Mitsubishi Electric FR-A700 Technical Manual page 482

Calculation sheet for outgoing harmonic currents from harmonic generating equipment (Part 1)
Customer Name
STEP 1 HARMONIC GENERATING EQUIPMENT PARTICULARS
Harmonic Generating Equipment
No. Equipment name Manufacturer
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
<Entry Method>
Step 1
Complete the harmonic generating equipment particulars. Enter the circuit class number, etc. according to
data.
For the equipment whose circuit class number is 10, complete the application <Format 3>.
If Po > 50kVA (6kV power received), 300kVA (22, 33kV power received) or 2000kVA (66kV or more power
received), proceed to Step 2. (If not, Step 2 need not be completed.)
Step 2
When outgoing current > maximum outgoing current value for each degree:
If there is in-plant harmonic reduction equipment or suppression technique has been carried out, proceed to Calculation Sheet (Part 2).
If not, separate suppression technique will be required.
* Refer to Technical note No.28 for format-3.
Calculation sheet for outgoing harmonic currents from harmonic generating equipment (Part 2)
Customer Name
In-Plant Single-Wire Connection Diagram
*Note: When it is difficult to complete the in-plant single-wire connection diagram and the detailed calculation of outgoing harmonic currents in this format, separate data may be appended as explanatory information.
<Judgment of suppression technique requirement>
If (outgoing harmonic current after consideration of reduction effect) > (maximum outgoing harmonic current value) for each degree, an additional suppression technique will be required.
Business
Category
Rated Total
Capacity Capacity
Qty
Pi
Model
(kVA) (kVA)
Sum of 6-pulse equivalent capacities
Business
Category
Specify the installation position, specifications, electrical constants, etc. of
harmonic generating equipment, power receiving transformers, and
equipment and the like which reduce (branch) harmonic currents.
Received
kV
Power Voltage
STEP 2 GENERATED HARMONIC CURRENT CALCULATION
Rated Current Value
6-Pulse 6-Pulse
Converted from
Circuit Conver- Equivalent Equipment
Received Power
Class sion Capacity Operation
Voltage
[Ki × Pi]
No. Factor
[a × Pi]
Ki (kVA)
(mA)
Po
Total
Judgment of technique
requirement
Maximum Outgoing Harmonic Current Value
(Maximum outgoing harmonic value per kW contract × contract power)
Degree
Maximum current value
Received
kV
Power Voltage
Detailed Calculation of Outgoing Harmonic Currents
Outgoing harmonic current in
calculation sheet (part 1) (mA)
Outgoing harmonic current after
consideration of reduction effect (mA)
Maximum outgoing harmonic current value (mA)
Judgment of suppression technique requirement
516
Date of
Application
Application No.
Contract Date of
kV
Power Acceptance
Max.
Outgoing Harmonic Current by Degrees (mA)
Ratio
(%)
5th 7th 11th 13th 17th
5th 7th 11th 13th 17th
(mA)
Date of
Application
Application No.
Contract Date of
kV
Power Acceptance
In consideration of equipment for harmonic current reduction and a
suppression effect by branching, specifically describe the process of
calculating outgoing harmonic currents at the power receiving point.
Degree 5th 7th 11th 13th 17th
SELECTION
<Format 1>
19th 23rd 25th
19th 23rd 25th
<Format 2>
19th 23rd 25th