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 1156 products
SR 806.12
SR 806.12 Each (ex VAT)
Check stock
1
RS Pro
Phase
3
Phase Loss, Voltage Assemmetry
SPDT
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
90mm
-
-
-
-
-
-
17.5 x 90 x 66.5mm
-
-
66.5mm
-20°C
-20 → +60°C
Screw
-
+60°C
-
SR 925.22
SR 925.22 Each (ex VAT)
Check stock
1
RS Pro
Voltage
3
-
DPDT
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
36mm
-
-
-
-
-
-
36 x 90 x 67mm
-
-
66.21mm
-10°C
-10 → +60°C
Screw
-
+60°C
-
SR 990.79
SR 990.79 Each (ex VAT)
Check stock
1
RS Pro
Voltage
3
-
DPDT
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
2 → 999s
-
-
-
-
-
36mm
-
-
-
-
-
-
36 x 90 x 67mm
-
90mm
66.21mm
-10°C
-10 → +60°C
Screw
-
+60°C
-
SR 859.94
SR 859.94 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
3
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
Phase Loss, Phase Sequence, Phase Asymmetry
2 → 999s
-
-
-
-
-
36mm
-
-
-
65Hz
-
-
36 x 90 x 67mm
45Hz
-
66.21mm
-10°C
-10 → +60°C
Screw
-
+60°C
-
SR 820.56
SR 820.56 Each (ex VAT)
Check stock
1
RS Pro
Phase
3
-
SPDT
-
Overvoltage Protection, Undervoltage Protection
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
90mm
-
-
-
-
-
-
17.5 x 90 x 66.5mm
-
-
66.5mm
-20°C
-20 → +60°C
Screw
-
+60°C
-
SR 833.81
SR 833.81 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
3
243 → 540 V
DPDT
-
Undervoltage
DIN Rail, Surface Mount
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
-
-
-
-
-
17.5mm
-
243 V
540V
-
-
-
89 x 17.5 x 66.5mm
-
66.5mm
89mm
-20°C
-20 → +60°C
Screw
Microprocessor Based, Detects Incorrect Phase Sequence, Phase Loss And Neutral Loss, Adjustment For Under Voltage Trip Level, Adjustment For Time Delay
+60°C
-
SR 422.72
SR 422.72 Each (ex VAT)
Check stock
1
RS Pro
Phase
3
-
-
-
-
DIN Rail, Surface Mount
-
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
-
17.5mm
-
-
-
-
-
-
-
-
-
66.5mm
-20°C
-20 → +60°C
Screw
3 LEDs for Phase presence status, Sequence Status,
+60°C
-
SR 840.97
SR 840.97 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
3
-
DPDT
-
Overvoltage, Undervoltage
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
-
-
-
-
-
-
17.5mm
-
-
-
-
-
-
-
-
-
-
-
-
Screw
-
-
-
SR 756.58
SR 756.58 Each (ex VAT)
Check stock
1
SR 448.21
SR 448.21 Each (ex VAT)
Check stock
1
RS Pro
Voltage
1
12 → 24V dc
SPDT
-
Undervoltage
DIN Rail
-
-
-
-
-
-
0 → 30s
-
-
-
L
-
17.5mm
-
12V dc
24V dc
-
-
1
17.5 x 66.5 x 89mm
-
89mm
66.5mm
-20°C
+60°C
Screw
-
+60°C
-
SR 488.85
SR 488.85 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
3
-
SPDT
-
Undervoltage
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
17.5mm
-
-
-
-
-
1
17.5 x 66.5 x 89mm
-
89mm
66.5mm
-20°C
+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
+60°C
-
SR 467.10
SR 467.10 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
3
Maximum of 280 V
SPDT
-
Undervoltage
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
-
17.5mm
-
-
280V
-
-
1
17.5 x 66.5 x 89mm
-
89mm
66.5mm
-20°C
+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
+60°C
-
SR 858.54
SR 858.54 Each (ex VAT)
Check stock
1
RS Pro
Voltage
1
Maximum of 500 V
SPDT
-
Overvoltage, Undervoltage
DIN Rail
-
-
-
-
-
-
0.1 → 30s
48 → 63Hz
-
-
L
-
17.5mm
-
-
500V
-
-
1
17.5 x 66.5 x 89mm
-
89mm
66.5mm
-20°C
+60°C
Screw
-
+60°C
-
SR 858.54
SR 858.54 Each (ex VAT)
Check stock
1
RS Pro
Current
1
-
SPDT
-
-
DIN Rail
-
1A
-
10A
Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
-
-
L
-
17.5mm
-
-
-
-
-
1
66.5 x 17.5 x 89mm
-
89mm
66.5mm
-20°C
+60°C
Screw
Green LED Indication for Supply Status
+60°C
1 → 10A
SR 630.95
SR 630.95 Each (ex VAT)
Check stock
1
RS Pro
Phase, Voltage
3
-
SPDT
-
Overvoltage, Undervoltage
DIN Rail
-
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
-
17.5mm
-
-
-
-
-
1
17.5 x 66.5 x 89mm
-
89mm
66.5mm
-20°C
+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
+60°C
-
SR 486.92
SR 486.92 Each (ex VAT)
Check stock
1
RS Pro
Voltage
1
-
SPDT
-
Overvoltage, Undervoltage
DIN Rail
-
-
-
-
-
-
0.2 → 10s
48 → 63Hz
-
-
L
-
17.5mm
-
-
-
48Hz
-
1
17.5 x 66.5 x 89mm
63Hz
89mm
66.5mm
-20°C
+60°C
Screw
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
-
SR 888.44
SR 888.44 Each (ex VAT)
Check stock
1
SR 928.20
SR 928.20 Each (ex VAT)
Check stock
1
SR 1,278.93
SR 1,278.93 Each (ex VAT)
Check stock
1
SR 1,774.00
SR 1,774.00 Each (ex VAT)
Check stock
1
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