CA2185213A1 - A switching system - Google Patents

A switching system

Info

Publication number
CA2185213A1
CA2185213A1 CA002185213A CA2185213A CA2185213A1 CA 2185213 A1 CA2185213 A1 CA 2185213A1 CA 002185213 A CA002185213 A CA 002185213A CA 2185213 A CA2185213 A CA 2185213A CA 2185213 A1 CA2185213 A1 CA 2185213A1
Authority
CA
Canada
Prior art keywords
load
switch
signal
switching
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002185213A
Other languages
French (fr)
Inventor
Hyung Sik Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2185213A1 publication Critical patent/CA2185213A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00019Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using optical means

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Selective Calling Equipment (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

The present invention relates to a switching system in which users can optionally turn on/off any load among a plurality of loads in each of different places. The switching system can switch a power supply being supplied to loads by manipulating either a manual switch or a remote control switch, control the power supply to loads which are set up in a plurality of chambers blocked off from each other, with one remote controller in each of different chambers, alarm emergency, and recognize a control state of loads of each chamber in other chambers. Furthermore, the system includes a preventive device so that loads of the other chamber cannot be controlled in other chambers. Accordingly, the present invention provides the switching system which can easily control loads installed in a plurality of chambers blocked off from each other.

Description

WO 95~24759 218 5 21~ F~ hS5.'~ 1~
.
I
A SWITCHING SYSTEM
TEC I T~IC A T, I~TT~.T,D
The l~resent invention relates to a switching system capable of, by means of both remote control switch and manual switch, executing a switching olleration, in which users can ol?tionally turn on~off any load among a l~lurality of loads in different l~laces from each other.
BACKGROUND ~\RT
Generally, there has been used a manual switch or ~ remote control switch using a remote cuntroller in switching of l~,wer sul~l~ly.
However, conventional switching systems have drawbacks that users 15 always ol~erate the manual switches in their original places and carry with a remote controller for a remote control switching.
DISCLOSU~T~ OF TTT~ INVT~TION
Therefore, to solve the above l~roblems, it is a~l object of the l~resent invention to l~rovide a switching system which can switch optionally the l~ower of loads set up in the other chamber in re~l~ective chambers blocked off from each other.
Other object of the l~resent invention is t~ l~rovide ~ switching system cal~able of checking an on/off state of a few loads at resl~ective location.
Another object of the l~resent invention is to l~rovide a switching system which can warn against a state of emergency between sel~arated l~laces.
To accoml~lish the above objects of the present invention, there is provided a switching system for switching l~ower being sul~plied to Wo gSI247S9 2 1 ~ ~ ~13 ` ~ 18 ~

a plurality of luads the system comprising electronic switching means I~rovided with at least two or mor~
switch sets each ()f which is coml~osed of switches cal~al~le of controlling the loads respectively; load controlling means including E~
~lurality of load controllers that are electrically connected to each of the switch sets in which each of load controllers is ol~erat~d according to a control signal from an optional switch set of the electronic switch means; and means for su~ lying the power to a desired load or for cutting off it according to an outPut signal from the load controllin~
means.
BRT~l~ I)ES~RIPTION OF DRAWINGS
FIGs. lA to lC are circuit diagrams of E~ switching system in accordance with one embodiment of the l~resent invention;
FlGs. 2A fo 2C are circuit diagrams of a switchin~ system i accordance with other embodiment ()f the present invention;
FIGs. 3A to 3C are circuit diagrams of a switching syst~m in accordance with another embodiment of the l~resent invention;
FIG. ~ is a circuit diagram of a switching system in accordance with further anotller ~mh~tlim~nt of the present invention;
FIGs 5A to 5C are concrete circu;t diagrams of the embodiment of FIG.4;
FIG. 6 is a circu;t diagram of a sv~itching system in accordance with further another eml~odiment of the present invention; and FIG 7 is a sl~ecific circuit diagram of the embodiment of FIG.6.
:~EST MQ~ FOR CARRYING OUT T~l~ INVENTION
The embodiment of the l~resent invention will b~ describ~d below with reference to the accoml~anying drawings.

