Installation Of The Inverter And Enclosure Design - Mitsubishi Electric 800 Series Instruction Manual

Installation of the inverter and enclosure design

2.3
Installation of the inverter and enclosure
design
When designing or manufacturing an inverter enclosure, determine the structure, size, and device layout of the enclosure by
fully considering the conditions such as heat generation of the contained devices and the operating environment. An inverter
unit uses many semiconductor devices. To ensure higher reliability and long period of operation, operate the inverter in the
ambient environment that completely satisfies the equipment specifications.
2.3.1
Inverter installation environment
The following table lists the standard specifications of the inverter installation environment. Using the inverter in an
environment that does not satisfy the conditions deteriorates the performance, shortens the life, and causes a failure. Refer to
the following points, and take adequate measures.
Standard environmental specifications of the inverter
Item
FR-A860-00090 or lower
Surrounding
air temperature FR-A860-00170 to 01080

FR-A860-01440 or higher
Ambient humidity
Storage temperature
Atmosphere
Altitude
Vibration

Temperature applicable for a short time, e.g. in transit.

For the installation at an altitude above 1000 m, consider a 3% reduction in the rated current per 500 m increase in altitude.
2

2.9 m/s or less for the FR-A860-02890 or higher.

Surrounding air temperature is a temperature measured at a measurement position in an enclosure.
Ambient temperature is a temperature outside an enclosure.

The FR-A860-00680 or higher inverter is intended for installation in an enclosure.
Temperature
For the FR-A860-00090 or lower, the permissible surrounding air temperature of the inverter is between -10°C and +40°C
(LD, ND, or HD rating) or between -10°C and +30°C (SLD rating). For the FR-A860-00170 to 01080, the permissible
surrounding air temperature of the inverter is between -10°C and +40°C. For the FR-A860-01440 or higher, the permissible
surrounding air temperature of the inverter is between -10°C and +50°C (ND or LD rating) or between -10°C and +40°C (SLD
or HD rating). Always operate the inverter within this temperature range. Operation outside this range will considerably
shorten the service lives of the semiconductors, parts, capacitors and others. Take the following measures to keep the
surrounding air temperature of the inverter within the specified range.
(a) Measures against high temperature
• Use a forced ventilation system or similar cooling system. (Refer to
• Install the enclosure in an air-conditioned electric chamber.
• Block direct sunlight.
• Provide a shield or similar plate to avoid direct exposure to the radiated heat and wind of a heat source.
• Ventilate the area around the enclosure well.
(b) Measures against low temperature
• Provide a space heater in the enclosure.
• Do not power OFF the inverter. (Keep the start signal of the inverter OFF.)
24
INSTALLATION AND WIRING
-10°C to +40°C (non-freezing) (LD/ND/HD rating)
-10°C to +30°C (non-freezing) (SLD rating)
-10°C to +40°C (non-freezing)
-10°C to +50°C (non-freezing) (LD/ND rating)
-10°C to +40°C (non-freezing) (SLD/HD rating)
95% RH or less (non-condensing)
-20 to +65°C

Indoors (free from corrosive gas, flammable gas, oil mist, dust and dirt)
Maximum 2500 m

2
5.9 m/s or less at 10 to 55 Hz (directions of X, Y, Z axes)

Description
Enclosure
5 cm
Measurement
position
page 27.)

Measurement
position
Inverter
5 cm
5 cm