Voltage Sensitive Relays WILMAR™ Protective Relays – WUVT/WOVT Series Function: 27/59 • ANSI/IEEE C37.90-1978 TERMINAL STRIPS #6 - 32 SCREWS • UL file No. E58048 • CSA file No. LR61158 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 and remains below the U/V set point for the duration of the set time delay. 3.0 Overvoltage Models - The relay is de-energized at normal voltages, N.C. contacts are closed and N.O. contacts are open. The relay will energize, when the voltage rises and remains above the O/V set point for the duration of the set time delay. 3 4 1 /8 1 /2 5 /8 4 3 1 /2 4 1 /4 / DIA. 4 MTG. HOLES Single Phase Three Phase 13 64" Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm. PRODUCT SPECIFICATIONS Part Number WUVT/WOVT Nominal Voltage ............................... 100 VAC to 575 VAC Phase ................................................ Single or Three Line Frequency ................................. 50-400 Hz Pick-up to Drop-out Differential ...... 1% typical Drop-out Point (u/v models) ........... 70-100% of nominal voltage, screwdriver adjustable Pick-Up Point (o/v models) ............. 100-125% of nominal voltage, screwdriver adjustable Output Contacts ............................... One set N.O, One set N.C. Contact Ratings ................................ 5 amp resistive at 120 VAC or 28 VDC Operating Temperature Range ........ -40°C to +70°C Power Consumption ........................ 3 VA maximum Time Delay ........................................ 0.5 to 20 seconds, screwdriver adjustable Voltage Reset ................................... The reset is automatic when voltage returns to normal. Notes: 1. Remove black screws for access to the voltage and time delay adjustment potentiometer. 2. Clockwise rotation of the voltage adjust potentiometer will raise the voltage trip point. 3. Clockwise rotation of the time adjust potentiometer will increase the time delay (Pick-up time for O/V models, drop-out time for U/V models). 4. The adjustments are single turn potentiometers, use a small screwdriver and do not force beyond the limit stops. 5. On U/V models, when the voltage falls to approximately 33% of nominal or below, the relay will drop out in 0.150 to 0 .300 seconds, regardless of the time delay setting. PART NUMBER SELECTION Sample Part No. WUVT-1-120 Type: WUVT - Undervoltage WOVT- Overvoltage No. Phases 1 = Single 3 = Three (line to line) Line Voltage VAC 100 240 115 380 120 416 150 440 200 460 208 480 220 525 230 575 Options: Blank - Standard A = 2 Form A Contacts B = 2 Form B Contacts H = 125VDC 3A Contacts P = Transient Protection 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. 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) 21