Easy-Start ES Instruction Manual
Options
SECTION 4
4-14
Application Notes
The table below shows the DIP SW DS21
settings along with the user determined start
time, cool down time, and the total time in
minutes:
DIP Switch DS21 Code
Ò1Ó = Closed
Ò0Ó = Open
USER
COOL
TOTAL
DS21
DETERMINED
DOWN
TIME
1234
START TIME
TIME
MINUTES
1111
0.5
1.5
2.0
0111
0.6
1.5
2.1
1011
0.7
1.5
2.2
0011
0.8
1.5
2.3
1101
1.0
1.5
2.5
0101
1.2
1.5
2.7
1001
1.4
1.5
2.9
0001
1.5
1.5
3.0
1110
2.5
1.5
4.0
0110
2.8
1.5
4.3
1010
3.6
1.5
5.1
0010
4.2
1.5
5.7
1100
5.0
1.5
6.5
0100
6.0
1.5
7.5
1000
8.5
1.5
10.0
0000
10.5
1.5
12.0
Easy-Start ES End-of-Ramp Option
This option is supplied on the same PC board as
the Extended Start Time Option. It senses the
SCR trigger analog voltage and sends out a
signal to tell us whenever the End of Ramp is
reached. This signal indicates that the motor has
reached 100% voltage and the SCRs are
FULL
ON
. This output signal is sent to a relay with 2
Form-C contacts (rated 1 amp 120V ac) which
change state at the
END-OF-RAMP
. These 2
Form-C contacts are brought out to 2 terminal
blocks on the Option Board; (TB21 and TB23).
Some typical applications for this option are:
- By-Pass Contactor control signal.
(Figure 4-3.)
- Sequential Starting of other motors, or
process functions.
This
END-OF-RAMP
option will operate with the
Easy-Start ES in either the Voltage Ramp or
Current Ramp mode. However, it will only send
out a signal whenever the motor voltage reaches
100%. Therefore, when running in the Current
Ramp mode, there may be a time lapse before
the
END-OF-RAMP
signal is executed. The
reason being that the current will usually reach
the end of its ramp-up before the motor reaches
full voltage. This depends on the type of load-
torque and inertia being impressed on the motor.
The
END-OF-RAMP
option can be turned on and
off with DIP switch DS22-2 (
OPEN
=off,
CLOSED
=on) located on the option board.
DS22-2 is factory set to the off position.
Extended Time-Current Option
This option enables the Easy-Start ES to extend
the time and current during Motor Starting. It is
supplied on the same PC board as the Extended
Start Time option.
This feature is helpful when a customer wishes to
start a motor under a current limit which is
beyond the normal current limit range of 200% to
500% of the Easy-Start ES DIP switch setting,
but when the customer still wishes to have
accurate overcurrent protection during normal
ÒrunÓ conditions.
By using an
oversized
Easy-Start ES model,
starting currents of 600% and greater can be
obtained, and still maintain motor protection
during starting and running.
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