Kikusui KHA3000, Operation Manual, Page: 139 / 392

6
KHA3000
139
Executing Harm
onic Tests
Estimating the Rsce (61000-3-12)
Estimate the Rsce before preparing a power supply that satisfies the standard requirements
for the impedance in relation to estimated values. Because the AC power supply does not
have an impedance function that satisfies the standard requirements, the customer is
requested to prepare it separately.
Standard Requirements for Impedance
The standard requirements for the impedance depend on the applied limit value.
• When the limit value of balanced three-phase equipment with specified conditions is
applied, the impedance must be at least 1.6 times the estimated Rsce.
• When the limit value of balanced three-phase equipment or other equipment is applied,
the impedance must be equal to or greater than the estimated Rsce.
Selecting the Limit Value
1
Press the HA key.
The HA-Test Conditions List display appears.
2
Press the F6 key to select menu page 1/4.
3
Press the F3 key to select Equipment.
4
Press the F6 key to select menu page 3/4.
5
Press the F4 key to select Limit Value.
Select Except Bal’d 3-P for the limit value of equipment other than balanced three-
phase.
Select Balanced 3-P for the limit value of balanced three-phase equipment.
Select Spec Bal’d 3-P for the limit value of balanced three-phase equipment with
specified conditions.
Select Except Bal’d 3-P for the limit value of the single-phase part of hybrid equipment.
Select Bal’d 3-P for the limit value of the three-phase part of hybrid equipment.
6
Set OUTPUT of the AC power supply to OFF.
7
Ensure the impedance of the AC power supply conforms to the standard
requirements.
To satisfy the standard requirements, the impedance or the AC power supply may need
to be replaced.
8
Set OUTPUT of the AC power supply to ON.
WARNING
• This work has a risk of electric shock. For the AC power supply used for the
measurement circuit, be sure to disconnect the power cord from the outlet, turn off
the switch on the switchboard to which the power cord is connected, and turn off the
POWER switch.