BE1-81 General Information
1-6
Dropout Ratio
99 percent of pickup value (frequency difference).
Temperature Stability
Pickup point variation will not exceed 0.03 hertz over the operating
temperature range.
Undervoltage Inhibit
The relay is factory adjusted for an 80 Vac undervoltage inhibit level that
prevents nuisance tripping during protected equipment start-up. This level
may be internally adjusted by the user for inhibit levels between 40 and
120 Vac except for relays using option 1-2, Sensing Input Power Supply.
Output Circuits
Output contacts are rated as follows:
Resistive:
120/240 Vac Make 30 amperes for 0.2 seconds, carry 7 amperes continuously, and
break 7 amperes.
250 Vdc Make and carry 30 amperes for 0.2 seconds, carry 7 amperes
continuously, and break 0.3 amperes.
500 Vdc Make and carry 15 amperes for 0.2 seconds, carry 7 amperes
continuously, and break 0.1 amperes.
Inductive:
120/240 Vac, Make and carry 30 amperes for 0.2 seconds, carry 7 amperes continuously,
125/250 Vdc and break 0.3 amperes. (L/R = 0.04).
Isolation
1500 Vac at 60 hertz for one minute in accordance with IEC 255-5 and
ANSI/IEEE C37.90-1989 (Dielectric Test).
Radio Frequency
Maintains proper operation when tested for interference in accordance with
Interference (RFI)
ANSI/IEEE C37.90-1989,
Trial-Use Standard Withstand Capability of Relay
Systems to Radiated Electromagnetic Interference from Transceivers.
UL Recognized
UL Recognized per Standard 508, UL File No. E97033. Note: Output
contacts are not UL Recognized for voltages greater than 250 volts.
Surge Withstand Capability
Qualified to ANSI/IEEE C37.90.1-1989
Standard Surge Withstand Capabil-
ity (SWC) Tests for Protective Relays and Relay Systems.
Operating Temperature
-20C (-4F) to +65C (+149F).
Storage Temperature
-50C (-58F) to +90C (+194F).
Shock
In standard tests, the relay has withstood 15 g in each of three mutually
perpendicular planes without structural damage or degradation of perfor-
mance.
Vibration
In standard tests, the relay has withstood 2 g in each of three mutually per-
pendicular planes, swept over the range of 10 to 500 Hz for a total of six
sweeps, 15 minutes each sweep, without structural damage or degradation
of performance.
Weight
10.5 pounds net.
Case Size
S1. Dimensions shown in Section 4,
Installation
.