Calex 32000 Serie Guide De L'opérateur

Calex 32000 Series
Operators Guide
installation and
application information
These open frame power supplies are intended for
installation by suitably qualified personnel in
enclosures that provide safety protection and as such
are not user accessible.
Chassis models with suffix A to D are convection
cooled and provision must be made for free air to flow
round the unit. Chassis models with Suffix E must be
fan cooled if it is intended to operate continuously at,
or near, full power. It is recommended that a fan of
>=94 CFM (44.7 I/s) be mounted <=150 mm from the
transformer, blowing through the coils, and that a
clearance on the opposite side of a similar distance is
allowed. It is not abnormal for chassis temperatures to
exceed 80°C. Worst case condition temperatures in
excess of 100°C may be found.
Additional cooling will improve the long term reliability
normally achieved by mounting on a large metal
surface, or if this is not possible by fan cooling.
AC CONNECTION AND FUSING
The 32000 SERIES has four AC input ranges:
100/120/220/240 V AC + 10% - 12%. See input
selection table. Inputs must be fused with a slow-
blow (T) HBC type fuse. Units are factory set for
220/240 V AC input. For additional safety the
transformer primary is protected from thermal
overloads by a non-resettable thermal switch. This
Calex Electronics Limited Tel: +44 (0)1525 373178/853800 Fax: +44 (0)1525 851319 Online: http://www.calex.co.uk
switch will permanently break if a transformer
temperature of 130°C is exceeded. NOTE: Pin 1 on
the transformer primary MUST NOT be used to
by-pass this switch. Suitable fuse types to comply
with safety approvals
LlTTELFUSE Series 215.
DISCONNECT DEVICES
For PERMANENTLY CONNECTED EQUIPMENT, a
readily accessible disconnect device shall be
incorporated external to the equipment.
For PLUGGABLE EQUIPMENT, the socket-outlet
shall be installed near the equipment and shall be
easily accessible.
OVERLOAD PROTECTION
All models are fitted with foldback current limiting.
This feature is factory set at 120% of I
the risk of erroneous tripping due to line spikes etc. It
is not recommended to run the power supply at
greater than I continuously. The foldback current
max
limit is user adjustable over a wide range to cater for
individual requirements. The minimum adjustment
range is from 0.5 I to 1.2 I
max
adjusting the "I LIM" potentiometer.
OVERVOLTAGE PROTECTION (OVP)
An overvoltage protection circuit protects sensitive
loads against excessive voltage such as in TTL logic.
Overvoltage protection is implemented by means of
a crowbar. The trip point set usually at 115% - 135%
Issue A - Feb 10
WICKMANN 19181,
to minimise
max
. This is obtained by
max
1