Veichi AC100-T3-1R5G Manual page 78

AC80C HIGH-PERFORMANCE VC INVERTER MANUAL
Capacitance of inverter;
Carrier frequency;
Motor cable type and wire length;
EMI/RFI filter
To protect human body and the inverter, please choose residual current circuit breaker that can use AC/DC power and
capable of handling high frequency leakage current. There should be one residual current circuit breaker with more than
200mA sensitive current for every frequency inverter. If the frequency inverter outputs different wave, the high frequency
leakage current might be higher due to the difference of the frequency inverter. At this case, please take the following
measures:
Improve the sensitive current of the residual current circuit breaker;
Reduce the carrier frequency of the inverter.
Electromagnetic Contactor
③
Electromagnetic contactor is a peripheral set to separate power and inverter connection. When inverter protective
function is acting or carrying out emergency stop operation, the main loop power can be cut by peripheral controller.
Please do not connect the electromagnetic switch or electromagnetic contactor to the output circuit. Otherwise, the
inverter may be damaged. If the power recovers after instant stop, if preventing the inverter from auto-restart is needed,
please install electromagnetic contactor for control at the input side.
AC Input Reactor and DC Reactor
④
To restrain current sharp change and high harmonic current, AC input reactor and DC reactor should be used. At the
same time the power factor at the input side can also be improved. In the following cases, AC input reactor or DC
reactor must be used (use both will bring better effect):
Need to restrain ultra harmonics current and improve power side factor;
Need to switch input phase capacitance;
When frequency inverter is connected to large capacitance power transformer (600kVA above);
Silicon-controlled converters such as DC motor driver are connected to the same power system.
If user has higher requirement on other harmonic restraint, please connect the external DC reactor. Before connecting
the external DC reactor, please dismantle the short connector between the terminals P1 and (+).
Surge Suppressor
⑤
Surge suppressor is divided into winding surge suppressor and main loop surge suppressor according to the use
position. Please choose the right suppressor on different occasion. The aim of installing surge suppressor is to restrain
the surge voltage brought by switch components such as inductive load around the frequency inverter (electromagnetic
contactor, electromagnetic relay, electromagnetic valve, electromagnetic winding, electromagnetic detent). Do not
connect the surge suppressor to the output side of the frequency inverter. Otherwise, the frequency inverter might be
damaged.
Input Side Noise Filter
⑥
Since the rectifier bridge of the inverter is uncontrolled rectifier. And the input current is discontinuous impulse current.
The harmonic current noise signal may bring impact on the surrounding machines (radio, phone, noncontact switch,
sensor) when it flows to power wire from the inner inverter. At this case, we suggest to install input side noise filter to
lighten the noise into the power wire. Besides, it can also reduce noise from the power wire into the frequency inverter.
Please use the specified noise filter for the frequency inverter and the connection wire between the filter
and the inverter should be as short as possible.
Output Side Noise Filter
⑦
Since the frequency inverter outputs square wave with high-speed peak voltage switch. So there is high-speed dv/dt
convert on the output cables that will produce a lot of radio interference and inductive interference signal. By installing
noise filter at the output side, the impact can be relieved. Please do not install static condenser and the noise filter onto
the output circuit. Otherwise, there is danger of damage to the inverter.
PERIPHERAL EQUIPMENTS AND OPTIONS
75