Yaskawa J7 Drive - Manual (Page 13)

1-1
The J7 drive is a pulse width modulated general purpose AC drive which generates an adjustable
voltage/frequency, three phase output for speed control of most conventional squirrel cage induction
motors. Automatic stall prevention and voltage boost prevents nuisance tripping during load or line
side transient conditions. The Drive will not induce any voltage line notching distortion back to the
utility line and maintains a displacement power factor of not less than 0.98 throughout its speed
range.
When properly installed, operated and maintained, the Drive will provide a lifetime of service. It is
mandatory that the person who operates, inspects, or maintains this equipment thoroughly read and
understand this manual before proceeding.
The Drive is thoroughly tested at the factory. After unpacking, verify the part numbers with the
purchase order (invoice). Any damages or shortages evident when the equipment is received must
be reported immediately to the commercial carrier who transported the equipment. Assistance, if
required, is available from your sales representative.
If the Drive will be stored after receiving, keep it in its original packaging and store according to
storage temperature specifications in Appendix 2.
Location of the Drive is important to achieve proper performance and normal operating life. The
Drive should be installed in an area where it will be protected from:
• Direct sunlight, rain or moisture.
• Corrosive gases or liquids.
• Vibration, airborne dust or metallic particles.
When preparing to mount the Drive, lift it by its base, never by the front cover. For effective cooling,
as well as proper maintenance, the Drive must be installed on a flat, non-flammable vertical surface
(wall or panel) using four mounting screws. There MUST be a MINIMUM 3.9 in. clearance above
and below the Drive to allow air flow over the heat sink fins. A minimum 1.2 in. clearance is required
on each side on the Drive.
Make sure air entering the Drive is below 122°F (50°C) by adding a fan or other cooling device, if
needed. See environmental specifications in Appendix 2.
Section 1. RECEIVING AND INSTALLATION
1.1 GENERAL
1.2 RECEIVING
1.3 PHYSICAL INSTALLATION