Emerson NT5C06D user manual Slope Load Share, Forced Load Share, Load Share Adjustment Procedure

32 Installation and start-up

Slope Load Share

When the rectifier is connected in parallel with rectifiers in the same power shelf, or other power shelves, and this method of load sharing is desired, the SLS / FS switch of each rectifier must be pushed towards the SLS.

Forced Load Share

When the preferred method for load sharing is Forced Load Share, the SLS / FS switch of each rectifier must be pushed toward the FS designation. The power shelf must be connected to the next shelf through the 26-pin ribbon signal connector (pin-16), or to other compatible rectifiers equipped with a forced load share signal 0-12 volt positive bus.

Load Share Adjustment Procedure

If, after presetting the output voltage (float or equalize), the rectifier does not share the load with the other rectifiers in the power plant, take the following steps:

Procedure 5 - Adjusting the load share

Step	Action
1	Verify that all the share mode settings are the same SLS or FS.
2	Verify that all the rectifier sense points are the same.
3	Verify that all the rectifiers are in float or all are in the equalize mode (that
	is, the modes are not mixed).
4	If the above three cases are true, then this output voltage is
	maladjusted.
	Follow step A or B below.
	A) If the rectifier is in Slope Share:
	With the DC breaker ON, adjust the FLT (or EQL) potentiometer
	clockwise, if the current is too low, or counter clockwise, if the
	current is too high.
	B) If the rectifier is in Forced Share:
	Rectifier output is maladjusted by more than + 0.5 V. OPEN the DC breaker
	and adjust the rectifier output within 0.1 V of the plant voltage. Adjust the
	rectifier float voltage to the desired system float voltage. CLOSE the DC
	breaker and the rectifier will automatically share the load.
	end

UM5C06D ( 169-2071-504 ) P0831010 Standard 7.00 May 2001