Battery Voltage UPS - BVUPS

Battery Voltage UPS - BVUPS

Specifications

Maximum ratings
Input voltage	30 Vdc
Load current	10 amperes at 14 Vdc
Contact Ratings (battery and power fail)	Conservatively rated for 10 amps resistive at 240 Vac or 28 Vdc
Dielectric strength	1000 Vac, 60 Hz for one second
Physical
Ambient Operating Temperature	0 C to 60 C
Octal Case Size	2.75 X 1.75 X 2.375 inches (excluding octal pins)
Electrical
Protection	Diode protected for reverse and over voltage conditions
Power consumption	500 milliwatts MAX 24 mA @ 13.6 Vdc 17 mA @ 10.0 Vdc
Supplied voltage	10-14 (20-28) VDC (your equipment must be able to operate in these ranges. Most 12 volt equipment is designed to work from 9 to 15 V). We can supply Din Rail power-supplies capable of adjusting to theses voltages.
Drop out threshold	10 V +/-200 mV (20V +/-500 mV)
Drop out delay	10 seconds of continuous low voltage
Initial charge rate	1.5 A (Can be programmed to higher values with external charge rate module)
Power fail minimum current	400 mA (Special -10 125mA versions available)

Installation Notes

BVUPS ordering information

Be sure to jumper pins 6 and 7
The regulated power-supply you specify MUST be able to adjust to 13.8 or 27.6Vdc - AND MUST be adjusted accordingly.
Power fail problems are often due to minimum load requirements. Measure your load - manufacturers specifications on loads are often padded worst case.
Power fail operation(pins 1 and 4): During normal powered operation the contacts will be OPEN. When the unit goes on battery the contacts CLOSE and when the batteries run down and disconnect the contacts remain Closed . Make sure you understand that during "normal" operation the NC contacts will be open!
A version (-NO suffix) is available with the power fail contacts reversed. The following refers to the -NO version only!:

-NO version only!

During normal powered operation the contacts will be closed. When the unit goes on battery the contacts open and when the batteries run down and disconnect the contacts remain open (NO (Normally Open) means that under no power the contacts are open). Make sure you understand that during "normal" operation the NO contacts will be closed! There is not an -NC version as that is the stock version.

For more information on lead acid battery applications see Sealed Lead Acid Battery Applications hand book

Wiring diagram

Best Practice Maintenance

Lead acid batteries used with the BVUPS are on float most of the time and should last about 4 years before losing appreciable capacity. Thus, we recommend the following steps for best practice.

Put a In service date on your battery when you install it.

Every 3 months and a day after any prolonged power outage (you may want a different scheduled depending on the importance of your application).
- Put a meter across the power supply - check for 13.8Vdc (or 27.6Vdc) Adjust or replace as needed.
- Put a meter across pins 3 and 8 - It should be less than 0.1V (100mv)(or 0.2V for 24V systems) of the voltage on the power supply. (This test is only valid if there has been no outage in the last 12 hours)
- Pull the power - monitor the battery voltage for about 1 min. It should drop to about 12V(24V) and be steady, not dropping rapidly. Turn the power back on!
- Check the battery date - Replace if older than 4 years. - See replacement Battery

Step Rate module

For very large banks of batteries (over 50Ah) There is the STEP-RATE-MODULE to provide higher charge rates for system with more than 50AH It provides two rates: An increased initial charge rate - it then Transitions to float rate at 13.1 or 26.9V with an increased float current.

Orange wire connects to pin 3 and the Blue wire to Pin 6 of the octal socket.

Trouble Shooting

PF not working

Check power-supply voltage and batter voltage.

Most often due to Power supply not being calibrated. Must be set to 13.8 or 27.6Vdc
There is a minimum load current that must be met to detect the use of battery power. See Power fail minimum current specification above.
Power supply undersized or failed

Problems on start up

Pins 6 and 7 need to be connected for almost all applications
Power supply undersized

Top Page

wiki Index

Disclaimer

This information may have errors; It is not permissible to be read by anyone who has ever met a lawyer.
Use is confined to Engineers with more than 370 course hours of electronic engineering for theoretical studies.
ph +1(785) 841-3089

Email inform@xtronics.com