APC VS 100 User Manual

Magnum VS –48 Vdc User’s Manual 

                                     

  Page 17 

8.  Check that anti-oxidation compound is properly applied. 
9.  Visually inspect each cell for: 

a. Cracks. 
b. Case leaks. 
c. Post-seal leaks. 
d.  Pressure relief valve leaks (VRLA only). 
e.  Case swelling (VRLA only). 

10. Check the torque of all battery inter- cell connector in accordance with the battery 

manufacturer’s specifications. 

 

 
Initial Set-up 
 

1.  Remove all rectifiers. 
2.  Disconnect battery by removing a link in each string or opening the battery disconnects. 
3.  Check that battery voltage does not appear on the system bus. 
4.  Disconnect all loads. 

 
AC Power Up 
 

 

WARNING:  The dc power plant is supplied from a nominal high voltage ac 
voltage source.  Keep the ac input enclosure cover in place when the system 
is operational or energized 

 

1.  Verify that all of the circuit breaker positions are labeled to the corresponding rectifier 

correctly. 

2.  Insert all rectifiers. 
3.  Turn all rectifier circuit breakers on. 
4.  Each rectifier should have green Input Healthy and Output Healthy LEDs illuminated. 

 
NOTE: When ac power is initially applied, there is a 60-second period during which no alarms 
are reported. 

 
DC Power Up: 
 

1.  Verify with a voltmeter that the dc voltage is within 0.1 Vdc of the System Voltage 
2.  Adjust battery float voltage to negative 49 Vdc.  
3.  Verify System Low Voltage Alarm. 
4.  Adjust battery float voltage to negative 57 Vdc. 
5.  Verify System High Voltage Alarm. 
6.  Restore the battery float voltage to negative 54.00 Vdc or desired voltage.