WHY POWER PROTECTION IS USED
If there is one thing that can be guaranteed it is that no electricity supply will be stable at all times. With today’s business operation being dependent on computers, and other electronic equipment, steady power is essential, and ultimately the user is responsible for this. There are many different problems that can be experienced and many different types of protection available on the market. The following list covers the majority of problems that could occur. Various items such as Voltage Stabilizers, Inverters, SineTamer and uninterruptible power supplies (UPS) can solve the problem.
A spike is an instantaneous severe increase in voltage (normally 100 % more than nominal voltage). Electronic equipment in the path of a severe spike can expect to have blown components in the power section. Typically a spike would be caused by either a lightning storm or when power is restored after a failure. The Voltage Stabilizers, Inverters, SineTamer and uninterruptible power supplies (UPS) that we supply will protect against these problems.
A surge is a short increase in voltage (normally 20 % more than nominal). While not causing instantaneous damage surges can stress delicate components and cause premature failure. Surges can be caused when heavy machinery such as welding equipment or a lift stops working. The Voltage Stabilizers, Inverters, SineTamer and uninterruptible power supplies (UPS) that we supply will protect against these problems.
Technically referred to as electromagnetic interference and radio frequency interference (EMI/RFI) . Electrical noise disrupts the smooth output one expects from the mains. Noise can cause glitches and errors in programs and data files. Many things can cause noise on power lines such as lightning, generators, industrial equipment, fluorescent lights etc. The Voltage Stabilizers, Inverters, SineTamer and uninterruptible power supplies (UPS) that we supply will protect against these problems.
Dips, which can also be referred to as brownouts or sags, are short decreases in voltage levels (normally 10 % less than nominal). Dips can be caused by the same type of equipment that causes spikes and surges, but voltage changes are induced by switching units on rather than off. A dip effectively starves a computer of power and can cause amongst other things locked keyboards and unexpected system crashes. The Voltage Stabilizers, Inverters, SineTamer and uninterruptible power supplies (UPS) that we supply will protect against these problems.
A blackout is a total loss of mains power. This could be caused by an internal failure such as a circuit breaker trip out or a general power failure where an entire power grid could be out. Depending on the type of software in use a blackout could cause irreparable damage to data files and would certainly result in the loss of any current work. The Voltage Stabilizers, Inverters, SineTamer and uninterruptible power supplies (UPS) that we supply will protect against these problems.
SELECTING POWER PROTECTION EQUIPMENT.
There are various types of power protection equipment ranging from fairly simplistic surge protection plugs, Voltage Stabilizers, Inverters, SineTamer and uninterruptible power supplies [we supply from the (UPS) off-line uninterruptible power supplies up to state of the art on-line uninterruptible power supplies (UPS)]. Buying power protection is similar to investing in an insurance policy and before the right type of uninterruptible power supplies can be selected there must be a good understanding of the problems at hand and how the various levels of protection work. It’s all a matter of economics and we can assist you in selecting the right combination of Voltage Stabilizers, Inverters, SineTamer and uninterruptible power supplies (UPS).
SURGE PLUGS :
These units are designed to protect equipment against spikes and surges. They are the cheapest form of protection and are usually purchased to provide a buffer against lightning. Combination units are available to protect both the power and telephone lines, these are usually used for modems or fax machines. However we have taken surge protection to another level by supplying SineTamer.
LINE FILTERS :
Line filters are very much like the surge plugs but are fairly obsolete and are replaced by the far more reliable and effective SineTamer products.
CONSTANT VOLTAGE TRANSFORMERS (CVT)
CVTs and Automatic Voltage Regulators (AVRs) Voltage Stabilizers are designed to supply clean power within a certain voltage range. The units are designed to regulate voltage fluctuations of + 15 % to within 5 %.
UNINTERRUPTABLE POWER SUPPLIES (UPS)
uninterruptible power supplies (UPS) can be divided into various different types i.e. off-line units, line interactive uninterruptible power supplies and on-line uninterruptible power supplies. There is a considerable difference in the way that these uninterruptible power supplies work and the different types should not be confused. An on-line unit is considered to be the best protection that money can buy.
OFF-LINE Uninterruptible Power Supplies
The off-line uninterruptible power supplies UPS takes in the normal mains, drives the load and keeps the battery fully charged. The input is monitored and as soon as the mains drops below a pre-set level or fails completely the uninterruptible power supplies switch to battery inverted power. Switching time is typically less than 4 ms, which is well within the tolerance of modern computer power supplies.
LINE INTERACTIVE Uninterruptible Power Supplies
The Line interactive uninterruptible power supplies (UPS) are designed to interact with the mains to supply a steady flow of power to the computer equipment. A high powered filter is incorporated into the machine to protect against spikes and surges. In addition an automatic voltage regulator is also added, this will help to increase the battery life of the uninterruptible power supplies as they will be able to switch to battery power at a much lower input voltage.
ON-LINE Uninterruptible Power Supplies
The on-line uninterruptible power supplies (UPS) is based on the ferroresonant principal. The incoming mains goes straight into a constant voltage transformer (CVT). The CVT creates an AC storage chamber which isolates the input from the output. No matter what happens to the incoming mains the output will remain constant. Once the mains fails the input of the CVT is fed from a battery powered inverter. There is no break on the output during the transfer from mains supply to inverter supply or vice versa. The use of ferroresonant technology reduces the component count on the machines which will automatically increase reliability.
Inverters have become a popular method as they are fairlycost effective. There are a number of types of inverters – quasi wave inverters – which really cater for the smaller/lower end of the product. Sinewave inverters which cater for the most sensitive equipment.