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
P.O.A.
Check stock
1
RS Pro
Current
-
-
-
Three
-
-
1NO/1NC
-
-
-
DIN Rail Mount
-
-
40A
100A
-
-
-
0.1 → 20s
-
-
-
-
-
44 x 84.5 x 75mm
84.5mm
-20 to 55°C
CE
Error Delay Time Adjustable
44mm
-
-
-
-
-
-
-
-20°C
55°C
40 → 100A
75mm
-

RS Stock No.: 434-521Brand: RS PRO
P.O.A.
Check stock
1
RS Pro
Voltage
-
-
-
Single
-
120 → 300V ac
1NO
-
Overvoltage
-
DIN Rail Mount
-
-
-
-
-
-
-
0.1 → 600s
-
-
-
-
-
52.9 x 67.5 x 90.3mm
67.5mm
-20 to 55°C
CE
Built-In Current Transformer, Built-In Contactor
52.9mm
-
-
-
120V
300V
-
-
-20°C
55°C
-
90.3mm
-

RS Stock No.: 434-520Brand: RS PRO
P.O.A.
Check stock
1
RS Pro
Voltage
-
-
-
Three
-
230 → 460V ac
1NO/1NC
-
Overvoltage
-
DIN Rail or Panel
-
-
-
-
-
-
Phase Loss
0.1 → 10s
-
-
-
-
-
44 x 84.5 x 75mm
84.5mm
-20 to 55°C
CE
Phase Sequence Control, With PTC, Non-Neutral
44mm
-
-
-
230V
460V
-
-
-20°C
55°C
-
75mm
-

RS Stock No.: 102-6130Brand: RS PRO
₪ 468.20
₪ 468.20 Each (ex VAT)
Check stock
1
RS Pro
Voltage
-
-
-
1
-
12 → 24V dc
SPDT
-
Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
0 → 30s
-
-
-
L
-
17.5 x 66.5 x 89mm
17.5mm
+60°C
-
-
66.5mm
1
-
-
12V dc
24V dc
-
Screw
-20°C
+60°C
-
89mm
-

RS Stock No.: 102-6136Brand: RS PRO
₪ 526.90
₪ 526.90 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
-
-
-
3
-
-
SPDT
-
Undervoltage
-
DIN Rail
-
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
17.5 x 66.5 x 89mm
17.5mm
+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
66.5mm
1
-
-
-
-
-
Screw
-20°C
+60°C
-
89mm
-

RS Stock No.: 102-6135Brand: RS PRO
₪ 501.28
₪ 501.28 Each (ex 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
-
17.5 x 66.5 x 89mm
17.5mm
+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
66.5mm
1
-
-
-
280V
-
Screw
-20°C
+60°C
-
89mm
-

RS Stock No.: 102-6133Brand: RS PRO
₪ 921.70
₪ 921.70 Each (ex VAT)
Check stock
1
RS Pro
Voltage
-
-
-
1
-
Maximum of 500 V
SPDT
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
0.1 → 30s
48 → 63Hz
-
-
L
-
17.5 x 66.5 x 89mm
17.5mm
+60°C
-
-
66.5mm
1
-
-
-
500V
-
Screw
-20°C
+60°C
-
89mm
-

RS Stock No.: 102-6134Brand: RS PRO
₪ 922.03
₪ 922.03 Each (ex VAT)
Check stock
1
RS Pro
Current
-
-
-
1
-
-
SPDT
-
-
-
DIN Rail
-
-
1A
10A
-
Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
-
-
L
-
66.5 x 17.5 x 89mm
17.5mm
+60°C
-
Green LED Indication for Supply Status
66.5mm
1
-
-
-
-
-
Screw
-20°C
+60°C
1 → 10A
89mm
-

RS Stock No.: 102-6137Brand: RS PRO
₪ 677.10
₪ 677.10 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
-
-
-
3
-
-
SPDT
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
17.5 x 66.5 x 89mm
17.5mm
+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
66.5mm
1
-
-
-
-
-
Screw
-20°C
+60°C
-
89mm
-

RS Stock No.: 102-6131Brand: RS PRO
₪ 526.90
₪ 526.90 Each (ex VAT)
Check stock
1
RS Pro
Voltage
-
-
-
1
-
-
SPDT
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
0.2 → 10s
48 → 63Hz
-
-
L
-
17.5 x 66.5 x 89mm
17.5mm
+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
66.5mm
1
-
-
-
-
48Hz
Screw
-20°C
+60°C
-
89mm
63Hz

RS Stock No.: 223-7795Brand: RS PRO
P.O.A.
Check stock
1
RS Pro
Phase
-
-
-
3
-
Phase Loss, Voltage Assemmetry
SPDT
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
17.5 x 90 x 66.5mm
90mm
-20 → +60°C
-
-
66.5mm
-
-
-
-
-
-
Screw
-20°C
+60°C
-
-
-

RS Stock No.: 223-7789Brand: RS PRO
P.O.A.
Check stock
1
RS Pro
Voltage
-
-
-
3
-
-
DPDT
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
36 x 90 x 67mm
36mm
-10 → +60°C
-
-
66.21mm
-
-
-
-
-
-
Screw
-10°C
+60°C
-
-
-

RS Stock No.: 223-7790Brand: RS PRO
P.O.A.
Check stock
1
RS Pro
Voltage
-
-
-
3
-
-
DPDT
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
36 x 90 x 67mm
36mm
-10 → +60°C
-
-
66.21mm
-
-
-
-
-
-
Screw
-10°C
+60°C
-
90mm
-

RS Stock No.: 223-7788Brand: RS PRO
P.O.A.
Check stock
1
RS Pro
Phase, Voltage
-
-
-
3
-
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
-
-
-
-
-
36 x 90 x 67mm
36mm
-10 → +60°C
-
-
66.21mm
-
-
-
-
-
65Hz
Screw
-10°C
+60°C
-
-
45Hz

RS Stock No.: 223-7791Brand: RS PRO
P.O.A.
Check stock
1
RS Pro
Phase
-
-
-
3
-
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
17.5 x 90 x 66.5mm
90mm
-20 → +60°C
-
-
66.5mm
-
-
-
-
-
-
Screw
-20°C
+60°C
-
-
-

RS Stock No.: 225-7388Brand: RS PRO
P.O.A.
Check stock
1
RS Pro
Phase, Voltage
-
-
-
3
-
243 → 540 V
DPDT
-
Undervoltage
-
DIN Rail, Surface Mount
-
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
-
-
-
-
-
89 x 17.5 x 66.5mm
17.5mm
-20 → +60°C
-
Microprocessor Based, Detects Incorrect Phase Sequence, Phase Loss And Neutral Loss, Adjustment For Under Voltage Trip Level, Adjustment For Time Delay
89mm
-
-
-
243 V
540V
-
Screw
-20°C
+60°C
-
66.5mm
-

RS Stock No.: 132-174Brand: RS PRO
P.O.A.
Check stock
1

RS Stock No.: 132-171Brand: RS PRO
P.O.A.
Check stock
1

RS Stock No.: 225-7384Brand: RS PRO
P.O.A.
Check stock
1
RS Pro
Phase
-
-
-
3
-
-
-
-
-
-
DIN Rail, Surface Mount
-
-
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
-
-
17.5mm
-20 → +60°C
-
3 LEDs for Phase presence status, Sequence Status,
66.5mm
-
-
-
-
-
-
Screw
-20°C
+60°C
-
-
-

RS Stock No.: 122-217Brand: RS PRO
P.O.A.
Check stock
1
...