Emerson MPR25 Maintenance Rectifier, Procedure 20 - Float/equalize and remote equalize, Step

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Maintenance

Maintenance

Rectifier

Procedure 20 - Float/equalize and remote equalize

Step	Action
1	Disconnect the sense leads from the rectifier, by either disconnecting a
	quick disconnect tab TB1 on the shelf or removing the appropriate
	system fuse. (See the “Introduction” chapter for system applications.)
2	Open the output DC breaker. The unit is ready for local adjustment.
3	The unit should provide voltage to the front panel test point terminals. If
	it does not, cycle the AC breaker to reset the unit.
4	Momentarily hold the FLT/EQL switch to EQL for local equalize.
5	Using a voltmeter, verify and adjust the EQL potentiometer to obtain an
	output voltage reading of 0.5 volts (see Note below) above the system
	equalize requirement.
6	Release the FLT/EQL switch. Verify that the output voltage drops to the
	float value plus 0.5V (see Note below).
7	Verify the HVSD level. It is recommended that it be set approximately 3 V
	above the shutdown limit of the power system. Refer to the “Installation
	and start-up procedure” chapter, subsection “Start-up procedure”, for the
	verification procedure.
8	Reconnect the sense leads locally to the rectifier. Close the output DC
	breaker. Cycle the AC breaker to reset the unit. The RFA/ON LED should
	be green.

–end–

Note: The 0.5 volt DC extra does not apply to MPR25 rectifiers above Release 30.

25A Switch Mode Rectifier NT5C06B / C Installation and User Manual