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