Mitsubishi FR-E500 Series Instruction Manual page 48

Table 2 Conversion Factors for FR-E500 Series
Class
3-phase bridge
3
(Capacitor-smoothed)
5 Self-exciting 3-phase bridge
Table 3 Equivalent Capacity Limits
Received Power Voltage
6.6kV
22/33 kV
66kV or more
Table 4 Harmonic Contents (Values at the fundamental current of 100%)
Reactor
Not used
Used (AC side)
Used (DC side)
Used (AC, DC sides)
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 : 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 received
• Operation ratio: Operation ratio = actual load factor × operation time ratio
• Harmonic content: Found in Table 4.
Circuit Type
Without reactor
With reactor (AC side)
With reactor (DC side)
With reactors (AC, DC sides) K34 = 1.4
When high power factor
converter is used
Reference Capacity
50 kVA
300 kVA
2000 kVA
5th 7th 11th
65 41 8.5
38 14.5 7.4
30 13 8.4
28 9.1 7.2
power voltage) × operation ratio × harmonic content
during 30 minutes
35
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INSTALLATION AND WIRING
Conversion Factor (Ki)
K31 = 3.4
K32 = 1.8
K33 = 1.8
K5 = 0
13th 17th 19th
7.7 4.3
3.4 3.2
5.0 4.7
4.1 3.2
*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.
23rd 25th
3.1 2.6 1.8
1.9 1.7 1.3
3.2 3.0 2.2
2.4 1.6 1.4