1 4 /8 5 3 /8 1 4 /2 11 /64 DIA. 4 HOLES Frequency Sensitive Relays Function: WILMAR Protective Relays WOF & WUF Series 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- 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. Time Delay Standard Time Delay Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm. A minimum, fixed inverse time delay is incorporated in PART NUMBER SELECTION all frequency relays to prevent nuisance tripping and is Typical Curves (WOF Series) represented by the typical curves shown below. Typical Curves (WUF Series) 90 60 Overfrequency Relay 58 Hz. Setting 85 Adjustable Time Delay Model WOF-12-6070 55 55 Hz. Setting If additional time delay is required, a suffix must be 80 50 50 Hz. Setting added to the part number. This allows the minimum 75 45 fixed time delay to be field-adjustable up to 20 seconds 70 Hz. Setting 40 70 Underfrequency Relay 65 Hz. Setting 35 65 Model WUF-12-5060 PART NUMBER SELECTION 62 Hz. Setting 30 60 Sample Part No. WUF-12-5060-T 01 23 45 6 0 1 2 3456 Drop-Out Time Delay Pick-Up Time Delay (sec) Type: PRODUCT SPECIFICATIONS WUF = Underfrequency WOF = Overfrequency Part Number WOF/WUF Input Voltage (VAC) Nominal Voltage (20%) ................. 120, 230, 380 and 460 volts 12 = 120 23 - 230 Nonimal Frequencies ....................... 50, 60 and 400 Hz. 38 = 380 Trip Point .......................................... Screwdriver adjustable. Adjustment range in accordance 46 = 460 with ordering information. Frequency Range 4050 = 40-50 HZ o o -20 C to +65 C Operating Temperature .................... 5060 = 50-60 HZ Differential ........................................ The frequency pitch-up to drop-out differential is .5% max 6070 = 60-70 HZ 3540 = 350-400 HZ Voltage Drift ....................................05% maximum frequency error for input voltage 4045 = 400-450 HZ (overfrequency only) variation of 10% Time Delay Options blank = Per Time Curve See Time versus Frequency curves Time Delay........................................ T = Adjustable In compliance with C37.90B ANSI/IEEE Surge Withstand Capability ............. Consult factory for additional models. One set N.O., one set N.C. Output Contacts ............................... 5 amp resistive at 120 VAC or 28VDC Contact Ratings ................................ 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 will increase the time for overfrequency relays and dropout time for underfrequency relays.. 39 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) 1 2 /2 1 3 /2 1 4 /4