3.0 1 3 /2 3 7/8 Frequency Sensitive Relays WILMAR Protective Relays 25-000 Series Function: 81 O/U ANSI/IEEE C37.90-1978 The output contacts of frequency relays are ener- gized when the frequency exceeds the adjustable set point. Overfrequency and underfrequency relays are available in 50, 60 and 400Hz. Combination over/ 6 - 32 STUDS underfrequency band pass relays are also avail- 6 PLACES able. These are energized at rated frequency and de- energized during overfrequency or underfrequency conditions. Frequency Differential relays are ener- gized above the preset frequency. The pick-up and drop-out frequency settings are independently ad- justable. 1 4 /2 Operation: The normally open contacts close, and the normally 13 3 /16 closed contacts open, at nominal frequency. The contacts are de-energize at underfrequency, overfrequency or no input voltage. PART NUMBER SELECTION 11 /64 DIA. 4 MTG. HOLES Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm. PRODUCT SPECIFICATIONS PART NUMBER SELECTION Part Number 25-000 Series Sample Part No. 25-050X Type: Input Voltage (10%) ...................... 120 VAC 25 - Over/Underfrequency Frequency Range (adjustable) ........ See Part Number Selection Frequency Range Under Over 050 = 40-50 Hz 50-60 Hz Trip Points ........................................ Screwdriver adjustable 060 = 50- 60 Hz 60-70Hz o o Temperature Range ......................... -20 C to +85 C 400 = 350- 400 Hz 400-450Hz Mounting Options Temperature Drift ............................. 1% frequency error over temperature range X = Flange Voltage Drift ..................................... 1% frequency error input voltage variation of 10% blank = Stud Contact Ratings ................................ 5 Amp resistive at 120 VAC or 28VDC Consult factory for additional models. Output Contacts ............................... One set N.O., One set N.C. 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. 42 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) 3 2 /4 1 3 /2