APS 3A Series, Руководство по эксплуатации

Страница: 49 / 56

3A SERIES OPERATION MANUAL
Entire Contents Copyright

2014 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
3A SERIES AC & DC LOAD OPERATION MANUAL Page 49 of 56
9 Multiple Load Operation Modes
9.1 Overview
When the maximum power level of a single 3A Series electronic load module is insufficient to
handle an application or a multi-phase AC load is required, the user can combine two or more
load modules in either parallel or multi-phase mode of operation.
9.1.1 Parallel Mode
In parallel mode, the total current is shared by the number of load modules used. This type of
connection will expand the power and current of the electronic load.
Figure 9-1: Parallel Load Connection
9.1.2 Multi-Phase Mode
Multi-phase AC test applications can be quite common at higher power levels or even at low
power levels for avionics and shipboard AC power supplies. This requires one AC load per phase.
Since each load synchronizes its current to the phase voltage it detects at its input,
Note: External Sync mode is not recommended for multi-phase applications unless individual
sync signals can be provided for each phase voltage. Do not use a single external sync signal to
drive all loads in a multi-phase application.
There are two possible configurations for 3 phase loads:
Wye Connection: Also known as star connection or four wire plus ground. This requires a
Common or Neutral connection on the AC power source.
Delta Connection:
AC loads are connected between line-to-line voltages.