Calex Convel 32000 Serie Guía Del Operario

Convel 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 (44.7I/s) be mounted
<=150mm 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
bymounting 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 Vac + 10% -
12%. See input selection table. Inputs
must be fused with a slow-blow (T)
HBC type fuse. Units are factory set
for 220/240Vac input. For additional
safety the transformer primary is
protected from thermal overloads by a
non-resettable thermal switch. This
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 WICKMANN 19181
LlTTLEFUSE Series 215
OVERLOAD PROTECTION
All models are fitted with foldback
current limiting. This feature is factory
set at 120% of Imax to minimise the
risk of erroneous tripping due to line
spikes etc. It is not recommended to
run the power supply at greater than
Imax continuously. The foldback
current limit is user adjustable
over a wide range to cater for
Calex Electronics Limited Tel: +44 (0)1525 373178/853800 Fax: +44 (0)1525 851319 Online: http://www.calex.co.uk
individual requirements. The minimum
adjustment range is from 0.5 Imax to
1.2 Imax. This is obtained by
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% of the output voltage. The OVP
will rapidly short the output terminal to
reduce output voltage to a low value.
The foldback feature will prevent the
primary fuse from blowing an OVP
condition.
Noise from input line spikes or load
noise can cause the OVP to fire. To
minimise this problem the 32000
SERIES is equipped with OVP noise
filtering and reduced transformer
interwinding capacitance to minimise
input line susceptibility.
REMOTE SENSING
The remote sensing feature, included
in almost all Convel 32000 SERIES
power supplies, may be used to
compensate the voltage drop across
the load lines. Figure 2 outlines the
proper termination for a power
supply with remote sensing.
Load lines should be sized to prevent
a voltage drop less than 0.5V from the
output to the load. It is recommended
to use twisted or shielded pair for the
sense lines.
To prevent the power supply from
oscillation it is highly recommended to
bypass the load with a small AC
decoupling capacitor (0.1 to 10uF).
All Convel 32000 SERIES Power
Supplies have an open sense lead
protection to protect the load from an
overvoltage condition if the sense
leads are removed. There is no need
to strap the sense terminals if remote
sensing is not required.
COMMON-MODE LATCH UP
All 32000 SERIES dual power
supplies have incorporated a unique
anti-latch circuit to minimise common-
mode latch up.
Common-mode latch up occurs in
certain instances when one supply
comes up first and forces a reverse
bias condition on the second supply.
The second supply latches up in a
current limit condition.
EMI/RFI
Linear power supplies have inherently
low conducted and radiated noise
levels.
SAFETY SPECIFICATIONS
With the 32000 SERIES power
supplies field terminal spacing is
greater than 3.5 mm and creepage
spacing from terminal to other metal
is greater than 3.0mm, leakage
current is less than 5.0 µA and
minimum dielectric withstanding are
3750VAC input to chassis, 3750 VAC
input to output and 500VAC output to
chassis.
* The output voltage may be adjusted
over the range indicated using the V
adj potentiometer. The current rating
is unchanged over the entire output
voltage range
**±0.2% on 5V o/p line of the 32305A
only
*** Output current from 180 to 200V
falls linearly from 150mA to 125mA
Convel Série 32000
Guide de l'opérature
INFORMATIONS POUR
L'INSTALLATION ET LES
APPLICATIONS
Ces blocs d'alimentation à châssis
ouvert doivent être installés par un
personnel ayant une formation
adéquate, dans des coffrets offrant un
niveau de protection approprié et qui,
de ce fait, ne sont pas accessibles à
l'utilisateur.
Les modèles de châssis portant les
suffixes de A à D sont refroidis par
convection. Il faut donc prévoir un
passage d'air libre autour de l'unité.
Les modèles de châssis portant le
suffixe E doivent être refroidis à l'aide
d'un ventilateur si l'on a l'intention de
les faire fonctionner de façon continue
à pleine puissance, ou presque. Il est
recommandé qu'un ventilateur de
>=94 CFM (44,7 l/s) soit installé
<=150 mm du transformateur,
soufflant à travers les bobines, et
qu'une distance minimale
d'importance égale soit prévue du
côté opposé.
Il n'est pas anormal que la
température du châssis dépasse les
80°C. Dans le pire des cas, des
températures dépassant les 100°C