US1154733A - Circuit-controller. - Google Patents

Description

A. SIMON.

CIRCUIT CONTROLLER.

APPLICATION FILED NOV. 27. I911.

1,154,733. Patnt-ed'bept. 28, 1915.

1s l\ f ARTHUR SIMON, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE CUTLER-HAMMER MFG. 60., 0F MILWAUKEE, WISCONSIN, A QORPORATION OF WISCONSIN.

GIBGUIT-GONTEOLLER.

Application filed November 27, 1911.

To all whom it may concern.

Be it known that I, ARTHUR SiMoN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful lmproven'ients in Circuit-Controllers, of which the following is a full, clear, con else. and exact description, reference being had to the accompanying drawing, forming a part of this specification. My invention relates to improvements in circuit controllers and more particularly to those for polyphase alternating current circuits.

It is one of the objects of my invention to provide a circuit controller which will. upon the occurrence of abnormal conditions in any phase of the controlled circuit, protect the translating; device or devices connected therein and at the same time fully protect its own controlling windings.

Various other objects and advantages of my invention will be hereinafter clearly and fully set forth.

In order to disclose the nature and characteristic features of my invention, I shall describe the controller diagrammatically illustrated in the accompanyingdrawing which embodies my invention in its pre ferred form. it should be understood however, that my invention may be carried out by means of other instrumentalities than those illustrated in the accompanying; drawinp; and may be used in other relations.

The controller selected for the purpose of illustration controls the circuit of a motor 1 supplied with current from a three phase alternating current supply circuit. the lines of which I have numbered 2, 3 and 4.

The controller includes a main switch 5 which may in practice be of any preferred type. As illustrated this switch includes two movable contact members 6 and 7 provided with cooperating contacts 8 and 9 respectively. The contact members 6 and 7 are operated by a solenoid 10 through toggle links 11. The contact member 7 is electrically connected by conductor 12 to the left hand terminal of the motor. While its cooperating" contact 9 is connected to the supply line 2. Contact member 6 is connected by conductor 13 to the right hand terminal of the motor while its cooperating contact 8 is connected by conductor 14 to supply line 4. Thus upon engagement of the contact Specification of Letters Patent.

'tacts and thus close the motor circuit.

Patented Sept. 28, 1915.

serial no. ecaevs.

The relay switch 17 thus serves to control the circuit of the operating windingof the main switch.

Relay switch 17 is provided with an operating winding: 19. One terminal of this winding connected by conductor 20 through a resistance 21 or a short circuit around said resistance by conductor 22 to line 2-, while its OPDOSltG terminal is connected by conductor 23 through a fuse 24 by conductor 25 through single pole central switch by conductor 27 to conductor 14 and thence to line 4-. Accordingly upon closure of switch 26. the winding 19 of relay 1? is connected across lines 2 and 4.

The operation of the controller thus far described is as follows :Assumin,e the sevcral switches of the controller to be in the positions illustrated, the motor circuit will be open. To start the motor the switch 26 must first closed. This connects the winding 19 of relay 1'? across supply lines 2 and l as previously described. causing said relay switch to respond and connect the op crating winding 10 of main switch 5 across supply lines 3 and '1. 'Switch 5 thereupon responds causing the contact members (i and 7 to engage their respective cooperating con- The relay switch 17 must be closed and maintained. closed in order to energize main switch 5.

The relay winding 19 being'connected across lines 2 and 4: and the winding 10 of the main switch being connected across lines 3 and it is apparent that the energization of-these windings is dependent upon the voltage conditions of all three phases of the supply circuit. Accordingly if after the motor circuit is closed, there should be an abnormal drop in voltage in any phase of the circuit. one or the other of said windings would be deenergized. In either case,

- ViSlOIl is made for lazy switch ,the resists ice E51 is ll 2 ClOSlH" should be :1

iniure or en abhor nzil Cl Voltage across the lines 3 and ing 10 would be we as to release the 11min. swiich l'iowcrcr, inin'lil; reemin i the circuitl"- clo I. This would result in 4;, the "WlllCll: ned to such an ex The relay i9 1 oil in fglie i 10, 'n the evenl; a partial. failure of sailing across it zls. Further, if was l :1 partial in. we of; w e might be )ii iu'ed or even. uui'n -1 cu (l it be left" in c' cuil', under iihe {Lliifilfid conditions, Lilcew should the relay switch (ll-op on? upon ii partial failure of voltage its Wind lm'left in circuit, thereby causing a pciuliture oi currc th ubjecting the same to n. the case of she Win(li no ire so provide nw v: 1

i isle of cxrrenl {Hill for contri'ilicr winning nnier also set $12.. low describe the nmans ill for prm' ciu e; the "controller This nr is includes the fuse once 53 Ni 2L swicoh. 0

main swwcn 5'5 lzo open close 7 ound the nee 21.

series Hail. the h. 1'. io he mpuhlc 1 I lief-ivy 7 mentor and connected h a link 32 to n oi the wer g solenoid of i1: m: in l nner that when if, ilec iel meo ii 1.5 eciiuueu in 3d and 34- to coniulete lhe eircuu around ihe c 7 l connects ac'hml eil lo iliseng l 'k: terrupi, aiil short cur: upon respo 11min swuch 5. The resistance 21 inn excluded from the circuit of the relay "wnfling when the main mu 1 open and inserteil in circuit with relay winning when. the main switch. is closed. Thus prosecuring a comparatively of current for operating the reand then reducing the flow of curreiit thrmigh the relay Winding upon. response of the main switch. Tn practice, so designed that wl' n inseried in the circuit of the relay winding heuvy si i rcrluce the how of curl-cut therel'hrough to u m i which Sllhi winding may suii cly curry on lclow the min: at which i he ifuse wells ilfnc l'use 2ishouhl i so dc? Q'ncd 11s to curry the of. current (lesir rcl for operating 1e relay 101 e sui'iicieni; time to enable the main swi ch close.

