GE Industrial Solutions ASTAT-CD Plus - Manual (Page 20)

4. Programming
4-5
Function Display Description Default Range Unit
4-4. Calibration block parameters -CAL-
Line voltage setting
Voltage calibration
Unit frame
Current calibration
Motor rated current
Overload protection
Service factor
U x x x
t x x x
U F x
m x x x
N x x x
o x x x
f x x x
U 4 8 0
t 4 8 0
U F 0
m 0 0 0
N 1 0 0
o N 2
f 1 0 0
Line Voltage from 200 to 500V. Set rated value.
Setting of this parameter allows better accuracy in
monitoring and voltage protections (see the voltage
calibration procedure).
Unit frame rating (F,G,H,...X).
Setting “0” disables current calibration.
Setting of this parameter allows better accuracy in
monitoring and current protections (see the current
calibration procedure).
100 x (In/Ir)
When this parameter is adjusted at a value higher than
105% the overload protection curve is automatically
adjusted to Class 10. "C1" if Cx was selected, or to NEMA
20 "N2" if Nx was selected.
Selects either the following overload curves:
OFF:
Overload protection disabled
(external overload relay must be used)
N1: NEMA 10
N2: NEMA 20
N3: NEMA 30 - (not available if N
≥
105)
C1: Class 10
C2: Class 20 - (not available if N
≥
105)
Motor service factor.
100-500
000-600
F, G, H, I, J, K, L,
M, N, Q, R, ...X
000-1300
040-120
OFF
N1, N2, N3,
C1, C2
100-130
V
V
-
A
%
-
%
Voltage calibration procedure
When the ASTAT-CD Plus is installed on site for the first time or after the logic printed circuit board is replaced, the voltage measurements will have
an accuracy of
± 10%. To improve the voltage measurement accuracy up to ± 3%, proceed as follows:
1. Turn the ASTAT-CD Plus ON and measure the RMS voltage on phases 1L1-3L2 using a calibrated voltmeter.
2. Search for the parameter “txxx”, set the measured voltage, and save this value by depressing the enter key. It is not necessary to save
this to the E2PROM, as the ASTAT-CD Plus does this automatically. NOTE: Set the actual, measured voltage while the ASTAT-CD Plus is
ON. DO NOT enter the motor nameplate voltage rating.
3. Once the ASTAT-CD Plus has been calibrated, this operation does not need to be repeated unless the logic printed circuit board has
been replaced or the ASTAT-CD Plus has been installed into a new application. NOTE: The parameter “txxx” will show the latest
calibration entry, which may differ from the actual voltage value.
Current calibration procedure
When the ASTAT-CD Plus is installed on site for the first time or after the logic printed circuit board is replaced, the current measurements will have
an accuracy of
±
10%. The internal electronic overload protection is also affected by this procedure. To improve the current measurement accuracy
up to
±
3% and to improve the accuracy of the motor overload protection, proceed as follows:
1. Search for the parameter “UF_ x” and enter the correct ASTAT-CD Plus frame type letter (“F”,”G”,”H”,..etc.).
2. Start the motor and measure the rms motor current using a calibrated ammeter. This measurement should be done at full load and full
speed and after the motor current has stabilized.
3. Search for the parameter “mxxx”, set the measured current and save this value by depressing the enter key. It is not necessary to save
this to the E2PROM, as the ASTAT-CD Plus does this automatically. NOTE: Set the actual rms measured current while motor is running
at full speed and under full load. DO NOT enter the motor nameplate current rating.
Once the ASTAT-CD Plus has been calibrated, this operation does not need to be repeated unless the logic printed circuit board has been replaced or
the ASTAT-CD Plus has been installed into a new application. NOTE: The parameter “mxxx” will show the latest entry, which may differ from the
actual current value.