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 1271 products
RS Stock No.: 558-898Brand: RS PRO
€ 52.03
€ 52.03 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
1
-
-
CO
150 → 300V ac
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-
-
-
-
-
RS Stock No.: 558-901Brand: RS PRO
€ 51.67
€ 51.67 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
1
-
-
CO
150 → 300V ac
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-
-
-
-
-
RS Stock No.: 558-897Brand: RS PRO
€ 37.63
€ 37.63 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
3
-
-
CO
-
-
-
Voltage Asymmetry
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-
-
-
-
-
RS Stock No.: 558-892Brand: RS PRO
€ 44.29
€ 44.29 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
3
-
-
CO
-
-
-
Voltage Asymmetry
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-
-
-
-
-
RS Stock No.: 102-6130Brand: RS PRO
€ 78.04
€ 78.04 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
1
-
-
SPDT
12 → 24V dc
-
-
Undervoltage
-
DIN Rail
-
-
-
-
-
-
0 → 30s
-
-
-
L
-20°C
66.5mm
-
-
Screw
1
89mm
-
+60°C
-
-
-
-
24V dc
12V dc
17.5 x 66.5 x 89mm
+60°C
17.5mm
RS Stock No.: 102-6136Brand: RS PRO
€ 85.30
€ 85.30 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
-
-
3
-
-
SPDT
-
-
-
Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-20°C
66.5mm
-
-
Screw
1
89mm
-
+60°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
-
-
-
-
-
17.5 x 66.5 x 89mm
+60°C
17.5mm
RS Stock No.: 223-7792Brand: RS PRO
€ 123.42
€ 123.42 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
-
-
3
-
-
SPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-20°C
66.5mm
-
-
Screw
-
-
-
+60°C
-
-
-
-
-
-
17.5 x 90 x 66.5mm
-20 → +60°C
90mm
RS Stock No.: 223-7795Brand: RS PRO
€ 140.36
€ 140.36 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
-
-
3
-
-
SPDT
Phase Loss, Voltage Assemmetry
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-20°C
66.5mm
-
-
Screw
-
-
-
+60°C
-
-
-
-
-
-
17.5 x 90 x 66.5mm
-20 → +60°C
90mm
RS Stock No.: 102-6135Brand: RS PRO
€ 81.07
€ 81.07 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
-
-
3
-
-
SPDT
Maximum of 280 V
-
-
Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
-20°C
66.5mm
-
-
Screw
1
89mm
-
+60°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
-
-
-
280V
-
17.5 x 66.5 x 89mm
+60°C
17.5mm
RS Stock No.: 223-7789Brand: RS PRO
€ 160.93
€ 160.93 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
3
-
-
DPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
2 → 999s
-
-
-
-
-10°C
66.21mm
-
-
Screw
-
-
-
+60°C
-
-
-
-
-
-
36 x 90 x 67mm
-10 → +60°C
36mm
RS Stock No.: 223-7790Brand: RS PRO
€ 173.03
€ 173.03 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
3
-
-
DPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
2 → 999s
-
-
-
-
-10°C
66.21mm
-
-
Screw
-
90mm
-
+60°C
-
-
-
-
-
-
36 x 90 x 67mm
-10 → +60°C
36mm
RS Stock No.: 223-7788Brand: RS PRO
€ 150.04
€ 150.04 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
-
-
3
-
-
SPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
-
-
-
-
-10°C
66.21mm
-
45Hz
Screw
-
-
-
+60°C
-
-
-
65Hz
-
-
36 x 90 x 67mm
-10 → +60°C
36mm
RS Stock No.: 223-7791Brand: RS PRO
€ 142.78
€ 142.78 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
-
-
3
-
-
SPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-20°C
66.5mm
-
-
Screw
-
-
-
+60°C
-
-
-
-
-
-
17.5 x 90 x 66.5mm
-20 → +60°C
90mm
RS Stock No.: 102-6133Brand: RS PRO
€ 150.04
€ 150.04 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
1
-
-
SPDT
Maximum of 500 V
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
0.1 → 30s
48 → 63Hz
-
-
L
-20°C
66.5mm
-
-
Screw
1
89mm
-
+60°C
-
-
-
-
500V
-
17.5 x 66.5 x 89mm
+60°C
17.5mm
RS Stock No.: 102-6134Brand: RS PRO
€ 150.04
€ 150.04 Each (Exc. Vat)
Check stock
1
RS Pro
Current
-
-
1
-
-
SPDT
-
-
-
-
-
DIN Rail
-
1A
-
10A
Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
-
-
L
-20°C
66.5mm
1 → 10A
-
Screw
1
89mm
-
+60°C
Green LED Indication for Supply Status
-
-
-
-
-
66.5 x 17.5 x 89mm
+60°C
17.5mm
RS Stock No.: 102-6137Brand: RS PRO
€ 110.11
€ 110.11 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
-
-
3
-
-
SPDT
-
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-20°C
66.5mm
-
-
Screw
1
89mm
-
+60°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
-
-
-
-
-
17.5 x 66.5 x 89mm
+60°C
17.5mm
RS Stock No.: 225-7388Brand: RS PRO
€ 145.20
€ 145.20 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
-
-
3
-
-
DPDT
243 → 540 V
-
-
Undervoltage
-
DIN Rail, Surface Mount
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
-
-
-
-
-20°C
89mm
-
-
Screw
-
66.5mm
-
+60°C
Microprocessor Based, Detects Incorrect Phase Sequence, Phase Loss And Neutral Loss, Adjustment For Under Voltage Trip Level, Adjustment For Time Delay
-
-
-
540V
243 V
89 x 17.5 x 66.5mm
-20 → +60°C
17.5mm
RS Stock No.: 225-7384Brand: RS PRO
€ 73.81
€ 73.81 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
-
-
3
-
-
-
-
-
-
-
-
DIN Rail, Surface Mount
-
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
-20°C
66.5mm
-
-
Screw
-
-
-
+60°C
3 LEDs for Phase presence status, Sequence Status,
-
-
-
-
-
-
-20 → +60°C
17.5mm
RS Stock No.: 225-7387Brand: RS PRO
€ 146.41
€ 146.41 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
-
-
3
-
-
DPDT
-
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
-
-
-
-
Screw
-
-
-
-
-
-
-
-
-
-
-
-
17.5mm
RS Stock No.: 102-6131Brand: RS PRO
€ 84.70
€ 84.70 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
1
-
-
SPDT
-
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
0.2 → 10s
48 → 63Hz
-
-
L
-20°C
66.5mm
-
63Hz
Screw
1
89mm
-
+60°C
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
-
-
48Hz
-
-
17.5 x 66.5 x 89mm
+60°C
17.5mm
...