9137300990 Rev J
BE1-81O/U General Information
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SPECIFICATIONS
BE1-81O/U electrical and physical specifications are listed in the following paragraphs.
Sensing Input
Voltage Range:
40 to 132 Vac
Frequency
Detection Range:
30 to 80 Hz (Revision D and subsequent)
35 to 80 Hz (Revision C and previous)
Computation Range:
40 to 70 Hz
Burden:
2 VA maximum
Operating Power Input
Relay operating power may be obtained from a wide variety of external voltage sources. When ordering,
any one of five internal power supply types may be selected to match the operating power voltage level
available at your site. Available power supply types are listed in Table 1-1.
Table 1-1. Power Supply Types
Input Voltage
Type
Nominal Range
Burden at Nominal
K (midrange)
48 Vdc
24 to 150 Vdc
3.6 W
J (midrange)
125 Vdc
120 Vac
24 to 150 Vdc
90 to 132 Vac
3.9 W
16.0 VA
L (low range)
24 Vdc
12 to 32 Vdc
∗
3.7 W
Y (mid range)
48 Vdc
125 Vdc
24 to 150 Vdc
24 to 150 Vdc
3.6 W
3.9 W
Z (high range)
250 Vdc
240 Vac
68 to 280 Vdc
90 to 270 Vac
3.9 W
24.6 VA
∗
The type L power supply initially requires 14 Vdc to begin operating. Once operating, the voltage may
be reduced to 12 Vdc and operation will continue.
Relay Outputs
One relay output is provided for each setpoint. Relay outputs can be specified as normally open or
normally closed. One normally open or normally closed auxiliary relay output per setpoint is also available
as an option.
Output Contacts
Resistive Ratings
120 Vac:
Make, break, and carry 7 Aac continuously
250 Vdc:
Make and carry 30 Adc for 0.2 s, carry 7 Adc continuously, and break 0.3 Adc
500 Vdc:
Make and carry 15 Adc for 0.2 s, carry 7 Adc continuously, and break 0.3 Adc
Inductive Ratings
120 Vac, 125 Vdc, 250 Vdc:
Break 0.3 A (L/R = 0.04)
Target Indicators (optional)
Electronically latching, manually reset targets indicate that a setpoint contact has energized. Either
internally operated or current operated targets may be specified.
Current operated targets require a minimum trip circuit current of 200 milliamperes and have a continuous
rating of 3 amperes, a two-minute rating of 7 amperes, and a one-second rating of 30 amperes.
Internally operated targets should be selected if the relay has normally-closed output contacts.
Summary of Contents for BE1-81O/U
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