Njoy Balder 1500, User Manual

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17: 

External output isolation transformer connection

Parameter 2: Allow or disallow 

external output isolation transformer 

connection.

ENA:

 If selected, it’s allowed to 

connect to an external output isolation 

transformer.

DIS:

 If selected, it’s not allowed to 

connect to external output isolation 

transformer. (Default)

18: 

Display setting for autonomy time

Parameter 2: Set up the display setting 

for autonomy time 

EAT:

 If EAT is selected, it will display the 

remaining autonomy time. (Default)

RAT:

 If RAT is selected, it will show 

accumulated autonomy time so far. 

19: 

Acceptable input voltage range setting 

Parameter 2: Set the acceptable high 

voltage point and acceptable low 

voltage point for input voltage range by 

pressing the Down key or Up key.

HLS:

 Input high voltage point

280/290/300:

 setting the high voltage 

point in parameter 2. (Default: 300Vac)

LLS:

 Bypass low voltage point

110/120/130/140/150/160:

 setting 

the low voltage point in parameter 2. 

(Default: 110Vac)

00: 

Exit setting

Exit the setting mode.

Operating Mode Description

5.6

Operating 

mode

Description

LCD display 

Online mode

When the input voltage is 

within acceptable range, 

UPS will provide pure 

and stable AC power to 

output. The UPS will also 

charge the battery in 

online mode.

ECO mode

Energy saving mode: 

When the input voltage is 

within voltage regulation 

range, UPS will bypass 

voltage to output for 

energy saving. The UPS 

will also charge the 

battery at ECO mode.

Frequency 

Converter 

mode

When input frequency 

is within 40 Hz to 70 

Hz, the UPS can be set 

at a constant output 

frequency, 50 Hz or 60 Hz. 

The UPS will still charge 

battery under this mode. 

The capacity of the UPS 

should be derated to 80% 

when Frequency Converter 

mode is enabled.

Battery 

mode

When the input voltage 

is beyond the acceptable 

range or power failure, 

the UPS will backup 

power from battery and 

alarm is sounding every 5 

seconds.

Bypass 

mode

When input voltage is 

within acceptable range 

but UPS is overload, UPS 

will enter bypass mode 

or bypass mode can be 

set by front panel. Alarm 

is sounding every 10 

seconds.

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