Q.What can a UPS do for me?
Q.How long can a UPS keep my equipment running for ?
Q.What's lifetime of a UPS ?
Q.How to maintain a UPS ?
- Never overload your UPS.
- Never connect any home electronic devices such as cooling fan to your UPS. This may cause malfunction of your UPS.
- Discharge the battery in a consistent interval. The best way to do it is once a month or once two months. The simplest discharge way is to turn on the UPS without connecting the mains
Q. What is called "Off-line UPS" ?
Ans: In this type of UPS, the primary power source is line power from the main utility, and the secondary power source is the battery. The battery charger is using line power to charge the battery, and the battery and inverter are waiting “on standby” until they are needed. When the line power fails, the transfer switch changes to the secondary power source. When line power is restored, the UPS switches back
Q. What is called "Line Interactive UPS" ?
Q. WHAT'S THE CAPACITY OF THE BATTERY ?
Q. WHAT IS EPV (CUT-OFF VOLTAGE/END POINT VOLTAGE) ?
Q. WHAT IS THE SELF-DISCHARGE RATE OF BATTERIES ?
Q.WHAT IS DISCHARGE HOUR RATE ?
Q. WHY THE BATTERIES NEED TO BE STORED FOR A CERTAIN TIME BEFORE DELIVERY ?
Q. WHY THE BATTERY CANNOT BE CHARGED (FULLY CHARGED) ?
Q. HOW TO AVOID THE PLATE SULFATION ?
- Using an extended charge, known as an equalization charge to slow-down the rate of sulfation
- Avoid low cutoff voltage discharges
- Recharge immediately after discharge
- Completely charged before using
- Please shelve the battery after it’s fully charged
Q. WHAT IS THE ADVANTAGES OF LEAD ACID BATTERIES ?
The lead acid battery have been used over more than 140 years, lead acid batteries are reliable, mature secondary batteries, globally manufactured and therefore a widely understood technology. When used correctly, they are very durable and dependable. Their self-discharge rate is among the lowest of rechargeable battery systems. Capable of high discharge rates, the lead acid battery is able to deliver the bursts of energy that are required to start an engine.
Lead acid batteries are environmentally sound in that they are recycled at an incredibly high rate. Today, 98% of lead acid batteries are recycled. With low maintenance requirements, the lead acid battery includes no memory and no electrolyte to fill on the sealed version.
In terms of these advantages of the lead acid battery, they are widely used by many different industries, such as, telecommunication, power systems, radio, and television systems, solar, UPS, electric vehicles, automobile, forklifts, emergency lights, etc.
Q.DOES OVERCHARGING DAMAGE BATTERIES ?
Q. DOES OVER-DISCHARGING DAMAGE BATTERIES ?
CHARGING Alternators and float battery chargers including regulated photo voltaic chargers have automatic controls which taper the charge rate as the batteries come up in charge. It should be noted that a decrease to a few amperes while charging does not mean that the batteries have been fully charged. Battery chargers are of three types. There is the manual type, the trickle type, and the automatic switcher type.
Q. WHAT MATTERS NEED ATTENTION DURING BATTERY INSTALLATION ?
2.Use insulated tools when installing the battery so as to avoid shock accidents.
3.Fasten all bolts tightly when installing connecting wire to illiminate occureance of sparks.
4.Keep a minimum distance of 2CM between batteries,otherwise the wires may be overheated by any chance.
5.It is recommended that battery be connected in series with the same type that has equivalent amount of capacity.
6.Only batteries or battery band that have the same norminal voltage and capacity can be connected in parallel (Parallel is not favorably advised).
Q.WHAT IS A LEAD-ACID BATTERY ?
Voltage is an electrical measure which describes the potential to do work. The higher the voltage the greater its risk to you and your health. Systems that use voltages below 50V are considered low-voltage and are not governed by an as strict (some might say arcane) set of rules as high-voltage systems.
Current is a measure of how many electrons are flowing through a conductor. Current is usually measured in amperes (A). Current flow over time is defined as ampere-hours (a.k.a. amp-hours or Ah), a product of the average current and the amount of time it flowed.
Power is the product of voltage and current and is measured in Watts. Power over time is usually defined in Watt-hours (Wh), the product of the average number of watts and time. Your energy utility usually bills you per kiloWatt-hour (kWh), which is 1,000 watt-hours.
A lead-acid battery is a electrical storage device that uses a reversible chemical reaction to store energy. It uses a combination of lead plates or grids and an electrolyte consisting of a diluted sulphuric acid to convert electrical energy into potential chemical energy and back again. The electrolyte of lead-acid batteries is hazardous to your health and may produce burns and other permanent damage if you come into contact with it. Thus, when dealing with electrolyte protect yourself appropriately!
Q.DEEP CYCLE VS. STARTER BATTERIES ?
