The measure system built in the HP-COMPACT takes into account the battery voltage, the discharge and charge current as well as the undulation of the voltage. If the battery and the HP-COMPACT are used according to their technical data, the battery state of charge is displayed accurately. In the following cases of use the display can diverge:
−Battery charge or discharge with too high currents
−Battery cable cross section too small
−Battery connections badly tightened or corroded
−Charge of the battery with external battery charger
−Discharge of the battery with users not connected to the HP-COMPACT
−Work with defective or sulphated batteries
This means that the display can, within few minutes during the charge, commute from 25% to 75% or during the discharge, to the opposite direction.
As many of the working cases mentioned above often occur, the measure system of the HP-COMPACT takes into account, during the charge, only the peaks of the voltage undulation. As a consequence, the battery voltage at the start of the absorption stage, measured by a voltmeter will appear deeper. By decrease of the charge current the voltage will reach the exact values.
For safety reasons, you must get the recommended charge voltage and charge currents from your battery supplier. The voltage levels and charge characteristics can be changed through Programming. The instruction for programming of battery charger is in the section „Programming“ (Chap. 5.3). The correct charging is mandatory for a safe function and a long-life of the battery.
The battery charger are described by the graphic in chap. 4.6.1.
4.7The Transfer system
When an AC voltage is at the input AC IN of the HP-COMPACT, the LED 1 AC IN is lit. When this voltage matches the lowest adjusted value set by the Turning Knob 23 TRANSFER, and the frequency is between 44Hz and 65Hz, this voltage is switched directly to the battery charger and to the output AC OUT. The LED 7 TRANSFER is lit. The inverter is switched off and the battery charger switched on. This process is automatic, unless the charger mode or the transfer mode is disabled (see Chap. 5.5).
The maximum current of the Transfer switch is 30A (50A for HPC-8000-48). That means through this system, appliances up to a maximum of al 6900 Watt at 230V (11500W for HPC 8000-48) can be operated. When the Battery Charger is working, part of this power is used for charging according to the power sharing system.
The Transfer system is protected against overload with a circuit breaker on the AC Input side of the HP-COMPACT. If the system has been overloaded, the button/pin of the fuse will pop out. To put the automatic safety system back in to operating you must push this pin back.
Note: in the Inverter operation, The HP-COMPACT generates a true sinusoidal and quartz stabilized output voltage. However if the HP-COMPACT is supplied from a grid or a generator and the transfer contact is active, then you have at the output AC OUT the same voltage as that at the input. This voltage can not be modified by the HP-
COMPACT !
