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HLP-C
+
Inverters
XI. Selection of Peripheral Devices and Disposition
(1) Options
Description Functions
NFB or Ground
fault interrupter
for wire
connection
Protect the wiring of the inverter. Be sure
to connect a breaker to the power supply
line. Please select a ground fault circuit
interrupter against high-order harmonics.
Electromagnetic
contactor
In order to prevent the braking resistor from
burning out, please add an electromagnetic
contactor and connect a surge absorber to the
coil when using it.
Surge absorber
Absorb the switching surge current from the
electromagnetic contactor and control relays.
Isulating
transformer
Its function of isolating the input and output
of the inverter is effective to reduce the
interference to other electric devices.
DC reactor
I mprove t he i nput powe rf act or of t he
inverter.
AC reactor
Improve the input powerfactor of the inverter
and prevent the shock of surge voltage.
Braking resistor,
brtaking unit
Consume the regenerating energy of motor
and shorten the deceleration time.
⑴
Leakage switch
There is earth static capacity inside of the inverter and the
motor as well asthe input and output leads. Due to higher carrier
frequency of the inverter the inverter has higher earth leakage
current, especially for serial inverters of large capacity. When
using a leakage switch it may sometimes result in the errous
action of the protective circuit. So when using a leakage switch
attention shoud be paid to its selection and the proper reduction
of carrier frequency and shortening the leads, etc.
⑵
AC reactor
An AC reactor can constrict the high-order harmonic of input
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