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Chapter 3 Testing 13
NetSure 531 AC1 Power Supply System User Manual
Chapter 3 Testing
This chapter introduces procedures of testing. The corresponding safety rules shall be adhered to in the test.
3.1 Installation Check And Startup
Before the test, inform the chief manufacturer representative. Only the 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 can 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 (LLVD MCBs and BLVD MCBs) are switched off.
Make sure that all the devices are properly installed.
Check the following item one by one:
Installation check
Check item OK Comments
Check all the MCBs and cables. Are their models correct?

Check the input and output cable connection, and system grounding

Check if the number and connections of the batteries are correct. Check the polarity of the battery string
with a voltmeter
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Check all the connections. Make sure that the connections are firmly and reliably

Make sure all the communication cables and alarm cables are connected to thecontroller. Check that the
temperature sensor, if any, has been installed

Startup preparations
Check item OK Comments
Make sure that all the MCBs are switched off

Measure the AC input voltage. Make sure the input voltage is within the allowable range

Umin=___V
Check that at least one shorting copper bar disconnects to the battery string before finishing the battery
installation, to prevent short circuit

Connect the disconnected batteries to the battery string circuit

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
busbars, or between the positive & negative battery poles
(Note: Pull out all rectifiers before the check, and restore them after the check)

Startup
Check item OK Comments
Switch on the system AC input MCB. The controller should display the correct voltage and current

The green LED on the rectifier will be on and the fan will start running after a certain delay. The controller
will show that the output voltage is 53.5V

Check the system voltage and busbar polarity with a voltmeter. The voltage difference between the
measured value and displayed value should be less than ±0.3V

Start and stop each rectifier of the system by inserting and unplugging the rectifier. Check their output
voltages of the rectifiers
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