9252000897 Rev A
BE1-50/51B-233 Controls and Indicators
2-3
Table 2-1. BE1-50/51B-233 Controls and Indicators (Refer to Figures 2-1 and 2-2)
Locator
Control or Indicator
Function
A
INST MANUAL TRIP
Test Points
When shorted, the test points (jacks) provide a secure means to
manually trip the controlled breaker. Jacks accept a standard 0.08
inch diameter phone tip plug.
B INST
PICKUP
Selectors
Two switches (TENS and UNITS) to select pickup current in
amperes. Changing switch selectors while the relay is in service
may cause tripping.
C Targets
Red target indicators latch when the trip circuit current is greater
than 0.2 amperes. One target each for TIME and INST.
D TIME
PICKUP
Selectors
Two switches (UNITS and TENTHS) to select pickup current in
amperes. Changing switch selectors while the relay is in service
may cause tripping.
E
CURVE
Selector
Ten position selector switch to select one of nine inverse functions
or one fixed time function.
F
TIME DIAL
Selectors
Two selector switches (UNITS and TENTHS) to select the desired
characteristic curve. A setting of 0.0 results in instantaneous
operation without any intentional delay. A setting of 9.9
corresponds to the typical time provided by an electromechanical
relay at its maximum dial setting.
G
TIME MANUAL TRIP
Test Points
When shorted, the test points provide a secure means to manually
trip the controlled breaker. Jacks accept a standard 0.08 inch
diameter phone tip plug.
H
ACTIVE/PICKUP
LED
Red LED indicates sensed current has exceeded the TIME
PICKUP setting. LED turns from red to green when sensed current
falls below 95% of pickup setting. When the LED is green, the
relay is active but has not picked up.
I
Target
RESET
Button
Linkage extends through back of front cover to reset both gravity
latched target indicators.
SW3-1
SW3-1 provides an additional instantaneous delay of 0.2 second
when closed (ON). Closing both SW3-1 and SW3-2 provides an
additional instantaneous delay of 0.3 second.
SW3-2
SW3-2 provides an additional instantaneous delay of 0.1 second
when closed (ON). Closing both SW3-2 and SW3-1 provides an
additional instantaneous delay of 0.3 second.
SW3-3
SW3-3 provides selection of GE IAC type curves or ABB type
curves. Closing switch SW3-3 (ON) selects GE IAC type curves
(refer to Table 1-3). Opening switch SW3-3 (OFF) selects ABB
type curves (refer to Table 1-2).
SW3
SW3-4
SW3-4 provides selection of either instantaneous or integrating
reset characteristics. Closing SW3-4 (ON) selects integrating reset
characteristics. Opening SW3-4 (OFF) selects instantaneous reset
characteristics.
Summary of Contents for BE1-50/51B-233
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