Mitsubishi Electric FREQROL HC Instruction Manual page 11

(1) Application of the harmonic suppression guideline for specific consumers
Table 2 Conversion Factors for FR-A500 Series
Classification
3
5
Table 3 Equivalent Capacity Limits
Received Power
Voltage
6.6kV
22/23kV
66kV or more
Table 4 Harmonic Content (Values at the fundamental current of 100%)
Reactor
Not used
Used (AC side)
Used (DC side)
Used (AC, DC sides)
New installation/addition/renewal of
harmonic generating equipment
Calculation of equivalent capacity sum
Not more than
reference capacity
Sum of equivalent capacities
Over reference capacity
Calculation of outgoing harmonic
current higher than maximum
Harmonic suppression technique is
Three-phase bridge
(Capacitor smoothed)
Self-excited three-phase bridge
Reference
Capacity
50kVA
300kVA
2000kVA
5th 7th
65 41
38 14.5
30 13
28 9.1
current
Is outgoing harmonic
Over maximum value
value?
Not more than
maximum value
not required.
Circuit Type
Without reactor
With reactor (on AC side)
With reactor (on DC side)
Without reactor (on AC/DC side)
When high power factor converter is used
11th 13th 17th
8.5 7.7 4.3
7.4 3.4 3.2
8.4 5.0 4.7
7.2 4.1 3.2
- 2 -
Harmonic suppression
technique is required.
Conversion Factor
K31=3.4
K32=1.8
K33=1.8
K34=1.4
K5=0
19th 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