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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BD 15.138

BD 15.138 Each (Exc. Vat)

Add to basket
RS Pro
-
Current
-
-
-
Single
-
150 → 260V ac
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-
-
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-
DIN Rail
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-
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-

BD 14.051

BD 14.051 Each (Exc. Vat)

Add to basket
RS Pro
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Liquid Level
-
-
-
Single
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150 → 260V ac
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-
-
-
-
DIN Rail
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-
-
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-
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-
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BD 6.829

BD 6.829 Each (Exc. Vat)

Add to basket
RS Pro
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Phase
-
-
-
Three
-
150 → 260V ac
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-
-
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-
DIN Rail
-
-
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RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS Stock No.122-216BrandRS PRO

BD 9.379

BD 9.379 Each (Exc. Vat)

Add to basket
RS Pro
-
Phase
-
-
-
Three
-
380V ac
-
-
-
-
-
DIN Rail
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RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS Stock No.132-172BrandRS PRO

BD 9.315

BD 9.315 Each (Exc. Vat)

Add to basket
RS Pro
-
Phase
-
-
-
Three
-
380V ac
-
-
-
-
-
DIN Rail
-
-
-
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RS PRO Phase Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS Stock No.132-173BrandRS PRO

BD 11.661

BD 11.661 Each (Exc. Vat)

Add to basket
RS Pro
-
Phase
-
-
-
Three
-
380V ac
-
-
-
-
-
DIN Rail
-
-
-
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RS PRO Voltage Monitoring Relay, Single Phase, 220V ac, DIN Rail
RS Stock No.122-215BrandRS PRO

BD 14.292

BD 14.292 Each (Exc. Vat)

Add to basket
RS Pro
-
Voltage
-
-
-
Single
-
220V ac
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-
-
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-
DIN Rail
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RS PRO Voltage Monitoring Relay, Single Phase, 220V ac, DIN Rail
RS Stock No.122-210BrandRS PRO

BD 10.694

BD 10.694 Each (Exc. Vat)

Add to basket
RS Pro
-
Voltage
-
-
-
Single
-
220V ac
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-
-
-
-
DIN Rail
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-
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RS PRO Voltage Monitoring Relay, Three Phase, 380V ac, DIN Rail
RS Stock No.122-212BrandRS PRO

BD 12.576

BD 12.576 Each (Exc. Vat)

Add to basket
RS Pro
-
Voltage
-
-
-
Three
-
380V ac
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-
-
-
-
DIN Rail
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BD 40.348

BD 40.348 Each (Exc. Vat)

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

BD 44.016

BD 44.016 Each (Exc. Vat)

Add to basket
RS Pro
-
Phase, Voltage
-
-
-
3
SPDT
-
-
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Undervoltage
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-
DIN Rail
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-
-
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Phase Failure, Phase Sequence
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0.2 → 10s
48 → 63Hz
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-
-
-
-
-
-
L
-
-
Screw
+60°C
1
+60°C
-
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
89mm
17.5mm
17.5 x 66.5 x 89mm
66.5mm
-
-
-
-
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-
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.223-7792BrandRS PRO

BD 63.516

BD 63.516 Each (Exc. Vat)

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

BD 72.678

BD 72.678 Each (Exc. Vat)

Add to basket
RS Pro
-
Phase
-
-
-
3
SPDT
Phase Loss, Voltage Assemmetry
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-
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DIN Rail
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-
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Screw
-20 → +60°C
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+60°C
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90mm
17.5 x 90 x 66.5mm
66.5mm
-
-
-
-
-
-

BD 42.033

BD 42.033 Each (Exc. Vat)

Add to basket
RS Pro
-
Phase, Voltage
-
-
-
3
SPDT
Maximum of 280 V
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-
Undervoltage
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DIN Rail
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-
-
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Phase Failure, Phase Sequence
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100ms
48 → 63Hz
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-
-
-
-
-
-
L
-
-
Screw
+60°C
1
+60°C
-
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
89mm
17.5mm
17.5 x 66.5 x 89mm
66.5mm
280V
-
-
-
-
-
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.223-7789BrandRS PRO

BD 83.296

BD 83.296 Each (Exc. Vat)

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

BD 89.184

BD 89.184 Each (Exc. Vat)

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

BD 77.403

BD 77.403 Each (Exc. Vat)

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

BD 73.975

BD 73.975 Each (Exc. Vat)

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

BD 77.485

BD 77.485 Each (Exc. Vat)

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

BD 77.485

BD 77.485 Each (Exc. Vat)

Add to basket
RS Pro
-
Current
-
-
-
1
SPDT
-
-
-
-
-
-
DIN Rail
-
1A
-
10A
Overcurrent, Undercurrent
-
-
0.1 → 30s
48 → 63Hz
-
-
-
-
-
-
-
L
-
-
Screw
+60°C
1
+60°C
-
Green LED Indication for Supply Status
89mm
17.5mm
66.5 x 17.5 x 89mm
66.5mm
-
-
-
-
-
1 → 10A

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