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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
2507225

RoHS

Each
1+
€ 65.750
5+
€ 64.440
10+
€ 63.120
Total:€ 65.75
Min: 1 / Mult: 1
K8DS Series
SPDT
5A
DIN Rail
-
Screw
-
480VAC
-
3 Phase
-
-
-
-
4163401

RoHS

Each
1+
€ 56.060
5+
€ 54.870
10+
€ 53.680
Total:€ 56.06
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3VA
208VAC
480VAC
-
4163403

RoHS

Each
1+
€ 50.290
5+
€ 49.220
10+
€ 48.150
Total:€ 50.29
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
15VA
-
415VAC
-
4163405

RoHS

Each
1+
€ 63.690
5+
€ 62.340
10+
€ 60.980
Total:€ 63.69
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
240VAC
-
1 Phase, 3 Phase
5VA
-
240VAC
-
4163396

RoHS

Each
1+
€ 87.640
5+
€ 85.780
10+
€ 83.900
Total:€ 87.64
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
4163406

RoHS

Each
1+
€ 63.690
5+
€ 62.340
10+
€ 60.980
Total:€ 63.69
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163402

RoHS

Each
1+
€ 47.540
5+
€ 46.530
10+
€ 45.520
Total:€ 47.54
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
15VA
-
415VAC
-
4163398

RoHS

Each
1+
€ 73.550
5+
€ 71.990
10+
€ 70.410
Total:€ 73.55
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
16VA
208VAC
480VAC
-
4163397

RoHS

Each
1+
€ 114.270
Total:€ 114.27
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
240VAC
300V
-
3 Phase
5VA
85V
300V
-
4163408

RoHS

Each
1+
€ 72.210
5+
€ 70.680
10+
€ 69.130
Total:€ 72.21
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163399

RoHS

Each
1+
€ 50.000
5+
€ 48.930
10+
€ 47.870
Total:€ 50.00
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3.5VA
208VAC
480VAC
-
4163395

RoHS

Each
1+
€ 76.900
5+
€ 75.270
10+
€ 73.630
Total:€ 76.90
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
4163407

RoHS

Each
1+
€ 68.200
5+
€ 66.750
10+
€ 65.290
Total:€ 68.20
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
2056305

RoHS

Each
1+
€ 199.000
Total:€ 199.00
Min: 1 / Mult: 1
Harmony RM35 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
194VAC
528VAC
-
2056304

RoHS

Each
1+
€ 90.100
5+
€ 88.300
10+
€ 86.500
Total:€ 90.10
Min: 1 / Mult: 1
Harmony RM17 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
440VAC
-
3 Phase
22VA
183V
484V
-
2507215

RoHS

Each
1+
€ 167.800
Total:€ 167.80
Min: 1 / Mult: 1
K8AK Series
SPDT
5A
DIN Rail
-
Screw
-
480VAC
-
3 Phase
-
-
-
-
2455513

RoHS

Each
1+
€ 90.600
5+
€ 88.790
10+
€ 86.980
Total:€ 90.60
Min: 1 / Mult: 1
Harmony RM17 Series
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
-
-
-
2780443

RoHS

Each
1+
€ 193.000
Total:€ 193.00
Min: 1 / Mult: 1
Harmony RM35UB3 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
277VAC
-
3 Phase
3.9VA
114VAC
329VAC
EN, IEC
2504231

RoHS

Each
1+
€ 86.250
5+
€ 84.530
10+
€ 82.800
Total:€ 86.25
Min: 1 / Mult: 1
K8AK Series
DPDT-NC
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
-
200VAC
480VAC
CSA, UL
2102318

RoHS

Each
1+
€ 254.000
Total:€ 254.00
Min: 1 / Mult: 1
CM Series
DPDT
5A
DIN Rail
-
Spring Clamp
300VAC
500VAC
-
3 Phase
18VA
300VAC
500VAC
UL
4163404

RoHS

Each
1+
€ 63.690
5+
€ 62.340
10+
€ 60.980
Total:€ 63.69
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
240VAC
-
3 Phase
5VA
-
240VAC
-
4835985

RoHS

Each
1+
€ 137.730
5+
€ 116.770
10+
€ 114.430
Total:€ 137.73
Min: 1 / Mult: 1
DPA52 Series
SPDT
5A
DIN Rail
-
-
250VAC
480VAC
-
3 Phase
2VA
208VAC
480VAC
-
4377819

RoHS

Each
1+
€ 147.090
Total:€ 147.09
Min: 1 / Mult: 1
DPA51 Series
SPDT
5A
DIN Rail
-
Screw
24VDC
480VAC
-
3 Phase
13VA
177VAC
552VAC
-
4259621
Each
1+
€ 156.450
Total:€ 156.45
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
230VAC
-
3 Phase
8VA
170VAC
290VAC
-
2811545

RoHS

Each
1+
€ 40.040
5+
€ 39.920
10+
€ 39.790
Total:€ 40.04
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
250V
Screw
250VAC
415VAC
28V
3 Phase
15VA
-
415VAC
CE
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