Patent GB-201153-A (GB)
Title: Remote control systems for automatic substations
IPC: H02J13/00
Filed: 1923-06-20
Abstract: 201,153. Arter, R. C. July 24, 1922, [Convention date]. Selective distant control systems ; tell-tale apparatus.-A system for the distant supervision of a number of automatic power substations each having several apparatus units comprises means for signalling to and indicating at the control station the stopping or starting of each machine, and for selectively controlling the machines by means of keys at the control station, the machines such as 10 being normally controlled automatically according to the load of switches such as 9. Each substation, Fig. 1, is connected to the control station by two lines 78, 79 and 260, 261 for signalling and control, having a relay register at each end. The relay register 80-89<1>, Fig. 3, at the substation is operated first according to the stopping or starting of a machine by the relays 40, 41, and then by the tens relays 50, 51 ... and units relays 60, 61 ... designating the machine, these being controlled by relays 20, 21 ... and 30, 31 ... which are set by the energization or de-energization of relays 12, 12<1> ... associated with the machines. The relay register 80-89<1> is set by these relays in turn and is restored to normal by trains of revertive impulses from the control station, the relay register 110-119<1>, Fig. 4, at the control station being set thereby. Sets of relays 159, 160, 140, 141 ... and 130, 131 ... similar to the sets 40, 41. 50, 51 ... and 60, 61 ... are thus selected and energize or de-energize a relay such as 150 individual to the machine, so as to light one of two indicating lamps 154, 155. Control of any desired machine is effected in a similar manner over a line 260, 261 selected by the keys 200-204, Fig. 5, by means of relay registers 240- 249<1>, 290-299<1> which are set by means of keys 205, 206 according to the operation and keys 210- 219, 220-229 designating the machine. A machine such as 10 is started or stopped by the energization of one of two relays such as 13, 14, the change being indicated at the control station as a check signal to the operator before it is actually effected. The supervisory apparatus shown in Fig. 4 is provided at the control station for each substation, but the control apparatus shown in Fig. 5 is common to all the substations. Means -are provided for telephonic communication over the control lines, and suitable multiple-contact relays are described. Signalling starting of a machine, Figs. 3, 4; first switching stage. Upon energization, for example of the'relay 12, the control relay 21 is energized over contacts of relays 18<1>, 17, locking up and operating the relay 17, which isolates the remaining control relays 20, 22 ... The relays 18', 18 are also energized, operating the control relay 31 which locks up and energizes a relay 17<1>, which isolates the remaining control relays 30, 32 ... The relay 40 is energized over contacts of the relays 17<1>, 18, and connects up the relays 50, 60 and 80<1>. The counting relay 80<1> causes the energization of a slow relay 77 and a relay 72, which releases the relay 40. Relays 70, 103 are now energized over the wire 78 and the fundamental circuit is established over the wire 79 and relays 76, 102. The relay 76 energizes the relay 80 of the substation register, while the relay 103 energizes the relay 110 of the control station register, thus operating a relay 101 which interrupts the fundamental circuit. The release of the relay 102 energizes the next counting relay 110<1> over contacts of the relays 119-110, and the relay 76 would operate the next counting relay at the substation if the lowest relay had not been energized, and the action would be repeated. The relay 101 also energizes relays 107. 104 and a sequence control relay 125, and the relapse of relay 76 energizes a relay 74 which releases the slow relay 77 and the counting relays. 80, 81<1>. A slow relay 75 becomes energized and. connects up a slow relay 73 which holds open the fundamental circuit and operates a sequence control relay 42. The first switching operation is now completed at the substation. The counting- relay 110<1> releases the relays 101, 107 thereby energizing a sequence control relay 124 which operates a relay 158 and a relay 160 of the pair 159, 160. A marginal relay 106 effects the release of the relays 104, 110, 110', 158 and itself. Second and third switching stages. The relay 42 energizes the counting relay 80<1> over contacts of the selected relay 50, thus operating the slow relay 77. The slow relays 74, 75, 73 de-energize in turn, re-establishing the fundamental, circuit and energizing a sequence control relay 43. Impulses are sent as before, and sequence control relays 123, 122 and a relay 129 become energized, connecting up the selected relay 140 over contacts of the relays 119<1>-110<1>. The restoring relay 106 then operates, and the fundamental circuit is held open by the slow relay 73 which also energizes a sequence control relay 44. The last train of impulses affects the energization of the relay 130 corresponding to the selected relay 60 through the medium of sequence control relays 121, 120 and a relay 127. At the substation, sequence control relays 45, 46 operate and energize relays 15, 71 over contacts of the relays 50, 60; thus transferring the control of the relays 21, 31, 72 to the relay 70. Indicating and release. A relay 150 energizes over contacts of the relays 130, 140 and lights a lamp 155. A relay 100 is thus energized, releasing the relays 70, 103 and all the relays at the control station and substation except 15 and 150. Signalling stopping of a machine. The relays 12, 15 are de-energized and the operative relays at the substation are 41, 51, 60, and those at the control station 159, 141, 130. The relay 128 is energized instead of the relay 129, and a relay 108 in parallel therewith causes the placing of a shunt round the relay 150 so that it de-energizes, and lights a lamp 154. in place of the lamp 155. Control of a machine from the control station, Figs. 5, 6. The switching operations are similar to those already described. Momentary depression of a key 204 designating the wanted substation energizes a relay 255 which connects up the line 260, 261 and completes a circuit over the wire 260 and a normally closed release key 209 for relays 230, 270, lighting a guard lamp 231. Keys 206, 210, 220 corresponding to the required operation and machine are depressed, and a prepare key 207 is operated momentarily to energize a relay 250 which connects up the relay 240<1> of the relay register corresponding to the key 206. A relay 251 is thus energized and operates a slow relay 252 which connects up a sequence control relay 233 and establishes the fundamental circuit over the wire 261 for relays 254, 275, so that the setting of the relay register 240-249<1> is transferred to the substation relay register 290-299<1> by means of an interrupter relay 272 corresponding to the relay 101. Sequence control relays 233-238 at the control station energize in pairs during the sending of the three trains of impulses, and a slow relay 253 corresponding to the relay 73 holds the fundamental circuit open for an interval after each train. A slow relay 277 at the substation corresponding to the relay 107 deenergizes at the end of the first impulse tram, and connects up through a relay 284 a relay 286 of the pair 285, 286, thus energizing a marginal restoring relay 274 corresponding to the relay 106. At the end of the subsequent impulse trains, the relay 277 acts to select the tens and units relays 300, 310 by means of relays 287, 289, sequence control relays 283-278 being operated in pairs' during the selecting operations. A circuit is thereby completed over contacts of the relays 300, 310 and a wire 320 to the substation supervisory apparatus, causing lighting of the lamp 155 at the control station in the manner already described. The sequence control relay 238 lights an operating lamp 232 to indicate that the selecting operation is completed, and upon depression of an operating key 208, a relay 271 at the substation is energized over the wire 261 and operates a relay 13 of the pair 13, 14 to effect the desired operation. Depression of the release key 209 breaks the circuit of the relays 230, 270 and restores all the apparatus to normal except the relay 13 and the lamp 155.