RU1781849C - Starter for firing of gaseous-discharge lamps - Google Patents

Abstract

The use of high-pressure discharge lamps for ignition The essence of the invention: a starter for ignition of discharge lamps contains a cylinder with three hermetically sealed current leads in it. The first one is connected by a conductor with an additional fixed contact mounted on it, bypassing the bimetal plate. Its other end is connected by a flexible wire with the second of these current leads and is equipped with a contact mounted on the third current lead. Halogen or its compounds are introduced into the indicated starter balloon. The introduced halogen has arcing properties, which significantly increases the amplitude of the ignition pulse, which determines the reliability of ignition. 1 silt

Description

The invention relates to the electrical industry and can be widely used in the manufacture of starters for ignition of high pressure discharge lamps.

The aim of the invention is to increase the service life and reliability of the ignition.

The invention is illustrated in the drawing.

The starter is a sealed container filled with halogen or a halogen-containing substance (hydrocarbon compounds of halogens, metal halides), the leg of which has three leads (1,2,3). A bimetallic plate (spiral) (4) is fixed to the terminal (1), in the normal state, the closing contact (5). mounted on terminal (2). The end of the plate (4) is connected by a flexible conductor (6) to the terminal (3). At terminal (1), contact (8) is established by means of conductor (7). Normally closed contact (5) with terminals (2). (3) is connected in parallel with the lamp.

When voltage is applied to the lamp, the current passing through the bimetallic plate (4) installed on the terminal (1) heats it, which leads to folding of the plate (spiral) (4) and opening of the contact (5). In this case, a self-induction pulse is applied to the lamp, piercing the lamp. The magnitude of the pulse strongly depends on the presence of a discontinuous or vacuum arc between the contacts. The arc sharply reduces the amplitude of the pulse. The introduced halogen has arcing properties (due to the electronegativity of its atoms), which significantly increases the amplitude of the pulse under which the lamp is ignited, which determines the reliability of ignition.

The magnitude and duration of the pulse can be adjusted in parallel with a capacitor connected to these contacts.

Since the bimetallic plate (4) is permanently in the working circuit by means of the flexible conductor (6), the heat is released during the passage of the current

with

I

2

 vl co

 TO

s

xMeaet plate in a bent state. The plate (4), collapsing, closes the contact (8). part of the current passes through the conductor (7) and further rolling of the plate (4) is stopped. The location of contact (8) sets the time required for repeated operation.

Bypassing the bimetallic plate (4) during operation, firstly, reduces the time for the starter to re-operate, since KaV ifpW only passes through the plate (4) after the working current and the plate, the investigator heats up less, and secondly, it does not allow the plate to overheat when high operating currents, which eliminates the need to calculate starter elements for a particular lamp size and allows the use of its length for lamps of different sizes.

The halogen introduced into the starter cylinder reduces the number of times the starter tries to ignite the lamp (the lamps are ignited from the first pulse, while in vacuum, the ignition occurs after a 4-5 fold attempt), which increases the service life of the starters.

In addition, halogen has the ability to extinguish, which leads to a decrease in atomization of the electrodes, which in turn also increases the service life

starter.

The present invention has been implemented in starters for ignition of high pressure mercury, metal halide and sodium lamps.

The average number of ignition starters with evacuated cylinders of lamps DNaT 400 and DRTI 400 was 96, and the average number of ignition starters made according to the alleged invention

the same types of lamps amounted to 1250.

Thus, the introduction of halogen or a halogen-containing substance into the starter balloon allows to increase the service life and reliability of ignition of high-pressure lamps.

Claims (1)

SUMMARY OF THE INVENTION A starter for igniting discharge lamps, comprising a sealed cylinder with at least one electrode and a thermo-bimetal plate, characterized in that, in order to increase the service life and reliability of the ignition, halogens or its compounds are introduced into the cylinder.