BE1-46N Human-Machine Interface
2-1
SECTION 2 • HUMAN-MACHINE INTERFACE
CONTROLS AND INDICATORS
Table 2-1. BE1-46N Controls and Indicators (Refer to Figure 2-1)
Locator
Control or Indicator
Function
A
PICKUP (Trip Level)
Front-panel thumbwheel switch provides selection of the
negative sequence overcurrent pickup point that, when
exceeded, initiates timing. Setting is continuously
adjustable over the range of 1 to 50% in increments of
1%. A setting of 00 will be recognized as 1%. Any
setting beyond 50 will be recognized as 50%.
B
ALARM (Trip Level)
Front-panel thumbwheel switch provides selection of the
pickup point for the ALARM trip level and is continuously
adjustable over the range of 1 to 50% in increments of
1%. A setting of 00 will be recognized as 1%. Any
setting beyond 50 will be recognized as 50%.
C
K SET
Front-panel thumbwheel switch provides adjustment of
the relay timing characteristic over the range of 1 to 99 in
increments of 1. Allows the relay to match the character-
istics of the protected machine. See Figure 3-2 for
characteristic curves. A setting of 00 will be recognized
as a K-setting of 100.
D
MAX TIME (X 10 SEC)
Front-panel thumbwheel switch provides selection of the
maximum trip time over the range of 10 to 990 seconds
in increments of 10 seconds. Refer to Figure 3-2 for
characteristic curves. A setting of 00 will be recognized
as 1000 seconds.
E
POWER LED
LED illuminates when proper operating power is applied
to the relay internal circuitry.
F
TAP ADJUST
Front panel mounted, 10-position rotary switch
establishes the full-load current reference level (I
N
) for
the application. The 5 ampere model is adjustable from
3.0 A to 5.0 A in increments of 0.2 A. The one ampere
model is adjustable from 0.6 A to 1.0 A in increments of
0.04 A.
G
CAL Adjust
Provides a vernier adjustment between the selected TAP
ADJUST setting and the next lower TAP ADJUST
setting. A fully CW adjustment of the CAL control
provides the indicated TAP ADJUST setting. CCW
adjustment of the CAL control provides adjustments to
the next lower setting.
H
Reset Lever
Provides manual reset of Target indicator.
I
PUSH TO ENERGIZE
OUTPUT Pushbutton
Provides manual actuation of the output contacts by
inserting a 1/8 inch diameter, non-conducting rod through
the access hole in the front panel.
J
Trip Target Indicator
Provides visual indication that the trip output relay has
energized. Must be manually reset.
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