SU1363377A1 - Apparatus for controlling street illumination cascade - Google Patents

Abstract

This invention relates to electrical engineering and can be used in cascade-controlled urban lighting networks. The purpose of the invention., Shadows - increased reliability. The device contains head and re-supply points. Transformers 13 with two primary windings 14 and 16 and one secondary winding are installed at each repeated supply point. 12, a two-step thyristor 10, the control electrode of which is connected to the beginning of the secondary winding of the transformer. 1 il.

Description

This invention relates to electrical engineering and can be used in cascade-controlled urban lighting networks.

The purpose of the invention is to increase the reliability of the circuit for the inclusion of contactors.

The drawing shows a diagram of an apparatus for controlling an outdoor lighting cascade.

The device comprises a head supply point 1, to the power source 2 of which through the contactor 3 is connected the first section 4 of the outdoor lighting cascade. At the second step 5, the second power supply section 8 of the outdoor lighting cascade is connected via the contactor 7 to the power supply 6.

A three-phase rectifier 9 is connected to the ABC poles of the power supply 6, the coil 11 of the contactor 7 is connected to the output of which via a two-operation thyristor 10. A secondary winding is connected to the control transition of the two-operation thyristor 10. 12 of the transformer 13. The first primary winding 14 is connected between the neutral wire and the cathode of the first diode 15.

The second primary winding 16 is connected to the 8th cascade. Changeover contact

on between the anode of the second diode 17 and the phase wire A of the power supply 6.. To the phase wire A of the first section 4 of the cascade, an auxiliary switching contact 18 is connected, the disconnecting group of which is connected to the anode of the first diode, and the short-circuiting group is connected to the cathode of the second diode.

A device for controlling an outdoor lighting cascade operates as follows.

With the contactor 3 of the main supply point 1 turned off, there is no voltage in the first section 4 of the cascade, therefore the control thyristor 10 is locked. When the contactor 3 of the main supply point 1 is turned on, the phase voltage ABC is applied to section 4 of the cascade. From the phase wire A of section 4 through the first diode 15, the first primary winding 14 of the transformer 13 to the neutral wire N passes a current which induces an electromotive force in the secondary winding 12 necessary to unlock the two-stage thyristor W. When unlocking the control thyristor 10, a current flows through the coil 11 while the contactor 7 connects to the source

0

6 powering the second section of the 8th cascade. Simultaneously, the switching contact 18 disconnects the phase wire A of the first section 4 of the cascade from the anode of the first diode 15 and connects it to the cathode of the second diode 17. Since the power sources of the head 1 and re-6 power points are phased, then if there is voltage in the phase wire A The first section 4 of the cascade on the second primary winding 16 of the transformer 13 is zero. When the contactor 3 is disconnected, the voltage from the first section 4 of the cascade is removed. In this case, a second primary blasting 16 current flows due to a potential difference between the pole A of the power supply 6 and the phase A wire of section 4, which is connected to the neutral wire through the load - lighting devices. The passage of current through the second primary winding causes the passage of a two-turn current through the secondary winding 12. operational thyristor 10. The latter is locked, coil II is de-energized, contactor 7 is switched off, while the second portion is de-energized

five

18 connects the phase wire A to the anode of the diode 15, i.e. the circuit is reset.

A device for controlling an outdoor lighting cascade allows the coil of a re-supply point contactor to be operated without contact, ensuring reliable operation of the outdoor lighting cascade.

Claims (1)

Invention Formula A device for controlling an outdoor lighting cascade containing head and re-supply points interconnected by sections of a three-phase four-wire lighting network with contactors at repetitive power points having three-phase half-wave rectifiers, between the outputs of each of which and the neutral wire of the network are connected coil coils contactors, thyristors and the first diodes, which differ from each other in order to ensure reliable operation, at each repeated point entered second 313633774 a diode, a transformer from two primary points of supply, and an end to one and one secondary windings, the Ti-anode of the first diode, the cathode of which the resistor is dual-operative, through the closure group of the additional contactor is provided with an additional lie-5th switching contact with a contact , while this is connected to the same phase-control electrode of the two-step wire of the main power point, the thyristor is connected to the beginning-end of the second primary winding of the trans-secondary transformer winding, co-format The ora is connected to the zero wire of which is connected to the cathode of a two-10YU network, and the beginning to the cathode of the second operational thyristor, the beginning of the first diode, the anode of which is connected to the primary winding of the transformer-closing group of the additional wire contactor.