US1875868A

US1875868A - Automatic voltage controller

Info

Publication number: US1875868A
Application number: US395099A
Authority: US
Inventors: William C Heald
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-09-25
Filing date: 1929-09-25
Publication date: 1932-09-06
Anticipated expiration: 1949-09-06

Description

P 6, 1932- w. c':. HEALD 1,875,868

Av'rommc VOLTAGE CONTROLLER Filed Sept. 25. 1929 Inventor WWI/18m C 1%370] A iiomey Patented Sept. 6, 1932 WILLIAM c. HEALD, or IBELLOWS FA LS, VERMONT AUTOMATIC VOLTAGE c mmuna- I Application flled september 25.1929. "serial rm. 395,099.

This invention appertains to new and useful improvements in transformer controllers for electricity distribution systems.

The primary object of this invention is to provide automatic means whereby a current distributing line may be built up upon a decrease in its voltage.

During the course of the following specification and claims, numerous important objects and advantages of the invention will readily become apparent to the reader.

In the drawing:

The single view represents a diagram of the novel automatic voltage controller.

Referring to the drawing, wherein like numerals designate like parts, it will be observed that a pair of relays are denoted generally by A and B.

Numerals 5 and 6 designate the two sides of a current distributing line, while numeral 7 represents generally a transformer of the type especially adapted for use in conjunction with this invention.

Each of the relays includes a core 8 With a coil 9 wound thereon, the core being mov pivotal beam 10 able and connected to a through the agency of a pivotal link 11. As is clearly shown in the drawing, each beam is pivotally supported as at 12 and has an extension 13 carrying the means 14. This means 14-may include a spring (not shown) for normally maintaining the beam in an upward positionat its free end. I

A dashpot 15 is provided adjacent the free end of the respective beam to retard the action thereof. Each beam is also equipped with a block 16 at its free end for bridging either the contacts 17 and 18' or the

contacts

19 and 18 as the case may be. r

The transformer 7 includes a core 20, a primary winding 21 and a secondary winding 22 which has an intermediate tap from which the lead 23 extends. One side of the secondary winding is connected by means of the conductor 24 to the contact 18 of the relay B, while the opposite side of the sec.- ondary Winding is connected by way of the wire 25 to the contact 18 of the relay A. The tap wire 23 is connected to the contact 17 of the relay B, while the contact 18' of the relay B is connected by way of the Wire 26 to the line 6 of the distribution line. The contact '19 of the relay'B is also connected to the negative line 6 of the line.

The contact 17 of the relay A is con- 65 nected by way of the wire 27 to the line 5 of the distribution line while one side of the transformer primary winding 21 is likewise connected through the agency of the conductor 28 to line 5. 4 The opposite line of the primary winding is connectedby way of the conductor 29 to theline 6 ofthe dis- 2 tribution line. It will also be noted that the contact 18 of the relay A is connected by thejumper 30 to the line 5 of the line, as is the contact 19.

' The system is normal, when lines 5 and 6, and both relays A and B have their blocks 16 engaged with contacts 17 "and18. Block- -16 of relay A bridges contacts 17' and 18'- and completes the line 5"and it can be seen that

contacts

18 and 19 0f relay A open the circuit of the lead 25 and relayB being in the position as above described, leaves

contacts

18 and 19 unbridged, thus leaving the circuit of wire 24 from'the other side of the secondary winding to the line 6 open.

Although the primary is across the lines 5 and 6, no transforming action canbe completedby the secondary. When the potential falls across lines 5 and 6," relay A does not have suliicient magneticv pull to retain its position and is pulled by gravityto

bridge contacts

18 and 19, while relay B retains its former position. This operation of relay A breaks the circuit of line 5 and closes the secondary lead 25. It is obviously shown that the voltage isstepped up by the use'of a portion of the secondary'winding establishing a circuit from line 5 to contact 19, to contact 18 of relay A, from there through wire 23 to=contact 17 and from there to contact 18 of relay B and then to theline 6.

As the potential decreases further, relay B becomes insufiiciently energized and block 16 is pulled by gravitationtocontacts 18 and19 which opensthecircuit of wire 23'and closes it to the full secondary winding 22 which extends from the line 5 through

contacts

18 and 19 of relay Athrough winding 22 and wire y es 24 and through

contacts

18 and 19 of relay B to the line 6.

Manifestly, the foregoing invention provides means for always maintaining a voltage Within certain limitations and this is through the agency of automatic means.

Having thus described the invention, What is claimed as new is:

1. An automatic voltage regulator for distribution lines comprising a transformer having a primary and a secondary Winding, an opening in one of the distribution lines, the primary Winding of said transformer being connected across the distribution lines on the supply side of the opening, electromagnetic means for closing said lines at a predetermined voltage and upon a decrease in voltage to open said line and connect one side of the secondary winding to one of the distribution lines, and a second electro-magnetic means adapted upon the decrease in line voltage to connect a tap of the secondary Winding to the other distribution line and upon a further decrease in voltage to connect the other terminal of the secondary winding to the other distribution line.

2. An automatic voltage regulator for electrical distribution lines, comprising a transformer having a primary and a secondary Winding, one of said distribution lines having an opening therein the primary winding of the transformer being connected across said distribution lines, on the supply side of the opening in the line, a relay having a winding connected across said distribution lines on the supply side of the opening, a. second relay connected across the distribution line on the supply side of the opening, a circuit maker and breaker controlled by the first named relay for normally closing the line at a predetermined voltage and adapted upon a decrease in voltage to open said line, a second circuit maker and breaker controlled by said relay and connected in series with one terminal of the secondary Winding and to one of the distribution lines and'adapted upon the decrease in voltage to close and connectthe said secondary Winding terminal to the distribution line, a circuit maker and breaker controlled by the second named relay and connected in series with a tap of the secondary Winding and the outer distribution line and adapted upon the decrease in voltage to connect the tap to the distribution line and a second circuit maker and breaker controlled by the second relay and connected in series with the other terminal of the secondary Winding and the other distribution line and adapted upon a further decrease in voltage to connect the terminal of the secondary Winding to the other distribution line.

In testimony whereof I aflix my signature.

WILLIAM C. HEALD.