MaxPower Corp Gamatronic Power+ M50 - Manuel (Page 148)

Gamatronic Electronic Industries Ltd.
132 POWER+ 3x208 V, User Guide, Release 2.3
8.15.9.1 First General Screen
A description of the various system parameters shown in screen 1 are listed below.
[3-second Esc > GENERAL]
ACV:120...ALM:242/185 TEMP. ALARM:45C
MODULES:07/02 C.LIM= off , T.C= 2.0mV
DCV:216...ALM:475/360/340
BATT...TEST:04/05/360/352...CAP: 0010 AH
Figure 288: General (Screen 1)
a. ACV: nominal value of the input/output ac voltage (220 for 2x32 batteries; 110 for
2x16 batteries).
b. ALM: input ac voltage alarm HIGH/LOW.
c. TEMP. ALARM: high temperature limit for an external temperature sensor.
d. MODULES: QUANTITY/REDUNDANCY: 07/02 in the screen means that 7 modules
are presented in the system, 2 modules are reserve (full load is 10 kVA*(7-2)=50 kVA
/ 40 kW).
e. C.LIM.=off (VALUE): battery current limit function is de-activated (off) or maximum
battery current value in Amps. If C.LIM is activated, the system must be equipped
with an optional battery current sensor.
f. T.C. = 2.0mV: negative temperature coefficient of the battery dc voltage in mV per °C
per battery cell. Nominal temperature is 25 °C. For dc nominal voltage 432 V ,
temperature 35 °C, 32 batteries of 6 cells, T.C.=2 mV, the voltage is 432- 2*6*32*(35-
25)~=428 V. NOTE. For most applications T.C. must be 0 (off).
g. DCV: Dc nominal voltage for both positive and negative battery sets. For 32 batteries
in the set DCV=432 V, for 16 batteries 216 V.
h. DCV …ALM: Dc voltage alarms HIGH/LOW/SHUTDOWN. SHUTDOWN alarm is dc
voltage value when the unit is stopped due to battery discharge.
i. BATT….TEST: PERIOD IN WEEKS/MAX.DURATION IN HOURS/ALARM
VOLTAGE/CHARGER DERATED VOLTAGE. In the screen: the test is performed
automatically once per 4 weeks, max. test duration is 5 Hours, if battery voltage drops
below 360 V alarm Battery Low is produced, and the chargers for the modules
continue to supply a voltage of 352 V to prevent shutdown if battery is faulty.
j. CAP: CAPACITY in Amp-Hours. Used to calculate estimated back-up time of the
system and battery test duration.