Mitsubishi Electric FR-A700 Series, Техническое руководство

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Calculation sheet for outgoing harmonic currents from harmonic generating equipment (Part 1)
* Refer to Technical note No.28 for format-3.
Calculation sheet for outgoing harmonic currents from harmonic generating equipment (Part 2)
<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.
6-Pulse
Equivalent
Capacity
[Ki
×
Pi]
(kVA)
6-Pulse
Conver-
sion
Factor
Ki
Circuit
Class
No.
Total
Capacity
Pi
(kVA)
Qty
Rated
Capacity
(kVA)
Model Manufacturer Equipment name No.
Harmonic Generating Equipment
STEP 1 HARMONIC GENERATING EQUIPMENT PARTICULARS STEP 2 GENERATED HARMONIC CURRENT CALCULATION
Rated Current Value
Converted from
Received Power
Voltage
[a
×
Pi]
(mA)
Max.
Equipment
Operation
Ratio
(%)
5th 7th 11th 13th 17th 19th 23rd 25th
Outgoing Harmonic Current by Degrees (mA)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Sum of 6-pulse equivalent capacities Po
Total
Judgment of technique
requirement
Customer Name
Business
Category Received
Power Voltage
kV
Contract
Power
kV
Date of
Acceptance
Application No.
Date of
Application
<Format 1>
5th 7th 11th 13th 17th 19th 23rd 25th Degree
Maximum current value (mA)
Maximum Outgoing Harmonic Current Value
(Maximum outgoing harmonic value per kW contract
×
contract power)
Customer Name
Business
Category Received
Power Voltage
kV
Contract
Power
kV
Date of
Acceptance
Application No.
Date of
Application
<Format 2>
5th 7th 11th 13th 17th 19th 23rd 25th Degree
Judgment of suppression technique requirement
Maximum outgoing harmonic current value (mA)
Outgoing harmonic current after
consideration of reduction effect (mA)
Outgoing harmonic current in
calculation sheet (part 1) (mA)
In-Plant Single-Wire Connection Diagram Detailed Calculation of Outgoing Harmonic Currents
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. 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.
*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.