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We found 24 results matching your criteria.

3-Phase Monitor Relays Overview by Macromatic

3-Phase Monitor Relays protect motors and equipment from expensive damage due to voltage faults on three-phase systems. Refer to the table below for more information on the level of protection offered by each product, then click one of the Series to see details about a specific product type.


All products work on 50/60 Hz




Depending on the unit selected, it will protect three-phase equipment against:

Phase Loss: - total loss of one or more of the three phases. Also known as "single phasing." Typically caused by a blown fuse, broken wire, or worn contact. This condition would result in a motor drawing locked rotor current during start-up. In addition, a three phase motor will continue to run after losing a phase, resulting in possible motor burn-out.

Phase Reversal: - reversing any two of the three phases will cause a three phase motor to run in the opposite direction. This may cause damage to driven machinery or injury to personnel. The condition usually occurs as a result of mistakes made during routine maintenance or when modifications are made to the circuit.

Phase Unbalance: unbalance of a three phase system occurs when single phase loads are connected such that one or two of the lines (phases) carry more or less of the load. This could cause motors to run at temperatures above published ratings.

Undervoltage: when voltage in all three lines of a three phase system drop simultaneously. This could result in an increase in current & motor heating and a reduction in motor performance.

Overvoltage: - when voltage in all three lines of a three phase system increase simultaneously. Could cause a decrease in load current & poor power factor.

PAP Series by Macromatic
  • Phase Loss
  • Phase Reversal
  • Undervoltage
more info
PCP Series - Phase Reversal by Macromatic
  • Phase Reversal
more info
PLP Series by Macromatic
  • Phase Loss
  • Phase Reversal
more info
PMD Series by Macromatic
  • Phase Loss
  • Phase Reversal
  • Phase Unbalance
  • Undervoltage
  • Overvoltage
more info
PMP Series by Macromatic
  • Phase Loss
  • Phase Reversal
  • Phase Unbalance
  • Undervoltage
  • Overvoltage
more info
PMP-FA8X/11/12 Series by Macromatic
  • Phase Loss
  • Phase Reversal
  • Phase Unbalance
  • Undervoltage
  • Overvoltage
more info
PMPU-FA8 Series by Macromatic
  • Phase Loss
  • Phase Reversal
  • Phase Unbalance
  • Undervoltage
  • Overvoltage
more info
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Macromatic PAP208
Macromatic PAP208

3-Phase Line Monitor, SPDT, 8Pin, 208VAC more info
Macromatic PAP240
Macromatic PAP240

3-Phase Line Monitor, SPDT, 8Pin, 240VAC more info
Macromatic PAP400
Macromatic PAP400

3-Phase Line Monitor, SPDT, 8Pin, 400VAC more info
Macromatic PAP480
Macromatic PAP480

3-Phase Line Monitor, SPDT, 8Pin, 480VAC more info
Macromatic PAP575
Macromatic PAP575

3-Phase Line Monitor, SPDT, 8Pin, 575VAC more info
Macromatic PCP575
Macromatic PCP575

PHASE MONITOR RELAY PHASE REVERSAL 460-600VAC 10A SPDT more info
Macromatic PCPU
Macromatic PCPU

PHASE MONITOR RELAY PHASE REVERSAL 190-500VAC 10A SPDT more info
Macromatic PLP575
Macromatic PLP575

PHASE MONITOR RELAY PHASE LOSS & PHASE REVERSAL 460-600VAC 10A SPDT more info
Macromatic PLPU
Macromatic PLPU

PHASE MONITOR RELAY PHASE LOSS & PHASE REVERSAL 190-500VAC 10A SPDT more info
Macromatic PMD120
Macromatic PMD120

PHASE MONITOR RELAY PHASE LOSS PHASE REVERSAL PHASE UNBALANCE 120V more info
Macromatic PMD120-A1
Macromatic PMD120-A1

PHASE MONITOR RELAY PHASE LOSS PHASE REVERSAL PHASE UNBALANCE 120V more info
Macromatic PMD120-A2
Macromatic PMD120-A2

PHASE MONITOR RELAY PHASE LOSS PHASE REVERSAL PHASE UNBALANCE 120V more info
Macromatic PMD600
Macromatic PMD600

PHASE MONITOR RELAY PHASE LOSS PHASE REVERSAL PHASE UNBALANCE 575V more info
Macromatic PMDU
Macromatic PMDU

PHASE MONITOR RELAY PHASE LOSS PHASE REVERSAL PHASE UNBALANCE 208-480V more info
Macromatic PMDU-A1
Macromatic PMDU-A1

PHASE MONITOR RELAY PHASE LOSS PHASE REVERSAL PHASE UNBALANCE 208-480V more info
Macromatic PMDU-A2
Macromatic PMDU-A2

PHASE MONITOR RELAY PHASE LOSS PHASE REVERSAL PHASE UNBALANCE 208-480V more info
Macromatic PMP120
Macromatic PMP120

3Phase Line Monitor, SPDT, 8Pin, 102-138VAC more info
Macromatic PMP208-FA11
Macromatic PMP208-FA11

3-Phase Line Monitor, 11pin DPDT 208V more info
Macromatic PMP240-FA11
Macromatic PMP240-FA11

3-Phase Line Monitor, 11pin DPDT 240V more info
Macromatic PMP575
Macromatic PMP575

3Phase Line Monitor, SPDT, 8Pin, 460-600VAC more info
   
 
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