Macromatic Voltage Monitor Relays

Voltage Band Relays provide protection to equipment that is required to operate within an upper & lower voltage limit. As long as the operating voltage remains within an OVER & UNDER voltage range, the internal relay stays energized. If the operating voltage falls outside this range, the relay will drop-out.

When nominal operating voltage with a value between the UPPER & LOWER setting is applied, the internal relay will energize (Pick-up). If the operating voltage falls outside the preset OVER trip point (adjustable 100-125% of nominal) or UNDER trip point (adjustable 75-100% of nominal) for a period longer than the drop-out time delay (t), the relay will de-energize (Drop-out). When the voltage returns to normal (within the preset OVER & UNDER trip points), the unit automatically resets and the relay energizes. Choose between a unit with fixed drop-out time of 500ms or one with an adjustable 0.5-10 second drop-out time.

Features:

Monitors AC single phase and DC voltages
Provides voltage band (window) protection
Wide range of user-adjustable Over Voltage and Under Voltage settings
Fixed or adjustable time delay on drop-out
LED indicates output relay status
Compact plug-in case utilizing industry standard 8 pin octal socket
10A DPDT output contacts

Click here for specifications and dimensions in .pdf format

Fixed Drop-Out Time Delay (500ms)

Part Number	Nominal Voltage	Over Voltage Range	Under Voltage Range	Wiring / Socket
VWP024A	24V AC	24-30V AC	18-24V AC
VWP120A	120V AC	120-150V AC	90-120V AC
VWP012D	12V DC	12-15V DC	9-12V DC
VWP024D	24V DC	24-30V DC	18-24V DC
VWP048D	48V DC	48-60V DC	36-48V DC
VWP110D	110V DC	110-137V DC	83-110V DC

Adjustable Drop-Out Time Delay 0.5 - 10 Seconds

Part Number	Nominal Voltage	Over Voltage Range	Under Voltage Range	Wiring / Socket
VWKP024A	24V AC	24-30V AC	18-24V AC
VWKP120A	120V AC	120-150V AC	90-120V AC
VWKP012D	12V DC	12-15V DC	9-12V DC
VWKP024D	24V DC	24-30V DC	18-24V DC
VWKP048D	48V DC	48-60V DC	36-48V DC
VWKP110D	110V DC	110-137V DC	83-110V DC

Voltage Tolerance:	+25%/-50% of nominal voltage; AC voltages are 50-60Hz; No separate supply (input) voltage is required.
Load (Burden):	Less than 3VA
Voltage Settings:	Over Voltage: 100-125% of Nominal Voltage Under Voltage: 75-100% of Nominal Voltage
Temperature:	-28° to 55°C (-18° to 131°F)
Indicator LED:	Red Steady when Relay is energized; Green when Relay is Off.
Reset:	Automatic
Response Times:	Operate: 500ms Release: Fixed 500 ms (VWP Series), Adjustable 0.5 -10 Seconds (VWKP Series)
Output Contacts:	10A @ 240V AC/30V DC, 1/2HP @ 120/240V AC (N.O.), 1/3HP @ 120/240V AC (N.C.)
Life:	Mechanical: 10,000,000 operations Full Load: 100,000 operations
Transient Protection:	10,000 volts for 20 microseconds