2-1618071-9

Protective Relays 250 Series, Over/Undervoltage Product Specifications Product Facts n Function 27/59 6 -32 STUDS (6) n ANSI/IEEE C37.90-1978 The 250 series relays provide combined Overvoltage and Undervoltage protection in a single compact unit. 2 3 00 B.C 7 /8 . A transistorized circuit provides a sharp and accurate response at the preset tripping voltage; unaffected by temperature or frequency variations. 3 3.5 Models are available for single phase or three phase applications, and are suitable for either 50 Hz, 60 Hz, or 400 Hz operation. The trip point is adjustable. 2.7 . B.C 50 0 0 3.5 Nominal Voltage — See Ordering Information Undervoltage Trip — 70-100% of nominal voltage, screwdriver adjustable Overvoltage Trip — 100-125% of nominal voltage, screwdriver adjustable Pick-up to Drop-out Differential — 3% maximum Contact Ratings — 5 amp resistive at 120 VAC or 28 VDC Contact Form — One set N.O., one set N.C. Operating Temperature Range — -20˚C to +85˚C Notes: 1. Remove screws for access the overvoltage or undervoltage trip adjustments. Clockwise rotation of the adjustment potentiometer will raise the trip point. 13 / 64 " DIA. 4 MTG. HOLES Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm. Contact Arrangements 11 Protective Relays NC — Open at nominal voltage. Closed at Overvoltage and Undervoltage NO — Closed at nominal voltage. Open at Overvoltage and Undervoltage Single Phase Three Phase Ordering Information Sample Part Number 䊳 250X Model: L-L Volts 250X = 120 VAC, 1 Phase, 50-400 Hz 251X = 120/208 VAC, 3 Phase, 4 Wire, 50-400 Hz 252X = 115 VAC, 3 Phase, 3 Wire, 50-400 Hz 253X* = 230 VAC, 3 Phase, 3 Wire, 50-400 Hz 254X* = 380 VAC, 3 Phase, 3 Wire, 50-400 Hz 255X*= 460 VAC, 3 Phase, 3 Wire, 50-400 Hz 256X* = 575 VAC, 3 Phase, 3 Wire, 50-400 Hz Mounting Blank = Stud X = Flange * Enclosure height is 3.835" Consult factory for additional models. 11–17 Catalog 5-1773450-5 Revised 3-13 www.te.com Dimensions are shown for reference purposes only. Specifications subject to change. Dimensions are in millimeters unless otherwise specified. USA: +1 800 522 6752 Asia Pacific: +86 0 400 820 6015 UK: +44 800 267 666 For additional support numbers please visit www.te.com