Newark 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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86K0442

RoHS

Each
1+
$219.620
Min: 1 / Mult: 1
MWU Series
SPDT
5A
DIN Rail
Screw
-
250V
480VAC
-
3 Phase
1.8VA
183VAC
528VAC
-
05M4097

RoHS

Each
1+
$229.920
5+
$219.220
10+
$212.800
25+
$206.380
Min: 1 / Mult: 1
DPA53 Series
SPDT
5A
DIN Rail
Screw
-
250V
480VAC
-
3 Phase
13VA
320VAC
480VAC
-
67C0900

RoHS

Each
1+
$146.320
5+
$139.500
10+
$135.420
25+
$131.330
Min: 1 / Mult: 1
DPA51 Series
SPDT
5A
DIN Rail
Screw
-
250V
480VAC
-
3 Phase
13VA
177VAC
550VAC
-
38Y7644

RoHS

Date/Lot Code

Each
1+
$138.520
5+
$132.190
10+
$129.020
25+
$115.750
50+
$106.900
More Pricing...
Min: 1 / Mult: 1
K8AK Series
DPDT-NC
5A
DIN Rail
Screw
-
250V
480VAC
-
3 Phase
4.1VA
200VAC
480VAC
-
72Y1070

RoHS

Each
1+
$123.490
5+
$118.100
10+
$115.390
25+
$102.950
50+
$95.320
More Pricing...
Min: 1 / Mult: 1
K8DS Series
SPDT
5A
DIN Rail
Screw
-
-
480VAC
-
3 Phase
-
-
-
-
45AC6247

RoHS

Each
1+
$206.040
5+
$196.450
10+
$190.700
25+
$184.940
Min: 1 / Mult: 1
DPA52 Series
SPDT
5A
DIN Rail
-
-
480VAC
208VAC
-
3 Phase
2VA
480VAC
208VAC
CE, CSA, UL
70Y5750

RoHS

Each
1+
$140.870
5+
$134.720
10+
$131.640
25+
$117.450
50+
$108.740
More Pricing...
Min: 1 / Mult: 1
K8AK Series
DPDT-NC
5A
DIN Rail
Screw
-
250V
480VAC
-
3 Phase
-
200VAC
480VAC
-
72Y1059

RoHS

Each
1+
$281.760
5+
$263.270
10+
$246.800
25+
$229.230
50+
$217.500
More Pricing...
Min: 1 / Mult: 1
K8AK Series
SPDT
5A
DIN Rail
Screw
-
-
480VAC
-
3 Phase
-
-
-
-
84X8729

RoHS

Date/Lot Code

Each
1+
$364.070
5+
$339.140
10+
$319.190
25+
$297.580
50+
$280.950
More Pricing...
Min: 1 / Mult: 1
K8AK Series
SPDT
5A
DIN Rail
Screw
-
250V
480VAC
-
3 Phase
4.4VA
380VAC
480VAC
-
05M4096

RoHS

Each
1+
$220.970
5+
$210.690
10+
$204.510
25+
$198.340
Min: 1 / Mult: 1
DPA53 Series
SPDT
5A
DIN Rail
Screw
-
250V
240VAC
-
3 Phase
7VA
160VAC
240VAC
-
41Y4153

RoHS

Each
1+
$421.660
5+
$392.780
10+
$369.690
25+
$344.650
50+
$325.400
More Pricing...
Min: 1 / Mult: 1
K8AK-AS Series
SPDT
5A
DIN Rail
Screw
-
250V
24V
-
1 Phase
-
-
-
-
15AJ5694

RoHS

Date/Lot Code

Each
1+
$1,276.790
5+
$1,140.850
10+
$995.380
25+
$918.430
50+
$827.990
Min: 1 / Mult: 1
PC1 Series
SPDT
5A
DIN Rail
Screw
-
250V
-
-
3 Phase
3VA
190VAC
600VAC
-
09P6672

RoHS

Date/Lot Code

Each
Pricing is unavailable. Please contact customer services.
Harmony RM35UB3 Series
DPDT
5A
DIN Rail
Screw
-
250V
480VAC
-
3 Phase
2.9VA
194V
528VAC
-
12AH0513
Each
1+
$340.980
5+
$325.600
10+
$316.370
25+
$307.140
Min: 1 / Mult: 1
DPC01 Series
2 x SPDT
5A
DIN Rail
Screw
-
24VDC
690VAC
-
3 Phase
-
177VAC
793VAC
-
66AH6827

RoHS

Each
1+
$230.370
Min: 1 / Mult: 1
Harmony RM17 Series
SPDT
5A
DIN Rail
Screw
-
250V
480VAC
-
3 Phase
22VA
-
-
-
27R0593
Each
1+
$352.790
5+
$336.870
10+
$327.320
25+
$317.770
Min: 1 / Mult: 1
DPC01 Series
2 x SPDT
5A
DIN Rail
Screw
-
24VDC
480VAC
-
3 Phase
-
374VAC
552VAC
-
67AH3181

RoHS

Each
1+
$242.190
10+
$229.740
25+
$209.430
Min: 1 / Mult: 1
Harmony RM17 Series
DPDT
5A
DIN Rail
Screw
-
250V
440VAC
-
3 Phase
22VA
183VAC
484V
-
69AK8666

RoHS

Each
1+
$67.560
100+
$67.560
250+
$67.560
500+
$67.560
1000+
$67.560
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
Screw
-
250V
415VAC
-
3 Phase
10VA
-
415VAC
-
69AK8664

RoHS

Each
1+
$59.610
100+
$59.610
250+
$59.610
500+
$59.610
1000+
$59.610
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
Screw
-
250V
240VAC
-
1 Phase, 3 Phase
5VA
-
240VAC
-
69AK8663

RoHS

Each
1+
$59.610
100+
$59.610
250+
$59.610
500+
$59.610
1000+
$59.610
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
Screw
-
250V
240VAC
-
3 Phase
5VA
-
240VAC
-
69AK8657

RoHS

Each
1+
$87.910
100+
$87.910
250+
$87.910
500+
$87.910
1000+
$87.910
Min: 1 / Mult: 1
-
DPDT
5A
DIN Rail
Screw
-
240VAC
300V
-
3 Phase
5VA
85V
300V
-
69AK8658

RoHS

Each
1+
$112.600
100+
$103.210
250+
$103.210
500+
$103.210
1000+
$95.270
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
Screw
-
250V
480VAC
-
3 Phase
16VA
208VAC
480VAC
-
69AK8655

RoHS

Each
1+
$64.680
100+
$64.680
250+
$64.680
500+
$64.680
1000+
$64.680
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
Screw
-
240VAC
500VAC
-
3 Phase
5VA
145VAC
500VAC
-
69AK8662

RoHS

Each
1+
$49.830
100+
$49.830
250+
$49.830
500+
$49.830
1000+
$49.830
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
Screw
-
250V
415VAC
-
3 Phase
15VA
-
415VAC
-
69AK8661

RoHS

Each
1+
$47.790
100+
$47.790
250+
$47.790
500+
$47.790
1000+
$47.790
Min: 1 / Mult: 1
-
SPDT
5A
DIN Rail
Screw
-
250V
415VAC
-
3 Phase
15VA
-
415VAC
-
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