89mm
-20°C
24V dc
-
-
12V dc
-
+60°C
-
-
66.5mm
+60°C
17.5mm
Screw
1
17.5 x 66.5 x 89mm
-
-
-

€ 88.25

€ 88.25 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
-
-
-
-
-
+60°C
-
-
66.5mm
+60°C
17.5mm
Screw
1
17.5 x 66.5 x 89mm
-
-
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

€ 145.73

€ 145.73 Each (ex VAT)

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

€ 84.29

€ 84.29 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
-20°C
280V
-
-
-
-
+60°C
-
-
66.5mm
+60°C
17.5mm
Screw
1
17.5 x 66.5 x 89mm
-
-
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
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 223-7789Brand: RS PRO

€ 167.02

€ 167.02 Each (ex VAT)

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

€ 178.82

€ 178.82 Each (ex VAT)

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

€ 148.31

€ 148.31 Each (ex VAT)

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

€ 155.36

€ 155.36 Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
-
1
-
-
-
SPDT
Maximum of 500 V
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
0.1 → 30s
48 → 63Hz
-
-
L
-
89mm
-20°C
500V
-
-
-
-
+60°C
-
-
66.5mm
+60°C
17.5mm
Screw
1
17.5 x 66.5 x 89mm
-
-
-
RS PRO Current Monitoring Relay With SPDT Contacts
RS Stock No.: 102-6134Brand: RS PRO

€ 155.36

€ 155.36 Each (ex VAT)

Add to basket
RS Pro
-
Current
-
-
-
1
-
-
-
SPDT
-
-
-
-
DIN Rail
-
1A
-
10A
Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
-
-
L
-
89mm
-20°C
-
-
-
-
-
+60°C
-
-
66.5mm
+60°C
17.5mm
Screw
1
66.5 x 17.5 x 89mm
1 → 10A
-
Green LED Indication for Supply Status

€ 114.05

€ 114.05 Each (ex VAT)

Add to basket
RS Pro
-
Phase, Voltage
-
-
-
3
-
-
-
SPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
89mm
-20°C
-
-
-
-
-
+60°C
-
-
66.5mm
+60°C
17.5mm
Screw
1
17.5 x 66.5 x 89mm
-
-
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

€ 150.87

€ 150.87 Each (ex VAT)

Add to basket
RS Pro
-
Phase, Voltage
-
-
-
3
-
-
-
DPDT
243 → 540 V
-
Undervoltage
-
DIN Rail, Surface Mount
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
-
-
-
-
-
66.5mm
-20°C
540V
-
-
243 V
-
+60°C
-
-
89mm
-20 → +60°C
17.5mm
Screw
-
89 x 17.5 x 66.5mm
-
-
Microprocessor Based, Detects Incorrect Phase Sequence, Phase Loss And Neutral Loss, Adjustment For Under Voltage Trip Level, Adjustment For Time Delay
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 225-7387Brand: RS PRO

€ 152.04

€ 152.04 Each (ex VAT)

Add to basket
RS Pro
-
Phase, Voltage
-
-
-
3
-
-
-
DPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
17.5mm
Screw
-
-
-
-
-

€ 87.89

€ 87.89 Each (ex VAT)

Add to basket
RS Pro
-
Voltage
-
-
-
1
-
-
-
SPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
0.2 → 10s
48 → 63Hz
-
-
L
-
89mm
-20°C
-
48Hz
-
-
-
+60°C
63Hz
-
66.5mm
+60°C
17.5mm
Screw
1
17.5 x 66.5 x 89mm
-
-
2 LEDs for the Indication of Operational States, Adjustment for Time Delay, Adjustment for Undervoltage Trip Level, Microprocessor Based Relay, Monitors Own Supply & Detects if The Supply Exceeds The Set Under or Over Voltage Trip Levels, True RMS Monitoring

...