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 1301 products
RS Stock No.: 434-506Brand: RS PRO
€ 97.87
€ 97.87 Each (Exc. VAT)
Check stock
1
RS Pro
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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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40 → 100A
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-20 to 55°C
75mm
CE
Error Delay Time Adjustable
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55°C
-20°C
44 x 84.5 x 75mm
44mm
84.5mm
RS Stock No.: 434-521Brand: RS PRO
€ 89.28
€ 89.28 Each (Exc. VAT)
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1
RS Pro
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Voltage
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Single
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120 → 300V ac
1NO
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Overvoltage
DIN Rail Mount
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0.1 → 600s
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120V
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300V
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-20 to 55°C
90.3mm
CE
Built-In Current Transformer, Built-In Contactor
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55°C
-20°C
52.9 x 67.5 x 90.3mm
52.9mm
67.5mm
RS Stock No.: 434-520Brand: RS PRO
€ 71.01
€ 71.01 Each (Exc. VAT)
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1
RS Pro
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Voltage
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Three
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230 → 460V ac
1NO/1NC
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Overvoltage
DIN Rail or Panel
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Phase Loss
0.1 → 10s
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230V
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460V
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-20 to 55°C
75mm
CE
Phase Sequence Control, With PTC, Non-Neutral
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55°C
-20°C
44 x 84.5 x 75mm
44mm
84.5mm
RS Stock No.: 132-174Brand: RS PRO
€ 49.36
€ 49.36 Each (Exc. VAT)
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1
RS Stock No.: 132-171Brand: RS PRO
€ 45.35
€ 45.35 Each (Exc. VAT)
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1
RS Stock No.: 122-217Brand: RS PRO
€ 22.36
€ 22.36 Each (Exc. VAT)
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1
RS Stock No.: 122-216Brand: RS PRO
€ 30.73
€ 30.73 Each (Exc. VAT)
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1
RS Stock No.: 132-172Brand: RS PRO
€ 30.50
€ 30.50 Each (Exc. VAT)
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1
RS Stock No.: 132-173Brand: RS PRO
€ 38.16
€ 38.16 Each (Exc. VAT)
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1
RS Stock No.: 122-210Brand: RS PRO
€ 35.05
€ 35.05 Each (Exc. VAT)
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1
RS Stock No.: 122-215Brand: RS PRO
€ 46.80
€ 46.80 Each (Exc. VAT)
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1
RS Stock No.: 122-212Brand: RS PRO
€ 41.18
€ 41.18 Each (Exc. VAT)
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1
RS Stock No.: 102-6130Brand: RS PRO
€ 132.10
€ 132.10 Each (Exc. VAT)
Check stock
1
RS Pro
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Voltage
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1
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12 → 24V dc
SPDT
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Undervoltage
DIN Rail
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0 → 30s
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L
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Screw
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12V dc
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24V dc
1
+60°C
89mm
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+60°C
-20°C
17.5 x 66.5 x 89mm
66.5mm
17.5mm
RS Stock No.: 102-6136Brand: RS PRO
€ 144.11
€ 144.11 Each (Exc. VAT)
Check stock
1
RS Pro
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Phase, Voltage
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3
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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
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Screw
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1
+60°C
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
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+60°C
-20°C
17.5 x 66.5 x 89mm
66.5mm
17.5mm
RS Stock No.: 223-7795Brand: RS PRO
€ 237.97
€ 237.97 Each (Exc. VAT)
Check stock
1
RS Pro
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Phase
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3
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Phase Loss, Voltage Assemmetry
SPDT
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DIN Rail
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Screw
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-20 → +60°C
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+60°C
-20°C
17.5 x 90 x 66.5mm
66.5mm
90mm
RS Stock No.: 102-6135Brand: RS PRO
€ 137.64
€ 137.64 Each (Exc. VAT)
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1
RS Pro
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Phase, Voltage
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3
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Maximum of 280 V
SPDT
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Undervoltage
DIN Rail
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Phase Failure, Phase Sequence
100ms
48 → 63Hz
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L
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Screw
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280V
1
+60°C
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
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+60°C
-20°C
17.5 x 66.5 x 89mm
66.5mm
17.5mm
RS Stock No.: 223-7789Brand: RS PRO
€ 272.71
€ 272.71 Each (Exc. VAT)
Check stock
1
RS Pro
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Voltage
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3
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DPDT
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Overvoltage Protection, Undervoltage Protection
DIN Rail
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2 → 999s
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Screw
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-10 → +60°C
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+60°C
-10°C
36 x 90 x 67mm
66.21mm
36mm
RS Stock No.: 223-7790Brand: RS PRO
€ 291.98
€ 291.98 Each (Exc. VAT)
Check stock
1
RS Pro
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Voltage
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3
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DPDT
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Overvoltage Protection, Undervoltage Protection
DIN Rail
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2 → 999s
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Screw
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-10 → +60°C
90mm
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+60°C
-10°C
36 x 90 x 67mm
66.21mm
36mm
RS Stock No.: 223-7788Brand: RS PRO
€ 253.44
€ 253.44 Each (Exc. VAT)
Check stock
1
RS Pro
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Phase, Voltage
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3
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SPDT
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Overvoltage Protection, Undervoltage Protection
DIN Rail
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Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
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Screw
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65Hz
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-10 → +60°C
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45Hz
+60°C
-10°C
36 x 90 x 67mm
66.21mm
36mm
RS Stock No.: 223-7791Brand: RS PRO
€ 242.21
€ 242.21 Each (Exc. VAT)
Check stock
1
RS Pro
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Phase
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3
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SPDT
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Overvoltage Protection, Undervoltage Protection
DIN Rail
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Screw
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-20 → +60°C
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+60°C
-20°C
17.5 x 90 x 66.5mm
66.5mm
90mm
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