Alpha Technologies CFR 1500, CFR 2000, CFR 2500, CFR 3000 - Manual (Page 30)

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3.4 208 VAC vs 240 VAC (60 Hz) Configurations
Since loads are shared, it is possible to exceed the rated maximum output
current of one of the transformer windings, without actually exceeding the rated
output current of the CFR-UPS. Therefore, careful consideration must be given as to
how the loads connected to the CFR are to be divided.
One way to ensure that the current drawn from each half of the transformer
windings is within the CFR’s specifications would be to measure the actual total load
being drawn. This can be accomplished using a clip-on current probe (refer to the
following drawings). The total current being drawn by L1 is a combination of the
current draw from A + B + C, (where A is the total current draw from each 120V load
connected to the receptacle, B is the total current draw from each 240V load
connected to the receptacle, and C is the total current draw from the L1 side of the
terminal block). The total of these currents must not exceed the rated output current
for each winding of the CFR. The same is true for the L2 winding of the transformer.
You can measure these currents at points B and D, (where B is the total current draw
from each 240V load connected to the receptacle, and D is the total current draw
from the L2 side of the terminal block).
NOTE: If using the SID or IID to measure the output currents, you must
calculate the Output current for L1 as described below.
If the CFR has a SID installed, the current can be measured via the RS232 port
of the CFR connected to a PC, as OUTPUT CURRENT 1 and OUTPUT CURRENT 2
(see section 5.6, Output Parameters). The current drawn in Winding 2 is Output
Current 2. The current drawn in Winding 1 (Output current L1) is calculated by
adding OUTPUT CURRENT 1 and OUTPUT CURRENT 2. The “Overload” light will
flash if the current in either winding is exceeded or, if the total output VA or Watts
exceeds the maximum rating of the UPS.
If the CFR has an IID installed, you can use the menu to display OUTPUT
CURRENT 1 and OUTPUT CURRENT 2. The current in Winding 1 is calculated
by adding OUTPUT CURRENT 1 and OUTPUT CURRENT 2.
3. INSTALLATION
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5.9 User Parameters, continued
5. RS-232 TERMINAL COMMUNICATION
Set User Security Code
The security code is used to restrict entry into certain areas of the
program. The code (1111) is preset at the factory and allows access to
USER PARAMETERS and HISTORY programs. The security code can
be changed using the number keys on the keypad. CAUTION:
If the
security code is changed and no record is kept, especially if the code
becomes forgotten or lost, you will not be able to reenter the program.
Display Unit Ident.
This screen is used to display vital information pertaining to the
Intelligent Interface Device, the micro-controller board and the CFR’s
power board. This information is extremely useful for troubleshooting and
maintenance.
Display Micro Ident.
Displays the software version and serial # of the micro-controller board.
Display PwrBd. Ident.
Displays the EE Prom # and serial # of the CFR's power board.
Set Maintenance Security Code
The Maintenance Security Code is a second level of security and is
used to gain access to the maintenance programs. The code can be
changed using the number keys on the keypad. CAUTION:
If the code is
changed and no record is kept, especially if the code becomes forgotten
or lost, you will not be able to reenter the program. The factory default
setting is 1111.
Start Shutdown When Delay is Set (xxx)
xxx= “Yes” or “No”, (Default value is “No”)
This command sets the “Output Shutdown Start Mode”. If this option
is set to “No”, the CFR waits for a shutdown command (menu item 502) to
start the shutdown sequence. However, if this option is set to “Yes”, the
CFR starts a shutdown sequence when the output shutdown delay is set
(menu item 505). Changing this option requires the USER SECURITY
CODE.
Start Output Shutdown
This command causes the unit to shutdown after the delay period
specified in menu item 505 “Set Output Shutdown Delay”, and for the
mandatory shutdown duration specified in menu item 506 “Set Minimum
Output Shutdown Duration”. You can use commands 505 and 506 to set
the output shutdown delay and duration, and then send this command to
shutdown the unit. During the
“Output Shutdown Delay” the TEST LED
flashes to indicate that a shutdown is pending. When the unit is in the
Output Shutdown mode, the five power LEDs will flash, in sequence, to
indicate that the UPS is powered-up with no output voltage present.
Activating this command requires the User Security Code.
Also displayed on line 502 is the current status of the output:
“off” No shutdown is scheduled.
“shutting down in hh:mm:ss” Indicates the time remaining until
shutdown.
“shutdown in progress” No output.
501
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502