function: 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) ansi/ieee c37.90-1978 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 below the u/v set point. overvoltage models - the relay is de-energized at normal voltage, n.c. contacts are closed and n.o. contacts are open. the relay will energize when the voltage rises above the o/v set point. voltage sensitive relays product specifications sample part no. wov-12dc-a type: wov - overvoltage wouv - undervoltage line voltage vdc 12dc 18dc 24dc 28dc 32dc 48dc 60dc 120dc options: blank - standard a = 2 form a contacts b = 2 form b contacts h = 125 vdc 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 o/v and u/v trip adjustment. 2. clockwise rotation of the adjustment potentiometer will raise the voltage trip point. 3. the adjustments are by means of a single turn potentiometer. use a small screwdriver and do not force beyond the limit stops. part number selection part number nominal voltage ................................. drop-out point (u/v models) ........... pick-up point (o/v models) ............. output contacts ............................... contact ratings ................................ operating temperature range ........ temperature effects ......................... power consumption ........................ time delay ........................................ wov/wuv 12 vdc to 560 vdc 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 +75 c less than 1% voltage drift over the temperature range. 12 to 60 vdc models: 1 w max. 120 to 305 vdc models: 2 w max. 405 to 470 vdc models: 3 w max. 560 vdc model: 4 w max. a short duration delay is provided to prevent nuisance tripping due to momentary dips or surges in voltage. the drop-out delay, following a voltage fault is 75 to 100 milliseconds 125dc 240dc 250dc 305dc 405dc 430dc 470dc 560dc (+) (-) wilmar ? protective relays C wuv/wov dc series note: dimensions in inches. multiply values by 25.4 for dimensions in mm.
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