This is an application for a warehouse where pallets bearing goods of varying sizes are positioned on various parts of the floor. Trucks drive in and out through two doors relatively few times a day.

Light sources

This application shows an example of fittings with 50 Hz choke operation or non-dimmable HF operating devices.

Positioning of detectors

To achieve optimum detection and a high level of comfort it is important that detectors be mounted in the correct location.

The optimum direction of detection is when passage through the fields of detection is at 90° and the poorest detection is achieved when moving against or with the fields of detection. One must thus strive for a detector with a lens that has an opening angle of at least 90°. If one (PD-2200) detector is positioned in the corner shown in the illustration on the right, reliable detection is achieved when entry through both doors is at 90° to the fields of detection. With the standard lens (No. 15) the PD-2200 has a range of over 40 m. The detector must be mounted at a height of approx. 2 m.

The second detector (DISC-ET) should be positioned in the middle of the ceiling in the inner part of the warehouse. With a ceiling height of 6 m this provides a circular 18 m-diameter area of detection at floor height.

Control system

With this system the lighting is switched on automatically upon entry. It is switched off when the presence ceases and after the set delay. A delay of approx. 10 min should be set in the relevant detector.

In installations with 50 Hz operation and non-dimmable HF devices one is advised to implement control on the power side, i.e. to have the detectors control the contactors via an auxiliary relay. This will cause increased wear on operating devices and light sources. To alleviate this, fittings with 50 Hz choke operation must be provided with electronic igniters such as Aura Light ‘Strike’.

In warehouses with a high visitor frequency and with new or renovated buildings we recommend that dimmable HF operating devices and dynamic lighting control be installed.

The most important advantages attained using Dynamic Control are as follows:

• Evenly distributed basic light without extra fittings, operating at a level of 100 per cent.
• The possibility of saving 20 – 25 per cent during operation.
• Lower working temperature in the fittings, resulting in a lower life.
• Fewer activations and less power supplied, reducing wear on the fluorescent powder and resulting in a longer life of the light sources.
• The possibility of avoiding adherence to the light-source manufacturers’ recommendations regarding burning times, thus drastically reducing the operating times and increasing the saving.