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 1288 products
RS Stock No.: 132-174Brand: RS PRO
BD 13.455
BD 13.455 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-171Brand: RS PRO
BD 12.439
BD 12.439 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-217Brand: RS PRO
BD 6.014
BD 6.014 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-216Brand: RS PRO
BD 8.125
BD 8.125 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-172Brand: RS PRO
BD 8.071
BD 8.071 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-173Brand: RS PRO
BD 10.171
BD 10.171 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-215Brand: RS PRO
BD 12.306
BD 12.306 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-210Brand: RS PRO
BD 9.324
BD 9.324 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-212Brand: RS PRO
BD 10.926
BD 10.926 Each (Exc. Vat)
Check stock
1
RS Stock No.: 102-6130Brand: RS PRO
BD 34.703
BD 34.703 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
1
SPDT
12 → 24V dc
-
Undervoltage
DIN Rail
-
-
-
-
-
-
0 → 30s
-
-
-
L
-
+60°C
-20°C
-
-
12V dc
24V dc
-
17.5mm
1
-
89mm
66.5mm
-
17.5 x 66.5 x 89mm
-
-
+60°C
Screw
RS Stock No.: 102-6136Brand: RS PRO
BD 37.861
BD 37.861 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
-
-
-
-
-
17.5mm
1
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
89mm
66.5mm
-
17.5 x 66.5 x 89mm
-
-
+60°C
Screw
RS Stock No.: 223-7795Brand: RS PRO
BD 62.521
BD 62.521 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
3
SPDT
Phase Loss, Voltage Assemmetry
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
+60°C
-20°C
-
-
-
-
-
90mm
-
-
-
66.5mm
-
17.5 x 90 x 66.5mm
-
-
-20 → +60°C
Screw
RS Stock No.: 102-6135Brand: RS PRO
BD 36.161
BD 36.161 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
-
-
-
280V
-
17.5mm
1
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
89mm
66.5mm
-
17.5 x 66.5 x 89mm
-
-
+60°C
Screw
RS Stock No.: 223-7789Brand: RS PRO
BD 71.650
BD 71.650 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
3
DPDT
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
+60°C
-10°C
-
-
-
-
-
36mm
-
-
-
66.21mm
-
36 x 90 x 67mm
-
-
-10 → +60°C
Screw
RS Stock No.: 223-7790Brand: RS PRO
BD 76.714
BD 76.714 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
3
DPDT
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
+60°C
-10°C
-
-
-
-
-
36mm
-
-
90mm
66.21mm
-
36 x 90 x 67mm
-
-
-10 → +60°C
Screw
RS Stock No.: 223-7788Brand: RS PRO
BD 66.581
BD 66.581 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
-
-
-
-
65Hz
36mm
-
-
-
66.21mm
-
36 x 90 x 67mm
-
45Hz
-10 → +60°C
Screw
RS Stock No.: 223-7791Brand: RS PRO
BD 63.634
BD 63.634 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
3
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
+60°C
-20°C
-
-
-
-
-
90mm
-
-
-
66.5mm
-
17.5 x 90 x 66.5mm
-
-
-20 → +60°C
Screw
RS Stock No.: 102-6133Brand: RS PRO
BD 66.653
BD 66.653 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
-
+60°C
-20°C
-
-
-
500V
-
17.5mm
1
-
89mm
66.5mm
-
17.5 x 66.5 x 89mm
-
-
+60°C
Screw
RS Stock No.: 102-6134Brand: RS PRO
BD 66.653
BD 66.653 Each (Exc. Vat)
Check stock
1
RS Pro
Current
1
SPDT
-
-
-
DIN Rail
-
1A
-
10A
Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
-
-
L
-
+60°C
-20°C
-
-
-
-
-
17.5mm
1
Green LED Indication for Supply Status
89mm
66.5mm
-
66.5 x 17.5 x 89mm
1 → 10A
-
+60°C
Screw
RS Stock No.: 102-6137Brand: RS PRO
BD 48.920
BD 48.920 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
-
+60°C
-20°C
-
-
-
-
-
17.5mm
1
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
89mm
66.5mm
-
17.5 x 66.5 x 89mm
-
-
+60°C
Screw
...