80 Chapter 6 Maintenance
NetSure 801 CA7 Power Supply System (New Skelecton) User Manual
5
．
Put the slide switch on
position. And then push the rectifier to the bottom until the rectifier panel is on the same
level as the rectifier rack panel, as shown in Figure 6-4.
Figure 6-4 Replacing rectifier (2)
6
．
Push the handle to the front panel, as shown in Figure 6-5.
Figure 6-5 Replacing rectifier (3)
7
．
Tighten the fixing screw on the handle to fix the rectifier on the rack, as shown in Figure 6-6.
Figure 6-6 Replacing rectifier (4)
8
．
Close the AC input MCB of rectifier.
The power indicator of rectifier will light up after a short delay, and then the fan operates. The alarm stops.
9
．
Check the following items, including: the controller can identify the new rectifier; the new one has the same current
sharing with the others; the controller will generate alarm when pulling out the new one. If all the checks are
accordant, the new one operates normally.
6.6 Emergency Treatment
In order to keep uninterrupted DC power supply of the power supply system, some emergency measures shall be
taken to cope with the faults that threaten DC power supply.
Faults that may occur in the power supply system and cause output interrupt mainly include unrecoverable damage
to AC distribution circuit, short circuit of DC load or DC distribution, system shutdown due to breakdown of the
controller, and blockage of rectifier due to DC output overvoltage, etc.
Emergency treatment of AC distribution
In case of failure of AC power supply to rectifier due to AC distribution fault, the AC mains can be directly introduced
into the input switch of the rectifier.
Emergency treatment of DC distribution
1
．
Partial short-circuit of load
Disconnect the branch fuse that corresponds to the damaged loads. Replace the faulty fuse. If the fuse link is
replaced for other reasons, it must make clear whether the load circuit where the fuse link is located permits power
disconnection.
2
．
Distribution short circuit
When this fault occurs, it shall be treated as follows: disconnect the AC power supply; isolate the batteries from the
system; and then use batteries and rectifiers to directly supply power to load.