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
RS Stock No.: 434-506Brand: RS PRO
€ 59.49
€ 59.49 Each (Exc. Vat)
Check stock
1
RS Pro
Current
-
-
-
-
Three
1NO/1NC
-
-
-
-
-
-
DIN Rail Mount
40A
100A
-
-
-
0.1 → 20s
-
-
-
-
-
55°C
-20°C
75mm
44 x 84.5 x 75mm
84.5mm
-
44mm
-
-
40 → 100A
-
Error Delay Time Adjustable
CE
-
-
-
-
-20 to 55°C
RS Stock No.: 434-521Brand: RS PRO
€ 54.22
€ 54.22 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
-
-
Single
1NO
-
120 → 300V ac
-
Overvoltage
-
-
DIN Rail Mount
-
-
-
-
-
0.1 → 600s
-
-
-
-
-
55°C
-20°C
90.3mm
52.9 x 67.5 x 90.3mm
67.5mm
-
52.9mm
-
-
-
-
Built-In Current Transformer, Built-In Contactor
CE
-
300V
120V
-
-20 to 55°C
RS Stock No.: 434-520Brand: RS PRO
€ 43.17
€ 43.17 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
-
-
Three
1NO/1NC
-
230 → 460V ac
-
Overvoltage
-
-
DIN Rail or Panel
-
-
-
-
Phase Loss
0.1 → 10s
-
-
-
-
-
55°C
-20°C
75mm
44 x 84.5 x 75mm
84.5mm
-
44mm
-
-
-
-
Phase Sequence Control, With PTC, Non-Neutral
CE
-
460V
230V
-
-20 to 55°C
RS Stock No.: 132-174Brand: RS PRO
€ 29.99
€ 29.99 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-171Brand: RS PRO
€ 27.48
€ 27.48 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-217Brand: RS PRO
€ 13.55
€ 13.55 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-172Brand: RS PRO
€ 18.57
€ 18.57 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-173Brand: RS PRO
€ 23.22
€ 23.22 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-216Brand: RS PRO
€ 18.70
€ 18.70 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-215Brand: RS PRO
€ 28.49
€ 28.49 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-210Brand: RS PRO
€ 21.34
€ 21.34 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-212Brand: RS PRO
€ 24.97
€ 24.97 Each (Exc. Vat)
Check stock
1
RS Stock No.: 102-6130Brand: RS PRO
€ 80.32
€ 80.32 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
-
-
1
SPDT
-
12 → 24V dc
-
Undervoltage
-
-
DIN Rail
-
-
-
-
-
0 → 30s
-
-
-
L
-
+60°C
-20°C
89mm
17.5 x 66.5 x 89mm
17.5mm
-
66.5mm
1
-
-
Screw
-
-
-
24V dc
12V dc
-
+60°C
RS Stock No.: 102-6136Brand: RS PRO
€ 87.85
€ 87.85 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
-
+60°C
-20°C
89mm
17.5 x 66.5 x 89mm
17.5mm
-
66.5mm
1
-
-
Screw
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
-
-
-
-
-
+60°C
RS Stock No.: 223-7795Brand: RS PRO
€ 144.32
€ 144.32 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
-
-
-
-
3
SPDT
-
Phase Loss, Voltage Assemmetry
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
+60°C
-20°C
-
17.5 x 90 x 66.5mm
90mm
-
66.5mm
-
-
-
Screw
-
-
-
-
-
-
-20 → +60°C
RS Stock No.: 102-6135Brand: RS PRO
€ 83.46
€ 83.46 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
-
+60°C
-20°C
89mm
17.5 x 66.5 x 89mm
17.5mm
-
66.5mm
1
-
-
Screw
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
-
-
+60°C
RS Stock No.: 223-7789Brand: RS PRO
€ 165.66
€ 165.66 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
-
-
3
DPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
-
+60°C
-10°C
-
36 x 90 x 67mm
36mm
-
66.21mm
-
-
-
Screw
-
-
-
-
-
-
-10 → +60°C
RS Stock No.: 223-7790Brand: RS PRO
€ 176.96
€ 176.96 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
-
-
3
DPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
-
+60°C
-10°C
90mm
36 x 90 x 67mm
36mm
-
66.21mm
-
-
-
Screw
-
-
-
-
-
-
-10 → +60°C
RS Stock No.: 223-7788Brand: RS PRO
€ 154.36
€ 154.36 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
-
-
-
-
-
+60°C
-10°C
-
36 x 90 x 67mm
36mm
45Hz
66.21mm
-
-
-
Screw
-
-
-
-
-
65Hz
-10 → +60°C
RS Stock No.: 223-7791Brand: RS PRO
€ 146.84
€ 146.84 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
-
-
-
-
3
SPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
+60°C
-20°C
-
17.5 x 90 x 66.5mm
90mm
-
66.5mm
-
-
-
Screw
-
-
-
-
-
-
-20 → +60°C
...