BE3-25
SYNCHRONIZING CHECK
RELAYS
APPLICATION:
The BE3-25 series are synchronizing check relays, also known as paralleling relays. They are used to ensure that two
AC supplies are synchronized. For a system to be synchronized, the frequency, phase angle, and voltage must be
within preset limits. The BE3-25-****4 can monitor either utility mains bus bar and incoming generator, or two
generators. The BE3-25-****4 offers user adjustment of the reset voltage from 10 to 30%. This voltage corresponds
to 6 to 20 electrical degrees. The unit compares the input voltage and phase relationship of the bus bar to that of the
generator. When the signal is within the preset limits, the relay energizes. The BE3-25-****5 operates as the
BE3-25-****4, but has the additional feature of a dead bus facility. This enables the relay to energize with a generator
supply only, which is a common requirement when utility mains failure occurs.
CASE CONNECTIONS:
GENERAL SPECIFICATIONS:
Input Set point
Nominal voltage: 120V, 240V, 380V, 480V Range: Adjustable 10% to 30% of
Other nominal voltages: Contact the factory generator voltage
Frequency: 50/60 or 400Hz (6-20 electrical degrees)
Burden: Less than 4VA terminals Differential: Fixed at 5%
marked GEN, less than 2VA Repeatability: Better than 0.5% of full span
terminals marked BUS Operating time: 500ms, typical
Overload: 1.5 times nominal voltage
continuous, 10 times nominal Weight and Case Size
voltage for 3 seconds Approx. 1.32 lbs. (0.6kg), 3.94 in. wide (100mm)
All units self-powered.
ULA-2
ROUTE 143, BOX 269 HIGHLAND, ILLINOIS 62249, U.S.A. PHONE 618-654-2341 FAX 618-654-2351 8-07
BE3-25
PERFORMANCE SPECIFICATIONS:
Environmental Applied Standards
Operating temperature: 0°C to 60°C (32°F to 140°F) General: IEC 144, BS 5420,
Functional temperature: -25°C to 70°C (-13°F to 158°F) VDE/VDI 0435, IEC 947,
Storage temperature: -40°C to 70°C (-40°F to 158°F) EN 60947
Temperature coefficient: 0.03% per °C (200ppm/°C) Safety: BS EN 61010, DIN 57411,
Relative humidity: 95% noncondensing VDE 0411, ANSI C37
Surge withstand: IEC 801, EN 55020,
Agency Approvals ANSI C37-90a
cULus listed to UL 508 and CSA C22.2 No. 14 RFI: RFI degree N, complies with
CE compliant VDE 0875
Gost R certified #POCC US.ME05.B03391
Relay Output
Insulation Relay type: D.P.D.T.
Test voltage: 4kV RMS 50Hz 1min between AC Rating: 250V, 5A, nonresistive,1200VA
Input, Case, and Auxiliary DC Rating: 125V, 1A, resistive, 120 watts
Impulse test: EMC 5kV transient, complies Mechanical Life: 5 million operations
with IEC 801, EN 55020
HF interference test: EHF 2.5kV 1MHz, complies Enclosure
with IEC 255-4 Mounting: Snap onto DIN rail 1.38in. x
Protection class: II, complies with IEC 348 .29in.(35mmx7.5mm),
complies with DIN-EN 50022,
BS 5584
Any position
Enclosure code: Case IP 50, terminals IP 30
Material: Complies with UL 94 VO
HOW TO ORDER:
Designate the Model Number followed by the complete Style Number.
Complete the Style Number by selecting one feature from each column of the Style Identification Chart and
entering its designation, letter or number, in the appropriate square. Note: The description of a complete relay
must include both Model Number and Style Number.
STYLE IDENTIFICATION CHART:
No. 1300 North Zhongshan Road, Wujiang Economic Development Zone
P.A.E. Les Pins, 67319 Wasselonne Cedex FRANCE Route 143, Box 269, Highland, Illinois U.S.A. 62249
Tel +33 3.88.87.1010 Fax +33 3.88.87.0808 Tel +1 618.654.2341 Fax +1 618.654.2351 Suzhou, Jiangsu Province, P.R. China 215200
e-mail: beifrance@basler.com e-mail: info@basler.com Tel +86(0)512 6346 1730 Fax +86(0)512 6346 1760
www.basler.com e-mail: beichina@basler.com
Printed in U.S.A.
