B1.4
T807/808 General Information
M800-00
31/08/96
Copyright TEL
1.2
Specifications
1.2.1
Introduction
The performance figures given are minimum figures, unless otherwise indicated, for
equipment operating at standard room temperature (+22°C to +28°C).
Where applicable, the test methods used to obtain the following performance figures are
those described in the EIA specification. However, there are several parameters for
which performance according to the CEPT specification is given.
Details of test methods and the conditions which apply for Type Approval testing in all
countries can be obtained from Tait Electronics Ltd.
Three different issues of PCB are covered in this manual, as classified by the last two
digits of the IPN. Throughout this manual, differences in the specification or operation
of the various issues of power supply are identified using these digits.
1.2.2
General
Basic Power Supply Concept
.. switched mode technology pulse
width modulation
Switching Frequency
.. 166kHz typical
Overtemperature Protection
.. shuts down when main transformer
temperature rises above 105°C
Cooling:
T807
.. convection
T808
.. convection and forced air (fan)
Power On/Off Switch & LEDs:
On: Switching Enabled
.. green "On" LED glows
Off: Switching Disabled
.. red "Standby" LED glows
Other LEDs on
Issues 05 and 07 only
:
Overcurrent
.. red “Overload” LED glows
Overvoltage
.. green “On” and red “Overload” LEDs
flash on and off
Note:
To remove the mains voltage from the PCB, disconnect the IEC mains con-
nector.
Efficiency:
T807
.. 80%, 10-15A load typical
T808
.. 80%, 15-25A load typical
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