1-1618067-1

Protective Relays 25-000 Series Product Specifications Product Facts n Function 81 O/U n ANSI/IEEE C37.90-1978 #6 - 32 STUDS 6 PLACES 3 13/16 1 /2 37 Notes: 1. The contacts are shown in the de-energized position. 2. Remove screws for access to the underfrequency and overfrequency trip adjustments. 3. Clockwise rotation of the adjustment potentiometer will raise the frequency trip points. 3.0 3 /8 Operation The normally open contacts close, and the normally closed contacts open, at nominal frequency. The contacts are de-energize at underfrequency, overfrequency or no input voltage. 4 1/ 2 2 3 /4 1 /2 3 11 Protective Relays The output contacts of frequency relays are energized when the frequency exceeds the adjustable set point. Overfrequency and underfrequency relays are available in 50, 60 and 400Hz. Combination over/underfrequency “band pass” relays are also available. These are energized at rated frequency and de-energized during overfrequency or underfrequency conditions. Frequency Differential relays are energized above the preset frequency. The pick-up and drop-out frequency settings are independently adjustable. Input Voltage (±10%) — 120 VAC Frequency Range (adjustable) — See Ordering Information Trip Points — Screwdriver adjustable Temperature Range — -20°C to +85°C Temperature Drift — ± 1% frequency error over temperature range Voltage Drift — ± 1% frequency error input voltage variation of ± 10% Contact Ratings — 5 Amp resistive at 120 VAC or 28VDC Output Contacts — One set N.O., One set N.C. 11 / 64 " DIA. 4 MTG. HOLES Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm. Ordering Information 25 -050 X Sample Part Number 䊳 Type: 25 - Over/Underfrequency Frequency Range Under 050 = 40-50 Hz 060 = 50- 60 Hz 400 = 350- 400 Hz Over 50-60 Hz 60-70Hz 400-450Hz Mounting Options X = Flange blank = Stud Consult factory for additional models. 11–31 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