Sharp QT-80W Instruction Manual download pdf (Page 42)

functional earthing!

2.) Instruction manual

The necessity of the functional earthing of an ECG due to EMI reasons is

noted in the technical data or in addition on the type label of the ECG with

the appropriate symbol. The regulations for the skinning and the max.

length of the wire are valid for L- and N-conductor. The length of the

functional earth must not exceed the max. length of the other wires.

IEC 60363/VDE V0800-2-548 have to be observed for the functional

earthing.

3.) Manufacturing

As the functional earthing isn’t a safety measure of the luminaire, the

test of the ground wire connections can be omitted.

3.9 Temperature Ranges

To guarantee a reliable operation temperature ranges indicated on the

housing (ambient temperature of the ECG) as measurement temperature tc

have to be observed. In general, the lower the operating temperature of an

ECG the higher its service life.

(See Section

2.10, Reliability of ECG)

The temperature must be assessed separately for the two system

components (ECG and lamp). In the case of the lamp, there are physical

laws that restrict the temperature range, whereas in the case of the ECG

fixed limits must be set in order to ensure reliable operation. Apart from

this, there are external factors such as the reciprocal influences of ECG,

lamp and luminaire and the selected installation site which all of which

have an influence. Compliance with the specified limits and hence the

guarantee of the operational reliability are the responsibility of the relevant

luminaire or system manufacturer.

Operation of electronic control gear outside the recommended temperature

ranges can result in the following behaviour:

ECG ambient temperatures are too low:

Fluorescent lamps cannot be started reliably. At too low temperatures

some electronic components may not be functional or at least limited in

their operation.

ECG ambient temperatures are too high:

ECG life shortened or ECG even damaged. Î High ECG failure rate.

Important:

These limit temperatures apply even if the units are not in operation or are

in storage.

Typical temperature values for storage of ECG are:

Storage temperature: -40 °C to max. +80 °C

Humidity: 5 % to max. 85 %

3.9.1 Self heating ECG

Because of their low losses, OSRAM QUICKTRONIC

ECG for operation

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Sharp QT-80W Instruction Manual Page 42

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