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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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2835320

RoHS

Each
1+
€ 155.000
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
15VA
380V
480V
CE, CSA, EN, IEC, UL
3111268

RoHS

Each
1+
€ 80.400
5+
€ 78.790
10+
€ 77.180
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
15VA
183VAC
528VAC
-
2780440

RoHS

Each
1+
€ 156.050
Min: 1 / Mult: 1
Harmony RM22UA Series
DPDT
8A
DIN Rail
Screw
250VAC
240V
1 Phase
1.5W
15V
500V
EN, IEC
3111269

RoHS

Each
1+
€ 148.500
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
Screw
250VAC
240V
3 Phase
10VA
200VAC
240VAC
-
3111267

RoHS

Each
1+
€ 146.000
5+
€ 143.080
10+
€ 140.160
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
Screw
250VAC
576VAC
3 Phase
15VA
380V
480V
-
2780442

RoHS

Each
1+
€ 147.460
Min: 1 / Mult: 1
Harmony RM22UB Series
DPDT
8A
DIN Rail
Screw
250VAC
240V
1 Phase
2W
80V
300V
EN, IEC
4236649

RoHS

Each
1+
€ 105.480
5+
€ 103.370
10+
€ 101.260
Min: 1 / Mult: 1
MWS Series
SPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
22VA
183VAC
528VAC
-
4300430

RoHS

Each
1+
€ 195.130
Min: 1 / Mult: 1
PPB01 Series
SPDT
8A
Socket
Plug In
250VAC
-
3 Phase
2.5VA
380V
480V
-
3050817

RoHS

Each
1+
€ 88.090
5+
€ 85.400
10+
€ 82.640
Min: 1 / Mult: 1
70 Series
DPDT
8A
DIN Rail, Panel
Screw
400VAC
480VAC
3 Phase
800mW
170VAC
520VAC
-
3111270

RoHS

Each
1+
€ 116.000
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
15VA
380V
480V
-
2780439

RoHS

Each
1+
€ 156.050
Min: 1 / Mult: 1
Harmony RM22UA Series
DPDT
8A
DIN Rail
Screw
250VAC
240V
1 Phase
1.5W
1V
100V
EN, IEC
2780438

RoHS

Each
1+
€ 177.210
Min: 1 / Mult: 1
Harmony RM22UA Series
DPDT
8A
DIN Rail
Screw
250VAC
240V
1 Phase
1.5W
50mV
5V
EN, IEC
2780441

RoHS

Each
1+
€ 162.480
Min: 1 / Mult: 1
Harmony RM22UA Series
DPDT
8A
DIN Rail
Screw
250VAC
415VAC
1 Phase
8VA
15V
500V
EN, IEC
3922060

RoHS

Each
1+
€ 152.010
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT-CO
8A
DIN Rail
Screw
250VAC
576VAC
3 Phase
4VA
208VAC
480V
-
2780437

RoHS

Each
1+
€ 111.000
5+
€ 108.780
10+
€ 106.560
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
Screw
250VAC
240V
3 Phase
10VA
200VAC
240VAC
EN, IEC
3111266

RoHS

Each
1+
€ 152.500
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
Screw
250VAC
288VAC
3 Phase
10VA
200VAC
240VAC
-
4698900
Each
1+
€ 158.100
Min: 1 / Mult: 1
200 Series
SPDT
8A
DIN Rail
Screw
250VAC
480VAC
3 Phase
2W
-
480V
-
4698901
Each
1+
€ 171.840
Min: 1 / Mult: 1
200 Series
SPDT
8A
DIN Rail
Screw
250VAC
575V
3 Phase
2W
-
575V
-
4698898
Each
1+
€ 155.810
Min: 1 / Mult: 1
200 Series
SPDT
8A
DIN Rail
Screw
250VAC
208V
3 Phase
2W
-
208V
-
4698899
Each
1+
€ 141.670
Min: 1 / Mult: 1
200 Series
SPDT
8A
DIN Rail
Screw
250VAC
240V
3 Phase
2W
-
240VAC
-
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