Sharp QT-80W Instruction Manual download pdf (Page 11)

life. Electronic Control Gear improve the efficiency and the lamp life of

fluorescent lamps significantly.

1.7 Ignition of Fluorescent

Lamps

Prior to ignition, modern ECG heat the cathode to its optimum temperature

for electron emission. After a defined period the lamp is ignited with the

required ignition voltage. Only an optimized preheat start can guarantee

that the number of switching cycles has only little effect on the lamp life.

This is another important feature of ECG which has a positive effect on the

cost of operation and which should not be neglected when looking for

alternatives to CCG.

1.8 Costs and Safety

At the end of lamp life the emitter paste applied to the lamp electrode is

used up. The complete loss of emitter results in an increase of voltage in

the vicinity of the electrode. This situation can last over a longer period of

time. As an immediate result of the accompanying temperature increase at

the lamp ends the lamp sockets may overheat. Modern ECG are able to

detect this malfunction and switch the lamps off. Unnecessary attempts to

ignite are avoided by an interrupting function and therefore, also

overheating is avoided - an important contribution to more safety.

Professional ECG control all parameters constantly. A safety shut down at

the end of the lamp life is mandatory from January 1

, 2007 on for all ECG

that operate T4 or T5 tubes as it is included in the IEC 61347

(Omnibusnorm for safety of Electronic Control Gear). For several years

now, all OSRAM QUICKTRONIC

fulfill the safety requirements acc. the

IEC 61347 already.

However as there was no Standard for this before, some ECG

manufacturer neglect this due to costs.

1.9 Flexibility upon

Request

During past years, we see a clear increase in new, better and more energy

efficient lamp systems. Unfortunately, this resulted also in a growing

number of various ECG-types. To reduce this large number of types

manufacturers of ECG have taken a new direction and have developed

new multi-purpose ECG which can be used for a variety of fluorescent

lamps of different wattages. New integrated circuits allow the optimum

control of lamp features such as lumen output. This type reduction has, of

course, a big effect on the customer: ordering, warehousing and installation

of only a few ECG-types. The so-called MULTIWATT-ECG reduce all

relevant cost drivers.

1.10 ECG bring Progress

In addition to the basic tasks of lamp operation which are also fulfilled by

magnetic ballasts, Electronic Control Gear have much more to offer: They

have better performance and are more reliable, more environmental

friendly and more practical than CCG; even more reasons to use

professional Electronic Control Gear.

1.11 The right ECG for every

Application

OSRAM offers the right Electronic ballast for every application as shown at

the example of T8/ ∅ 26 mm fluorescent lamps.

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Sharp QT-80W Instruction Manual Page 11

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