Installation Of The Converter Unit And Enclosure Design - Mitsubishi Electric FR-CC2-P Instruction Manual

Installation of the converter unit and enclosure design

2.3
Installation of the converter unit and
enclosure design
When designing or manufacturing an enclosure to contain the converter unit, 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. A converter unit uses many semiconductor devices. To ensure higher reliability and long period of operation,
operate the converter unit in the ambient environment that completely satisfies the equipment specifications.
2.3.1
Converter unit installation environment
The following table lists the standard specifications of the converter unit installation environment. Using the converter unit 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 converter unit
Item
Surrounding air temperature
Surrounding air 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 (up to 2500 m), consider a 3% reduction in the rated current per altitude increase of 500 m.
Temperature
The permissible surrounding air temperature of the converter unit is between -10°C and +50°C. Always operate the converter
unit 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
converter unit 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 converter unit.
(c) Sudden temperature changes
• Select an installation place where temperature does not change suddenly.
• Avoid installing the inverter near the air outlet of an air conditioner.
• If temperature changes are caused by opening/closing of a door, install the inverter away from the door.
Humidity
Operate the converter unit within the ambient air humidity of usually 45 to 95%. Too high humidity will pose problems of
reduced insulation and metal corrosion. On the other hand, too low humidity may cause a spatial electrical breakdown. The
insulation distance defined in JEM1103 "Control Equipment Insulator" is humidity of 45 to 85%.
20
INSTALLATION AND WIRING
-10 to +50°C (non-freezing)
95% RH or less (non-condensing)
-20 to +65°C

Indoors (free from corrosive gas, flammable gas, oil mist, dust and dirt)
1,000 m or lower

2
2.9 m/s or less at 10 to 55 Hz (directions of X, Y, Z axes)
Description
Converter
unit
5 cm
Measurement
position
page 22.)
Measurement
position
5 cm
5 cm