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Phase Monitoring Relays:

139 Products Found

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
4163403

RoHS

Each
1+
CHF 42.680
5+
CHF 40.970
10+
CHF 40.160
20+
CHF 39.400
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
15VA
-
415VAC
-
4163405

RoHS

Each
1+
CHF 60.610
5+
CHF 52.370
10+
CHF 51.340
20+
CHF 50.350
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
250VAC
240VAC
-
1 Phase, 3 Phase
5VA
-
240VAC
-
4163396

RoHS

Each
1+
CHF 82.640
5+
CHF 71.400
10+
CHF 70.010
20+
CHF 68.660
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
4163397

RoHS

Each
1+
CHF 88.590
5+
CHF 76.540
10+
CHF 75.040
20+
CHF 73.610
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
240VAC
300V
-
3 Phase
5VA
85V
300V
-
4163408

RoHS

Each
1+
CHF 68.090
5+
CHF 58.830
10+
CHF 57.670
20+
CHF 56.570
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163404

RoHS

Each
1+
CHF 60.610
5+
CHF 52.370
10+
CHF 51.340
20+
CHF 50.350
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
250VAC
240VAC
-
3 Phase
5VA
-
240VAC
-
4163406

RoHS

Each
1+
CHF 60.610
5+
CHF 52.370
10+
CHF 51.340
20+
CHF 50.350
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163402

RoHS

Each
1+
CHF 40.340
5+
CHF 38.730
10+
CHF 37.960
20+
CHF 37.240
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
15VA
-
415VAC
-
4163398

RoHS

Each
1+
CHF 62.980
5+
CHF 60.460
10+
CHF 59.280
20+
CHF 58.130
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
16VA
208VAC
480VAC
-
4163395

RoHS

Each
1+
CHF 65.840
5+
CHF 63.210
10+
CHF 61.970
20+
CHF 60.780
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
4163407

RoHS

Each
1+
CHF 57.880
5+
CHF 55.550
10+
CHF 54.470
20+
CHF 53.420
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163399

RoHS

Each
1+
CHF 47.570
5+
CHF 41.100
10+
CHF 40.300
20+
CHF 39.510
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3.5VA
208VAC
480VAC
-
4163401

RoHS

Each
1+
CHF 52.870
5+
CHF 45.670
10+
CHF 44.790
20+
CHF 43.920
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3VA
208VAC
480VAC
-
4300429

RoHS

Each
1+
CHF 135.220
5+
CHF 114.650
10+
CHF 112.360
Min: 1 / Mult: 1
DPB51 Series
SPDT
5A
DIN Rail, Panel
-
Screw
250VAC
-
-
3 Phase
13VA
208VAC
480VAC
-
4236649

RoHS

Each
1+
CHF 90.940
5+
CHF 86.390
10+
CHF 81.840
Min: 1 / Mult: 1
MWS Series
SPDT
8A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
183V
528V
-
4300430

RoHS

Each
1+
CHF 185.290
Min: 1 / Mult: 1
PPB01 Series
SPDT
8A
Socket
-
Plug In
250VAC
-
-
3 Phase
2.5VA
380VAC
480VAC
-
4377819

RoHS

Each
1+
CHF 144.530
Min: 1 / Mult: 1
DPA51 Series
SPDT
5A
DIN Rail
-
Screw
24VDC
480VAC
-
3 Phase
13VA
177VAC
552VAC
-
4259624
Each
1+
CHF 202.720
Min: 1 / Mult: 1
-
SPDT
10A
Socket
-
Plug In
240VAC
-
-
3 Phase
90VA
200VAC
430VAC
-
3484526

RoHS

Each
1+
CHF 140.000
Min: 1 / Mult: 1
SIRIUS 3UG4 Series
SPDT
60A
DIN Rail, Panel
-
Screw
690VAC
690V
-
3 Phase
5.8W
-
-
-
2295791

RoHS

Each
1+
CHF 94.510
5+
CHF 92.620
10+
CHF 90.730
Min: 1 / Mult: 1
70 Series
SPDT
10A
DIN Rail, Panel
-
Screw
250VAC
240VAC
-
1 Phase
2.6VA
220VAC
240VAC
-
3050817

RoHS

Each
1+
CHF 80.450
5+
CHF 77.990
10+
CHF 76.430
Min: 1 / Mult: 1
70 Series
DPDT
8A
DIN Rail, Panel
-
Screw
400VAC
480VAC
-
3 Phase
800mW
170VAC
520VAC
-
2811545

RoHS

Each
1+
CHF 44.250
5+
CHF 43.370
10+
CHF 42.490
Min: 1 / Mult: 1
SM 301 Series
SPDT
5A
DIN Rail
250V
Screw
250VAC
415VAC
28V
3 Phase
15VA
-
415VAC
CE
1896002

RoHS

Each
1+
CHF 82.080
5+
CHF 80.430
10+
CHF 78.800
Min: 1 / Mult: 1
CM-PBE
SPST-NO
-
DIN Rail
-
Screw
-
440VAC
-
3 Phase
-
220VAC
440VAC
UL
9515046

RoHS

Each
1+
CHF 97.200
5+
CHF 82.410
10+
CHF 80.760
Min: 1 / Mult: 1
IK 9179
SPST-NC
-
DIN Rail
-
Screw
230VAC
400VAC
-
3 Phase
-
-
-
-
1390500

RoHS

Each
1+
CHF 146.030
Min: 1 / Mult: 1
3UG
SPST-NC
-
DIN Rail
-
Screw
-
500VAC
-
3 Phase
2W
320VAC
500VAC
-
26-50 of 139 items
of 6 page(s)

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