Elektro-Automatik PS 8000 E 3U Series, Руководство по эксплуатации

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46
EN
Date: 06-05-2014
Instruction Manual
PS 8000 E 3U Series
7.7 Remote sense operation
Remote sense operation is used to compensate voltage drops
of the conductors between the power supply and the load.
Because the compensation is limited to a certain level, it is
recommended to match the cross section of the conductors to
the output current and thus minimise the voltage drop.
The sense input is located on the rear, at terminal
Sense ,
where the sense conductors are connected to the load with
correct polarity. The power supply will detect the external sense
automatically and compensate the output voltage by the actual
voltage at the load instead of the output. The output voltage
will be raised by the value of the voltage drop between power
supply and load.
Maximum compensation: see technical specifications, will vary
from model to model.
Also see figure 9 below.
7.8 Mains undervoltage or overvoltage
The units require two or three phases of a three-phase supply
with 400V phase conductor voltage and tolerate max. +15%.
This results in an input voltage range of 340...460V AC. Within
this range, the units can be operated without any restrictions
regarding power. Input voltages below 340V AC are considered
as supply undervoltage and will store the last condition, as well
as switch the power output off. Same happens at overvoltage
above 460V AC.
New since firmware 6.01 : Over- or undervoltage in the AC
input, as well as errors in the input section of the device are
indicated as „power fail“ alarm on the device. This is done in the
display with „PF“, via pin 6 „OT/PF“ of the analogue interface
or via the internal alarm buffer, which can be read out with one
of the optional, digital interface cards.
Attention!
Permanent input undervoltage or overvoltage must be
avoided!
Operating the device
Figure 9. Wiring remote sense
7.9 Connecting different types of loads
Different types of loads, such as ohmic loads (lamp, resistor),
electronic loads or inductive loads (motor) behave differently
and can retroact to the power supply. For example, motors
can induce a countervoltage which may cause the overvoltage
protection of the power supply to shut off the output.
Electronic loads have regulator circuits for voltage, current and
power that can counteract to the ones of the power supply and
may result in increased output ripple or other, unwanted side
effects. Ohmic loads are almost 100% neutral. It is recommen-
ded to consider the load situation when planning applications.