Kikusui KHA3000, Руководство по эксплуатации, Страница: 197 / 392

8
KHA3000
197
61000-3-3
Setting the V
olta
g
e Fluctuation T
est
Using Scaling Menu items
Scaling ( )
●
Range setting to use external sensors
When external sensors are used, the measurement range is determined by the conversion
ratio of the external sensor and the peak to rms ratio of the signal. Because the calculated
range is based on the particular range of this product, some range may not be used
depending on the maximum voltage or the maximum current of the external sensor.
Example Setting:
●
Setting of CF (peak to rms ratio)
The peak to rms ratio (i.e., peak value divided by the rms value) of the input signal is set for
CF. The CF value is used for over-range detection and automatic range control. By
adequately setting the CF value according to the characteristics of the sensors or
transformers to be used, magnetic saturation and other problems can be prevented.
●
Phase Adjustment
p. 108
When using external current sensors, the phase difference that may exist between the
voltage signal and the sensor signal can be adjusted.
●
List of Scaling Menu Items
●
List of Available Scaling Ranges
Voltage Range Range (V) when external sensors
are used
Product-specific range
(V) Example 1: Current Sensor
EXT-CS Ratio: 10 mV/A
Max. current: 200A rms
Saturation current: 400A peak
Current CF: 2 (= 400/200)
150 300
300 600
600 1.2 k
SC icon
See
External sensor for scaling
Menu item (
○
: Operable, ×: Inoperable)
PT Ratio Voltage
CF
CT
Ratio Current
CF EXT-CS
Ratio V/I
Phase
Adj.
Voltage PT (potential
transformer)
○ ○
× × × ×
Current CT (current transformer) × ×
○ ○
× ×
Optional current sensor × × × × × ×
External current sensor
/shunt × × ×
○ ○ ○
Setting Item Setting Range
Voltage
measurement PT Ratio 0.00 to 100.000
Voltage CF 1.00 to 2.00
Current
measurement CT Ratio 0.001 to 1000.000
Current CF 1.00 to 4.00
EXT-CS Ratio (mV/A) 0.250 mV/A to 2500.000 mV/A