250X Datasheet, PDF (1/1 Pages) Tyco Electronics – WILMAR™ Protective Relays - 250 Series, Over/Undervoltage

Voltage Sensitive Relays
WILMAR™ Protective Relays – 250 Series, Over/Undervoltage
6 -32 STUDS (6)
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Function: _27/59
• ANSI/IEEE C37.90-1978
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.
Single
Phase
2.7530.5B0.0C.
/¹³ 64" DIA.
4 MTG. HOLES
Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
Three
Phase
Part Number
PRODUCT SPECIFICATIONS
250 Series
Nominal Voltage ............................... See Part Number Selection
Undervoltage Trip ............................ 70-100% of nominal voltage, screwdriver adjustable
Overvoltage Trip ............................... 100-125% of nominal voltage, screwdriver adjustable
Pick-Up to Drop-Out Differential ..... 3% maximum
Contact Ratings ................................ 5 amp resistive at 120 VAC or 28 VDC
Contact Form .................................... One set N.O., one set N.C.
Operating Temperature Range ........ -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.
Contact Arrangements
NC - Open at nominal voltage. Closed at
Overvoltage and Undervoltage
N O - Closed at nominal voltage. Open at
Overvoltage and Undervoltage
PART NUMBER SELECTION
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
253X* = 230 VAC, 3 Phase, 3 Wire, 50-400 Hz
254X* = 380 VAC, 3 Phase, 3 Wire, 50-400 Hz
255X*= 460 VAC, 3 Phase, 3 Wire, 50-400 Hz
256X* = 575 VAC, 3 Phase, 3 Wire, 50-400 Hz
Mounting
Blank = Stud
X = Flange
* Enclosure heigth is 3.835"
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)
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