Wayne Kerr AP10030, Руководство пользователя и обслуживания

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Wayne Kerr AP 1kW Power Supplies • Issue 2 13
REAR
FRONT
Alternative connection
for 115V operation
115V
Neutral O/P
Connection for 230V operation
Fig. 5.2 Changing Input Voltage
7. Amend the legend on the back panel to indicate the new voltage setting.
8. Finally, replace the covers and items previously removed.
5.2 Mains Connection
The unit is provided with a mains lead capable of handling the input current for both
115V and 230V operation. The free end of the lead should be connected via a suitable
plug (or, preferably, wired directly) to the local mains supply. The colour code employed
is as follows: Brown to Live, Blue to Neutral, Green/Yellow to Ground Safety Earth.
AP series power supplies are classified as Safety Class 1 equipment and it is imperative
that the mains earth lead (Green/Yellow) is connected to a known integrity earth
otherwise the chassis may float to a dangerous potential.
Due to the power supply incorporating an RFI filter, some earth leakage current (3 to
4mA) will flow. This may cause ‘nuisance’ tripping of the more sensitive type of earth
leakage circuit breakers.
The power supplies are intended for use with mains wiring capable of supplying the rated
input current without undue voltage drop. (See specification for maximum input
currents). The protective circuits (fuse or circuit breaker) must be capable of handling the
peak ‘in rush’ current without blowing or tripping. Unsatisfactory operation of the unit
may be due to low mains voltage caused by high a.c. line impedance. Check as stated in
Section 6.5.
5.3 Location
AP power supplies are intended for use either on the bench or in a rack. The units are fan
cooled and care must be taken not to restrict the air intake at the front or the exhausts at
the rear, top and bottom of the unit. If the power supply is rack mounted the exhaust must
not be subject to a static back pressure.
5.4 Rack Mounting
All models can be rack mounted in a standard 19” rack by using the two rack mounting
‘ears’ and the screws supplied. To fit these ‘ears’, carefully prise out the insert in the
outer face of both front handles (see diagrams) and store for future use. Fit each ear into
the recess formed by the removal of the insert and secure using the screws provided (M4
x 10 CSK). It is important that some provision be made to support the rear of the unit
when using the rack mounting ears.