1-4 BE1-27/59 General Information 9170600990 Rev H
Style Number Example
If a BE1-27/59 relay has a style number of A3F–E1J–A0S1F, the relay h
as the following features:
A ------- Single-phase voltage sensing input
3-------- Sensing input compatible with a pickup adjustment range of 55 to 160 Vac
F-------- Two normally open output relays (one per function)
E1------ Definite timing for each function
J -------- Relay control power is 125 Vdc or 120 Vac, nominal
A ------- Two internally operated target indicators (one per function)
0-------- No instantaneous functions
S ------- Push-to-energize outputs
1-------- Two normally-open auxiliary output relays (one per function)
F-------- Semi-flush mounting case
SPECIFICATIONS
Electrical and physical specifications are listed in the following paragraphs.
Voltage Sensing Inputs
Nominally rated at 50/60 Hz, (120/240 V or 100/200 V) with a maxi
mum continuous voltage rating of 360
V (120 V nominal) or 480 V (240 V nominal) at a burden less than 1 VA per phase. Frequency range is
from 40 to 70 Hz.
Undervoltage and Overvoltage Pickup Range
Pickup Range: Contin
uously adjustable over the range of 1 to 40, 55 to 160, or 110
to 320 Vac as defined by the Style Chart. See Section 3, Functional
Description, System Voltages, for explanation of pickup ranges.
Pickup Accuracy: ±2% or ±0.5 volts of the pi
ckup setting, whichever is greater.
Dropout: ±2% of picku
p.
Timing Characteristics
Instantaneous: Less than 50
milliseconds for a voltage level that exceeds the pickup
setting by 5% or 1 volt, whichever is greater
Definite: Adjusta
ble from 0.1 to 9.9 seconds, in steps of 0.1 seconds.
Accuracy is ±2% or ±50 milliseconds, whichever is greater. (A setting
of 0.0 provides instantaneous timing.)
Inverse: I
nverse curve types are defined by the Style Chart and are
represented by the curves shown in Section 3, Functional
Description. Inverse time is adjustable from 01 to 99 in increments of
01. Incrementing the time dial varies the inverse curve along the Y
axis. A setting of 00 designates instantaneous timing.
Ac
curacy is within ±5% or 50 milliseconds (whichever is greater) of
the indicated time for any combination of the time dial setting and
pickup setting and is repeatable within ±2% or 50 ms (whichever is
greater) for any combination of time dial and tap setting. Curves
were generated with Prefault voltage at 10% greater than pickup for
the 27 curves and 10% less than pickup for the 59 curves. For
Prefault voltages that are greater in difference from the pickup
setting, the timing accuracy is ±10% or 100 ms (whichever is
greater).
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