Basler Electric BE1-50/51B - Manual (Page 27)

9252000991 Rev R BE1-50/51B Controls and Indicators 2-3
Table 2-1. BE1-50/51B 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 on five ampere models,
COARSE and FINE on one ampere models) 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 (TENS and UNITS on five ampere models,
COARSE and FINE on one ampere models) 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 This bicolor LED indicates the level of current sensed by the relay.
A green LED indicates that the relay is active but not picked up.
The LED changes to red when the sensed current exceeds the
time overcurrent pickup setting and back to green when the
sensed current decreases below 95% of the time overcurrent
pickup setting.
Note: A minimum of 0.5 A (5A units) or 0.1 A (1A units) is required
to light the LED. The LED may not turn green (active) before
turning red (picked up) at the 0.5 A pickup setting on 5A units or
0.1 A pickup setting on 1A units.
I Target RESET Button Linkage extends through back of front cover to reset both gravity
latched target indicators.