Best Practices for iQ

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EnerGenius IQ is ideally suited for global application with a wide range of input voltages and certifications including: Software available in the Download Center.

Technical Drawings available in the Download Center. It simultaneously supplies smooth DC to critical loads, recharges the connected system battery and automatically maintains flooded lead-acid, VRLA, or nickel-cadmium batteries in peak condition. Applications include utility substations, electrical switchgear, DC control systems, engine starting, and related infrastructure equipment.

The award-winning EnerGenius IQ offers significantly lower total cost of ownership than any competing product:. For a charger delivering continuous W output the annual savings of 7. Any DC-powered mission-critical application, such as iq binary load format and load efficiency substation, power switchgear, engine starting and DC-powered control systems. It excels at recharging VRLA, flooded lead-acid or nickel-cadmium types of batteries. As of IQ is the only product in its class to be have received third-party certification to the seismic requirements IBC,and Field-demonstrated MTBF is in excess ofhours gives us the confidence to offer a full five-year warranty.

High reliability is tough to accomplish. SENS addressed all of the disciplines necessary to succeed. In mission-critical systems the only things matters is uptime. Nobody really cares about the specific components of the DC system hardware — the battery charger, the battery, or any other DC system hardware. Architecture is the high-level plan for the product that describes how the various hardware and software systems interact, and how this will evolve over time. One of many examples where SENS is ahead of its time is our dual microprocessor architecture.

If one processor is for some reason unable to shut down the charger in case of runaway voltage the other one will do the job. Dual microprocessors are like having a second driver in the car ready to hit the brake if the primary driver loses control. We combined the field-proven power train of our bulletproof ECU charger with a new in modular software system. The SENS design team is trained at some of the top engineering schools in the US, and includes expertise in SCR and switchmode power conversion, electromagnetic compatibility, analog and digital microcircuits, embedded software development, mechanical design and product safety engineering.

After extensive computer-based design our team builds prototypes, performs rigorous FMEA failure mode effects analysistests, and tests iq binary load format and load efficiency.

At SENS, regression analysis includes extensive software testing of all charger functions against a documented procedure at every release. New software is withheld from release until it clearly demonstrates high quality release-level stability.

For more details see http: Touch for iq binary load format and load efficiency means iq binary load format and load efficiency all fasteners inside the charger have a high visibility mark iq binary load format and load efficiency by assemblers and test technicians at each successive workstation. The act of applying this mark causes each successive operator to look carefully at the fastener. Touch for quality has virtually eliminated one of the most frustrating problems customers face in the field: One of the hardest things to acquire during a service call is information about iq binary load format and load efficiency battery system, such as site environmental conditions, alarm history, history of charger adjustments and internal charger data at time of failure.

The charger writes regular records to the Black Box that that can quickly reveal most of the necessary information needed to isolate and correct problems. Unauthorized charger adjustments, for example, often cause battery under- or overcharging. An IQ customer reported that the ammeter of his 50A charger very occasionally read 70 amps, which is far beyond the maximum current limit adjustment. Intermittent problems like this are often difficult to reproduce, leading to frustrating and costly delays for both user and service technician.

Black Box data emailed from the customer, however, revealed the source as a wiring harness workmanship problem, rather than electronic component or design failure. This has led to corrective action in the wiring harness. A different IQ customer that located his battery and charger in very different ambient temperatures was able to demonstrate to himself from the Black Box temperature and voltage logs that he could improve charging and accuracy and battery life by adding the remote battery temperature compensation option.

Per recommendation by our circuit breaker manufacturer, SENS has installed plasma diverters in some models to insure that any hot gas ejected during overcurrent operation is directed to a safe place inside a closed portion of the charger housing. This insures that even under extreme breaker trip conditions a nearby operator would be protected from any breaker trip residue.

This is conservative design practice that we iq binary load format and load efficiency not seen emulated on competing products. This is unsafe engineering practice and is contrary to UL requirements for use of circuit protective devices.

In comparison to standalone battery monitors, the Iq binary load format and load efficiency Battery Check system is fully integrated into the charger. It is intuitively easy to use, and requires no separate hardware, wiring or software.

And its cost is extremely low. Its purpose is to summon a trained battery technician to the site where he would localize the problem and take appropriate corrective action. Some standalone battery monitors are able to provide detailed, trended cell-level diagnostics that reduce troubleshooting time.

