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| Frequency Sensitive Relays WILMARTM Protective Relays - WOF & WUF Series 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 energized 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 available. These are energized at rated frequency and deenergized during overfrequency or underfrequency conditions. Frequency Differential relays are energized above the preset frequency. The pick-up and drop-out frequency settings are independently adjustable. 2 1/2 Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm. Typical Curves (WOF Series) 90 85 Overfrequency Relay Model WOF-12-6070 5 /8 3 1 /8 42 1/ 4 3/ 14 4/ 12 /64" DIA. 4 HOLES 11 Time Delay Standard Time Delay A minimum, fixed inverse time delay is incorporated in PART NUMBER SELECTION all frequency relays to prevent nuisance tripping and is represented by the typical curves shown below. 58 Hz. Setting 55 Hz. Setting Typical Curves (WUF Series) 60 55 50 45 80 50 Hz. Setting 75 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 70 Hz. Setting 70 40 35 30 65 65 Hz. Setting 62 Hz. Setting 0 1 2 3 4 5 6 Underfrequency Relay Model WUF-12-5060 0 1 2 3 4 5 6 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 Consult factory for additional models. 60 Pick-Up Time Delay (sec) 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 .................... -20oC to +65oC 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 Output Contacts ............................... One set N.O., one set N.C. 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) 39 |
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