Furman comes back to AVI LATINOAMÉRICA pages with important topics of energy management. This time Christos Desalernos addresses the issue in the A / V systems churches.
By: Christos Desalernos *
On-site A / V churches generally there are many misconceptions when it comes to the role of the energy management. For some reason, energy is often ignored as a problem in general. When expensive and modern amplifiers and equipment fail, usually blamed on the team, regardless of why failure; simply repaired or replaced.
Another problem is the budget. Now more than ever, budgets are tight and when a tender look, energy management is generally the first thing we ignore for energy savings because it is considered simply as extra outputs and not as protection. With that view it is understandable that they want to cut spending. Unfortunately, these assumptions are incorrect.
The fact is that our energy infrastructure was designed over 100 years for engines and power lights and equipment A / V not highly sensitive. The energy coming out of the electrical outlets is not 100% clean and stable. Some places are worse than others, but pollution is present in all sources of energy. Ultrasensitive circuits in equipment A / V professionals are technologically current extraordinary, but they are also fragile. This has made it increasingly more imperative to employ an advanced power protection and power conditioner for systems A / V professionals.
What is the situation?
According to NEMA (National Electrical Manufacturers Association), a surge or transient is a short peak passenger surge or disturbance on a waveform of energy that can vary in intensity from just a few volts to ends of tens of thousands of volts. These disturbances are not as rare as one might think, and can cause damage, deterioration and even destruction of the electronics inside a commercial building or a family house.
However, transient spikes and contamination of the ground are not the only problems facing today's sensitive electronics. There are also sustained overvoltage conditions, sometimes called extreme voltages, and are more common in older facilities due to poor neutral connections which may cause voltage surges above 240 VAC.
Many suppression devices electric shock may be unable to protect equipment against voltage surges and sustained these conditions are, in fact, the most dangerous and damaging to the equipment. Are the kinds of situations that cause nightmarish atmosphere that represents turning the equipment and see that begin to smoke. Most extreme voltage conditions result in equipment destroyed or, in the best case, the destruction of a suppression system electric shocks. In either case, certainly required equipment maintenance.
How to choose the power management solution
Before doing anything, the contractor should always verify the electrical integrity by a qualified electrician. They should check the impedance, voltage stability, harmonic distortion and the quality of the main power transformer. The transformer must be in good condition and be large enough to provide the necessary current. If the energy is deficient, the transformer may need to be reemplazado.Una poor impedance on the neutral can cause the power supply to heat and produce a thermal break. In this case, the neutral may need to be reset.
Then, the system capacity (or how much energy will be required) must be determined and then compared to how much energy is actually available. This will help determine what kind of energy management solution is needed; ie one 15, 20 or 120-A product. When a product is selected, churches must keep in mind that most terminals AC and old products for power management feature suppression devices inexpensive electric shocks that are designed to self-sacrifice when exposed to overvoltage conditions sustained or peaks transient voltage.
This will protect your computer, but there are no indications that electric shock arrestor has been compromised, so the next jolt will cross directly. Management products newest energy are not "self-sacrifice" and presented circuits interruption extreme voltage, which constantly monitor the incoming voltage and once the voltage has increased approximately 15% above the nominal, soar and make the power relay is opened, cutting off the supply to all connected components and critical circuits. Once the voltage is corrected, the unit is reset and the operation can continue.
Another factor to consider is the training of personnel. As volunteers and staff untrained church are usually the main equipment operators A / V, care must be taken to ensure that the components are turned on and off correctly. Sequential power control is needed whenever different kinds of equipment should be switched on in stages, rather than simultaneously.
In audio systems, usually the sequenced power is needed to allow transient driving amplifiers low and processors back to normal before turning on any power amplifier, since the simultaneous feeding may result in noise high, annoying and potentially destructive in the speakers. In addition, any large system whose components have an inductive load to the AC line (including electric motors, power supplies and power amplifiers of all kinds), the sequenced power can prevent current excessive inrush that make circuit breakers They are falling.
Churches should include energy management in their budgets. The standard range must be booked far 3% to 10%. At the lower end, would 3% for installations in newer buildings with acceptable infrastructure already in place. 10% would be for more advanced technology in older buildings where wires can not be run again. In these cases, a voltage regulator may be needed.
A voltage regulator accepts a wide range of input voltage from the power supply, and then transformed into a secure and stable voltage which is then sent to the connected equipment, keeping it under proper operation and avoiding damage from electric shock. As with most power management products, some technologies are more effective than others. Many voltage regulators use technology based on motor noise transformers inductors. These products are not only large and expensive, but they are also unreliable and actually add noise to the AC line. Such noise is masking many of the details that are required to achieve the best possible audio and video. To avoid this, it is best to find a controller that uses electronic circuitry.
Energy management as a safe
Churches should consider energy management as safe as a single product for this purpose can save thousands of dollars in replacement and repair of equipment. For example, I turned my garage into a recording studio. As I live two blocks from the power grid, I am subject to many cuts and fluctuations of it.
Last November, I was in my study when power is interrupted. My UPS Furman was activated and I could finish my recording session normally. When I finished, I realized that there was a huge power fluctuation, which could be evidenced by the bulbs exploited in the kitchen. In addition, all my units were presenting an interruption Furman extreme voltage. After doing the math, I determined that I had saved US $ 70.000 the price of equipment simply with a power management system US $ 800.
Many churches can easily say they have invested US $ 70.000 in electronic gear (as demonstrated in the example), so that the benefits of energy management for churches and other organizations that have tight budgets, are lighter than water . Replacement of equipment is extremely expensive. With an A / V system high cost on the line, it just makes sense to invest a little in protecting equipment.
* Christos Desalernos is national sales manager Furman, handles pro-sales, system design and noise suppression. He received the Auxiliary Equipment TEC Award in 2001 by the distribution system headphone audio HDS-16 / 16 HRM-and is an artist registered with the BMI. Christos has the title of electronic engineering from ITT Technical Institute.