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 1257 products

Filter

Sort

Filter

Sort

BD 14.512

BD 14.512 Each (Exc. Vat)

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

BD 13.455

BD 13.455 Each (Exc. Vat)

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

BD 6.451

BD 6.451 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.132-172BrandRS PRO

BD 8.776

BD 8.776 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.132-173BrandRS PRO

BD 10.988

BD 10.988 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.122-216BrandRS PRO

BD 8.837

BD 8.837 Each (Exc. Vat)

Add to basket
RS Pro
Phase
-
-
Three
-
-
-
380V ac
-
-
-
-
DIN Rail
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
RS PRO Voltage Monitoring Relay, Single Phase, 220V ac, DIN Rail
RS Stock No.122-210BrandRS PRO

BD 10.087

BD 10.087 Each (Exc. Vat)

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

BD 13.474

BD 13.474 Each (Exc. Vat)

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

BD 11.852

BD 11.852 Each (Exc. Vat)

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

BD 38.029

BD 38.029 Each (Exc. Vat)

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

BD 41.485

BD 41.485 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
66.5mm
17.5 x 66.5 x 89mm
1
+60°C
-
-20°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
-
Screw
-
17.5mm
-
-
-
-
-
+60°C
89mm
RS PRO Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail
RS Stock No.223-7792BrandRS PRO

BD 59.869

BD 59.869 Each (Exc. Vat)

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

BD 68.508

BD 68.508 Each (Exc. Vat)

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

BD 39.621

BD 39.621 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
66.5mm
17.5 x 66.5 x 89mm
1
+60°C
-
-20°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
-
Screw
-
17.5mm
-
280V
-
-
-
+60°C
89mm
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.223-7790BrandRS PRO

BD 84.058

BD 84.058 Each (Exc. Vat)

Add to basket
RS Pro
Voltage
-
-
3
-
DPDT
-
-
-
Overvoltage Protection, Undervoltage Protection
-
-
DIN Rail
-
-
-
-
-
2 → 999s
-
-
-
-
66.21mm
36 x 90 x 67mm
-
-10 → +60°C
-
-10°C
-
-
Screw
-
36mm
-
-
-
-
-
+60°C
90mm
RS PRO Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
RS Stock No.223-7789BrandRS PRO

BD 78.508

BD 78.508 Each (Exc. Vat)

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

BD 72.958

BD 72.958 Each (Exc. Vat)

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

BD 69.726

BD 69.726 Each (Exc. Vat)

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

BD 73.032

BD 73.032 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
66.5mm
17.5 x 66.5 x 89mm
1
+60°C
-
-20°C
-
-
Screw
-
17.5mm
-
500V
-
-
-
+60°C
89mm
RS PRO Current Monitoring Relay, 1 Phase, SPDT, DIN Rail
RS Stock No.102-6134BrandRS PRO

BD 73.032

BD 73.032 Each (Exc. Vat)

Add to basket
RS Pro
Current
-
-
1
-
SPDT
-
-
-
-
-
-
DIN Rail
1A
10A
-
Overcurrent, Undercurrent
-
0.1 → 30s
48 → 63Hz
-
-
L
66.5mm
66.5 x 17.5 x 89mm
1
+60°C
-
-20°C
Green LED Indication for Supply Status
1 → 10A
Screw
-
17.5mm
-
-
-
-
-
+60°C
89mm

...