CSPP Capacitor Charging Unit Operation Manual
CSP-CSPP-8000/2
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Page
26
of
59
2. Circuits and Descriptions
The following pages give brief circuit descriptions for major items inside the CSP Unit itself. The
descriptions should be read in conjunction with the diagrams (Schematics).
System Overview
The control board handles operation of the complete system and can be considered to be
electrically the „
heart
‟ of the unit. It controls the operation of the charger with various control lines,
as well as switching the storage capacitors in and out of circuit; driving the triggering module for
the thyristor and accepting safety information from interlock switches such as the controls on the
front panel connector. As a back-
up to this board, a separate „layer‟ of control electronics - relays
from an additional isolated supply - are used to disable the capacitor charger supply.
The CSP-
P Unit is designed for minimal operator intervention. The term, „No user serviceable
parts‟, does really apply!
Access to the inside of the unit is initially through the top cover. Ensure that the AC supply is
disconnected - remove the AC plug from the front panel and then remove the lid securing screws.
Note that one of these is longer than the rest. It is this longer screw which controls the lid interlock
switch mounted on the left-hand side plate. There are quite a number of screws for the lid. This is
a feature recommended by UK HSE (Health and Safety Executive) to deter easy access to the
unit! It also is part of the electrical shielding of the system.
Once the lid is removed, access to the high voltage parts is achieved. We remind the reader that
we cannot be responsible for any errors or omissions by the manufacturer or any errors by the
operator after the top cover has been removed.
