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FAQ-SMPS CUM Battery Charger With & Without PFC

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1. WHAT IS THE DIFFERENCE BETWEEN SMPS CUM BATTERY CHARGER & BATTERY BACKUP?

SMPS cum battery charger is a model that serves two things simultaneously
1) Activates the load and
2) It charges the battery
Battery backup means how much time battery will support load as a backup in case AC fails.

2. WHERE SMPS CUM BATTERY CHARGER CAN BE USED?

In any mission critical installation where one cannot afford to lose data due to AC failure.

3. WHAT IS AH CAPACITY OF BATTERY?

Ah is the product of current in ampere and time in hours.

4. WHAT IS MEANING OF REVERSE BATTERY CONNECTION?

When positive terminal of battery is connected to negative terminal of battery charger, it is called as battery is connected in reverse direction.

5. HOW TO MEASURE BATTERY BACKUP TIME?

To calculate the battery backup time first we should know total load current and Ah of Battery. Then dividing Ah of battery by total load current we will get backup time.For example: – If load current is 10 A and Ah of battery is 120A h then (120/10)=12hours will be the backup time.

6. WHAT IS THE LOW BATTERY CUT OFF VOLTAGE?

In case of SMPS cum battery charger when AC fails load is backed up by battery.Now battery will start draining itself and its voltage will start reducing. At the point when charger is cut off from battery we call it low battery cut off voltage.

7. WHAT HAPPENS TO SMPS CUM BATTERY CHARGER IF COMPLETELY DRAIN BATTERY IS CONNECTED?

When fully drain battery is connected to SMPS cum battery charger then entire current will be supplied to battery and load will not get any current or it will not get activated. Normally it is very difficult to recharge the drained battery.

8. CAN WE USE TWO 12 VOLT 7AH BATTERIES IN PARALLEL TO SMPS CUM BATTERY CHARGER FOR INCREASING BACK UP TIME?

Yes we can use any two batteries of same rating in parallel to get more battery backup.

9. WHAT IS PFC

PFC is potential free contact, which helps in giving the signal to BMC regarding the failure of AC mains or failure of SMPS.

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