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Farnell offers phase monitoring relays that protect three-phase systems from phase loss, phase reversal and imbalance. These relays are designed to prevent motor damage and ensure stable operation.

Phase monitoring relays measure phase sequence, phase loss and voltage balance in three-phase systems. If any discrepancy is detected, the relay disconnects the load to prevent motor failure.

Key Features:

  • Phase loss and reversal protection for motors and equipment.
  • Adjustable voltage range for versatile use.
  • Compact design for easy installation in control panels.

Applications:

  • Industrial Motors – Ensure proper phase alignment and prevent damage.
  • HVAC Systems – Maintain stable operation in multi-phase compressors.
  • Renewable Energy – Monitor phase balance in solar and wind systems.
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ComparePrice ForQuantity
3111268

RoHS

Each
1+
kr 600.990
5+
kr 588.960
10+
kr 576.920
Min: 1 / Mult: 1
Zelio
DPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
15VA
183VAC
528VAC
-
2780440

RoHS

Each
1+
kr 1,156.770
Min: 1 / Mult: 1
Zelio RM22UA
DPDT
8A
DIN Rail
Screw
250VAC
240V
1 Phase
1.5W
15V
500V
EN, IEC
3111267

RoHS

Each
1+
kr 1,091.350
5+
kr 1,069.520
10+
kr 1,047.700
Min: 1 / Mult: 1
Zelio
DPDT
8A
DIN Rail
Screw
250VAC
576VAC
3 Phase
15VA
380VAC
480VAC
-
3111269

RoHS

Each
1+
kr 1,106.770
Min: 1 / Mult: 1
Zelio
DPDT
8A
DIN Rail
Screw
250VAC
240V
3 Phase
10VA
200VAC
240VAC
-
2780442

RoHS

Each
1+
kr 1,093.130
Min: 1 / Mult: 1
Zelio RM22UB
DPDT
8A
DIN Rail
Screw
250VAC
240V
1 Phase
2W
80V
300V
EN, IEC
3922060

RoHS

Each
1+
kr 1,131.000
Min: 1 / Mult: 1
-
DPDT-CO
8A
DIN Rail
Screw
250VAC
576VAC
3 Phase
4VA
208VAC
480VAC
-
4236649

RoHS

Each
1+
kr 858.760
5+
kr 841.570
10+
kr 824.390
Min: 1 / Mult: 1
MWS Series
SPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
22VA
183VAC
528VAC
-
4300430

RoHS

Each
1+
kr 1,451.180
Min: 1 / Mult: 1
PPB01 Series
SPDT
8A
Socket
Plug In
250VAC
-
3 Phase
2.5VA
380VAC
480VAC
-
3050817

RoHS

Each
1+
kr 695.660
5+
kr 681.750
10+
kr 667.840
Min: 1 / Mult: 1
70 Series
DPDT
8A
DIN Rail, Panel
Screw
400VAC
480VAC
3 Phase
800mW
170VAC
520VAC
-
2835320

RoHS

Each
1+
kr 1,155.210
Min: 1 / Mult: 1
Zelio RM22UA
DPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
15VA
380VAC
480VAC
CE, CSA, EN, IEC, UL
3111270

RoHS

Each
1+
kr 867.100
Min: 1 / Mult: 1
Zelio
DPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
15VA
380VAC
480VAC
-
2780439

RoHS

Each
1+
kr 1,161.000
Min: 1 / Mult: 1
Zelio RM22UA
DPDT
8A
DIN Rail
Screw
250VAC
240V
1 Phase
1.5W
1V
100V
EN, IEC
2780441

RoHS

Each
1+
kr 1,201.070
Min: 1 / Mult: 1
Zelio RM22UA
DPDT
8A
DIN Rail
Screw
250VAC
415VAC
1 Phase
8VA
15V
500V
EN, IEC
2780438

RoHS

Each
1+
kr 1,320.210
Min: 1 / Mult: 1
Zelio RM22UA
DPDT
8A
DIN Rail
Screw
250VAC
240V
1 Phase
1.5W
50mV
5V
EN, IEC
2780437

RoHS

Each
1+
kr 829.730
5+
kr 813.130
10+
kr 796.540
Min: 1 / Mult: 1
Zelio RM22TU
DPDT
8A
DIN Rail
Screw
250VAC
240V
3 Phase
10VA
200VAC
240VAC
EN, IEC
3111266

RoHS

Each
1+
kr 1,139.940
Min: 1 / Mult: 1
Zelio
DPDT
8A
DIN Rail
Screw
250VAC
288VAC
3 Phase
10VA
200VAC
240VAC
-
9419250
Each
1+
kr 675.400
5+
kr 618.310
10+
kr 570.790
Min: 1 / Mult: 1
-
SPDT
8A
DIN Rail
Screw
-
500VAC
3 Phase
4VA
180VAC
500V
-
2076503

RoHS

Each
1+
kr 374.050
5+
kr 358.900
10+
kr 344.900
Min: 1 / Mult: 1
-
SPDT
8A
DIN Rail
Screw
-
520VAC
3 Phase
8VA
77VAC
520VAC
-
4698899
Each
1+
kr 1,099.000
5+
kr 931.610
10+
kr 912.990
Min: 1 / Mult: 1
200 Series
SPDT
8A
DIN Rail
Screw
250VAC
240V
3 Phase
2W
-
240VAC
-
4698901
Each
1+
kr 1,285.000
Min: 1 / Mult: 1
200 Series
SPDT
8A
DIN Rail
Screw
250VAC
575V
3 Phase
2W
-
575V
-
4698900
Each
1+
kr 1,182.000
Min: 1 / Mult: 1
200 Series
SPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
2W
-
480VAC
-
4698898
Each
1+
kr 1,165.000
Min: 1 / Mult: 1
200 Series
SPDT
8A
DIN Rail
Screw
250VAC
208V
3 Phase
2W
-
208V
-
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