~ WO ss/247s9 Z l ~ r~

FIG. 1 illustrate a switching s~stem in accordance with one embodiment of the present inventioll. The switching s~stem of this embodiment is made ul~ of controlling each load in differ~nt loc~ltions, in the case that a l~lurality of loads are seParately installecl in at least 5 two or more l~laces blocked off from e~ch other. This embodiment shows that five loads can be controlled in each location sel~arated fr(1m others, resl~ectively. The switching system in accordance with the l~resent invention coml~rises electronic switching means 100, which are composed of l~lurality of switch sets. Each of switch sets is 10 sel~arately arranged in isolated l~laces, including remote controllers and or contact switches. ~ince each of switch sets is in th~ same form, a first set will be onl~ described h~reinafter. However, a fourth set in the drawing has no a remote controLer. an~l a fifth set can control only any one l~redetermined load without a remote 15 controller.
The first switch set coml~rises a remote control switch that is l~rovided v~ith a remote controller 20A and a receiving l~orti()n :~OA for converting c~ corresponding signal from th~ remote controller 20A int~l an electric signal, and switches 31A~ 35A which are as many as hve 20 loads comlected between a l~ower su~ ly l~art and outl~ut terminals of the receiving l~ortion 30A. Here, the remote controller 20A can eml~
all integrated circuit such as TC9148P, and the receiving l~ortiun 30A
can use an integrated circuit such as TC9149P or TC915ûP.
One of load controlling units 200A ~ 200E are sel~arately 25 connected to the outl~ut terminals of each switch set, only the first unit 200A of which will be described as the load controlling units 200A ~ 200E have the same constitution. An OUtl~Ut terminal of the first switch set is coupled to a signal transmitter 60 via a matrix 50 by insertion of a DIP switch 40. An outl)ut signal of the signal 30 transmitter ~i0 is sul~l~lied to a signal decoder 71 which decodes the transmitted control signal. and then the decoded signal is provided to 218521~
WO 95124759 r~~ C,~ D1~ ~

