General Caution - Hitachi J300 Series Instruction Manual

A CAUTION
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. EFFECTS OF DISTRIBUTOR LINES ON INVERTERS
In the cases below involving a general_purpose
invefier' a large peak current flows
on the power supply side, someiimes destroying the convefier module Where
such
sit.rations are foreseen, or the paired equipment must be highly reliable' install
an AC
reactor between the power supply and the inverter'
(A) The unbalance factor of the power supply is 37o or higher'
(B) The power suPply capacity is at least l0 times greater than the inverter capac ity
(and the power supply capacity' 500 kVA or more)
(C) Abrupt power supply cbanges are expected'
Examples:
(1) Several inverters are interconnected with a short bus'
(2) A thyristor convefier and an inverter are interconnected with a short bus'
(3) An installed Phase advance capacitor opens and closes'
tn cases (A), (B) or (C), we recommend installing an AC reactor of 37o (in-a voltage
drcp at rated cunent) with respect to the supply voltage on the power supply
side-
a When occDrring an EEPROM efior ( fiffi
)' be sure to conlirm the setting
value again.
a When setting b contact to the reverse command ([REV] terminal), the inverter
state automatically. Do not set to b contacL
In all the illustrations in this miulual, covers and safety devices iue occasionally
removed to describe the details. When the product is operated, male sure that the
covers and safety devices are placed as they were specified originally and operate
it according to the instruction manual.
GENERAL CAUTION
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