With k cincnt. i'l upon closure of she conir witch 26, the relay l9 rcspomls and herea E1 the main switch.respomls in clue course cue controller will close the 1110- tor ciz'cuifi and maintain the some closed. If, on the other hand, the main switch should fail to respond after response of the relay due to an nlmornmlly low voltage in one o more phases of the supply circuit, then the continued heavy surge of current flowing hrough the relay winding would melt the fuse 24;. This would cause interruption of the circuit of the relay which would open thereby interrupting the circuit of the Winding of :bhe main switch. This protects both windings against injury and also saves useless BZPQIMlliIHI'C of energy. Assume now that upon closure of switch 26 the relay fails to respond (i116 to an nbnor- 11 life") in voltage across lines 2 and 4. once such conditions the 'esistzuice 21 is the result 1 O;"-;-($l1" ,l'!l'(i with (iron in wiltug'e is sullicicnl; .OW oi current through the rete ii saic value bhc fuse 5% with the results nlorcsziic. 1115 e seen that the controller z'isures full protection to the mo- 13])011 en ehvormul drop in voltage in 4 :13 phase of the i'riicuil". and at the some time i i rotect its own windiu as new and ihf zfienl; of she U11 lei: for polyph'ese alterneh is, in. combination, means nlzinuifiy of circuit and a Keene-responsive devices derent phases of the circuit pion thereof and upon one an- 3 or ciiinz'zinued cnergizetion', said means operable by certain of said devices but "21 resnonse of all end being defor retention. in circuit closing posin continued energization of all of L. in e circuit controller for .polyphase alternating: current circuits, in combination, means controlling the continuity of circuit, and a plurality of elecbromesponsive devices including an operating device for said means, nnd'iinother device controlling said former device, said devices being n t-on different phases of the circuit for energizetion lthcreof and. said controllingdevice heing responsive independently of said opmg (levies but dependent for continued.

dependent- Fri said devices and means controlling; the energizing circuit of the letter device to render maintenance thereof dependent upon respouse of said. operating device within a limited period following response of latter device.

In polyphuse cir-o'uit controller, in combination, a plurality of electro-rosponsire switches re pousive successiv iv to close all phases of th circuit, the operating u l ings of said-switches being depeniflent' fol their euergizzition upon the voltage conditions in the iiliiiereht phases of cii uit, means controlli g the ei'iergizing circuit of the first res )OIlCllDg switch to open the after a temporary period and means operated by the last responsive switch to render said former means ineffective.

5. In a, polyphuse circuit controller, in combination, a. plurality of electro-responsive switches responsive successively to close all phases of the circuit, the operating Windings of said switches being dependent "for 5 their cnergizetion upon the voltage conditions in the difierent phases of the circuit, means adapted to open the energizing Crcuit of the first responsive switch but having a time element, permitting response of the lust X'GSPGETlSiVE- switch under nor-ma condi tions and means operated by the in st respousivc switch for rendering said formcr meu'ns ineffective.

6. In an alternating current circuit controller, in combination, two electro-responsive devices dependent for their energizution. upon the electrical conditions of diiicrent phases of the circuit, one or said devices controlling the energizing circuit the or other and means; controlling the energizi circuit of the former device to rend-c1." incintenunee thereof dependent uponjresponse and continued energizution of the'other of said devices. 7 In an. alternating current circuit controlle in combination, two eiectrorespon sive devices dependent for their energimtion upon the voltage conditions of different phases of circuit, one of said devices c0ntroiliug the encrgimtion of the other, and the former being initially responsive independent of the latter and means rendering continued energization of said former device dep ient upon the response of said latter do e Within a limited period following the onse or said "former device.

l 8. In an alternating current circult eontroiler. in coinlunntion, two elect-r0 resp0n' sive devices dependent for their energizetiou upon the voltage conditions of diiierent phases of the supply circuit, one of sziid devices controlling the energizing circuit of the other, a fuse in circuit with the operating winding of the first respondingdcvice, said fuse tending to interrupt the circuit thcrethrough after the lapse of a. temporary period and means operated upon the-response ot the other device to protect sand fuse,

In an alternating current circuit controiier, in conihizuition, two electro responsive devices tion upon the voltage conditions of diiierent phases of the controlled circuit, means ne cersituting the response of one of said devices prior to res 'ionse of the other, a fuse in circuit with the operating" winding of v the former and a resistance for the circuit of the former device controlled. by the latter device, said fuse tending to interrupt the circuit of the former device unless the latter device o 'ieratcs within a predetermined time.

10. in u polyphzise circuit controller, in con'ihinutiou, a plurality of switches having their QPCIfLtiIlfZ winnings connected in dif fereht w-luises of the circuit, said switches being in arlocfied to operate successively to close the several phases of the circuit, a fuse messes.

ARTHUR SIMON.

ilitnessm FRANKH. Helium,

JuANuTTn S. BRGCK. 3

dependent for their energizu-

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