a drivillg signal generator 73 which generates a driving signal to control a correspollding load through matrix 72. The drivin~ signal generator 73 controls each load according to the transmitt~d control signal, to out~ t terminals of which transistors TRl~TRs as many as 5 five loads are coul led in series with Dhoto-coul~lers 41-45. Herc, th~
signal decod~r 71, matrix 7'2. driving signal generator 7.~ can employ integrated circuits such as I~T3170, CD4028 and HD4027. resl~ectively.
On the other hand. a plurality of light emission diodes LED
which disl~lay a control state of each load are l~rovided to outt~ut 10 terminals of the d~-ivin~ signal generatur 73. Also, it is l~referred that a DIP switcll 74 for manual control is l~rovided to the outl~ut t~rmin.~l of the driving sigllal generator 73. In addition, a load selector 80, coml~osed of ~ l~lurality of switches 81-85, is located between each of transistors TR,-T~5 and l~hoto-coul~lers 41-45. When one of switches 15 of the load selector 80 is turncd on, a desircd load can be connect~d to a corresDondin~ se~ Accordingly, if the first switch 81 of the load selector ~0 is in an ~on" state and ~ control signal is sul)l~lied in order to make a first load L, "on", a first transistor TR, is turncd on and a first l~hoto- coul~ler 41 is ol~erated, thereby sul~l~lying thr l ~lwer 20 to the first load Ll.
On the othe]- hand, in the switching system in accordance with the l~resent invention, alternating current l~ower is connected to zl first load Ll through a first triac S~ as switching means. Also, second to fifth loads L~- Ls are respectively arranged in l~arallel through second 25 to fifth triacs S~~Ss. Switches MSl-MSs are located between each of triacs as electronic switching means and loads, and have functions of controlling loads electronically and mrrh~nir~lly. Here, the electronic switching means can utilize coil-type relay. When a first contactor M, contacts with a first node (a), the load is electronically controlled.
30 When the first switch contactor M, contacts with a second node (b), the load is mrrh,~llirally controlled. In a state that the first swit~h W09s/247s9 ~ 3 ~ ::18 col1taetor M~ col1tacts with the second node (b), that is, in ~ n~ al mechanical col1trc)l stat~, the secol1d switeh contaetor M~ l~lays a rol~
of turning on/off loads, for th~ role of whieh a tri-state mechanical switch ean be eml~loyed.
A full-wave reetifier circuit BD~ that converts alternating current into direct current is l~rovided to an alternating current inl~ut terminal.
A voltage stabilizer lO coul~led to an outl~ut terminal of the full-wave rectifier eireuit BD Drovides l~uwer sul~l~ly to the system of the l~resent invention. It can be easily understoc)d that direct current instead of alternating current is used to accoml~lish techniques of th~ l~res~nt invention .
F~~Fs not deseribed rel~resent fuses, whieh are installed in every loads and l~revent damages due to the overload.
The ol~eration of the switching system in aceordance with onc-embodiment of the l~resent invention will be deseribed below. First, if the remote eontroLer 20A generates an infrared ray sign~l for supl)lying the 170wer to the first load, the signal receiver .~OA receives the infrared ray signal su~ lied from the remote eontrol~r 20A, eonverts it to an eleetric signal and outl~uts the converted signal through a first outl~ut terminal. The outl~ut signal is matehed through the matrix 50 and modulated into a transmission signal in the signal transmitter 60. The outl~ut signal of the signal transmitter 60 is sul~l~lied to the signal deeoder 71, which decodes the transmitted eontrol signal and l~rovides the deeoded signal to the driving signal generator 73 which generates a driving signal to control the corresl~onding load through the matrix 72. The driving signal generator 73 drives the eorresl~onding LED and makes it to disl~lay the load in aetion, and at the same time turns the first transistor TRl 'on'. Aeeordingly, driving of the first photo-eoul~ler 41 malces the first triae S1 'on' and thereby the l~ower is supplied to the first load Ll. Then, only the flrst switeh 81 of the load seleetor 80 is in an -WOgs/247s9 ~18~213 ` r~ clx ~
'011' statc. This embodimellt selects a signal transmission metho(l by coding. but methods by volt~ge difference or digit~l sign~lls m~y bc em~loyed.
To understand the subject embodiment, a circuit which includes the first remote conkoller 20A, first receiver 30A and first l~ush buttol1 switches 31A-35A, is disl~osed in a first chamber. A circuit which includes the second remote controller 20B, second receiv~r 30B and secoL1d l~ush butto~l switche~ 31B~35B, is disl~osed in a second chamber. Such a constitution l~rovides to easily understc~nd the fact that the second remote controller 20B installed in the second chamber can control thc first l(~ad L~ in the first chamber.
FIGs. 2A to ''C are circuit diagrams of a switching system ill accordance with other embodiment of the l~resent invention. When coml~ared with the Pmhor:im~ont of FIG. 1, this embodiment is identical to that of FIG.1 ~ ith th~ excel~tion that each of loads is controlled through the driving sign~l generator 73 of the first chamber The coml~onents which l~erform the same functions as in FIG. 1 are n~2t~1 with th~ same reference numerals. Accordingly, the second to fifth load conh-olling units 200B ~ 200E include only the signal transmitters 60 each of which is connected to the signal decoder 71 of the first load cont~ olling unit 200A. Thus, we can fully know that even though any switch set of the electronic switching means 100 installed in any ch;lmber worlis, the identical signal is sul~l~lied to the signal decoder 71 of the first load controlling unit 200A via the signal transmitter (;0 of t~le load controlling units 200A~200E connected with each switch set. Those of ordinary skill in the art call fully understand without further description concerning the constitLltion and operation of the suhject Pmll~lim.ont FIGs. 3A and 3B are circuit diagrams of a switching system in accordance with another rmho~lim~nt of the l~resent invention This embodiment provides a switching system which can warn against ~ WO 95124759 ~! 1 8 ~ 3 J ~ C 18 emergency betwe~ll isolated l~laces. When coml~arecl with th~
embodimellt of FIG 1, this embodiment is equal to th~t of FIG.1 with the excel~tion that the io~ld selectors ~0 included in the load controlling units 200A ~ 200E are removed, and thereby the outl~uts from each of 5 transistors are combined and electrically connected t() the corresl~onding l~hoto-coul~ler, and means for warning, for examl~le, a sl~eal;er is further provided.
Therefore, if a control signal is sul~l~lied from any switch set installed in isolated l~laces, all the loads are ~im~ ousl~ ol~erated 10 and then the load c~)ntrolling units 200A~200E disl~lay a corresl~ondin~
l~osition through LED. Accordingly, a warning against the l~lace where a state of emergency occurs is given.
FIG. 4 is a circuit diagram of a switching system in accordance with furth~r another embodiment of the llresent invention. The device 15 of FIG. 4 is coml~osed of microchil~s eml~loyed with all integrated circuit of I~';57C501G or IiS57C240~, and l~articularly comprises a microcoml~uter and peripheral machineries which l~rogram the basic SPEC. The device of this embodiment designates each load as each of different addresses (I~rol~er number), and controls it on the basis of 20 the address. That is, a resl~ective switch endows different signals, and includes a load selector 92 in which both each load an~l switch for controlling the load are electrically selected and connected. A remote signal receiving l~ortion 91 receives a power control signal which is transmitted in an infrared form from the remote controller (not shown) 25 and sul~plies the signal to the mi.lu.or~ u~ 90. In the case that ~
addresses for each of loads may be d~ n~r~rl used is a load selector 92 eml~loying an integrated circuit of ~M93C4~i. A
transmitting-receiving unit 9~, eml~loyed by an integrate~l circuit of 74HC07, receives and transmits signals between other units which are 30 similar to the device of FIG.4.
Frist and second driving controllers 94 and 94', which may W0 9s/24759 ~ 1 8 5 ~ ~ ~ P~l1~3. l~ ~

