Voltage Sensitive Relays
WILMAR™ Protective Relays – WUV/WOV DC Series
Function:
•
ANSI/IEEE C37.90-1978
Undervoltage Models
- The relay is energized at
normal voltage, N.C. contacts will open and N.O.
contacts will close. The relay will de-energize when
the voltage drops below the U/V set point.
Overvoltage Models
- The relay is de-energized at
normal voltage, N.C. contacts are closed and N.O.
contacts are open. The relay will energize when the
voltage rises above the O/V set point.
Note:
Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
(+)
(-)
PART NUMBER SELECTION
Sample Part No.
Type:
WOV - Overvoltage
WOUV - Undervoltage
Line Voltage VDC
125DC
12DC
240DC
18DC
250DC
24DC
305DC
28DC
405DC
32DC
430DC
48DC
470DC
60DC
560DC
120DC
Options:
Blank - Standard
A = 2 Form A Contacts
B = 2 Form B Contacts
H = 125 VDC Contacts
P = Transient Protection
WOV-12DC-A
PRODUCT SPECIFICATIONS
Part Number
Nominal Voltage .................................
Drop-out Point (u/v models) ...........
Pick-Up Point (o/v models) .............
Output Contacts ...............................
Contact Ratings ................................
Operating Temperature Range ........
Temperature Effects .........................
Power Consumption ........................
WOV/WUV
12 VDC to 560 VDC
70-100% of nominal voltage, screwdriver adjustable
100-125% of nominal voltage, screwdriver adjustable
One set N.O., One set N.C.
5 amp resistive at 120 VAC or 28 VDC
-40°C to +75°C
Less than 1% voltage drift over the temperature range.
12 to 60 VDC models: 1 W max.
120 to 305 VDC models: 2 W max.
405 to 470 VDC models: 3 W max.
560 VDC Model: 4 W max.
A short duration delay is provided to prevent nuisance
tripping due to momentary dips or surges in voltage.
The drop-out delay, following a voltage fault is 75 to
100 milliseconds
Time Delay ........................................
Transient Protection
- All voltage relays will withstand
momentary voltage surges of twice the nominal rated
input voltage (standard).
Option "P"
provides additional transient protection which
complies with the requirements of ANSI/IEEE C37.90-1978
Consult factory for additional models.
Notes:
1. Remove black screws for access to the O/V and U/V trip adjustment.
2. Clockwise rotation of the adjustment potentiometer will raise the voltage trip point.
3. The adjustments are by means of a single turn potentiometer. Use a small screwdriver and
do not force beyond the limit stops.
Tyco Electronics
/ www.tycoelectronics.com / Factory Direct Technical Support: 800-253-4560, ext. 2023 (U.S., Canada, Mexico) or 805-220-2020, ext. 2023 (International)
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