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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
4163403

RoHS

Each
1+
€45.400
5+
€43.580
10+
€42.720
20+
€41.910
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
15VA
-
415VAC
-
4163402

RoHS

Each
1+
€42.910
5+
€41.190
10+
€40.380
20+
€39.610
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
15VA
-
415VAC
-
4163398

RoHS

Each
1+
€67.520
5+
€64.820
10+
€63.550
20+
€62.320
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
16VA
208VAC
480VAC
-
4163395

RoHS

Each
1+
€70.590
5+
€67.770
10+
€66.440
20+
€65.160
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
4259624
Each
1+
€217.330
Min: 1 / Mult: 1
-
SPDT
10A
Socket
-
Plug In
240VAC
-
-
3 Phase
90VA
200VAC
430VAC
-
1344233

RoHS

Each
1+
€69.730
5+
€68.340
10+
€66.940
Min: 1 / Mult: 1
70 Series
SPDT
6A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
1W
208VAC
480VAC
-
1895998

RoHS

Each
1+
€105.000
5+
€102.900
10+
€100.800
Min: 1 / Mult: 1
CM-PFE
SPDT
4A
DIN Rail
-
Screw
250VAC
440VAC
-
3 Phase
15VA
208VAC
440VAC
UL
2507225

RoHS

Each
1+
€73.050
5+
€71.590
10+
€70.130
Min: 1 / Mult: 1
K8DS
SPDT
5A
DIN Rail
-
Screw
-
480VAC
-
3 Phase
-
-
-
-
2455513

RoHS

Each
1+
€87.400
5+
€85.650
10+
€83.900
Min: 1 / Mult: 1
Zelio
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
-
-
-
2507215

RoHS

Each
1+
€167.800
Min: 1 / Mult: 1
K8AK
SPDT
5A
DIN Rail
-
Screw
-
480VAC
-
3 Phase
-
-
-
-
4163401

RoHS

Each
1+
€56.230
5+
€48.580
10+
€47.640
20+
€46.720
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3VA
208VAC
480VAC
-
4163399

RoHS

Each
1+
€51.000
5+
€44.060
10+
€43.200
20+
€42.360
Min: 1 / Mult: 1
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3.5VA
208VAC
480VAC
-
4377819

RoHS

Each
1+
€152.200
Min: 1 / Mult: 1
DPA51 Series
SPDT
5A
DIN Rail
-
Screw
24VDC
480VAC
-
3 Phase
13VA
177VAC
552VAC
-
4236649

RoHS

Each
1+
€136.200
5+
€132.480
10+
€129.770
Min: 1 / Mult: 1
MWS Series
SPDT
8A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
183V
528V
-
4300430

RoHS

Each
1+
€195.130
Min: 1 / Mult: 1
PPB01 Series
SPDT
8A
Socket
-
Plug In
250VAC
-
-
3 Phase
2.5VA
380VAC
480VAC
-
4300429

RoHS

Each
1+
€143.600
5+
€121.750
10+
€119.320
Min: 1 / Mult: 1
DPB51 Series
SPDT
5A
DIN Rail, Panel
-
Screw
250VAC
-
-
3 Phase
13VA
208VAC
480VAC
-
4259621
Each
1+
€148.440
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
230VAC
-
3 Phase
8VA
170VAC
290VAC
-
4259625
Each
1+
€199.790
Min: 1 / Mult: 1
-
SPDT
10A
Socket
-
Plug In
240VAC
-
-
3 Phase
90VA
200VAC
430VAC
-
2295793

RoHS

Each
1+
€118.760
5+
€116.380
10+
€114.010
Min: 1 / Mult: 1
70 Series
SPDT
10A
DIN Rail, Panel
-
Screw
250VAC
415VAC
-
3 Phase
11VA
380VAC
415VAC
-
2295791

RoHS

Each
1+
€100.520
5+
€98.510
10+
€96.500
Min: 1 / Mult: 1
70 Series
SPDT
10A
DIN Rail, Panel
-
Screw
250VAC
240VAC
-
1 Phase
2.6VA
220VAC
240VAC
-
2811545

RoHS

Each
1+
€39.590
5+
€39.250
10+
€38.450
Min: 1 / Mult: 1
SM 301 Series
SPDT
5A
DIN Rail
250V
Screw
250VAC
415VAC
28V
3 Phase
15VA
-
415VAC
CE
2102326

RoHS

Each
1+
€125.000
Min: 1 / Mult: 1
CM-PFS.S
SPDT
-
DIN Rail
-
Screw
24VDC
500VAC
-
3 Phase
-
200VAC
500VAC
UL
2612120

RoHS

Each
1+
€68.370
Min: 1 / Mult: 1
K8DS-PH
SPDT
5A
DIN Rail
-
Screw
1.25kV
250VAC
-
3 Phase
150W
-
-
UL
1895999

RoHS

Each
1+
€95.500
5+
€93.590
10+
€91.680
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
300VAC
460VAC
-
3 Phase
-
185VAC
460VAC
UL
2507217

RoHS

Each
1+
€165.240
Min: 1 / Mult: 1
K8AK
SPDT
5A
DIN Rail
-
Screw
-
480VAC
-
3 Phase
-
-
-
-
1-25 of 52 items
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