3. Installation
Before using the power-supply HERCULES, a power cord (5-wire) has to be plugged in the Acinput
(TB1) of the backpanel of the power-supply. The power cord should at least support 3x15A or 3x25A
load. The three phases, neutral and earth have to be connected.
Caution: Operation without connected neutral causes a break down of the power supply unit.
The HERCULES supply is immediately operational after powering up, and a soft start time of approx.
3 sec.
If the power supply will be switched off under full load, it is necesarry to have a delay of
10sec. before switching on again.
The warm-up time, at room temperature, in order to reach the high stability specifications is
negligible.
The two sliding switches S1 and S2 must be positioned on the bottom side (see chap. 7.2b,
7.2f, 7.4b and 11a too.)
Note:
The outputs of the power source should not be connected to AC- sources, DC- sources with
reverse polarity or DC-sources with higher voltage than 1.2 x U
nominal
If such an operating mode is
inevitable (e.g. charging batteries, paralleling power sources or working with heavy inductive loads),
the customer must assure proper safety measures ( e.g. OR-ing diodes, fuses etc.).
4. Constant voltage mode with current limiting
This mode of operation is reached, when the LED-indicator 'CV' lights up. Because of the high stability
of HERCULES it is possible, to adjust accurately the output voltage to several decades. For this, an
adequate digital voltmeter should be used. The local adjustment is performed using the voltage control
knob 'VOLTAGE'.
The adjustment to the desired and limited current is achieved by short-circuiting the output and using
the current limiting control knob while reading the display.
5. Constant current mode with voltage limiting
This mode of operation is reached when the LED indicator 'CC' lights up. The height of the constant
current is locally adjusted using the current control knob 'CURRENT'. The lower limit for the constant
current operation is 100mA. It is important, to be careful, particularly when working with small output
currents, since the charging or discharging currents of the output capacitor affects the constant
current, depending on the charging condition of the output capacitor under dynamic loading condition.
The output voltage to be maximum limited is adjusted by using the voltage control knob and reading
the display.
Hercules 5000
Page
7
von
17
ISSUE
07/05
