function: 21 tyco electronics / www.tycoelectronics.com / factory direct technical support: 800-253-4560, ext. 2023 (u.s., canada, mexico) or 805-220-2020, e xt. 2023 (international) ansi/ieee c37.90-1978 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. 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. voltage sensitive relays product specifications sample part no. wuvt-1-120 type: wuvt - undervoltage wovt- overvoltage no. phases 1 = single 3 = three (line to line) line voltage vac 100 115 120 150 200 208 220 230 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. 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 part number 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 ........................................ voltage reset ................................... wuvt/wovt 100 vac to 575 vac single or three 50-400 hz 1% typical 70-100% of nominal voltage, screwdriver adjustable 100-125% of nominal voltage, screwdriver adjustable one set n.o, one set n.c. 5 amp resistive at 120 vac or 28 vdc -40 c to +70 c 3 va maximum 0.5 to 20 seconds, screwdriver adjustable the reset is automatic when voltage returns to normal. 240 380 416 440 460 480 525 575 single phase three phase 13 / 64 " dia. 4 mtg. holes 3 5 / 8 4 1 / 8 4 1 / 2 3.0 terminal strips #6 - 32 screws 3 1 / 2 4 1 / 4 27/59 wilmar ? protective relays C wuvt/wovt series note: dimensions in inches. multiply values by 25.4 for dimensions in mm.
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