Extending The Voltage; Series Connections; Extending The Voltage Range - Agilent Technologies E3631A User Manual

Chapter 7 Tutorial

Extending the Voltage

Extending the Voltage
The power supply may be able to provide voltages greater than its rated maximum
outputs if the power-line voltage is at or above its nominal value. Operation can be
extended up to 3% over the rated output without damage to the power supply, but
performance can not be guaranteed to meet specifications in this region. If the power-
line voltage is maintained in the upper end of the input voltage range, the power supply
will probably operate within its specifications. The power supply is more likely to
stay within specifications if only one of the voltage or current outputs is exceeded.

Series Connections

Series operation of two or more power supplies can be accomplished up to the output
isolation rating (240 Vdc) of any one supply to obtain a higher voltage than that
available from a single supply. Series connected power supplies can be operated with
one load across both power supplies or with a separate load for each power supply.
The power supply has a reverse polarity diode connected across the output terminals
so that if operated in series with other power supplies, damage will not occur if the
load is short-circuited or if one power supply is turned on separately from its series
partners.
When series connection is used, the output voltage is the sum of the voltages of the
individual power supplies. The current is the current of any one power supply. Each
of the individual power supplies must be adjusted in order to obtain the total output
voltage.
In the Agilent E3631A the two 25V supplies can be operated in series to obtain
one 0 - 50V supply. The power supply can be put in "Track" mode and then the output
will be twice that shown on the front panel. The current will be that of either the +
25V supply or the -25V supply.
152