ex VAT

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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Contact Current
Relay Mounting
Contact Voltage VAC
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Supply Voltage Max
Contact Voltage VDC
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Power Consumption
Phase Monitoring Range Min
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Approvals & Standards
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ComparePrice ForQuantity
2507225

RoHS

Each
1+
Kč1,649.010
5+
Kč1,616.155
10+
Kč1,583.050
Min: 1 / Mult: 1
K8DS Series
SPDT
5A
DIN Rail
-
Screw
-
480VAC
-
3 Phase
-
-
-
-
4163403

RoHS

Each
1+
Kč1,138.632
5+
Kč1,092.986
10+
Kč1,071.418
20+
Kč1,051.103
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
15VA
-
415VAC
-
4163405

RoHS

Each
1+
Kč1,429.811
5+
Kč1,372.628
10+
Kč1,345.542
20+
Kč1,319.710
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
240VAC
-
1 Phase, 3 Phase
5VA
-
240VAC
-
4163396

RoHS

Each
1+
Kč1,967.275
5+
Kč1,888.273
10+
Kč1,851.406
20+
Kč1,815.792
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
4163406

RoHS

Each
1+
Kč1,429.811
5+
Kč1,372.628
10+
Kč1,345.542
20+
Kč1,319.710
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163402

RoHS

Each
1+
Kč1,076.183
5+
Kč1,033.045
10+
Kč1,012.730
20+
Kč993.419
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
15VA
-
415VAC
-
4163398

RoHS

Each
1+
Kč1,622.425
5+
Kč1,557.217
10+
Kč1,526.870
20+
Kč1,497.276
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
16VA
208VAC
480VAC
-
4163397

RoHS

Each
1+
Kč2,108.977
5+
Kč2,024.458
10+
Kč1,984.831
20+
Kč1,946.710
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
240VAC
300V
-
3 Phase
5VA
85V
300V
-
4163408

RoHS

Each
1+
Kč1,620.670
5+
Kč1,555.963
10+
Kč1,525.366
20+
Kč1,496.022
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163395

RoHS

Each
1+
Kč1,696.160
5+
Kč1,628.194
10+
Kč1,596.342
20+
Kč1,565.494
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
4163407

RoHS

Each
1+
Kč1,543.925
5+
Kč1,481.977
10+
Kč1,453.135
20+
Kč1,425.046
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163399

RoHS

Each
1+
Kč1,122.079
5+
Kč1,077.186
10+
Kč1,056.119
20+
Kč1,035.804
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3.5VA
208VAC
480VAC
-
4163401

RoHS

Each
1+
Kč1,258.514
5+
Kč1,208.104
10+
Kč1,184.278
20+
Kč1,161.455
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3VA
208VAC
480VAC
-
2056305

RoHS

Each
1+
Kč4,990.920
Min: 1 / Mult: 1
Harmony RM35 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
194VAC
528VAC
-
2056304

RoHS

Each
1+
Kč2,259.708
5+
Kč2,214.564
10+
Kč2,169.420
Min: 1 / Mult: 1
Harmony RM17 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
440VAC
-
3 Phase
22VA
183V
484V
-
2507215

RoHS

Each
1+
Kč4,208.424
Min: 1 / Mult: 1
K8AK Series
SPDT
5A
DIN Rail
-
Screw
-
480VAC
-
3 Phase
-
-
-
-
2780443

RoHS

Each
1+
Kč4,840.440
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+
Kč2,072.110
5+
Kč2,034.991
10+
Kč1,999.378
Min: 1 / Mult: 1
K8AK Series
DPDT-NC
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
-
200VAC
480VAC
CSA, UL
2455513

RoHS

Each
1+
Kč2,272.248
5+
Kč2,226.853
10+
Kč2,181.458
Min: 1 / Mult: 1
Harmony RM17 Series
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
-
-
-
4163404

RoHS

Each
1+
Kč1,429.811
5+
Kč1,372.628
10+
Kč1,345.542
20+
Kč1,319.710
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
-
Screw
250VAC
240VAC
-
3 Phase
5VA
-
240VAC
-
4377819

RoHS

Each
1+
Kč3,817.176
Min: 1 / Mult: 1
DPA51 Series
SPDT
5A
DIN Rail
-
Screw
24VDC
480VAC
-
3 Phase
13VA
177VAC
552VAC
-
4300429

RoHS

Each
1+
Kč3,621.050
5+
Kč3,070.043
10+
Kč3,008.597
Min: 1 / Mult: 1
DPB51 Series
SPDT
5A
DIN Rail, Panel
-
Screw
250VAC
-
-
3 Phase
13VA
208VAC
480VAC
-
4259621
Each
1+
Kč3,722.875
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
-
Screw
250VAC
230VAC
-
3 Phase
8VA
170VAC
290VAC
-
2811545

RoHS

Each
1+
Kč992.917
5+
Kč984.390
10+
Kč964.326
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
250V
Screw
250VAC
415VAC
28V
3 Phase
15VA
-
415VAC
CE
2612120

RoHS

Each
1+
Kč1,832.094
Min: 1 / Mult: 1
K8DS Series
SPDT
5A
DIN Rail
-
Screw
1.25kV
250VAC
-
3 Phase
150W
-
-
UL
1-25 of 71 items
of 3 page(s)

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