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30 Installation and start-up
UM5C06D ( 169-2071-504 ) P0831010 Standard 7.00 May 2001
Procedure 4 - Starting up the rectifier ( continued )
Step Action
10 In order to accurately adjust the rectifiers float and/or equalize (if different
from factory setting) the current share mode setting must be taken into
account.
Two modes of share are offered in the NT5C06DA/DB.
(i) Slope Share
The output voltage linearly decreases by -300mV from 0-100% of output
current capacity (0-25 A). Therefore to accurately PRESET the rectifier's
float voltage, it's running current within the plant environment must be
predicted and the output voltage modified according to expression below:
V.(preset) = Vo (desired) + (Io (running)
x .3v)
25
or
% Io (running) x .3v
For example: if the rectifier is expected to provide 12.5 A at 52.2 V then:
Vo(preset) = 52.2 + (12.5 x .3 V)
25
= 52.2 + .15 V
= 52.35 V
In Slope Share mode the rectifier's output may need to be corrected slightly
in order for it to share equally with any other rectifiers.
The SLS/FS switch of the rectifier (and all other rectifiers in parallel with it)
must be pushed toward SLS for slope mode sharing.
continued