Summary
Preface
P. 6
Chapter 2
P. 17
Technical data
Chapter 5
P. 76
Reception, storage
and installation
Chapter 4
P. 54
General information
Chapter 3
P. 47
Application notes
Chapter 6
P. 115
Options
Chapter 7
P. 129
Preventive maintenance
Chapter 1
P. 15
Overview
and installation diagram
Answer Drives 1000
89
5
5.5 REACTORS
5.5.1 INPUT REACTORS
The line reactor protects the drive against network transients and
complies with the requirements of the standard IEEE 587. The reactor
causes a voltage drop proportional to the supply current and the
inductance value.
Select a reactor to have a voltage drop equal to 2÷5 % of the rated input
voltage (when the drive is leading the total rated current).
Function of the inlet reactor:
• Reduces the effective current of the drive capacitor bank
• Improves the power factor
• Reduces annoying stops caused by spikes on the line
• Reduces the harmonic content of the input current
• Protects the drive against transient network
• Helps to suppress disturbances in radio frequency
• Protects the drive against the network imbalances and single-phase
operating conditions
The input reactor absorbs the disturbances on the power supply line that may
otherwise damage or block the drive or other sensitive devices and reduces
the harmonic content of the current generated by the drive helping to comply
with IEEE-519, 1993 GUIDELINES for the limitation of harmonics.
Sizes IIIN, IVN, VN, VIN are fitted with an internal line reactor, for all other
sizes provide a reactor between the power supply network
and the drive if:
1. a thyristor drive or other drives are operating on the same line.
2. power factor correction capacitors are connected on the same line.
3. the imbalance of supply voltage exceeds 3%.
5.5.2 OUTPUT REACTOR
The output reactors are necessary to compensate the capacitive leakage
current to the ground, as well as to reduce the voltage gradient on the
motor, they, together with the ferrite cores, help to mitigate the RFI
phenomenon. The output reactor codes are reported in Table 5.5.1.
Limit the motor cables length so as not to exceed a 3÷5 % voltage drop at
rated current.
In case of motors in parallel it is necessary to consider the sum of the
length of the various cables.
The codes of the input and output reactors are shown in Table 5.5.1.
5.5 REACTORS - 5.5.1 - 5.5.2
4.
Summary of Contents for AD1A008FBBNH
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