Precautions For Operation/Selection; Precautions For Use Of The Inverter; Power Supply; Setting - Mitsubishi Electric FR-D700 Manual

Precautions for Operation/Selection

Precautions for use of the inverter

Safety Precautions
To operate the inverter correctly and safely, be sure to read the
"instruction manual" before starting operation.
This product has not been designed or manufactured for use
with any equipment or system operated under life-threatening
conditions.
Please contact our sales office when you are considering using
this product in special applications such as passenger mobile,
medical, aerospace, nuclear, power or undersea relay
equipment or system.
Although this product is manufactured under strict quality
control, safety devices should be installed when a serious
accident or loss is expected by a failure of this product.
The load used should be a three-phase induction motor only.
Operation
A magnetic contactor (MC) provided on the input side should
not be used to make frequent starts and stops. It could cause
the inverter to fail.
However, at this time, the motor cannot be brought to a sudden
stop. Hence, provide a mechanical stopping/holding mechanism
for the machine/equipment which requires an emergency stop.
It will take time for the capacitor to discharge after shutoff of the
inverter power supply.
inspection, wait for at least 10 minutes after the power supply
has been switched off, and check to make sure that there are no
residual voltage using a tester or the like.
Wiring
Application of power to the output terminals (U, V, W) of the
inverter will damage the inverter. Therefore, fully check the
wiring and sequence to ensure that wiring is correct, etc. before
powering on.
The terminals P/+, PR, P1, N/- are provided for connection of a
dedicated option. Connect only a dedicated option. Do not short
the frequency setting power supply terminal 10 and common
terminal 5 or the terminal PC and terminal SD.

Power supply

When the inverter is connected
under a large-capacity power
transformer (500kVA or more
transformer) or when a power
capacitor is to be switched over,
an excessive peak current may
flow in the power input circuit,
damaging the inverter.
To prevent this, always install an optional AC reactor (FR-HAL).
When connecting a single-phase 100V power input model to a
power transformer (50kVA or more), install an AC reactor (FR-
HAL) so that the performance is more reliable.
If a surge voltage occurs in the power supply system, this surge
energy may flow into the inverter, causing the inverter to display
overvoltage protection (E.OV ) and come to an inverter trip. To
prevent this, always install an optional AC reactor (FR-HAL).
27
When accessing the inverter for
1500
Range
Power
requiring
supply
installation
1000
system
of the reactor
capacity
(kVA)
500
0
Wiring length (m) 10
Installation
Avoid hostile environment where oil mist, fluff, dust particles,
etc. are suspended in the air, and install the inverter in a clean
place or put it in an ingress-protected "enclosed" enclosure.
When placing the inverter in an enclosure, determine the
cooling system and panel dimensions so that the surrounding
air temperature of the inverter is within the permissible value.
(refer to page 7 for the specified value)
Do not install the inverter on wood or other combustible material
as it will be hot partly.
Install the inverter in the vertical orientation.

Setting

The inverter can be operated as fast as a maximum of 400Hz by
parameter setting. Therefore, incorrect setting can cause a
danger. Set the upper limit using the maximum frequency limit
setting function.
A setting higher than the initial value of DC injection brake
operation voltage or operation time can cause motor overheat
(electronic thermal relay error).
Do not set Pr. 70 Special regenerative brake duty except for using
the optional brake resistor. This function is used to protect the
brake resistor from overheating. Do not set the value exceeding
permissible duty of the brake resistor.