Macromatic VMP Series Catalog Page
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voltage monitor relays
PRODUCT SUMMARY
Voltage Monitor 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.
Macromatic offers two styles of Voltage Monitor Relays:
Over/Under Voltage Relays-provides protection to equipment
where either an over or under voltage condition is potentially
damaging. When used as an under voltage relay, they provide
protection to equipment that is required to operate above a
minimum voltage. When used as over voltage relays, they
protect equipment against excessive voltage conditions.
Over/Under Voltage Relays are designed to energize when the
monitored voltage reaches a preset value (Umax) and drop-out
when the monitored voltage drops to a level below the preset value
(Umin).
Voltage Band Relays-provides protection to equipment that is
required to operate within an upper and lower voltage limit. As
long as the monitored voltage remains within an OVER (Umax)
and UNDER voltage (Umin) range, the internal relay stays energized. If the monitored voltage falls outside this range, the relay will
drop-out.
These products are summarized below:
OVER/UNDER VOLTAGE RELAYS
Monitored
Voltage
12V DC, 24V DC, 48V DC,
110V DC, 120V AC,
240V AC & 480V AC
Monitored
Voltage
12V DC, 24V DC, 48V DC,
110V DC, 120V AC,
240V AC & 480V AC
24V DC, 120V AC, 240V AC Adjustable Adjustable Adjustable 0.1-10 Seconds DIN-Rail VWKE
Pick-up
Setting
Adjustable Fixed Fixed 0.5 Seconds Plug-in VMP
Adjustable Adjustable Adjustable 0.1-10 Seconds Plug-in VAKP
Overvoltage
Setting
Adjustable Adjustable Adjustable 0.1-10 Seconds Plug-in VWKP
Drop-out
Setting
VOLTAGE BAND RELAYS
Undervoltage
Setting
Time Delay
on Drop-out (t)
Time Delay
on Drop-out (t) Mounting Series
Mounting Series
2
voltage monitor relays | plug-in
OVER/UNDER VOLTAGE | FIXED TIME DELAY & DROP-OUT
12-480V | VMP Series
Over/Under Voltage Relays provide protection to equipment where an over or
under voltage condition is potentially damaging. They are designed to energize
when the operating voltage reaches a preset value and drop-out when the
operating voltage drops to a level below the preset value.
The pick-up voltage setting (Umax) is user-adjustable across the full range as
shown in the table below. The VMP Series has a drop-out voltage setting (Umin)
xed at 95% of the pick-up voltage setting (an adjustable drop-out setting of 7595% of the pick-up setting is available on the VAKP Series). The relay energizes
(and the LED is Red) when the monitored voltage is above the pick-up setting
for a period longer than the xed pick-up time delay of 0.5 seconds. The relay
de-energizes (and the LED is Green) when the monitored voltage is below the
drop-out setting for a period longer than the drop-out time delay (t), which is xed
at 0.5 seconds.
Adjustable Pick-Up, Fixed Drop-Out Settings*
Fixed Time Delay on Drop-out at 0.5 Seconds
12-120V
Monitors AC single phase and DC
voltages
True RMS voltage measurement
ensures more accurate sensing
Wide range of user-adjustable
pick-up voltages
Fixed time delay on drop-out of 0.5
seconds
LED indicates output relay status
Pilot duty rating
Compact plug-in case utilizing
industry standard 8 pin octal socket
240-480V
PICK-UP DROP-OUT*
NOMINAL VOLTAGE VOLTAGE PRODUCT WIRING/
VOLTAGE (UMAX) (UMIN) NUMBER SOCKET
12V DC 9-15V DC 7-14V DC VMP012D
24V DC 18-30V DC 14-28V DC VMP024D
48V DC 36-60V DC 27-57V DC VMP048D
110V DC 83-138V DC 62-130V DC VMP110D
120V AC 90-150V AC 68-142V AC VMP120A
240V AC 180-300V AC 135-285V AC VMP240AX
240V AC 180-300V AC 135-285V AC VMP240A
480V AC 360-600V AC 270-570V AC VMP480A p
* Drop-out Voltage is xed at 95% of the adjusted Pick-up Setting.
p
Requires a 600V-rated socket
8 Pin Octal
70169-D
DIAGRAM 214
8 Pin Octal
70169-D
DIAGRAM 213
8 Pin Octal
70169-D
DIAGRAM 150
with
appropriate
socket
Sockets & Accessories available
3
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