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 1271 products

Filter

Sort

Filter

Sort

BD 24.422

BD 24.422 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Voltage
-
-
1
CO
-
150 → 300V ac
Overvoltage, Undervoltage
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
Screw
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-

BD 24.231

BD 24.231 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Voltage
-
-
1
CO
-
150 → 300V ac
Overvoltage, Undervoltage
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
Screw
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-

BD 17.768

BD 17.768 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Voltage
-
-
3
CO
-
-
Voltage Asymmetry
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
Screw
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-

BD 21.227

BD 21.227 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Voltage
-
-
3
CO
-
-
Voltage Asymmetry
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
Screw
-
-
-
-
-
-
-
-
-
-
CE, cULus, DEKRA, IEC, IQNet, ISO EN 9000
-
-
-
-
-
-

BD 14.285

BD 14.285 Each (Exc. Vat)

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

BD 13.207

BD 13.207 Each (Exc. Vat)

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

BD 6.387

BD 6.387 Each (Exc. Vat)

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

BD 8.626

BD 8.626 Each (Exc. Vat)

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

BD 8.568

BD 8.568 Each (Exc. Vat)

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

BD 10.801

BD 10.801 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Phase
-
-
Three
-
-
380V ac
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

BD 9.902

BD 9.902 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Voltage
-
-
Single
-
-
220V ac
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

BD 13.060

BD 13.060 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Voltage
-
-
Single
-
-
220V ac
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

BD 11.605

BD 11.605 Each (Exc. Vat)

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

BD 36.596

BD 36.596 Each (Exc. Vat)

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

BD 39.926

BD 39.926 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Phase, Voltage
-
-
3
SPDT
-
-
Undervoltage
-
-
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
0.2 → 10s
48 → 63Hz
-
-
L
Screw
-
-
-
-
-
17.5 x 66.5 x 89mm
-
1
-20°C
89mm
-
17.5mm
66.5mm
+60°C
+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
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.: 223-7792Brand: RS PRO

BD 57.618

BD 57.618 Each (Exc. Vat)

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

BD 65.931

BD 65.931 Each (Exc. Vat)

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

BD 38.134

BD 38.134 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Phase, Voltage
-
-
3
SPDT
-
Maximum of 280 V
Undervoltage
-
-
-
DIN Rail
-
-
-
-
Phase Failure, Phase Sequence
100ms
48 → 63Hz
-
-
L
Screw
-
-
-
-
280V
17.5 x 66.5 x 89mm
-
1
-20°C
89mm
-
17.5mm
66.5mm
+60°C
+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
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.: 223-7789Brand: RS PRO

BD 75.558

BD 75.558 Each (Exc. Vat)

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

BD 80.898

BD 80.898 Each (Exc. Vat)

Add to basket
RS Pro
-
-
Voltage
-
-
3
DPDT
-
-
Overvoltage Protection, Undervoltage Protection
-
-
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
Screw
-
-
-
-
-
36 x 90 x 67mm
-
-
-10°C
90mm
-
36mm
66.21mm
-10 → +60°C
+60°C
-
-

...