Installation; Operation - Mitsubishi Electric FR-E700EX Manual

Precautions for Operation/Selection
Precautions for use of the drive unit
Safety Precautions
 To operate the drive unit 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.
 Do not use the drive unit for a load other than the dedicated
sensorless PM motor.

Operation

 A magnetic contactor (MC) provided on the input side should not be
used to make frequent starts and stops. It could cause the drive unit
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
drive unit power supply. When accessing the drive unit for
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 drive unit. 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. Do not connect anything other than a dedicated
option and DC power supply. 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 drive unit is connected
under a large-capacity
transformer (500kVA
transformer) or when a power
capacitor is to be switched over, an
excessive peak current may flow in
the power input circuit, damaging
the drive unit.
To prevent this, always install an
optional AC reactor (FR-HAL).
 If a surge voltage occurs in the power supply system, this surge
energy may flow into the drive unit, causing the drive unit to display
overvoltage protection (E.OV) and come to a drive unit trip. To
prevent this, always install an optional AC reactor (FR-HAL).
45
power
or more
1500
Range
Power
requiring
supply

installation

system
1000
of the reactor
capacity
(kVA)
500
0
Wiring length (m)
Installation
 Avoid hostile environment where oil mist, fluff, dust particles, etc. are
suspended in the air, and install the drive unit in a clean place or put
it in an ingress-protected "enclosed" enclosure.
When placing the drive unit in an enclosure, determine the cooling
system and enclosure dimensions so that the surrounding air
temperature of the drive unit is within the permissible value. (Refer to
page 8 for the specified value)
 Do not install the drive unit on wood or other flammable material as it
will be hot partly.
 Install the drive unit in the vertical orientation.
Setting
 The motor can be operated as fast as a maximum of 3000r/min by
parameter setting. Therefore, incorrect setting can cause a danger.
Set the upper limit using the maximum speed 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.
Precautions for selection
Acceleration/deceleration times
 The acceleration/deceleration time of the motor depends on the
motor-generated torque, load torque and moment of inertia of the
load.
 When the torque limit function is activated during acceleration/
deceleration, increase the acceleration/deceleration time as the
actual time may become longer.
 To decrease the deceleration time, it is necessary to add optional
brake resistor MRS type or FR-ABR (for the 0.4K or higher), the
brake unit (FR-BU2), power regeneration common converter (FR-
CV), or a similar device to absorb braking energy.
Power transfer mechanism
gear, belt, chain, etc.)
 When an oil-lubricated gear box, speed change/reduction gear or
similar device is used in the power transfer system, note that
continuous operation at low speed only may deteriorate oil
lubrication, causing seizure.
Instructions for overload operation
10
 When performing operation of frequent start/stop of the drive unit,
rise/fall in the temperature of the transistor element of the drive unit
will repeat due to a repeated flow of large current, shortening the life
from thermal fatigue. Since thermal fatigue is related to the amount
of current, the life can be increased by reducing current at locked
condition, starting current, etc. Decreasing current may increase the
life. However, decreasing current will result in insufficient torque and
the drive unit may not start. Therefore, choose the drive unit which
has enough allowance for current.
(reduction