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Surge protection for light-emitting diodes

A light-emitting diode and surge protection technology, which is applied in the direction of electroluminescent light source, light source, electric light source, etc., can solve problems such as difficult to realize

Inactive Publication Date: 2016-06-01
SCHREDER SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is possible when the lighting frame is mounted on a fiberglass or concrete pole, but difficult to achieve when the lighting frame is mounted on a metal pole

Method used

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  • Surge protection for light-emitting diodes
  • Surge protection for light-emitting diodes
  • Surge protection for light-emitting diodes

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Embodiment Construction

[0031] The present invention will be described with respect to specific embodiments and with reference to certain drawings but the present invention is not limited thereto. The drawings described are only schematic and not limiting. In the drawings, the size of several elements may be exaggerated and not drawn on scale for illustrative purposes.

[0032] A luminaire usually consists of a metal frame connected to ground by a safety earth (PE) connection. This is the case for class I luminaires (IEC protection class). In cases where the luminaire is not equipped with PE wiring, the luminaire is referred to as a class II installation. However, this does not mean that there is no possibility of returning to the ground, since the metal frame can make contact with the metal rod, which in turn makes contact with the ground quite well. However, ground is not so reliable in providing electrical safety, but is very good for returning surge currents.

[0033] First refer to figure 1...

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Abstract

Described herein is a surge protection device for protecting luminaires from high surge voltages. The surge protection device comprises shunt impedance elements (510, 520) positioned in connections (150, 155) between a driver (120) and a light-emitting diode module (130) to direct current generated by differential mode surges and / or common mode surges to Ground so that light-emitting diode elements (170) in the light-emitting diode module (130) are not destroyed. Series impedance elements (710, 720) may also be provided between the driver (120) and the shunt impedance elements (510, 520).

Description

technical field [0001] This invention relates to surge protection for light emitting diodes, and more particularly to implementing surge protection for such diodes in luminaires. Background technique [0002] Light emitting diode (LED) luminaires are often subjected to high surge voltages from various sources. These surge voltages can be generated by lightning strikes, by transients during switching on / off of inductive loads connected on the same network as the LED luminaires, or by heavy industrial machinery. [0003] Furthermore, in some cases surge voltages can be generated by electrostatic charge which accumulates on the luminaire body and can manage to discharge to the mains connection via the LEDs and LED drivers within the luminaire housing. LEDs are particularly sensitive to high voltage surges and can be damaged even without apparent damage to the LED driver. As a result, some if not all of the LEDs in a group will short out as the dies of the LEDs are destroyed b...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00H05B45/50
CPCH05B45/50Y02B20/30H05B45/382
Inventor Y·博尔雷
Owner SCHREDER SA
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