44 Chapter 7 Maintenance
NetSure 801 AG1 Power Supply System User Manual
No.
Item
Test standard
Test tools
Test method
7
Management
function
The calculation, storage and battery
auto-management functions performed
by the controller. The historical alarm
record can be queried, and the battery
auto-management function is testable
1. Storage function: simulate an alarm, the
controller will record the alarm information.
2. Battery auto-management: the battery
charge mode and charge current can be
adjusted and various protections can be
implemented through the moniotoring
module according to the data set by the
user
8
Internalconnection
The socket shall be well connected; the
cables shall be well laid out and fixed;
there shall be no cables that have been
squeezed out of shaped by metal
components; and there shall be no
partial overheat or aging of connection
cables
9
Vent duct and dust
deposit
There shall be no blockage or dust
deposit in the vent ducts of rectifier fans
or vent ducts in the cabinets
Hairbrushes,
leather
bellows, etch
Remove, clean and wash the guard
boards of the vent ducts and the fan;
replace them after they have been dried
10 DC cables
The permissible voltage drop determined
in circuit design is generally less than
0.5V (low impendance distribution)
Note down the maximum current flowing
through the cables, look up the sectional
area and wiring length of the cable in the
design plan, calculate the voltage drop and
check whether it meets the design
requirements
11
Configuration of
DC circuit breakers
The rated current of the DC circuit
breaker should not be more than twice of
the maximum load current. The rated
current of the circuit breaker in each
special equipment room should not more
than 1.5 times of the maximum load
current
Check the adaptability of the circuit
breakers according to the recorded
maximum current of each load
12
Voltage drop and
temperature rise
of nodes
If below 1000A, the voltage drop should
be ≤ 5mV for every hundred ampere; if
above 1000A, the voltage drop should
be ≤ 3mV; and the temperature rise of
node should not exceed 70°C
Multimeter,
semiconductor
thermometer
Use multimeter to measure the voltage
drop between the buses and cables at the
two terminals of the node; and judge the
rationality of the voltage drop of the node
based on the current flowing through the
node. Use the semiconductor thermometer
to measure the temperature rise of the
node. The measurement results should
meet the temperature rise limitation and
voltage drop limitation requirements
7.3 Routine Maintenance
Routine maintenance of power equipment mainly involves management of the equipment room environment and
inquiry of the equipment running status. The basic requirements for the management of the equipment room
environment have been presented in detail in the previous section. 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
See
NetSure
™
Control Unit (NCU) User Manual, UMM830B (Issue AA, June
3, 2014)
.
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
