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 1300 products
RS Stock No.: 434-506Brand: RS PRO
€ 57.84
€ 57.84 Each (Exc. Vat)
Check stock
1
RS Pro
Current
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-
-
Three
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1NO/1NC
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-
-
-
DIN Rail Mount
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-
40A
100A
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-
-
0.1 → 20s
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-
-
-
-
-20°C
CE
Error Delay Time Adjustable
44 x 84.5 x 75mm
44mm
55°C
-
75mm
-
40 → 100A
-
-
84.5mm
-
-
-
-
-20 to 55°C
RS Stock No.: 434-521Brand: RS PRO
€ 52.76
€ 52.76 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
-
Single
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1NO
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120 → 300V ac
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Overvoltage
DIN Rail Mount
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-
-
-
-
-
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0.1 → 600s
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-
-
-
-
-20°C
CE
Built-In Current Transformer, Built-In Contactor
52.9 x 67.5 x 90.3mm
52.9mm
55°C
-
90.3mm
300V
-
-
-
67.5mm
-
-
-
120V
-20 to 55°C
RS Stock No.: 434-520Brand: RS PRO
€ 41.87
€ 41.87 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
-
Three
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1NO/1NC
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230 → 460V ac
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Overvoltage
DIN Rail or Panel
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-
-
-
-
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Phase Loss
0.1 → 10s
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-
-
-
-
-20°C
CE
Phase Sequence Control, With PTC, Non-Neutral
44 x 84.5 x 75mm
44mm
55°C
-
75mm
460V
-
-
-
84.5mm
-
-
-
230V
-20 to 55°C
RS Stock No.: 132-174Brand: RS PRO
€ 29.16
€ 29.16 Each (Exc. Vat)
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1
RS Stock No.: 132-171Brand: RS PRO
€ 26.74
€ 26.74 Each (Exc. Vat)
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1
RS Stock No.: 122-217Brand: RS PRO
€ 13.19
€ 13.19 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-172Brand: RS PRO
€ 18.03
€ 18.03 Each (Exc. Vat)
Check stock
1
RS Stock No.: 132-173Brand: RS PRO
€ 22.51
€ 22.51 Each (Exc. Vat)
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1
RS Stock No.: 122-216Brand: RS PRO
€ 18.15
€ 18.15 Each (Exc. Vat)
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1
RS Stock No.: 122-215Brand: RS PRO
€ 27.59
€ 27.59 Each (Exc. Vat)
Check stock
1
RS Stock No.: 122-210Brand: RS PRO
€ 20.69
€ 20.69 Each (Exc. Vat)
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1
RS Stock No.: 122-212Brand: RS PRO
€ 24.32
€ 24.32 Each (Exc. Vat)
Check stock
1
RS Stock No.: 102-6130Brand: RS PRO
€ 78.04
€ 78.04 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
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-
-
1
-
SPDT
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12 → 24V dc
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Undervoltage
DIN Rail
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-
-
-
-
-
-
0 → 30s
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-
-
L
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-20°C
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-
17.5 x 66.5 x 89mm
66.5mm
+60°C
Screw
89mm
24V dc
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1
-
17.5mm
-
-
-
12V dc
+60°C
RS Stock No.: 102-6136Brand: RS PRO
€ 85.30
€ 85.30 Each (Exc. Vat)
Check stock
1
RS Pro
Phase, Voltage
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-
-
3
-
SPDT
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-
-
Undervoltage
DIN Rail
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-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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-
L
-
-20°C
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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
66.5mm
+60°C
Screw
89mm
-
-
1
-
17.5mm
-
-
-
-
+60°C
RS Stock No.: 223-7795Brand: RS PRO
€ 140.36
€ 140.36 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
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-
-
3
-
SPDT
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Phase Loss, Voltage Assemmetry
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-
DIN Rail
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-
-
-
-
-
-
-
-
-
-
-
-
-20°C
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-
17.5 x 90 x 66.5mm
66.5mm
+60°C
Screw
-
-
-
-
-
90mm
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-
-
-
-20 → +60°C
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
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Undervoltage
DIN Rail
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-
-
-
-
-
Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
-
-20°C
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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
17.5 x 66.5 x 89mm
66.5mm
+60°C
Screw
89mm
280V
-
1
-
17.5mm
-
-
-
-
+60°C
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
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-
-
-
-
-
-
2 → 999s
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-
-
-
-
-10°C
-
-
36 x 90 x 67mm
66.21mm
+60°C
Screw
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-
-
-
-
36mm
-
-
-
-
-10 → +60°C
RS Stock No.: 223-7790Brand: RS PRO
€ 171.82
€ 171.82 Each (Exc. Vat)
Check stock
1
RS Pro
Voltage
-
-
-
3
-
DPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
-10°C
-
-
36 x 90 x 67mm
66.21mm
+60°C
Screw
90mm
-
-
-
-
36mm
-
-
-
-
-10 → +60°C
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
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-
-
-
-
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Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
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-
-
-
-
-10°C
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-
36 x 90 x 67mm
66.21mm
+60°C
Screw
-
-
-
-
45Hz
36mm
-
65Hz
-
-
-10 → +60°C
RS Stock No.: 223-7791Brand: RS PRO
€ 142.78
€ 142.78 Each (Exc. Vat)
Check stock
1
RS Pro
Phase
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-
-
3
-
SPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
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-20°C
-
-
17.5 x 90 x 66.5mm
66.5mm
+60°C
Screw
-
-
-
-
-
90mm
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-
-
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-20 → +60°C
...