INSTRUCTION MANUAL
EZA11K Series
TDK-Lambda
<Page>
7. Battery Protection
The converter will restrict the current for avoid the over-charge and over-discharge when battery voltage reach to the
setting value if battery protection is enabled
（
See illustration below
）
.
If the battery internal impedance is large please set the larger release voltage deviation to avoid being affected by
the battery internal impedance.
Due to the effect of measurement accuracy, the converter might be charging or discharging with minute current.
Please set the over-voltage protection and under-voltage protection to the appropriate values. Also, please use the
protective function of battery together.
8. Required Pre-Charged Voltage
The converter is necessary the pre-charged voltage at battery side and grid side
（
See illustration below
）
.
The converter cannot startup when the pre-charged voltage is not enough.
9/24
Generation
(Charge)
Regeneration
(Discharge)
Release Warning of Pre Full Battery Volt
Warning of Pre Full Battery Volt
Over Charging Protection Volt
(Target Battery Voltage)
Condition
Bit of Pre Full Battery signal
(via RS485)
1
0
t
Vbat
Battery Over Charging Protection Timing Chart
Regeneration
(Discharge)
Generation
(Charge)
Release Warning of Pre Empty Battery Volt
Warning of Pre Empty Battery Volt
Over Discharging Protection Volt
Condition
Bit of Pre Empty Battery signal
(via RS485)
1
0
t
Vbat
Battery Over Discharging Protection Timing Chart
220
240
260
280
300
320
340
360
380
400
420
130
150
170
190
210
230
250
270
290
310
330
144
230
330
243
284
410
306
316
Operatable Range
Required Pre-Charged Voltage
HVDC (V)
LV
DC
(V
)
