Sharp QT-80W Instruction Manual download pdf (Page 34)

a) without reflector b) with a metal reflector

The resulting magnetic field strength in the near field and hence the effect

on the environment is reduced in b) by a current induced in a reflector. It is

important here for the surface of the reflector to have good electrical

conductivity. It is not necessary to earth it.

To shield the electric field, which is always radial around the lamp, it is

necessary for the reflector or its surface to be as conductive as possible

ant for the connection to earth or to protective earth to be of the lowest

possible resistance.

Based on these two requirements, the solution here is to have a reflector,

reflector and diffuser or louver with excellent conductivity connected at

lowest possible resistance to the ECG earth (PC I) or the PE conductor

connection of the luminaire.

3.2.2.5 Installation

Instructions for

avoiding Disturbance

The following diagrams show examples of correct and incorrect wiring.

1a) Long-run luminaire with reflector

To avoid interference on the lamp cable, the mains cable shoud be routed

to the outside immediately at the luminaire terminal. He lamp cables should

be laid in accordance with the criteria specified in Section xx (wiring

instructions). The reflector is used here for shielding and should therefore

be made of metal and be attached permanently with a high quality plug

connector (must have low resistance) to the luminaire body which in turn is

connected to control gear earth.

1b) Bad example

Mains and lamp cables that run in parallel over long distances. This leads

inevitably to interaction and therefore to higher energy in the radiated

Lam

Line volta

Hot wires

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Sharp QT-80W Instruction Manual Page 34