25-000 Datasheet, PDF(1/1 Page) Tyco Electronics – WILMAR™ Protective Relays

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25-000 Datasheet, PDF (1/1 Pages) Tyco Electronics – WILMAR™ Protective Relays - 25-000 Series

WILMARâ¢ Protective Relays â 25-000 Series

#6 - 32 STUDS

6 PLACES

4 1/2

3 13/16

Frequency Sensitive Relays

Function: 81 O/U

â¢ 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/

underfrequency âband passâ 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 above the preset frequency. The pick-up and

drop-out frequency settings are independently ad-

justable.

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.

3 /4

2 1 /2

PART NUMBER SELECTION

/11 64" DIA.

4 MTG. HOLES

Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm.

Part Number

PRODUCT SPECIFICATIONS

25-000 Series

Input Voltage (Â±10%) ...................... 120 VAC

Frequency Range (adjustable) ........ See Part Number Selection

Trip Points ........................................ Screwdriver adjustable

Temperature Range ......................... -20oC to +85oC

Temperature Drift ............................. Â± 1% frequency error over temperature range

Voltage Drift ..................................... Â± 1% frequency error input voltage variation of Â± 10%

Contact Ratings ................................ 5 Amp resistive at 120 VAC or 28VDC

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.

PART NUMBER SELECTION

Sample Part No.

25-050X

Type:

25 - Over/Underfrequency

Frequency Range

Under

050 =

40-50 Hz

060 =

50- 60 Hz

400 =

350- 400 Hz

Mounting Options

X = Flange

blank = Stud

Over

50-60 Hz

60-70Hz

400-450Hz

Consult factory for additional models.

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)