4310 ence purposes only. tyco Electronics Catalog 1308242 Issued 3-03 {PDF Rev, 6/07) HILOVAC WD2759 Over/Undervoltage Relays * Function 27/59 * ANSIAEEE C37.90-1978 WD2759 Operation WD2759 AC voltage sensing relays provide voltage monitoring and protection in AC systems from 50 to 400 Hz. Sensing voltages, number of phases, over and undervoltage setpoint, and time delays are user configured, WD2759 voltage relays operate when the externally adjustable trip point is reached, An external time delay control is provided with an adjustment of .5 to 10 sec- onds. This time delay may be used to prevent false trioping when there are slight variations in the voltage supply. On overvoltage (OV) the output relay energizes when the input signal exceeds the trip point. On undervoltage (UV) the output relay energizes when the input signal goes below the trip point. A green LED indicates power to the relay. Red LED lights indicate the state of the undervoltage and overvoltage trips. WD2759 Specifications Nominal Operating Range: 120, 208, 277 or 480 VAC, selectable. Maximum Sensing Range: 7O0VAC, Nominai Frequency Range: 50-400 Hz, Contact Form: 1 form C (SPDT} for undervoltage and 1 form G (SPDT) for overvoltage. Time Delay Adjustment: 0.5 to 10 sec. Sense Voltage: Voltage (nominal) 120 208 277 480 UV Adjustment Range 72-120 125-208 166-277 288-480 OV Adjustment Range 4120-1 88 208-291 277-388 480-672 Control Voltage: Model WD2759 -001 -002 ~003 Input Voltage (VDC) 78 to 54 13.510 32 100 ta 200 Input Voltage (VAC} - ~ 100 to 140 Ordering Information Typical Part Number > 12759 2. Type: 2759 = Over/Undervoltage Relay. Our authorized distributor is more likely to stock these items. WD2759-003. WD2759 Calibration The calibration marks on the faceplate have a maximum error of 10% and are provided only as quides. Proper calibration requires using an accurate voltmeter in parailef with the input signal. Use the following procedure to calibrate your relay. OVER VOLTAGE . Remove cover. . Adjust the TRIP SET control fully clockwise (CW) and the TIME DELAY control fully counterclockwise (CCW). : . Apply the desired trip voltage to the relay. . Slowly adjust the TRIP SET coniral CCW until the relay trips. . Remove the applied voltage (do not change the valtage level) and set the TIME DELAY conirol to the desired time delay, . Apply the trip voltage to the relay and measure the time to trip. . Adjust the TIME DELAY and repeat steps 4 and 5 until you have the desired time delay. Obi hea ~ a UNDER VOLTAGE . Remove cover. . Adjust the TRIP SET control fully CCW and the TIME DELAY control fully ccw. . Decrease the applied sensing voltage from the nominal value until the desired tripping voltage is reached, . Slowly adjust the TRIP SET control GW until the relay trips. , Set the TIME DELAY control to the desired time delay and apply nomi- nal voltage to the relay. . Step down the applied voltage from nominal to a level jest below the trip level set in Step 3 and measure the time delay. 7. Adjust the TIME DELAY and repeat steps 4 and 5 until the desired time delay is achieved. ons oo poo on WD2759 Controls 1 2 3 4 5 6 7 & o POWER 120% 3 5 ; = 3 2 i 100% 140%), 2] Trip Set 430 Trip Set [@ 3 5 5 277 120 O38 to SENSE VOLTAGE a8 19 Time Betay Time Belay (Seconds) {Seconds} uC) trip ov) trip 9 10 WW 12 13 14 15 16 WD2759 Typical Hookup SINGLE PHASE INPUT WD2759 Connections 3 PHASE INPUT OW TOOGOOVS As puase F VOLTAGE N PHASE VOUInGE UNDERVOLTAGE OvERVOLTAGE CONTACTS NTACTS anh 420 208 SENSE VOLTAGE a Je, Tima Dele; (Secsnda} bebo CONTROL bad Ferminnia 2, 3, and 6 @ fe used CONTROL BI-DIRECTIONAL AC OR DC INPUT CONTROL -OIRCCTIONAL AC OR DC INPUT Dimensions are in inches over {millimeters} unless otherwise specified. Dimensions are shown for refer- Specifications and availability subject to change. www.lycogleciranics.com fachnical support: Refer to inside back coves.