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...

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RS Pro
Phase
3
SPDT
Phase Loss, Voltage Assemmetry
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
66.5mm
-
-
-20 → +60°C
-
-20°C
Screw
90mm
+60°C
-
-
-
-
-
-
-
17.5 x 90 x 66.5mm
-
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 223-7789Brand: RS PRO

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

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RS Pro
Voltage
3
DPDT
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
66.21mm
-
-
-10 → +60°C
90mm
-10°C
Screw
36mm
+60°C
-
-
-
-
-
-
-
36 x 90 x 67mm
-
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 223-7788Brand: RS PRO

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RS Pro
Phase, Voltage
3
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
-
-
-
-
66.21mm
-
-
-10 → +60°C
-
-10°C
Screw
36mm
+60°C
-
-
65Hz
-
-
45Hz
-
36 x 90 x 67mm
-
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 223-7791Brand: RS PRO

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RS Pro
Phase
3
SPDT
-
-
Overvoltage Protection, Undervoltage Protection
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
66.5mm
-
-
-20 → +60°C
-
-20°C
Screw
90mm
+60°C
-
-
-
-
-
-
-
17.5 x 90 x 66.5mm
-

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RS Pro
Phase, Voltage
3
DPDT
243 → 540 V
-
Undervoltage
-
DIN Rail, Surface Mount
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
-
-
-
-
89mm
-
Microprocessor Based, Detects Incorrect Phase Sequence, Phase Loss And Neutral Loss, Adjustment For Under Voltage Trip Level, Adjustment For Time Delay
-20 → +60°C
66.5mm
-20°C
Screw
17.5mm
+60°C
-
540V
-
-
243 V
-
-
89 x 17.5 x 66.5mm
-
RS PRO Phase Monitoring Relay, 3 Phase, DIN Rail, Surface Mount
RS Stock No.: 225-7384Brand: RS PRO

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RS Pro
Phase
3
-
-
-
-
-
DIN Rail, Surface Mount
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
66.5mm
-
3 LEDs for Phase presence status, Sequence Status,
-20 → +60°C
-
-20°C
Screw
17.5mm
+60°C
-
-
-
-
-
-
-
-
-
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 225-7387Brand: RS PRO

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RS Pro
Phase, Voltage
3
DPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
-
-
-
-
-
-
Screw
17.5mm
-
-
-
-
-
-
-
-
-
-
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 225-7386Brand: RS PRO

P.O.A.

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RS Pro
Voltage
3
DPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Screw
17.5mm
-
-
-
-
-
-
-
-
-
-

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RS Pro
Voltage
1
SPDT
12 → 24V dc
-
Undervoltage
-
DIN Rail
-
-
-
-
-
0 → 30s
-
-
-
L
66.5mm
-
-
+60°C
89mm
-20°C
Screw
17.5mm
+60°C
-
24V dc
-
-
12V dc
-
1
17.5 x 66.5 x 89mm
-
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 102-6136Brand: RS PRO

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RS Pro
Phase, Voltage
3
SPDT
-
-
Undervoltage
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
66.5mm
-
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
+60°C
89mm
-20°C
Screw
17.5mm
+60°C
-
-
-
-
-
-
1
17.5 x 66.5 x 89mm
-

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RS Pro
Phase, Voltage
3
SPDT
Maximum of 280 V
-
Undervoltage
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
66.5mm
-
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
+60°C
89mm
-20°C
Screw
17.5mm
+60°C
-
280V
-
-
-
-
1
17.5 x 66.5 x 89mm
-

P.O.A.

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RS Pro
Voltage
1
SPDT
Maximum of 500 V
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
0.1 → 30s
48 → 63Hz
-
-
L
66.5mm
-
-
+60°C
89mm
-20°C
Screw
17.5mm
+60°C
-
500V
-
-
-
-
1
17.5 x 66.5 x 89mm
-
RS PRO Current Monitoring Relay, 1 Phase, SPDT, DIN Rail
RS Stock No.: 102-6134Brand: RS PRO

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RS Pro
Current
1
SPDT
-
-
-
-
DIN Rail
1A
10A
-
Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
-
-
L
66.5mm
-
Green LED Indication for Supply Status
+60°C
89mm
-20°C
Screw
17.5mm
+60°C
-
-
-
-
-
-
1
66.5 x 17.5 x 89mm
1 → 10A
RS PRO Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 102-6137Brand: RS PRO

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RS Pro
Phase, Voltage
3
SPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
66.5mm
-
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
+60°C
89mm
-20°C
Screw
17.5mm
+60°C
-
-
-
-
-
-
1
17.5 x 66.5 x 89mm
-
RS PRO Voltage Monitoring Relay, 1 Phase, SPDT, DIN Rail
RS Stock No.: 102-6131Brand: RS PRO

P.O.A.

Add to basket
RS Pro
Voltage
1
SPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
0.2 → 10s
48 → 63Hz
-
-
L
66.5mm
-
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
+60°C
89mm
-20°C
Screw
17.5mm
+60°C
-
-
48Hz
-
-
63Hz
1
17.5 x 66.5 x 89mm
-
ATC Frequency, Phase, Voltage Monitoring Relay, 2 Phase, SPDT, 300 → 600V ac, DIN Rail
RS Stock No.: 286-817Brand: ATCManufacturers Part No.: DPR350C

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ATC
Frequency, Phase, Voltage
2
SPDT
300 → 600V ac
-
Frequency, Overvoltage, Phase Asymmetry, Phase Failure, Phase Sequence, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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-
-
-
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ATC Phase, Voltage Monitoring Relay, 3 Phase, SPDT
RS Stock No.: 286-818Brand: ATCManufacturers Part No.: SLU0200

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ATC
Phase, Voltage
3
SPDT
-
-
Phase Sequence
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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-
-
-
-
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-
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ATC Phase, Voltage Monitoring Relay, 3 Phase, SPDT, 236 → 290V ac, DIN Rail
RS Stock No.: 286-815Brand: ATCManufacturers Part No.: DPR175A

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ATC
Phase, Voltage
3
SPDT
236 → 290V ac
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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-
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-
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ATC Phase, Voltage Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 286-820Brand: ATCManufacturers Part No.: SLU0201

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Add to basket
ATC
Phase, Voltage
3
SPDT
-
-
Overvoltage, Undervoltage
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
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