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 1195 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.: 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.: 122-216Brand: RS PRO
BD 8.125
BD 8.125 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.: 122-215Brand: RS PRO
BD 12.306
BD 12.306 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
12 → 24V dc
SPDT
Undervoltage
-
DIN Rail
-
-
-
-
-
-
0 → 30s
-
-
-
L
-
1
-
-
-
24V dc
12V dc
-
-
Screw
+60°C
+60°C
17.5mm
17.5 x 66.5 x 89mm
-20°C
66.5mm
89mm
-
-
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
-
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
-
-
-
-
-
Screw
+60°C
+60°C
17.5mm
17.5 x 66.5 x 89mm
-20°C
66.5mm
89mm
-
-
RS Stock No.: 223-7795Brand: RS PRO
BD 62.521
BD 62.521 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
3
Phase Loss, Voltage Assemmetry
SPDT
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
+60°C
-20 → +60°C
90mm
17.5 x 90 x 66.5mm
-20°C
66.5mm
-
-
-
RS Stock No.: 102-6135Brand: RS PRO
BD 36.161
BD 36.161 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
3
Maximum of 280 V
SPDT
Undervoltage
-
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
-
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
-
280V
-
-
-
Screw
+60°C
+60°C
17.5mm
17.5 x 66.5 x 89mm
-20°C
66.5mm
89mm
-
-
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
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
+60°C
-10 → +60°C
36mm
36 x 90 x 67mm
-10°C
66.21mm
-
-
-
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
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
+60°C
-10 → +60°C
36mm
36 x 90 x 67mm
-10°C
66.21mm
90mm
-
-
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
-
-
-
-
-
-
45Hz
-
65Hz
-
-
-
-
Screw
+60°C
-10 → +60°C
36mm
36 x 90 x 67mm
-10°C
66.21mm
-
-
-
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
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
+60°C
-20 → +60°C
90mm
17.5 x 90 x 66.5mm
-20°C
66.5mm
-
-
-
RS Stock No.: 102-6133Brand: RS PRO
BD 66.653
BD 66.653 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
1
Maximum of 500 V
SPDT
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
0.1 → 30s
48 → 63Hz
-
-
L
-
1
-
-
-
500V
-
-
-
Screw
+60°C
+60°C
17.5mm
17.5 x 66.5 x 89mm
-20°C
66.5mm
89mm
-
-
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
-
1
-
Green LED Indication for Supply Status
-
-
-
-
-
Screw
+60°C
+60°C
17.5mm
66.5 x 17.5 x 89mm
-20°C
66.5mm
89mm
1 → 10A
-
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
-
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
-
-
-
-
-
Screw
+60°C
+60°C
17.5mm
17.5 x 66.5 x 89mm
-20°C
66.5mm
89mm
-
-
...