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Phase Monitoring Relays :

188 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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Manufacturer / Description
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Price For
Price (inc VAT)
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Contact Configuration
Contact Current
Relay Mounting
Contact Voltage VAC
Relay Terminals
Switching Voltage Max
Supply Voltage Max
Contact Voltage VDC
Phase Type
Power Consumption
Phase Monitoring Range Min
Phase Monitoring Range Max
Approvals & Standards
2780442

RoHS

Each
1+ €129.630(€159.4449)
Harmony RM22UB Series
DPDT
8A
DIN Rail
-
Screw
250VAC
240VAC
-
1 Phase
2W
80V
300V
EN, IEC
4163398

RoHS

Each
1+ €69.660(€85.6818)
5+ €68.200(€83.886)
10+ €66.730(€82.0779)
20+ €63.990(€78.7077)
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
16VA
208VAC
480VAC
-
4163401

RoHS

Each
1+ €50.460(€62.0658)
5+ €49.400(€60.762)
10+ €48.340(€59.4582)
20+ €46.370(€57.0351)
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3VA
208VAC
480VAC
-
4163396

RoHS

Each
1+ €83.010(€102.1023)
5+ €81.270(€99.9621)
10+ €79.530(€97.8219)
20+ €76.250(€93.7875)
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
4163407

RoHS

Each
1+ €64.590(€79.4457)
5+ €63.240(€77.7852)
10+ €61.880(€76.1124)
20+ €59.330(€72.9759)
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163399

RoHS

Each
1+ €47.350(€58.2405)
5+ €46.360(€57.0228)
10+ €45.370(€55.8051)
20+ €43.500(€53.505)
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
3.5VA
208VAC
480VAC
-
4163408

RoHS

Each
1+ €68.390(€84.1197)
5+ €66.960(€82.3608)
10+ €65.520(€80.5896)
20+ €62.820(€77.2686)
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163397

RoHS

Each
1+ €108.860(€133.8978)
5+ €103.280(€127.0344)
10+ €100.710(€123.8733)
20+ €98.250(€120.8475)
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
240VAC
300V
-
3 Phase
5VA
85V
300V
-
4163403

RoHS

Each
1+ €47.630(€58.5849)
5+ €46.640(€57.3672)
10+ €45.640(€56.1372)
20+ €43.760(€53.8248)
MP Voltage Monitoring Relays
SPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
15VA
-
415VAC
-
4163406

RoHS

Each
1+ €60.340(€74.2182)
5+ €59.070(€72.6561)
10+ €57.810(€71.1063)
20+ €55.420(€68.1666)
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
250VAC
415VAC
-
3 Phase
10VA
-
415VAC
-
4163405

RoHS

Each
1+ €60.340(€74.2182)
5+ €59.070(€72.6561)
10+ €57.810(€71.1063)
20+ €55.420(€68.1666)
MP Voltage Monitoring Relays
DPDT
5A
DIN Rail
-
Screw
250VAC
240VAC
-
1 Phase, 3 Phase
5VA
-
240VAC
-
4259621
Each
1+ €119.530(€147.0219)
-
SPDT
5A
DIN Rail
-
Screw
250VAC
230VAC
-
3 Phase
8VA
170VAC
290VAC
-
4259624
Each
1+ €175.020(€215.2746)
SLU Series
SPDT
10A
Socket
-
Plug In
240VAC
-
-
3 Phase
90VA
200VAC
430VAC
-
9515399

RoHS

Each
1+ €147.750(€181.7325)
-
DPDT
-
DIN Rail
-
Screw
230VAC
500VAC
-
3 Phase
-
-
-
-
1344233

RoHS

Each
1+ €69.600(€85.608)
5+ €68.210(€83.8983)
10+ €66.820(€82.1886)
70 Series
SPDT
6A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
1W
208VAC
480VAC
-
2295793

RoHS

Each
1+ €115.130(€141.6099)
5+ €112.830(€138.7809)
10+ €110.520(€135.9396)
70 Series
SPDT
10A
DIN Rail, Panel
-
Screw
250VAC
415VAC
-
3 Phase
11VA
380VAC
415VAC
-
2056305

RoHS

Each
1+ €210.140(€258.4722)
Harmony RM35 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
194VAC
528VAC
-
1895998

RoHS

Each
1+ €105.000(€129.150)
5+ €102.900(€126.567)
10+ €100.800(€123.984)
CM-PFE Series
SPDT
4A
DIN Rail
-
Screw
250VAC
440VAC
-
3 Phase
15VA
208VAC
440VAC
UL
2056304

RoHS

Each
1+ €95.990(€118.0677)
5+ €94.070(€115.7061)
10+ €92.150(€113.3445)
Harmony RM17 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
440VAC
-
3 Phase
22VA
183V
484V
-
2455513

RoHS

Each
1+ €90.600(€111.438)
5+ €88.790(€109.2117)
10+ €86.980(€106.9854)
Harmony RM17 Series
SPDT
5A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
22VA
-
-
-
2507225

RoHS

Each
1+ €75.300(€92.619)
5+ €73.790(€90.7617)
10+ €72.290(€88.9167)
K8DS Series
SPDT
5A
DIN Rail
-
Screw
-
480VAC
-
3 Phase
-
-
-
-
2780443

RoHS

Each
1+ €193.000(€237.390)
Harmony RM35UB3 Series
DPDT
5A
DIN Rail
-
Screw
250VAC
277VAC
-
3 Phase
3.9VA
114VAC
329VAC
EN, IEC
2835320

RoHS

Each
1+ €159.080(€195.6684)
Harmony RM22 Series
DPDT
8A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
15VA
380VAC
480VAC
CE, CSA, EN, IEC, UL
3111268

RoHS

Each
1+ €82.620(€101.6226)
5+ €80.970(€99.5931)
10+ €79.320(€97.5636)
Harmony RM22 Series
DPDT
8A
DIN Rail
-
Screw
250VAC
480VAC
-
3 Phase
15VA
183V
528VAC
-
2102326

RoHS

Each
1+ €125.000(€153.750)
CM Series
SPDT
-
DIN Rail
-
Screw
24V
500VAC
-
3 Phase
-
200VAC
500VAC
UL
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