Optimizing Battery Tripping Unit (BTU) for Reliable Charging and Extended Backup

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#1 21681305 11 Dec 2018 15:37

Luke Tanner Luke Tanner

Anonymous

Post #1
21681305 11 Dec 2018 15:37

I am an Electrical engineering student tasked with the optimization of a functioning battery tripping unit (BTU) on a large piece of machinery. The functioning BTU was experienced charging failures do to the incoming power supply tripping as well as running out of charge when kept on for extended periods of time without an incoming power supply to charge it. How can this issue be mitigated or lessened so as to optimize the BTU system as a whole for this particular situation?

Any suggestions or help on this topic is appreciated.
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#2 21681306 11 Dec 2018 22:27

Rick Curl Rick Curl

Anonymous

Post #2
21681306 11 Dec 2018 22:27

Hi Luke-We need lots more information:Is this an off-the-shelf BTU?
Why is the incoming power tripping?If the incoming power will be off frequently, then it sounds like the charging circuit may need to be beefed up, the battery may need to be larger, and you may need to look into ways to decrease the quiescent current drawn from the battery.If you can provide more information we'll try to give more specific suggestions.-Rick
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#3 21681307 13 Dec 2018 12:55

Cologne LED Cologne LED

Anonymous

Post #3
21681307 13 Dec 2018 12:55

Battery tripping units are used in industrial areas where the application of a DC supply in substations and switch rooms is required for the protection and tripping of circuit breakers. Once a fault is detected in the supply, the battery tripping unit is energised and trips the system to cut the supply to your equipment before failure occurs.
#4 21681308 13 Dec 2018 17:58

Luke Tanner Luke Tanner

Anonymous

Post #4
21681308 13 Dec 2018 17:58

Hi Rick,
This is an off-the-shelf BTU.The incoming power trips due to various external factors as the BTU is located in remote location where the electrical power supply infrastructure is prone to faults and unreliable power transmission.The load been supplied from the BTU cannot be further reduced so the most ideal situation would be 'beef up' Optimize the current system.Apart from adding additional batteries to the BTU is there any other way to improve the charging of the system itself? Perhaps the use of a UPS as a secondary/alternative source of power or through the use of solar panels?Thank you for the help.
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#5 21681309 13 Dec 2018 19:14

vaibhav sharma vaibhav sharma

Anonymous

Post #5
21681309 13 Dec 2018 19:14

Hi! Luke,You can use these Wireless Voltage sensors for the same, You can use it as a part of your tripping ckt whenever the voltage reaches the required threshold it will automatically trip the ckt to operate in Battery mode. More ever these wireless sensors can be monitored from the range of 2 mile and can be added advantage to yo Thank You
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#6 21681310 14 Dec 2018 21:30

Rick Curl Rick Curl

Anonymous

Post #6
21681310 14 Dec 2018 21:30

Hi Luke-When I mention reducing the quiescent current I'm talking about possibly redesigning the control circuit. Correct me if I'm wrong, but if mains power is out, the BTU has nothing to do, so it should not be drawing power from the battery.Can you provide schematics or a model number of the BTU that you plan to use? Is the power source for the BTU independent of the power that is being controlled by the breaker? Are you saying that the power to the BTU could be out while the breaker it controls is still under load?
#7 21681311 14 Dec 2018 21:39

Rick Curl Rick Curl

Anonymous

Post #7
21681311 14 Dec 2018 21:39

Hi Vaibhav-I don't think that product is appropriate for this application. Remote monitoring is not necessarily needed. The BTU must monitor current through the breaker, possibly phase imbalance, phase rotation, and/or ground faults, and if a problem is detected it fires a pulse into the trip coil of a large circuit breaker.
#8 21681312 14 Dec 2018 21:48

Rick Curl Rick Curl

Anonymous

Post #8
21681312 14 Dec 2018 21:48

Hi Cologne-Your post was copied in its entirety from the second paragraph on the Slaters Electrical website. While we appreciate your input, if the content is copied entirely from another source, it is customary to give attribution (credit) to the source it came from.We encourage you to post your own thoughts rather than those from someone else.
-Rick
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Topic summary

The discussion addresses optimization of a battery tripping unit (BTU) used in industrial machinery for reliable charging and extended backup during frequent power supply interruptions. The BTU experiences charging failures due to unstable incoming power and battery depletion during extended outages. Key issues include the unreliable power infrastructure at a remote site and the inability to reduce load demand. Suggested solutions involve increasing battery capacity, enhancing the charging circuit robustness, and reducing quiescent current draw by redesigning control circuitry. Alternative power sources such as uninterruptible power supplies (UPS) or solar panels were proposed to supplement charging. The BTU must monitor electrical parameters like current, phase imbalance, phase rotation, and ground faults to trip circuit breakers appropriately. Wireless voltage sensors were suggested but deemed unsuitable due to the BTU’s specific monitoring and tripping requirements. Clarification was requested on BTU schematics, model numbers, and power source independence to provide more targeted advice.
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Optimizing Battery Tripping Unit (BTU) for Reliable Charging and Extended Backup

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Topic summary