Programming Example - GE GEH-5201 Instructions Manual

Synchronous-motor control vith cr192 microprocessor-based starting and protection module
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SECTION 8 - CR192 p,SPM Programming Instructions
NOTE: Replacements for all of the digits
must be en-
tered or the old set-point may affect the value of the
new. The decimal paint counts as a digit.
The # key will now act as a decimal point key. Some
parameters do not need decimal pOints and this will be demon-
strated in the following paragraphs. There is no need to enter
numbers any more accurately than one decimal pOint since the
ILSPM truncates any extra decimal positions. The backarrow key
[<--]
is used to correct any mistakes made when entering a set-
point. Simply press the backarrow key to clear the right-side of
the display and re-type the entry.
Parameter
Desired Value
Parameter Number
PFTRIP
0.85 LAG
1
PF DELAY
0.2 Second
2
STALL TIME
7.0 Second
3
RUNTIME
1.6
4
FULL LOAD CURRENT
58 Amperes
5
LOCKED ROTOR CURRENT
3.9
6
SYNCHRONIZING SLIP
4 Percent
7
LINE FREQUENCY
60 Hertz
8
C.T. RATIO
100/5
9
RESYNC
1
10
FCX DELAY
3.0 Seconds
11
FIELD VOLTAGE TRIP
125 Volts
12
FIELD CURRENT TRIP
45 Amperes
13
FIELD CT RATING
100
15
INCOMPLETE SEQUENCE
15 Seconds
16
REGULATOR PF
0.85
17
REGULATOR GAIN
10
18
FLOOR VOLTAGE
1.0
19
Table 5
Programming example
Keypress
Display Shows
SHIFT-PROGRAM
ACCESS CODE?
192
PARAMETER *?
ENTER
TRIP PF
=
0.65
#
0.65
*
0#85
0.65
0.85*
ENTER
TRIP PF
=
0.85
SCAN +
PF DELAY
=
5.0
#
5.0
*
0#2
5.0 0.2*
ENTER
PF DELAY
=
0.2
SCAN+
STALL TIME
=
35.0
#
35.0
*
07#0
35.0 07.0
ENTER
STALL TIME
=
07.0
SCAN +
RUN TIME
=
4.00
#
4.0
*
1#60
4.0 01.6*
ENTER
RUN TIME
=
1.6
SCAN+
FL.C.
=
100.
*
=
Cursor
A
Up Arrow indicates !-,SPM is in the Program Mode
8.6 Programming Example
The following example uses the following motor data and
should be referred to as the example progresses. The data is for
a 400-HP, 4000-volt, ring-type motor. We will assume that all of
the optional features available with the ILSPM have been
installed. Table 5 shows the keypresses made by the operator,
the ILSPM display response and comments concerning the
programming operation. At the beginning of the operation the
ILSPM should be displaying the" SPM READY"
message.
Motor -
400-HP, P.F.-0.8, RPM-720, Volts-4000. Induced
field current 0% SPD, 30-amps; 95% SPD, 17-amps.
Recommended field·discharge resistance is 21 ohms;
Allowable stall time -
7 seconds; 50 percent run time -
11 seconds.
NOTE: The induced field voltage (product of induced
field in amperes and discharge resistance in ohms)
must fall between 200-volts and 1 ODD-volts at both
zero and
95
percent speed. For this example:
21 OHMS x 30 AMPERES
=
630-VOLTS (ZERO SPEED CHECK)
21 OHMS and x 17 AMPERES
=
357-VOLTS (95 PERCENT SPEED CHECK)
The criterion is thus met for this example.
NOTE:
If
induced field voltage is greater than 1000-
volts, contact the factory.
Section 9 should be studied before using a brushless
controller equipped with the CR192ILSPM.
Comments
Request program mode
A
Access code accepted
A
First parameter displayed
A
# key enables change mode
A
New value has been selected
A
New value has been entered
A
Next set-point is displayed
A
Change mode
A
Note # key is decimal point
A
New value has been entered
1\
Next set-point
A
Change mode
A
7 second stall time
A
New value has been entered
A
Next set-point
A
Change mode
A
11 second run time (1.6 x 7 second)
A
New value has been entered
A
Next set-point
33

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