User's Manual

6
6888882V04
 Imbalance Protection
When a fault, power failure or other type of failure prevents normal operation of one or
more of its internal amplification modules, the 1KW amplifier is automatically bypassed.
PS Unit
The PS unit is a custom design that includes 6 JWS-600-48 standard power supply modules
manufactured by Lambda Inc. (see manufacturer’s manual for complete information on these
modules), contained in a compact chassis suitable for installation in 19” racks. The individual
modules automatically share the load, without any special alignments. The assembled PS unit
has been assigned a custom-design manufacturer number (YM-02-670B).
The PS unit operates on 110/220 VAC, 50/60 Hz. The AC input voltage range is automatically
switched between 110 and 220 VAC, and therefore the equipment can be used in the United
States of America as well as in other countries. Internal cooling fans enable operation over a
wide range of temperatures. The PS unit includes two independent power supply subsystems,
each providing +45V to two of the four amplification modules in the 1KW amplifier. Protection
circuits monitor each output, and provide indications on front panel indicators in case the output
voltages deviate by more than 25% from the nominal value; if an output voltage increases
beyond the maximum limit, the corresponding power supply subsystem is turned off, to prevent
damage to the 1KW amplifier.