Voltage Sensitive Relays
WILMAR™ Protective Relays – WUV/WOV Series
Function:
27/59
• ANSI/IEEE C37.90-1978
• UL file No. E58048
• CSA file No. LR61158
TERMINAL STRIPS
#6 - 32 SCREWS
Voltage sensitive relays are available for both AC and
DC applications for over/undervoltage protection.
Combination over/undervoltage relays provide
bandpass capabilities. AC relays are either single or
three-phase type. Three phase models are de-
signed to sense the average of the three phases or
the highest single phase. Voltage trip points are
screwdriver adjustable, and operation is time-de-
layed so that momentary voltage transients will not
cause nuisance tripping.
3.0
Typical Time Curve
40.0
30.0
Overvoltage Relays
WOV Series
20.0
10.0
0.0
11
/64" DIA.
4 MTG. HOLES
-10.0
Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
0
0.05
0.1
0.15
0.2
0.25
0.3
PART NUMBER SELECTION
Pick-Up Time Delay
PART NUMBER SELECTION
Single
Phase
Sample Part No.
Type:
WUV-1-120
Three
Phase
WUV - Undervoltage
WOV - Overvoltage
No. Phases
1 = Single
3 = Three
PRODUCT SPECIFICATIONS
Line Voltage VAC
Part Number
WUV/WOV
120
208
416
440
460
480
525
575
Nominal Voltage ...............................
Phase ................................................
Line Frequency .................................
Pick-up to Drop-out Differential ......
Drop-out Point (u/v models) ...........
Pick-Up Point (o/v models) .............
Output Contacts ...............................
Contact Ratings ................................
Operating Temperature Range ........
Power Consumption ........................
Time Delay ........................................
Minimum Life ...................................
120 VAC to 575 VAC
Single or Three
50-400 Hz
220
230
240
380
2.5% maximum
Options
70-100% of nominal voltage, screwdriver adjustable
100-125% of nominal voltage, screwdriver adjustable
One set N.O., One set N.C.
P - Transient Protection
A - Two Normally Open Contacts
B - Two Normally Closed Contacts
H - 125VDC, 3A Contacts
5 amp resistive at 120 VAC or 28 VDC
-20°C to +65°C
Transient Protection - All voltage relays will withstand
momentary voltage surges of twice the nominal rated
input voltage (standard).
2 VA maximum
150-300 ms (UV Model)
Option "P" provides additional transient protection
which complies with the requirements of ANSI/IEEE
C37.90-1978
500,000 operations
Notes:
1. Remove black screw for access to the voltage trip adjustment.
Consult factory for additional models.
2. Clockwise rotation of the adjustment potentiometer will raise the voltage trip point.
2 0
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