employ integratcd circuits of RA2fi51 and I~A2657 resl~ectively, drive a LED disl~lay unit 9~ in order to disl~lay the opcration of a certain loa~l in response to ail output signal of the microcoml~uter 90. On the other hand, a loac~ controller 96 controls the powcr sullply to thc 5 corresponding load in response to an output signal of the microcoml~uter 90. A second s~itching unit lOI is installed between an output terminal of the load controller 96 and the load, in which z tri-state mech.lnical gwitch lies so that its mechanical tyl~e mcly b~
switched ill case tllat its electronic tylle is out of order. In addition, 10 the device of FIG. 4 further comprises a button-tyl~ed first switchin~
unit 97. a confirmatory unit 98 and a load control limit unit 99.
FIG. 5A is ~ concrete circuit diagram for coml~onents of th~
embodiment of FI~, with which the ol~eration state and process of each component~s will be further described. The microcomputer 90 15 controls th~ switching ol~eration of a switching unit 97, coml~c)se~l of a l~lurality of switches 1--20, S)--Ss, controls so that a rem()te signal of the remote receiving unit 91 ma~ be supl~lied to the load controller 96, and drives transistors and coil-type relay according to the sul~l~lied outl~ut signal, thereby making the load on or off. Also, the same 20 signal is sul~plied to the driving controllers 94 and 94' and an c~n/off state is displayed red or green, separately.
The switchine system of FIG. 5A has the same constituti~n as that of FIG.4, but is composed of a plurality of units, in which tr,~ngmitting-receiving unit 93 is installed so that tbe same action such 25 as tr:~ncmisci-ln oE the same signal may be made. The switches S,--Ss of tbe switcbin~ unit 97 are designed to control easily in th~
switch set of each room, and then the load selector 92, EEPROM for setting an address, can be included so tbat a specific load may be regulated by any button among each switch. Moreover, the device 30 comprises the load control limit unit 99 for limiting an on/off ol~eration with respect to any sl~ecific load, and the confirmatory unit 98 for Wo gs/247s9 Z 1 8~2 ~ 3 ~ 18 l~erforr~iing ALL OFF act;on and confirming a state of th~ LED
disl~lay.
The device of FIG. 5B is the same constitution and function as that of FIG. 5A with the exception that the EEPROM for setting an 5 address is rel~laced with a DIP switch, in coml~arison with the device of FIG. 5A, and a l~art of function is omitted ancl simplified.
Accordingly, since curtailment of manufacturing cost due to the omission and reduction of a l~art of functions is achieved, and in the constitution of the l~resent invention, a scheme that FIG. 5A is utilized 10 as a main control switch and FIG. 5B as a sub-control switch call be considered. In this matter, the main control switch unit can em~ y EEPROM and the sub-control switch unit can use the DIP switch for the address setting of each load. In this case that the classifie~l main control switch unit and sub-control switch unit are connected to the 15 switching system of the present invention, the main contrc)l switch unit can l~erform all functions for turning on/off all loads connected to the system and for monitoring their on/off states, where~s the sub-control switch Ul~it may l~e controlled by the main control switch unit and execute only a limited function to manil~ulate on/off states of 20 the connected loads. However, Both of them are of gre~t utility in view of use and exl~ense.
FIG. 5C is a circuit diagram of a remocon in which a terminal of a radio call receiver PAGER to the exterior is incorporated, which is intended to control an on/off state of each load in the switching 25 system by phone. When the prol~er number and secret number of the radio call receiver and the designated number of the switching system are dialed, a signal of the tr,ln~mi~in~ unit 102 is sul~l~lied to the remote receiving unit 91 of FIG. 5A by the ol~eration of the microcomputer 105 and a remote control switching unit 104 through 30 exterior receiving terminal, thereby the corresl~onding load designated by the microcoml~uter 90 is controlled to turn on/off.

