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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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4163405

RoHS

Each
1+
US$65.848
5+
US$63.221
10+
US$61.975
20+
US$60.782
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
240VAC
-
1 Phase, 3 Phase
5VA
-
240VAC
-
4163396

RoHS

Each
1+
US$90.611
5+
US$86.979
10+
US$85.278
20+
US$83.643
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
4163404

RoHS

Each
1+
US$65.848
5+
US$63.221
10+
US$61.975
20+
US$60.782
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
240VAC
-
3 Phase
5VA
-
240VAC
-
4163406

RoHS

Each
1+
US$65.848
5+
US$63.221
10+
US$61.975
20+
US$60.782
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163397

RoHS

Each
1+
US$97.137
5+
US$93.251
10+
US$91.415
20+
US$89.673
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
240VAC
300V
-
3 Phase
5VA
85V
300V
-
4163408

RoHS

Each
1+
US$74.651
5+
US$71.663
10+
US$70.256
20+
US$68.903
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163407

RoHS

Each
1+
US$70.511
5+
US$67.683
10+
US$66.343
20+
US$65.070
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
2056305

RoHS

Each
1+
US$315.490
Min: 1 / Mult: 1
Harmony RM35 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
194VAC
528VAC
-
2056304

RoHS

Each
1+
US$131.802
5+
US$129.163
10+
US$126.536
Min: 1 / Mult: 1
Harmony RM17 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
440VAC
-
3 Phase
22VA
183V
484V
-
9515399

RoHS

Each
1+
US$168.987
Min: 1 / Mult: 1
-
DPDT
-
DIN Rail
-
Screw
230VAC
500VAC
-
3 Phase
-
-
-
-
3111268

RoHS

Each
1+
US$80.253
5+
US$78.645
10+
US$77.037
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
15VA
183V
528VAC
-
2780443

RoHS

Each
1+
US$297.359
Min: 1 / Mult: 1
Harmony RM35UB3 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
277VAC
-
3 Phase
3.9VA
114VAC
329VAC
EN, IEC
9514430

RoHS

Each
1+
US$854.572
Min: 1 / Mult: 1
BD 9080 Series
DPDT
-
DIN Rail
-
Screw
230VAC
400VAC
-
3 Phase
2.4VA
-
-
-
2780440

RoHS

Each
1+
US$218.862
Min: 1 / Mult: 1
Harmony RM22UA Series
DPDT
8A
DIN Rail
-
Screw
250VAC
240VAC
-
1 Phase
1.5W
15V
500VAC
EN, IEC
3111267

RoHS

Each
1+
US$141.558
5+
US$138.730
10+
US$135.889
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
-
Screw
250VAC
576VAC
-
3 Phase
15VA
380VAC
480VAC
-
3111269

RoHS

Each
1+
US$169.952
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
-
Screw
250VAC
240VAC
-
3 Phase
10VA
200VAC
240VAC
-
2780442

RoHS

Each
1+
US$204.819
Min: 1 / Mult: 1
Harmony RM22UB Series
DPDT
8A
DIN Rail
-
Screw
250VAC
240VAC
-
1 Phase
2W
80V
300V
EN, IEC
3214139

RoHS

Each
1+
US$274.995
Min: 1 / Mult: 1
EMR6 Series
DPDT
4A
DIN Rail
-
Screw
250VAC
500VAC
-
3 Phase
18VA
300VAC
500VAC
-
3050817

RoHS

Each
1+
US$122.891
5+
US$119.180
10+
US$116.768
Min: 1 / Mult: 1
70 Series
DPDT
8A
DIN Rail, Panel
-
Screw
400VAC
480VAC
-
3 Phase
800mW
170VAC
520VAC
-
2835320

RoHS

Each
1+
US$186.448
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
15VA
380VAC
480VAC
CE, CSA, EN, IEC, UL
3111270

RoHS

Each
1+
US$144.492
Min: 1 / Mult: 1
Harmony RM22 Series
DPDT
8A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
15VA
380VAC
480VAC
-
3214136

RoHS

Each
1+
US$291.879
Min: 1 / Mult: 1
EMR6 Series
DPDT
4A
DIN Rail
-
Screw
250VAC
280VAC
-
3 Phase
3VA
180VAC
280VAC
-
3214134

RoHS

Each
1+
US$279.055
Min: 1 / Mult: 1
EMR6 Series
DPDT
4A
DIN Rail
-
Screw
250VAC
500VAC
-
3 Phase
3VA
300VAC
500VAC
-
2780439

RoHS

Each
1+
US$202.621
Min: 1 / Mult: 1
Harmony RM22UA Series
DPDT
8A
DIN Rail
-
Screw
250VAC
240VAC
-
1 Phase
1.5W
1V
100V
EN, IEC
3223356

RoHS

Each
1+
US$223.016
Min: 1 / Mult: 1
CM Series
DPDT
4A
DIN Rail
-
Screwless
230VAC
500VAC
-
3 Phase
-
300VAC
500VAC
-
1-25 of 59 items
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