Mitsubishi Electric FR-S520E Series Instruction Manual page 33

Table 4 Harmonic Contents (Values of the fundamental current is 100%)
Reactor
Not used
Used (AC side)
Three-phase
bridge
Used (DC side) or
(capacitor
with filter pack
smoothed)
Used (AC, DC
sides)
Single-phase Without reactor
bridge
With reactor (AC
(capacitor
side) *
smoothed)
* The harmonic contents for "single-phase bridge/with reactor" in the table 4 are values when
the reactor value is 20%. Since a 20% reactor is large and considered to be not practical,
harmonic contents when a 5% reactor is used is written in the technical data JEM-TR201 of
the Japan Electric Machine Industry Association and this value is recommended for
calculation for the actual practice.
1) Calculation of equivalent capacity (P0) of harmonic generating equipment
The "equivalent capacity" is the capacity of a 6-pulse converter converted from the
capacity of consumer's harmonic generating equipment and is calculated with the
following equation. If the sum of equivalent capacities is higher than the limit in
Table 3, harmonics must be calculated with the following procedure:
P0=Σ (Ki × Pi) [kVA]
Ki: Conversion factor (refer to Table 2)
Pi: Input rated capacity of harmonic
generating equipment* [kVA]
i: Number indicating the conversion
circuit type
2) Calculation of outgoing harmonic current
Outgoing harmonic current = fundamental wave current (value converterd from
• Operation ratio: Operation ratio = actual load factor × operation time ratio during
• Harmonic content: Found in Table 4.
5th 7th 11th
65 41 8.5
38 14.5 7.4
30 13 8.4
28 9.1 7.2
50 24 5.1
6.0 3.9 1.6
* Input rated capacity: Determined by
the capacity of the applied motor and
found in Table 5. It should be noted
that the rated capacity used here is
used to calculate a generated
harmonic amount and is different
from the power supply capacity
required for actual inverter drive.
received power voltage) × operation ratio × harmonic
content
30 minutes
23
Main circuit terminals
13th 17th 19th
7.7 4.3 3.1
3.4 3.2 1.9
5.0 4.7 3.2
4.1 3.2 2.4
4.0 1.5 1.4
1.2 0.6 0.1
23rd 25th
2.6 1.8
1.7 1.3
3.0 2.2
1.6 1.4
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