Calex 32000 Series Benutzerhandbuch

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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