VOLTAGE MONITOR RELAYS

Voltage sensing relays monitor either AC single phase (50-60Hz) or DC voltages to protect equipment against voltage fault conditions. No separate supply (input) voltage is required on any Macromatic voltage monitor relay since each unit is powered by monitored voltage. Versions are available in either a compact plug-in case utilizing an 8-pin octal socket or a 17.5mm DIN Rail mounted case.

Protect Equipment Against Premature Equipment Failure

Over/Under Voltage Relays protect equipment against either an over- or under-voltage condition. Select from fixed or adjustable time delay on drop-out. Voltage Band Relays protect equipment that is required to operate within an upper and lower voltage limit. The relay stays energized as long as the monitored voltage remains within the adjustable range.

 

PLUG-IN

VMP Series and VAKP Series provide Over/Under voltage protection. VWKP Series provide Voltage Band protection. These relays use 8-pin octal sockets for mounting on 35 mm DIN-rail or to a panel.

17.5 MM WIDE, DIN-RAIL

Narrow VWKE Series, with enclosures for mounting on 35 mm DIN-rail, provide Voltage Band protection. Their compact design is ideal for saving space in control panels.

Enclosure Style
Enclosure Style
  • Plug-in (22)
  • 17.5mm DIN-Rail (3)
Function
Function
  • Over/Undervoltage Relay w/ adjustable time delay on drop-out (15)
  • Voltage band relay (10)
Drop Out Voltage Settings
Drop Out Voltage Setting
  • Adjustable % of Pick-up Voltage Setting (17)
  • Fixed % of Pick-up Voltage Setting (8)
Output
Output
  • 10A DPDT (15)
  • 10A SPDT (6)
  • 15A SPDT (3)
  • 5A DPDT (1)
Monitored Voltage
Monitored Voltage
  • 240VAC (4)
  • 120VAC (3)
  • 24VDC (3)
  • 110VDC (2)
  • 12V DC (2)
  • 480VAC (2)
  • 48VDC (2)
  • 18-30V DC (1)
  • 180-300V AC (1)
  • 36-60V DC (1)

Need a custom engineered product? We offer engineering assistance and quick turnarounds on prototypes.

FILTER BY MODEL NUMBER
Model Number
SORT BY
product sort by

VWKP

Series

Function: 

Voltage band relay

Output:

10A DPDT

Monitored Voltage:

48VDC

Drop Out Voltage Setting: 

Adjustable % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$120.98

VWKP

Series

Function: 

Voltage band relay

Output:

10A DPDT

Monitored Voltage:

110VDC

Drop Out Voltage Setting: 

Adjustable % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$120.98

VWKP

Series

Function: 

Voltage band relay

Output:

10A DPDT

Monitored Voltage:

120VAC

Drop Out Voltage Setting: 

Adjustable % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$120.98

VWKP

Series

Function: 

Voltage band relay

Output:

10A SPDT

Monitored Voltage:

240VAC

Drop Out Voltage Setting: 

Adjustable % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$140.11

VWKP

Series

Function: 

Voltage band relay

Output:

10A SPDT

Monitored Voltage:

480VAC

Drop Out Voltage Setting: 

Adjustable % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$140.11

VMP

Series

Function: 

Over/Undervoltage Relay w/ adjustable time delay on drop-out

Output:

10A DPDT

Monitored Voltage:

110VDC

Drop Out Voltage Setting: 

Fixed % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$112.02

VMP

Series

Function: 

Over/Undervoltage Relay w/ adjustable time delay on drop-out

Output:

10A DPDT

Monitored Voltage:

120VAC

Drop Out Voltage Setting: 

Fixed % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$112.02

VMP

Series

Function: 

Over/Undervoltage Relay w/ adjustable time delay on drop-out

Output:

10A SPDT

Monitored Voltage:

240VAC

Drop Out Voltage Setting: 

Fixed % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$140.11

VMP

Series

Function: 

Over/Undervoltage Relay w/ adjustable time delay on drop-out

Output:

5A DPDT

Monitored Voltage:

240VAC

Drop Out Voltage Setting: 

Fixed % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$148.24

VMP

Series

Function: 

Over/Undervoltage Relay w/ adjustable time delay on drop-out

Output:

10A SPDT

Monitored Voltage:

480VAC

Drop Out Voltage Setting: 

Fixed % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$140.11

VWKE

Series

Function: 

Voltage band relay

Output:

15A SPDT

Monitored Voltage:

24VDC

Drop Out Voltage Setting: 

Adjustable % of Pick-up Voltage Setting

Enclosure Style:

17.5mm DIN-Rail

$89.29

VAKP

Series

Function: 

Over/Undervoltage Relay w/ adjustable time delay on drop-out

Output:

10A DPDT

Monitored Voltage:

9-15V DC

Drop Out Voltage Setting: 

Adjustable % of Pick-up Voltage Setting

Enclosure Style:

Plug-in

$120.98

Frequently Asked Questions About Voltage Monitor Relays

 
 

Voltage Monitor Relay Downloads

Voltage Monitor Relays

Knowledge Base Articles

Technical reports to answer your questions

Knowledge Base Articles

Rapid Cycling of Control Switch Damages Large Pumps or Compressor Motors

Issue: How do I prevent a Bouncing Control Switch Due to Splashing Water from Rapidly Energizing One Load and Then the Other?   Solution/Resolution:  In Figure A, a single Control Switch could be susceptible to splashing water which would cause rapid opening & closing of the Control Switch.  Each time this happens, one Load is rapidly […]

Knowledge Base Articles

Interactive Competitive Cross-Reference

Did you know . . .

Knowledge Base Articles

Troubleshooting for a Phase Reversal (Phase Sequence) Problem

Issue: I have purchased one of your three phase monitor relays and have connected it per the diagram on the unit. However, I cannot get the unit to operate–it just won’t turn on. What’s wrong? Solution/Resolution: Most problems when first installing and applying a three-phase monitor relay are due to phase sequence issues. Although you […]

Knowledge Base Articles

Troubleshooting for a Phase Reversal (Phase Sequence) Problem

Issue: I have purchased one of your three phase monitor relays and have connected it per the diagram on the unit. However, I cannot get the unit to operate–it just won’t turn on. What’s wrong? Solution/Resolution: Most problems when first installing and applying a three-phase monitor relay are due to phase sequence issues. Although you […]

Need Answers? Look Here.

NEED A CUSTOM ENGINEERED PRODUCT

We offer engineering assistance for you unique applications, quick turnarounds on prototypes, and the best technical support in the industry

Custom engineered product

LOCATE A DISTRIBUTOR

If you have a need for a small quantity, our Authorized Distributors have many of our products in stock, ready for immediate shipment.  They can answer any questions you may have.