Toshiba Q-Flowsaver II - Manual (Page 9)

T O S H I B A
2.0 Safety in Installation and Operation
2.1 Installation Precautions
/!\ CAUTION
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Install in a secure and upright position in a well ventilated location where the
ambient temperature is between -10 deg C and 40 deg C (up to 50 deg C when
not enclosed in a cabinet). Do not allow direct sunlight to shine on the unit or
obstruct ventilating openings.
Allow a clearance space of 4 inches (10 cm) for the top and bottom and
2 inches (5 cm) on both sides. This space will insure adequate ventilation.
Avoid installation in areas where vibration, heat, humidity, dust, steel particles,
or sources of electrical noise are present.
Adequate working space should be provided for adjustment, inspection and
maintenance.
Adequate lighting should be available for troubleshooting and maintenance.
A noncombustible insulating floor or mat should be provided in the area
immediately surrounding the electrical system where maintenance is required.
Use separate metal conduits for routing the input power, output power,
and control circuits.
A
Always ground the unit to prevent electrical shock and to help reduce
electrical noise. A separate ground cable should be run inside of the
conduit with the input, output, and control power cables. The
metal of
the conduit is not an acceptable ground.
Connect three phase power of the correct voltage to input terminals LI, L2, L3
(R, S, T) and connect three phase power from output terminals T1, T2, T3
(U, V, W) to a motor of the correct voltage and type for the application. Size
the conductors in accordance with Article 310 of the National Electrical Code.
If conductors of a smaller than recommended size are used in parallel to share
current then the conductors should be kept together in as sets i.e. U1, VI, W1
in one conduit and U2, V2, W2 in another. National and local electrical codes
should be checked for possible cable derating factors if more than three power
conductors are run in the same conduit.
Install a molded case circuit breaker (MCCB) between the power source and the
inverter. Size the MCCB to clear the available fault current of the power source.
Installation of inverter systems should conform to the
National Electrical Code,
regulations of the
Occupational Safety and Health Administration,
all national
codes, and all regional or industry codes and standards.
If a secondary Magnetic Contactor (MC) is used between the inverter output
and the load, it should be interlocked so the ST-CC terminals are disconnected
before the output contactor is opened. If the output contactor is used for bypass
operation, it must also be interlocked so that commercial power is never applied
to the inverter output terminals (U,V,W).
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