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
€ 46.22
€ 46.22 Each (Exc. VAT)
Check stock
1
RS Pro
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Current
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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75mm
-20 to 55°C
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44 x 84.5 x 75mm
CE
Error Delay Time Adjustable
-20°C
55°C
84.5mm
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40 → 100A
44mm
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RS Stock No.: 434-521Brand: RS PRO
€ 42.16
€ 42.16 Each (Exc. VAT)
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1
RS Pro
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Voltage
Single
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120 → 300V ac
1NO
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Overvoltage
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DIN Rail Mount
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0.1 → 600s
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90.3mm
-20 to 55°C
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52.9 x 67.5 x 90.3mm
CE
Built-In Current Transformer, Built-In Contactor
-20°C
55°C
67.5mm
300V
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120V
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52.9mm
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RS Stock No.: 434-520Brand: RS PRO
€ 33.53
€ 33.53 Each (Exc. VAT)
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1
RS Pro
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Voltage
Three
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230 → 460V ac
1NO/1NC
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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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75mm
-20 to 55°C
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44 x 84.5 x 75mm
CE
Phase Sequence Control, With PTC, Non-Neutral
-20°C
55°C
84.5mm
460V
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230V
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44mm
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RS Stock No.: 132-174Brand: RS PRO
€ 23.30
€ 23.30 Each (Exc. VAT)
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1
RS Stock No.: 132-171Brand: RS PRO
€ 21.41
€ 21.41 Each (Exc. VAT)
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1
RS Stock No.: 122-217Brand: RS PRO
€ 10.56
€ 10.56 Each (Exc. VAT)
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1
RS Stock No.: 122-216Brand: RS PRO
€ 14.50
€ 14.50 Each (Exc. VAT)
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1
RS Stock No.: 132-172Brand: RS PRO
€ 14.40
€ 14.40 Each (Exc. VAT)
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1
RS Stock No.: 132-173Brand: RS PRO
€ 18.03
€ 18.03 Each (Exc. VAT)
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1
RS Stock No.: 122-215Brand: RS PRO
€ 22.11
€ 22.11 Each (Exc. VAT)
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1
RS Stock No.: 122-210Brand: RS PRO
€ 16.54
€ 16.54 Each (Exc. VAT)
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1
RS Stock No.: 122-212Brand: RS PRO
€ 19.44
€ 19.44 Each (Exc. VAT)
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1
RS Stock No.: 102-6130Brand: RS PRO
€ 62.38
€ 62.38 Each (Exc. VAT)
Check stock
1
RS Pro
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Voltage
1
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12 → 24V dc
SPDT
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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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89mm
+60°C
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17.5 x 66.5 x 89mm
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-20°C
+60°C
17.5mm
24V dc
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12V dc
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66.5mm
Screw
1
RS Stock No.: 102-6136Brand: RS PRO
€ 68.05
€ 68.05 Each (Exc. VAT)
Check stock
1
RS Pro
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Phase, Voltage
3
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SPDT
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Undervoltage
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DIN Rail
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Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
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L
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89mm
+60°C
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17.5 x 66.5 x 89mm
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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
-20°C
+60°C
17.5mm
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66.5mm
Screw
1
RS Stock No.: 223-7795Brand: RS PRO
€ 112.38
€ 112.38 Each (Exc. VAT)
Check stock
1
RS Pro
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Phase
3
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Phase Loss, Voltage Assemmetry
SPDT
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DIN Rail
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-20 → +60°C
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17.5 x 90 x 66.5mm
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-20°C
+60°C
90mm
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66.5mm
Screw
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RS Stock No.: 102-6135Brand: RS PRO
€ 64.99
€ 64.99 Each (Exc. VAT)
Check stock
1
RS Pro
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Phase, Voltage
3
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Maximum of 280 V
SPDT
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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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89mm
+60°C
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17.5 x 66.5 x 89mm
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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
-20°C
+60°C
17.5mm
280V
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66.5mm
Screw
1
RS Stock No.: 223-7789Brand: RS PRO
€ 128.78
€ 128.78 Each (Exc. VAT)
Check stock
1
RS Pro
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Voltage
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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-10 → +60°C
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36 x 90 x 67mm
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-10°C
+60°C
36mm
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66.21mm
Screw
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RS Stock No.: 223-7790Brand: RS PRO
€ 137.88
€ 137.88 Each (Exc. VAT)
Check stock
1
RS Pro
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Voltage
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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90mm
-10 → +60°C
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36 x 90 x 67mm
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-10°C
+60°C
36mm
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66.21mm
Screw
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RS Stock No.: 223-7788Brand: RS PRO
€ 119.67
€ 119.67 Each (Exc. VAT)
Check stock
1
RS Pro
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Phase, Voltage
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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-10 → +60°C
45Hz
36 x 90 x 67mm
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-10°C
+60°C
36mm
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65Hz
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66.21mm
Screw
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RS Stock No.: 223-7791Brand: RS PRO
€ 114.37
€ 114.37 Each (Exc. VAT)
Check stock
1
RS Pro
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Phase
3
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SPDT
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Overvoltage Protection, Undervoltage Protection
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DIN Rail
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-20 → +60°C
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17.5 x 90 x 66.5mm
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-20°C
+60°C
90mm
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66.5mm
Screw
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