20-050

Frequency Sensitive Relays WILMAR™ Protective Relays – 20-000 Series Function: 81 O 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 deenergized during overfrequency or underfrequency conditions. Frequency Differential relays are energized between the preset frequencies. The pick-up and drop-out frequency settings are independently adjustable. 4 1/2 #6 - 32 STUDS 6 PLACES Operation: The normally open contacts close, and the normally closed contacts open, at all frequencies above the set point. The contacts in the connection diagram, are shown in the de-energized position (below the trip set point). 3 13/16 Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm. Part Number Input Voltage (± 10%) ...................... 120 VAC, Single Phase Frequencies Range (adjustable) ...... See Part Number Selection Differential ........................................ Frequency pick-up to drop-out differential is 1% max Temperature Range ......................... -40oC to +85oC Temperature Drift ............................. ± 1% frequency error over temperature range Voltage Error .................................... ± 1% for input voltage of 120 VAC ± 10% Contact Ratings ................................ 5 amp resistive at 120 VAC or 28 VDC Output Contacts ............................... One set N.O., one set N.C. Notes: 1. Remove screw for access to trip adjustment. 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) 3.0 1 /2 3 7 /8 3 2 3 /4 1 /2 3 PART NUMBER SELECTION 11 /64" DIA. 4 MTG. HOLES 120VAC PRODUCT SPECIFICATIONS PART NUMBER SELECTION Sample Part No. Type: 20 - Frequency Frequency Range 040 = 40-50 Hz 050 = 50-60 Hz 060 = 60-70 Hz 350 = 350-500 Hz 400 = 400-450 Hz Mounting Options X = Flange blank = Stud 20-050X 20-000 Series Consult factory for additional models. 41