Rugged Environment
AC-DC Converters >100Watt
T Series
500 Watt AC-DC Converters
T Series
Input to output isolation
Single output
• Universal AC input range
• DC output voltage for 24 and 48 V loads
• Battery charging for 24, 36, 48 V batteries with re-
mote temperature control
• Telecom rectifier applications
• Immune to transients and disturbances according to
VDE 160 and IEC/EN 61000-4-2,-3,-4,-5,-6
• 4000 V AC input to output electric strength test
• Very high efficiency, typically 93%
• Power factor >0.96, harmonics <IEC/EN 61000-3-2,
low RFI
• No inrush current, hot plug-in capability
• High power density, 210 W/dm3, rugged mechanical
design
• Very compact 19" cassette (28 TE, 3 U, 160 mm),
111
4.4"
3 U
Safety according to IEC/EN 60950
LGA
141
5.6"
168
28 TE
6.6"
C
Summary
The latter types can be integrated into systems where the
output voltage is backed-up by batteries. The float charge
of the battery can be set by a cell voltage selector switch
according to the battery type used. Moreover these units
feature a temperature sensor input to improve the life ex-
pectancy of the battery.
The T series of converters are electrically isolated AC-DC
converters with an output power of up to 550 W. For higher
power requirements several units may be connected in
parallel.
The input of the T units is ideally adapted to the mains: Full
power factor correction, no inrush current, low RFI level and
high transient and surge immunity are key design features.
The T units behave similar to a resistive load.
The rectifier types suit for DC-bus applications at constant
voltage. As the output voltage is SELV, even electrically non
isolated switching regulators such as the Melcher PSR
types may be connected to the T output.
The L-input provides a universal AC-input range from
85...255 V AC. It is the preferred type for 230 V mains,
whereas the U-input range is optimized for 110/120 V
mains. The output delivers an electrically isolated Safety
Extra Low Voltage (SELV) and is short-circuit and no-load
proof. Depending on the type, two output characteristics
are available, intended either for rectifier applications or for
battery charging purposes.
The T 1701 types are especially optimized to build distrib-
uted power systems together with the Melcher CQ-series
DC-DC converters as the signalling capabilities of both
families are matched. Distributed power systems have as
one advantage less power loss over load lines and fewer
regulation problems.
Melcher offers also backplanes for fast and simple set-up of
19" rack systems with T units (see chapter: Back Planes).
Page
Table of Contents
Page
Functional Features ....................................................... 16
Auxilliary Functions ........................................................ 21
Electromagnetic Compatibility (EMC) ............................ 25
Immunity to Environmental Conditions........................... 26
Environmental Conditions .............................................. 27
Mechanical Data ............................................................ 28
Safety and Installation Instructions ................................ 30
Description of Options.................................................... 33
Accessories.................................................................... 33
Summary.......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Key .......................................................................... 2
Sensor Type Key .............................................................. 3
Functional Description...................................................... 4
Electrical Input Data ......................................................... 5
Electrical Output Data of the Rectifier Version ................. 7
Electrical Output Data of Battery Charger Version......... 10
Control Features of the Battery Charger Version ........... 12
Temperature Sensors..................................................... 15
Edition 4/4.99
1/33
MELCHER
The Power Partners.
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