Chapter 3 Commissioning 15
NetSure 731 A41 Subrack Power System User Manual
Chapter 3 Commissioning
The controllers can be used in the power system are M221S
、
M222S , M225S and M830B. The detail instructions of
the controllers please refer to the user manuals. This section introduces commissioning after installation. During
installation test, the corresponding safety rules should be adhered to. The system has been tested before out of the
factory, user doesn't need to test on site.
3.1 Installation Check and Startup
Before the test, inform the chief manufacturer representative. Only trained electrical engineer can maintain and
operate this equipment. In operation, the installation personnel are not allowed to wear conductive objects such as
watches, bracelets, bangles and rings.
During operation, parts of this equipment carry hazardous voltage. Misoperation may result in severe or fatal injuries
and property damage. Before the test, check the equipment to ensure the proper earthing. Installation check must be
done before testing. Then the batteries can be charged for the first time.
Make sure that the AC input MCBs, battery MCBs and load MCBs are switched off. Make sure that all the devices are
properly installed.
Installation check
OK
Comments
Check all the fuse and cables. Are the models correct?
Check the busbar connections, input and output cable connection, and connection between the power
system and the system grounding.
Check if the number and connections of the batteries are correct. Check the polarity of the battery string
with a voltmeter.
Make sure all the communication cables and alarm cables are connected to the controller module. Check
that the temperature sensor, if any, has been installed.
Startup preparations
OK
Comments
Make sure that all the MCB are switched off and all the fuses are removed.
Measure the AC input voltage. Make sure the input voltage is within the allowable range.
Umin
＝
V
Check that communication and alarm cables are connected to the signal transfer board.
Check that the temperature sensor, if any, has been installed.
Check that the battery string circuit is not closed.
Connect the disconnected batteries to the battery string circuit.
Make sure that the MCB disconnected to the battery cables are switched off. Check the battery signal
cables connection and MCB cables connection.
Measure with a voltmeter across the connection points of each battery and make sure that the polarity is
right. For a lead-acid battery with 24 cells, the voltmeter should read 2.0 ~ 2.1V/cell or 48 ~ 51V/battery. If
the voltage of certain cell is lower than 2.0V, that cell must be replaced.
Umin
＝
V
Check with an ohmmeter that there is no short circuit between the positive & negative distribution bus bars,
or between the positive & negative battery poles (Note: Pull out all modules before the check and restore
them after the check).
Startup
OK
Comments
Switch on the system AC input MCB. Insert one rectifier. The green LED on the rectifier will be on and the
fan will start running after a certain delay. The controller module will show that the power supply voltage is
53.5V( when it used for outdoor, the output voltage is 54V).
Check the system voltage and busbar polarity with a voltmeter. The voltage difference between the
measured value and displayed value should be less than
±
0.2V.
Start and stop each rectifier of the system by inserting and unplugging the rectifier. Check their output
voltages.