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 1291 products
RS Stock No.: 434-506Brand: RS PRO
€ 46.01
€ 46.01 Each (ex 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
40A
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100A
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0.1 → 20s
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55°C
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Error Delay Time Adjustable
CE
44mm
75mm
40 → 100A
44 x 84.5 x 75mm
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-
-
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-20°C
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84.5mm
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-20 to 55°C
RS Stock No.: 434-521Brand: RS PRO
€ 41.96
€ 41.96 Each (ex VAT)
Check stock
1
RS Pro
Voltage
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Single
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1NO
120 → 300V ac
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Overvoltage
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DIN Rail Mount
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0.1 → 600s
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55°C
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Built-In Current Transformer, Built-In Contactor
CE
52.9mm
90.3mm
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52.9 x 67.5 x 90.3mm
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-
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300V
120V
-20°C
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67.5mm
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-20 to 55°C
RS Stock No.: 434-520Brand: RS PRO
€ 33.38
€ 33.38 Each (ex VAT)
Check stock
1
RS Pro
Voltage
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Three
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1NO/1NC
230 → 460V ac
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Overvoltage
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DIN Rail or Panel
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Phase Loss
0.1 → 10s
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55°C
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Phase Sequence Control, With PTC, Non-Neutral
CE
44mm
75mm
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44 x 84.5 x 75mm
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-
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460V
230V
-20°C
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84.5mm
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-20 to 55°C
RS Stock No.: 132-174Brand: RS PRO
€ 23.20
€ 23.20 Each (ex VAT)
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1
RS Stock No.: 132-171Brand: RS PRO
€ 21.31
€ 21.31 Each (ex VAT)
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1
RS Stock No.: 122-217Brand: RS PRO
€ 10.51
€ 10.51 Each (ex VAT)
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1
RS Stock No.: 122-216Brand: RS PRO
€ 14.43
€ 14.43 Each (ex VAT)
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1
RS Stock No.: 132-172Brand: RS PRO
€ 14.33
€ 14.33 Each (ex VAT)
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1
RS Stock No.: 132-173Brand: RS PRO
€ 17.95
€ 17.95 Each (ex VAT)
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1
RS Stock No.: 122-215Brand: RS PRO
€ 22.00
€ 22.00 Each (ex VAT)
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1
RS Stock No.: 122-210Brand: RS PRO
€ 16.47
€ 16.47 Each (ex VAT)
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1
RS Stock No.: 122-212Brand: RS PRO
€ 19.35
€ 19.35 Each (ex VAT)
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1
RS Stock No.: 102-6130Brand: RS PRO
€ 62.09
€ 62.09 Each (ex VAT)
Check stock
1
RS Pro
Voltage
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1
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SPDT
12 → 24V dc
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Undervoltage
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DIN Rail
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0 → 30s
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L
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+60°C
Screw
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66.5mm
89mm
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17.5 x 66.5 x 89mm
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24V dc
12V dc
-20°C
1
17.5mm
-
+60°C
RS Stock No.: 102-6136Brand: RS PRO
€ 67.74
€ 67.74 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
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-
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3
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SPDT
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Undervoltage
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DIN Rail
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-
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Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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L
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+60°C
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
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66.5mm
89mm
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17.5 x 66.5 x 89mm
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-20°C
1
17.5mm
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+60°C
RS Stock No.: 223-7795Brand: RS PRO
€ 111.85
€ 111.85 Each (ex VAT)
Check stock
1
RS Pro
Phase
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3
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SPDT
Phase Loss, Voltage Assemmetry
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DIN Rail
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+60°C
Screw
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66.5mm
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17.5 x 90 x 66.5mm
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-20°C
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90mm
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-20 → +60°C
RS Stock No.: 102-6135Brand: RS PRO
€ 64.69
€ 64.69 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
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-
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3
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SPDT
Maximum of 280 V
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Undervoltage
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DIN Rail
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Phase Failure, Phase Sequence
100ms
48 → 63Hz
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L
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+60°C
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
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66.5mm
89mm
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17.5 x 66.5 x 89mm
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280V
-
-20°C
1
17.5mm
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+60°C
RS Stock No.: 223-7789Brand: RS PRO
€ 128.19
€ 128.19 Each (ex VAT)
Check stock
1
RS Pro
Voltage
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-
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3
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DPDT
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-
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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+60°C
Screw
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66.21mm
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36 x 90 x 67mm
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-10°C
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36mm
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-10 → +60°C
RS Stock No.: 223-7790Brand: RS PRO
€ 137.24
€ 137.24 Each (ex VAT)
Check stock
1
RS Pro
Voltage
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-
-
3
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DPDT
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-
-
Overvoltage Protection, Undervoltage Protection
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DIN Rail
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2 → 999s
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+60°C
Screw
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66.21mm
90mm
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36 x 90 x 67mm
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-10°C
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36mm
-
-10 → +60°C
RS Stock No.: 223-7788Brand: RS PRO
€ 119.12
€ 119.12 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
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3
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SPDT
-
-
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
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+60°C
Screw
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66.21mm
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36 x 90 x 67mm
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65Hz
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-
-10°C
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36mm
45Hz
-10 → +60°C
RS Stock No.: 223-7791Brand: RS PRO
€ 113.84
€ 113.84 Each (ex VAT)
Check stock
1
RS Pro
Phase
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3
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SPDT
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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+60°C
Screw
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66.5mm
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17.5 x 90 x 66.5mm
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-20°C
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90mm
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-20 → +60°C
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