Function:

25

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)

The 250 series relays provide combined Overvolt-

age and Undervoltage protection in a single

compact unit.

Models are available for single phase or three

phase applications, and are suitable for either 50

Hz, 60 Hz, or 400 Hz operation. The trip point is

adjustable.

A transistorized circuit provides a sharp and

accurate response at the preset tripping voltage;

unaffected by temperature or frequency variations.

Voltage Sensitive Relays

PRODUCT SPECIFICATIONS

Sample Part No.

250X

Model: L-L Volts

250X = 120 VAC, 1 Phase, 50-400 Hz

251X = 120/208 VAC, 3 Phase, 4 Wire, 50-400 Hz

252X = 115 VAC, 3 Phase, 3 Wire, 50-400 Hz

Mounting

Blank = Stud

X = Flange

Consult factory for additional models.

PART NUMBER SELECTION

Part Number

Nominal Voltage ...............................

Undervoltage Trip ............................

Overvoltage Trip ...............................

Pick-Up to Drop-Out Differential .....

Contact Ratings ................................

Contact Form ....................................

Operating Temperature Range ........

250 Series

See Part Number Selection

70-100% of nominal voltage, screwdriver adjustable

100-125% of nominal voltage, screwdriver adjustable

3% maximum

5 amp resistive at 120 VAC or 28 VDC

One set N.O., one set N.C.

-20

°C to +85°C

Notes:

1.

Remove screws for access the overvoltage or undervoltage trip adjustments. Clockwise rotation

of the adjustment potentiometer will raise the trip point.

13

4 MTG. HOLES

2.750

B.C.

3.500

2

6 -32 STUDS (6)

Contact Arrangements

N C - Open at nominal voltage. Closed at

Overvoltage and Undervoltage

N O - Closed at nominal voltage. Open at

Overvoltage and Undervoltage

Single

Phase

Three

Phase

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WILMAR™ Protective Relays – 250 Series, Over/Undervoltage