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.
The VWKPU can be used to monitor any
208, 220 or 240V AC single phase voltage. The relay will energize (pickup) when
the voltage falls within 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 pick-up time delay (t1). If the operating voltage falls outside
the preset OVER or UNDER trip points for a period longer than the drop-out time
delay (t2), the relay will de-energize (drop-out). When the voltage returns to
normal (within the preset OVER & UNDER trip points) for a period longer
than the pick-up time delay (t1), the unit automatically resets and the relay
energizes. The pick-up time (t1) and drop-out time (t2) are independantly
adjustable. |
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Features:
- Monitors 208-240V AC single phase voltage
- Provides voltage band (window) protection
- Wide range of user-adjustable Over Voltage and Under
Voltage settings
- Independantly adjustable time delay on Pick-Up and
Drop-Out
- LED indicates output relay status
- Compact plug-in case utilizing industry standard 8 pin
octal socket
- 10A SPDT output contacts
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Click here for specifications and dimensions in .pdf
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Adjustable Nominal Voltage
Setting 208-240V AC
Adjustable Time Delay on Pick-up & Drop-Out from
0.1 - 10 Seconds |
| Part Number |
Nominal Voltage |
Under Voltage Range |
Over Voltage Range |
Wiring / Socket |
 VWKPU |
208, 220 & 240V AC |
75-100% of Nominal Voltage Setting |
100-125% of Pick-Up Setting |
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| Voltage Tolerance: |
+50%/-40% of nominal voltage; AC voltages are 50-60Hz; No
supply (input) voltage is required. |
| Load (Burden): |
Less than 3VA |
| Voltage Settings: |
Over Voltage: 100-125% of Normal Voltage
Under Voltage:
75-100% of Normal Voltage |
| Temperature: |
-28° to 65°C (-18° to 149°F) |
| Output Contacts: |
SPDT: 10A @ 240V AC/30V DC, 1/2HP @ 240V AC |
| Life: |
Mechanical: 10,000,000 operations
Full Load: 100,000
operations |
| Response Times: |
Power Up: 2 seconds fixed delay
Operate: 0.1 - 10 seconds
adjustable
Release: 0.1 - 10 seconds adjustable |
| Indicator LED: |
Red steady when relay is energized; Green when relay is off;
Green rapid flashing when in power-up mode. |
| Reset: |
Automatic |
