Installation Of A Reactor - Mitsubishi Electric FR-F806-E Hardware Instruction Manual

Installation of a reactor

• Determining if a countermeasure is required
A countermeasure for harmonics is required if the following condition is satisfied: outgoing harmonic current > maximum
value per 1 kW contract power  contract power
• Harmonic suppression techniques
No. Item
Reactor installation
1
(FR-HAL)
High power factor
2
converter (FR-HC2)
Installation of power
3 factor improving
capacitor
Transformer multi-phase
4
operation
Passive filter
5
(AC filter)
6 Active filter
3.3
Installation of a reactor
When the inverter is connected near a large-capacity power transformer (1000 kVA or more) or when a power factor
correction capacitor is to be switched over, an excessive peak current may flow in the power input circuit, damaging the
converter circuit. To prevent this, always install an optional AC reactor (FR-HAL).
MCCB
Power
supply
68
PRECAUTIONS FOR USE OF THE INVERTER
Because a DC reactor is built in on the DC side of this product, outgoing harmonic current can be
suppressed. By installing an AC reactor (FR-HAL) on the AC side of the inverter, the outgoing harmonic
current suppression performance can be improved.
This converter trims the current waveform to be a sine waveform by switching the rectifier circuit
(converter module) with transistors. Doing so suppresses the generated harmonic amount significantly.
Connect it to the DC area of an inverter. Use the high power factor converter (FR-HC2) with the
accessories that come as standard.
When used with a reactor connected in series, the power factor improving correction capacitor can
absorb harmonic currents.
Use two transformers with a phase angle difference of 30˚ as in
effect corresponding to 12 pulses, reducing low-degree harmonic currents.
A capacitor and a reactor are used together to reduce impedances at specific frequencies. Harmonic
currents are expected to be absorbed greatly by using this technique.
This filter detects the current in a circuit generating a harmonic current and generates a harmonic current
equivalent to a difference between that current and a fundamental wave current to suppress the
harmonic current at the detection point. Harmonic currents are expected to be absorbed greatly by using
this technique.
AC reactor
Inverter
(FR-HAL)
MC
X
R
R/L1 U
Y
S
S/L2 V
T Z
W
T/L3
Description
-∆ and ∆-∆ combinations to provide an
(kVA)
5300
5000
Capacities requiring
installation of
4000
AC reactor
3000
M
2000
1000
110165 247 330 420
Inverter capacity
550 kVA