Emerson MPR25, MPR15 Series user manual Float voltage adjustment, Equalize voltage adjustment, Step

Installation and start-up procedures 63

Note: If the desired HVSD level is greater than the –57 V float limit, hold the FLT/EQL switch to EQL and use the EQL potentiometer to bring the float voltage to the desired HVSD level. Hold the switch through the following steps.

Float voltage adjustment

Note: For installation where rectifiers can be connected to the charge bus (all rectifiers with DC breakers ON and remote sense leads connected) prior to final adjustment, Procedure 13 can be omitted and be performed in the “Parallel verification” procedure section.

Procedure 13 - Float voltage adjustment

Step Action

1Adjust the float potentiometer FLT to 0.5 volt DC (see Note below) above the desired float voltage determined by the battery vendor or power engineer, using the voltmeter attached to the test point (V+ V-).

2Final system’s float voltage adjustment will be performed as indicated in “Parallel verification” Procedure15, step 4.

–end–

Note: The 0.5 volt DC extra does not apply to MPR25 rectifiers of a release above Rel: 30.

Equalize voltage adjustment

Procedure 14 - Equalize voltage adjustment

Step Action

1Hold the equalize switch in the EQL position.

2While the switch is up, set the equalize potentiometer to 0.5 volts DC (see Note below) above the desired level determined by the battery vendor or power engineer, using the voltmeter attached to the test point (V+ V-).

–end–

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

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