While valuable on large UPS systems that sometimes include hundreds of cells, these systems require costly hardware, complex cabling to each battery jar and specially trained technicians to operate.

Even after installation, the complexity of some standalone monitors causes some users to give up using them. It does this by reducing charger output and allowing the battery to support the load.

A healthy battery supports the load. At the conclusion of a successful Battery Check the Black Box logs the successful result. When the charger detects a Battery Check failure three things happen: The audible alarm can be cleared with a key press, but the visual and remote indications persist until a successful iq binary load format and load efficiency of a new battery or until following a procedure specified in the user manual.

All parameters are adjustable, including whether it is enabled, whether iq binary load format and load efficiency run automatically, duration of test, frequency of automatic test and test voltage setpoint. Battery Check is most useful with heavier loads because it depends on the connected load to stress test the battery.

There are two issues that limit its effectiveness on very light loads:. Very light continuous loads on large batteries place such small stress on the battery that even weak batteries can sometimes pass.

In switchgear and engine start applications the periodic loads are much larger than steady-state current draw. Battery Check actually emulates the regular site assessment practice that many electric utilities employ, but automates the work. For example, after arrival at a substation maintenance crews frequently shut down the charger before commencing other PM work.

Just prior to leaving the site the crew verifies that the station battery has performed to expectation and then restarts the charger to verify that the charger delivers acceptable recharge current. Many system failures are caused by simple human factors such as forgetting to close a battery breaker. Battery Check can catch some human factors problems before they create a crisis. The charger writes a wide variety of digital and analog values to its storage device once per hour.

DC voltage, charger output current, temperature, AC input voltage and a variety of internal voltages, temperatures and other data points that can be used for troubleshooting.

The charger writes the minimum, maximum, and average values for most variables every hour. All user adjustments are recorded. Each adjustment causes the Black Box to write both new and old values. In case of battery problem this is a great help in determining whether an unauthorized adjustment led to under or over charging.

You can download it from our Download Center. You will need to register on the site, but downloading the software is free of charge. Instructions for use of the software are included in the download. The degree to which current is shared between two chargers connected to a common DC bus. In theory, two chargers delivering exactly the same output voltage iq binary load format and load efficiency DC leads of exactly the same resistance will share the load equally.

A scheme intended to cause chargers to share output current despite normal manufacturing tolerance and unavoidable variation in resistance of charger output cabling.

In addition, operation of the IQ digital load share scheme is completely independent from of the AC source, meaning that two chargers powered by different grids or from different input voltages will reliably load share.

Digital load share is activated by connecting a load share cable between the optional CommsGeniusTM card installed in one IQ charger to the control card of the other charger.

Once both chargers are started, settings from the charger in which the CommsGenius is installed are written to the other charger.

This makes the charger adjustments identical in all respects. Settings are propagated only from the charger hosting the CommsGenius to the other charger. This provides a low bandwidth output current control loop dedicated to current balancing.

It provides good current sharing without compromising output load regulation performance. The drops need not be matched, and the system performance is good even if the conductor resistance is extremely low. It is highly reliable for several reasons. Load balancing does not depend on matching of input voltage, phase, or frequency, and does not depend on matching SCR trigger delays. The current share system has low bandwidth for high noise and ripple iq binary load format and load efficiency, meaning there is a low probability of misoperation due to external influence.

If a charger goes off-line, there is no impact on the other charger. If the load share system were to fail both chargers would revert iq binary load format and load efficiency non forced load sharing operation. Any IQ chargers with the same rated output voltage can be paralleled. Load currents will share according to percent of rated charger output. This is deliberate for reasons of stable system operation. At light loads this offset shows up as somewhat unbalanced current.

The following values are typical of this offset at light loads:. When using forced load sharing the limit is two chargers. When using random load share, without the forced load share system, there is no upper limit on the number of chargers. Forced load share should only be used when two chargers operate in parallel on the SAME battery. The CommsGenius, however, is isolated from battery potential.

Connecting the remote temp sense probe to the isolated CommsGenius thus eliminates the risk iq binary load format and load efficiency voltage on the probe itself. Performance in a redundant charger system: In a redundant charger system where both chargers are connected to a common battery both chargers must use the same voltage reference.

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