Tyco Electronics Galaxy SC Controller J85501F-1
Issue 13 February 2001 Installation 3 - 5
Note: If these numbering instructions are not followed, the
information from the mis-numbered serial rectifiers will overwrite
the information from the ferros if they unintentionally share the
same position.
2. When ferros and serial rectifiers are mixed, the rectifier alarms
from the ferros are delayed depending on the number of rectifiers
connected: from 2 seconds for 24 rectifiers to 17 seconds for 64
rectifiers.
3. Since the efficiency algorithm turns off rectifiers with lower
current ratings first, the 200A serial rectifiers will be turned off
first and the 400A ferros will be left on. (The same is true of a mix
of 200A and 400A ferros.) Thus, the efficiency algorithm may
cause all the ferros to be on line and all the serial rectifiers turned
off. When all the ferros and serial rectifiers are rated at 200A, the
efficiency algorithm will not favor either ferro or serial rectifiers.
It is suggested that the efficiency algorithm not be used in mixed
mode plants.
4. System rectifier load share capacity is diminished when parallel
and serial rectifiers are intermixed. The load share capability for
serial rectifiers is done through the controller by digital means,
while parallel rectifiers have an analog load share bus if one is
present. Thus the load share performance of the system will be
affected.
In these mixed systems, the parallel rectifier output voltages
should be adjusted to a desired start setting first. The the output of
the serial rectifiers can be adjusted upward until they begin to take
load. If more than one serial rectifier is present, load share may be
enabled or disabled. If enabled, the controller will attempt to load
share only the serial rectifiers. In either case, it is recommended
that rectifier current limits for serial rectifiers be set to 100% in
mixed mode systems.
Circuit Packs WARNING: Observe the following ESD (Electrostatic Discharge)
precautions:
• Wear grounded antistatic wrist straps when handling all circuit
packs.
• The wrist strap must contact the skin and is not to be worn over
clothing.
To Next Page
Loading...
Need help?
General