- As the name implies, Starter Batteries are meant to get combustion engines going. They have many thin lead plates which allow them to discharge a lot of energy very quickly for a short amount of time. However, they do not tolerate being discharged deeply, as the thin lead plates needed for starter currents degrade quickly under deep discharge and re-charging cycles. Most starter batteries will only tolerate being completely discharged a few times before being irreversibly damaged.
- Deep Cycle batteries have thicker lead plates that make them tolerate deep discharges better. They cannot dispense charge as quickly as a starter battery but can also be used to start combustion engines. You would simply need a bigger deep-cycle battery than if you had used a dedicated starter type battery instead. The thicker the lead plates, the longer the life span, all things being equal. Battery weight is a simple indicator for the thickness of the lead plates used in a battery. The heavier a battery for a given group size, the thicker the plates, and the better the battery will tolerate deep discharges.
- Some “Marine” batteries are sold as dual-purpose batteries for starter and deep cycle applications. However, the thin plates required for starting purposes inherently compromise deep-cycle performance. Thus, such batteries should not be cycled deeply and should be avoided for deep-cycle applications unless space/weight constraints dictate otherwise
Q. REGULAR VERSUS VALVE-REGULATED LEAD ACID (VRLA) BATTERIES
Sealed Flooded Cells are frequently found as starter batteries in cars. Their electrolyte cannot be replenished. When enough electrolyte has evaporated due to charging, age, or just ambient heat, the battery has to be replaced.
Deep-Cycle Flooded cells usually have removable caps that allow you to replace any electrolyte that has evaporated over time. Take care not to contaminate the electrolyte – wipe the exterior container while rinsing the towel frequently.
VRLA batteries remain under constant pressure of 1-4 psi. This pressure helps the recombination process under which 99+% of the Hydrogen and Oxygen generated during charging are turned back into water. The two most common VRLA batteries used today are the Gel and Absorbed Glass Mat (AGM) variety.
Gel batteries feature an electrolyte that has been immobilized using a gelling agent like fumed silica.
AGM batteries feature a thin fiberglass felt that holds the electrolyte in place like a sponge.
Neither AGM nor Gel cells will leak if inverted, pierced, etc. and will continue to operate even under water
Q. WHAT IS SERVO VOLTAGE STABILIZER ?
Q. WHAT IS THE NEED OF SERVO VOLTAGE STABILIZER ?
Q. HOW TO SELECT SERVO VOLTAGE STABILIZER ?
> Input Voltage range
> Output Voltage range
> KVA rating.
> Type of load: balance/unbalance.
> Type of voltage: balance / unbalance.
> Type of protection required.
> Type of cooling: air / oil
Q. WHAT IS THE MAIN FUNCTION OF THE STABILIZER ?
Q. WHICH PROTECTION TO USE IN YOUR STABILIZER ?
Q. WHAT IS THE EFFICIENCY OF YOUR STABILIZER ?
Q. WHAT IS THE RATE OF CORRECTION ?
Q. HOW WILL I SELECT STABILIZER RATING FOR MY HOME / OFFICE ?Ans. Before selection the stabilizer you need to know how much power you use. By taking an inventory of all the essential electrical loads in your house / office, and doing a basic electrical load evaluation, you can get a good idea how much power your system needs to produce. Second, you
have to know about the power Fluctuations situations also that means what voltage minimum / maximum you are getting from the main A.C. supply. In brief, you have to select the Input Voltage window and the power consumption of your appliance.
Q. WHAT IS TRANSFORMER ?
Q. IS IT POSSIBLE TO CHANGE THREE PHASE TO TWO PHASE VICE VERSA WITH STANDARD TRANSFORMER ?
A: Yes. This is a very practical application for standard single phase off-the-shelf transformers. Some typical voltage combinations are as follows: 480 volts three phase to 240 volts two phase, or 240 volts three phase to 480 volts two phase, or 240 volts three phase to 240 volts two phase. Please refer to us for an exact schematic
Q. HOW DOES A TRANSFORMER WORK?
A: A transformer works on the magnetic induction principle. It has no moving parts and is a completely static solid state device, which insures, under normal operating conditions, a long and trouble-free life. It consists, in its simplest form, of two or more coils of insulated wire wound on a laminated steel core. When voltage is introduced to one coil, called the primary, it magnetizes the iron core. A voltage is induced in the other coil, called the secondary or output coil. The change of voltage (or voltage ratio) between the primary and secondary depends on the turns ratio of the two coils.
Q.WHAT ARE TAPS AND WHEN ARE THEY USED?
A: Taps are provided on some transformers on the high voltage winding to correct for high or low voltage conditions, and still deliver full rated output voltages at the secondary terminals. Standard tap arrangements are at two and one-half and five percent of the rated primary voltage for both high and low voltage conditions. For example, if the transformer has a 480 volt primary and the available line voltage is running at 504 volts, the primary should be connected to the 5% tap above normal in order that the secondary voltage be maintained at the proper rating