2-1
SECTION 2
CONTROLS AND INDICATORS
GENERAL
Table 2-1 lists and briefly describes the BE1-50/51M-222 controls and indicators. Reference the callouts
to Figures 2-1 and 2-2.
Table 2-1. BE1-50/51M-222 Controls and Indicators (Refer to Figures 2-1, 2-2, and 2-3)
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 0.080 inch diameter phone tip plug.
B
INST PICKUP Selectors
Two switches to select pickup current in amperes (TENS and
UNITS). Changing switch selectors while the relay is in
service may cause tripping.
C
Targets
Black target indicators trip to red and magnetically 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 to select pickup current in amperes (TENS and
UNITS). 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 (TENS and UNITS) 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
0.080 inch diameter phone tip plug.
H
PICKUP LED
Red LED indicates sensed current has exceeded the TIME
PICKUP setting. LED turns OFF when sensed current falls
below 95 % of pickup setting.
I
Target Reset Lever
Linkage extends through back of front cover to reset both
magnetically latched target indicators.
J
SW8 -1
SW8-1 selects the system operating frequency. SW8-1 open
(OFF) selects 60 hertz operation. SW8-1 closed (ON)
selects 50 hertz operation.
SW8-2
SW8-2 selects additional delay for the instantaneous
element. Switch SW8-2 closed (ON) provides an additional
instantaneous delay of 0.1 seconds.
SW8-3
SW8-3 closed (ON) provides an additional instantaneous
delay of 0.2 seconds. Closing both switches SW8-2 and -3
provides an additional instantaneous delay of 0.3 seconds.
Summary of Contents for BE1-50/51M-222
Page 29: ...BE1 50 51M 222 Installation 4 2 Figure 4 1 Outline Dimensions C1 Case ...
Page 30: ...BE1 50 51M 222 Installation 4 3 Figure 4 2 Panel Drilling Diagram C1 Case ...
Page 32: ...BE1 50 51M 222 Installation 4 5 Figure 4 4 DC Control Connections ...
Page 33: ...BE1 50 51M 222 Installation 4 6 Figure 4 5 BE1 50 51M 222 Overcurrent Relay Rear View ...