Vertiv™ NetSure™ HVT F02 CK1 Power System User Manual
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4.3
Routine Maintenance
Routine maintenance of power equipment mainly involves management of the equipment room environment and inquiry of the
equipment running status. Inquiry of the equipment running status is a part of the routine logs, generally including the following
items:
1. The inquiry of the operating status of the power supply equipment can be completed through the controller. The status
parameters that can be inquired include mains voltage, mains frequency, DC output voltage, boost charge/float charge status,
charge/discharge current, total load current, voltage and current of each rectifier, historical alarm record, etc. For inquiry methods,
refer to
M822E Controller User Manual
.
2. Streamlined logs of the power supply status. The power equipment can measure mains voltage and record mains failure alarms,
but cannot complete statistical work. To conduct statistical analysis of the operating status of the power grid, there shall be a
detailed streamlined log of the status of the power net. In general, the status of the power grid shall be recorded once about every
2 hours, including the voltage and current of each phase of the power grid, the start and recovery time of mains failure, and the
startup time and break time of the generator, etc.
3. Streamlined logs of the DC power supply status. The requirements for the streamlined logs of the DC power supply status are
similar to those for the streamlined logs of the AC power supply status. Log items include DC output voltage, current of main
loads, charge/discharge voltage and current, total load current, etc.
4. Faults maintenance. Overhaul and maintenance of other equipment shall be conducted in accordance with the requirements
and methods provided by the manufacturer. But, during the routine maintenance, be sure to write down the fault causes and the
maintenance results in the “equipment calendar”. An equipment calendar shall be kept for each piece of equipment in the
equipment room.
4.4
Handling Controller Alarms
The alarms are classified in four levels: critical alarm, major alarm, observation alarm and no alarm.
Critical alarm, major alarm: these two types of alarms have strong impacts on the system performance. Whenever these alarms
are generated, users are supposed to handle them immediately. The alarm indicators will be on and audible indication will be
given.
Observation: when this type of alarm is raised, the system maintains normal output for a while. If the alarm occurs during watch
time, it should be handled immediately. If the alarm occurs during non- watch- time, handle it during watch time. The alarm
indicators will be on when observation alarm occurs.
No alarm: if alarms are set as ‘no alarm’ by the users, when these alarms occur, no visible or audible indication will be generated,
and the system works normally.
The handling methods of normal alarms are given in Table 4.4.
Table 4.4
System setting parameter description
No.
Alarm
Handling Method
1
Mains Failure
If the failure does not last long, the battery will power the load. If the cause is unknown or the failure lasts too long, a diesel
generator is needed. Before using the generator power to supply the power system, it is suggested to run the generator five
minutes to minimize the impact on the power system
2
AC Voltage High
Check if the AC over-voltage value is too low. If yes, change the value.
A mild over-voltage does not affect the system operation. However, the rectifier will stop operation when the mains voltage is
more than 530V. If the mains voltage is above the AC over-voltage value, the mains grid should be improved
3
AC Voltage Low
Check if the AC Under- voltage point is too high. If yes, change the value.
When the mains voltage is lower than 304V, the output power of the rectifiers will be derated. And if lower than 260V, the
rectifiers will stop working. If the mains voltage is under the AC under-voltage value, the mains grid should be improved
4
SPD failure
Check the SPD condition. If the SPD is damaged, replace it
