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To check Load MCB fail, connect a load, but with no load turned on. Then
switch the breaker to its off position and turn on some load (any amount will
do). This will cause the alarm to occur as the load side to the circuit will be
taken to system common voltage. Turn off the load, and then return the
breaker to its on position.
Load MCB Fail (urgent)
Tests with Batteries
•
Turn off Battery Breaker/s
•
Connect battery/batteries
•
Check the correct Battery Capacity (Ahrs) has been entered (EM4x Web UI
Battery>Battery Settings). This is the total capacity, so for example 100Ahr
strings in parallel, this should be 200.
•
Go to EM4x Web UI Battery>Battery Settings>Battery Charge Current Limit.
Check Battery Charge Current Limit (BCL) is set to desired level (usually 0.25C
(25%)). This means that for a single 100Ahr battery, the BCL will be 25A, or if
two 100Ahr batteries are connected in parallel, the BCL will be 50A.
•
Connect load (but turn off).
•
Check V
•
Turn on Battery Breaker/s
Check Battery current is positive if charging
For systems fitted with Battery Monitoring (BCM) cards:
Go to EM4x Web UI Battery>Battery Status. Check cell voltages are approximately the
same, at about 2.25V (or 13.5V for 12V monoblocs).
If any are out by a large amount, then check the BCM sense wiring is correct.
Set load to required level (e.g., 30A),
Initiate a Battery Test.
Click the Start Battery Test button on EM4x Web UI Charge page.
Check Battery Current is negative (discharging). Note the overview
data in the header of the Web UI.
Check Battery Current
After several minutes, or until the battery voltage has
dropped
the top of the Web UI Charge page.
During this time the Battery Condition Monitor (if fitted) is logging.
Battery Current Limit (BCL)
Current Limit level (usually 0.25C
Settings>Calculated Charge Current Limit for Amp value.
BCL functions
_______%
NewMar Power System Manual
Model: COMMANDER II AND COMMANDER II+
is set to 54.0V. (Web UI Control>Float Voltage)
f
below approx. 47V, click the Stop button at
Check that the battery recharge current is limited to the Battery
, (25%)). See Web UI Battery
10
Note: as the BCL is based on fine voltage control of
the system bus, the BCL make take one or two
/
Meter:______
minutes to "settle", i.e., you
/
,
10
/
/
Check operates
/
/
__________ A
/
M-CMDRII 063022
Page 28 of 43
Version 1.0
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