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Appendix 7 - 5
MDS-D2/DH2 Series Instruction Manual
Appendix 7.1 Higher Harmonic Suppression Measure Guidelines
(3) Higher harmonic current flow calculation form
A higher harmonic current flow calculation form is shown below for reference.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Current upper limit value (mA)
Order
(Higher harmonic current flow upper limit per contracted kW x contracted electricity)
Higher harmonic current flow upper limit value
Necessity of measures
Total
In all other cases, separate measures must be taken
If there is a facility that lowers the higher harmonics in the factory, or when suppression
measures are implemented, proceed to Calculation Form (Part 2)
If the current flow > current flow upper limit value at each order, then
6-pulse equivalent capacity total Po
Step 2
If P, > 50kVA (6kV incoming power), 300kVA (22, 33kV incoming power), 2000kVA (66kV
or higher incoming power), proceed to Step 2. (Step 2 does not need to be completed in
all other cases.)
If the device's circuit type classification No. is 10, complete the application shown in
<Format 3>.
Refer to the reference and indicate the circuit type classification No., etc.
Indicate the details of the higher harmonic generating device.
Step 1
<Instructions for completing form>
5th-
order
(%)
Device's
maximum
operation
rate
[a x Pi] (mA)
Rated current
value for
incoming
power voltage
conversion
[Ki x Pi]
(kVA)
6-pulse
calculation
coefficient
Ki
Circuit
type clas-
sification
No.
Pi (kVA)
Total
capacity
Qty. of
devices
(kVA)
Rated
capacity
TypeMakerDevice name
Higher harmonic
generating device
Step 1: Details of higher harmonic generating device
Incoming
power
voltage
Contracted
electricity
kV kW
Higher harmonic current flow per order
Step 2: Calculation of higher harmonic current flow rate
Date of acceptance
Application No.
Date of application
<Form 1>
Industry
User
name
Higher harmonic generating device's higher harmonic current flow calculation form (Part 1)
6-pulse
equivalent
capacity
7th-
order
11th-
order
13th-
order
17th-
order
19th-
order
23rd-
order
25th-
order
5th-
order
7th-
order
11th-
order
13th-
order
17th-
order
19th-
order
23rd-
order
25th-
order