User's Manual

User Instructions Section 5877
Spec. No. 582140000 (Models 802NLDB, 802NLEB and 802NL-B) Issue AQ, January 15, 2013
Chapter 3. System Operating Procedures Page 3-23
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4) With the desired value being displayed, press and release the FUNCTION SET
ENTER key.
5) “ARE YOU SURE?” is displayed. Press and release the FUNCTION SET YES
(+) key.
6) Continue with the next procedure.
Setting the Power Share Voltage Offset
1) From the previous procedure, press and release the FUNCTION SELECT
DOWN arrow key to display "PS VOLTAGE OFFSET = v.vV".
2) Press and release the ALARM CUTOFF and FUNCTION SET ENTER keys
simultaneously.
3) Press and hold the FUNCTION SET YES (+) or NO (-) key to change this setting
as required. Release the key when the desired value is displayed.
Note: Enter the value that will be added to the float voltage to ensure the New
Power System will initially carry the load. This value must be higher than
the sum of the voltage drop in the cables connecting the two systems in
parallel and the output voltage regulation specific to the rectifiers of the
Existing Power System. If the sense leads are connected to the same
sensing points as the Existing Power System, the Voltage Offset should
take into consideration the output voltage regulation only.
(Adjustable from 0.1V to 1.0V, factory set at 0.1V.)
4) With the desired value being displayed, press and release the FUNCTION SET
ENTER key.
5) “ARE YOU SURE?” is displayed. Press and release the FUNCTION SET YES
(+) key.
6) Press and release the FUNCTION SET YES (+) and NO (-) keys simultaneously,
to return to the beginning of the MCA menu tree.
Verifying the Operation of the Power Share Feature
After programming the “Power Share” feature, verify its operation as follows.
a) In a Power Share application where the New Power System is taking all of the
load and the rectifiers in the Existing Power System are all in the standby mode,
use an external dry load bank of sufficient capacity to increase the load on the
New Power System over the “PS Initial Capacity Limit”.
1) Verify that the New Power System limits the total output of its (PCUs)
rectifiers to the current equivalent to this programmed percentage.
2) Verify that the New Power System lowers its output voltage by the value of
the programmed “PS Voltage Offset”.
3) Verify that the rectifiers in the Existing Power System take the additional load
as the load increases pass the “PS Initial Capacity Limit”.
4) Further increase the load in order to exceed the total capacity of the rectifiers
in the Existing Power System (or shut down some of the rectifiers in the
Existing Power System if the capacity of the external dry load bank is not
sufficient). Verify that the New Power System starts taking the additional
load as soon as the total capacity of the rectifiers in the Existing Power
System is exceeded.