WOF Datasheet, PDF (1/1 Pages) Tyco Electronics – Frequency Sensitive Relays

WILMAR™ Protective Relays – WOF & WUF Series
3 ^{1 /2}
4 ^{1 /4}
Frequency Sensitive Relays
Function: 81 O/U
• ANSI/IEEE C37.90-1978
• UL file No. E58048
• CSA file No. LR61158
Application:
The output contacts of frequency relays are ener-
gized when the frequency exceeds the adjustable set
point. Overfrequency and underfrequency relays are
available in 50, 60 and 400Hz. Combination over/
underfrequency “band pass” relays are also avail-
2 ¹/2
able. These are energized at rated frequency and de-
energized during overfrequency or underfrequency
conditions. Frequency Differential relays are ener-
gized above the preset frequency. The pick-up and
drop-out frequency settings are independently ad-
justable.
/¹¹ 64" DIA.
4 HOLES
Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
Typical Curves (WOF Series)
90
Overfrequency Relay
85
Model WOF-12-6070
80
75
70 Hz. Setting
70
65 Hz. Setting
65
62 Hz. Setting
60
0
1
2
3
4
5
6
Pick-Up Time Delay (sec)
Typical Curves (WUF Series)
60
58 Hz. Setting
55
55 Hz. Setting
50
50 Hz. Setting
45
40
Underfrequency Relay
35
Model WUF-12-5060
30
0
1
2
3
4
5
6
Drop-Out Time Delay
PRODUCT SPECIFICATIONS
Part Number
WOF/WUF
Nominal Voltage (±20%) ................. 120, 230, 380 and 460 volts
Nonimal Frequencies ....................... 50, 60 and 400 Hz.
Trip Point .......................................... _{Screwdriver adjustable. Adjustment range in accordance}
with ordering information.
Operating Temperature .................... -20^oC to +65^oC
Differential ........................................ The frequency pitch-up to drop-out differential is .5% max
Voltage Drift ..................................... _{± .05% maximum frequency error for input voltage}
variation of ±10%
Time Delay ........................................ See Time versus Frequency curves
Surge Withstand Capability ............. In compliance with C37.90B ANSI/IEEE
Time Delay
Standard Time Delay
A
all
minimum,
frequency
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represented by the typical curves shown below.
Adjustable Time Delay
If additional time delay is required, a suffix "T" must be
added to the part number. This allows the minimum
fixed time delay to be field-adjustable up to 20 seconds
PART NUMBER SELECTION
Sample Part No.
WUF-12-5060-T
Type:
WUF = Underfrequency
WOF = Overfrequency
Input Voltage (VAC)
12 = 120
23 - 230
38 = 380
46 = 460
Frequency Range
4050 = 40-50 HZ
5060 = 50-60 HZ
6070 = 60-70 HZ
3540 = 350-400 HZ
4045 = 400-450 HZ (overfrequency only)
Time Delay Options
blank = Per Time Curve
T = Adjustable
Output Contacts ............................... One set N.O., one set N.C.
Consult factory for additional models.
Contact Ratings ................................ 5 amp resistive at 120 VAC or 28VDC
Notes:
1. Remove black screws for access to the frequency and the time adjustments.
2. Clockwise rotation of the frequency potentiometer will raise the frequency trip point.
3. Clockwise rotation of the time adjustment, option "T" will increase the time for overfrequency relays and
dropout time for underfrequency relays..
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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