Advertisement
Precautions for Operation/Selection
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.
Do not use the F700P inverter with a load other than a three-phase induction motor or a dedicated IPM motor.
Do not connect an IPM motor under the general-purpose motor control settings (initial settings). Do not use a general-purpose motor in the IPM
motor control settings. Doing so will cause a failure.
When using a dedicated IPM motor, the precautions for the use of the dedicated IPM motor must be observed as well.
Operation
A magnetic contactor (MC) provided on the primary 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. When accessing the inverter 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 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.
When disconnecting a wire from a control circuit terminal, push the
open/close button all the way down with a flathead screwdriver, and
pull out the wire. Pulling out the wire forcefully without pushing the
open/close button all the way down may damage the terminal block.
Power supply
When the inverter is connected near
a large-capacity power transformer
(500kVA or more) or when a power
capacitor is to be switched over, an
excessive peak current may flow in
the power input circuit, damaging
the converter circuit.
If this is the case, always install a
Filterpack or optional AC reactor
(FR-HAL).
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).
If this is the case, install a Filterpack or optional AC reactor (FR-
HAL).
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
enclosure dimensions so that the ambient temperature of the
inverter is within the permissible value. (refer to page 8 for the
specified value)
Do not install the inverter on wood or other combustible material as it
will be hot locally.
Install the inverter in the vertical orientation.
67
Precautions for use of the inverter
1500
Capacities
Power
requiring
supply
installation of
1000
system
AC reactor
capacity
(kVA)
500
0
Wiring length (m)
10
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 trip).
Do not set Pr.70 Special regenerative brake duty except for using an
optional brake resistor. Note that this function is used for over heat
protection of brake resistors. Take caution not to set a value that
exceeds the permissible brake resistor duty in this parameter.
Precautions for the use of a dedicated
IPM motor
When using the dedicated IPM motor (MM-EFS, MM-EF),
the following precautions must be observed as well.
SAFETY INSTRUCTIONS
Do not use an IPM motor for an application where the motor is
driven by the load and runs at a speed higher than the maximum
motor speed.
Combination of Motor and Inverter
Use the same dedicated IPM motor capacity as the inverter capacity.
Only one IPM motor can be connected to an inverter.
A dedicated IPM motor cannot be driven by the commercial power
supply.
Do not use a synchronized or induction-synchronized motor, that is
not a dedicated IPM motor.
Advertisement
