Magnetek GPD 333, Technical Manual

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Section 1 INSTALLATION
1.1 GENERAL.
The GPD 333 is a high performance
pulse width modulated design which generates a sine-coded,
adjustable voltage/frequency three phase output for complete
speed control of any conventional squirrel cage induction
motor. The GPD 333 can maintain a 150% current overload
capability for 60 seconds. The GPD 333 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
GPD 333 will provide a lifetime of service. It is mandatory that
the person who operates or maintains this equipment thor-
oughly read and understand this manual before proceeding.
1.2 RECEIVING.
The GPD 333 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 is available from your sales representative.
1.3 PHYSICAL INSTALLATION.
Location of the
GPD 333 (Figure 1-1) is important to achieve proper perfor-
mance and normal operating life. The unit 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.
For effective cooling as well as proper maintenance, the
GPD 333 must be installed vertically. There MUST be a
MINIMUM 4.0 inch clearance above and below, and a MINI-
MUM 1.18 inch clearance on each side.
For open type chassis, remove top cover and terminal cover.
When mounting units in an enclosure, make sure air entering
drive is below 113
°
F (45
°
C).
1
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