Wo95/24759 218~ 3 F~ll~55/~ Dl~ ~

As descril~ed abov.t,~è~a'ch switch unit connect~d to the syst~m can l~erform the assot iati-)n oDeratic)n by mutual communication.
When the l~resent invention comes into force, it is obvious in the art that a sensor for sensing h~lmall b(,dy and heat may be arranged and that a timcr, a device fur tr~n~mi~tin~, recording and tclt~recording of image and sound. auto-conncction to home, a device for signal tr~ncmis~it)n b~ wireless/wire and an alarm for disconnectioll can be further added.
FIGs. 6 and 7 show constitution and circuitry of systems for crime Dreventi()n, resl~ectively, and illustrate another cmb~)diment that the constitution and function of FlGs. :~1 and 4 ar~ al~Dlietl. Each switcll unit of I;IG. ~ i9 insta~led in each chamber of th~ door. whil~
switch units for a security system of FIG. 6 are set ul~ in the next doors joined or isolated locatiolls, resl~ectively. In case of emcrgency, first a transmission signal from switching unit 97' makes an alarm generato} 9~';' gellerate an alarm. At the same time, the LED
disl~lay unit 95' di~ lays on the LED what the corresl~onding address of the transmissior, signal flickers. In each joined h~)uses, th~ mod~
selector 98' designiltt~s its l~rol~er address. and the memor~ settill~ ~Init 92' stores the final registration number of affiliated houses so as to check a state of tlict~t)nnt~t~tifl)~ For the purl~ose of m~lximi7il~ a reach distance in mutual communication between each unit, signal ~mlllifif,l~ion or modulation in the known art can be utilized with wire/wireless communication methods.
Although furtLIer descril~tion with r~sl~ect to the rest constitution and oDeration is omitted, the above-described major Lloints of the present invention will be fully understood by those of ordinary skill in the art.

WOss/24759 2 1 85 2 1 ~ [ci~
Il INDUSTRT~T. l\P~LICARITTT~ . --As describ~d above, a switching system in accordanc~ with th~
present invention can be applied as systems for crime l~revention, 5 control a desired load in user's convenient l)lace, perform a mutual switching ol)eration by means of both a manual switch and a remote controller, display states of each load and selectively stop the ol~eration of an unused switching circuit. Therefore, the switching system l~rovides great advantages, such as convenience of user's swit~hing 10 ol~eration as well as l~l)wer-saving efficie~lcy.

Claims (14)

WHAT IS CLAIMED IS:
1. A switching system for switching power being supplied to a plurality of loads, the system, comprising:
electronic switching means, provided with at least two or more switch sets, each of which is composed of switches capable of controlling the loads respectively;
load controlling means, including a plurality of load controllers that are electrically connected to each of said switch sets, in which each of load controllers is operated according to a control signal from an optional switch set of said electronic switch means; and means for supplying the power to a desired load or for cutting off it according to all output signal from said load controlling means.
2. The switching system as claimed in claim 1, wherein said each load controller further comprises a display unit for displaying a control state of each of said loads.
3. The switching system as claimed in claim 1 or 2, wherein said each load controller further comprises a signal transmitter for coding the control signal supplied from said switch sets and transmitting the coded signal;
a signal decoder for decoding the transmitted control signal from said signal transmitter;
a driving signal generator, composed of a plurality of output terminals at least as many as loads, for outputting the output signal from said signal decoder into a binary signal form through a corresponding output terminal; and switching elements, located between each output terminal of said driving signal generator and supply/cut-off means of power.
4. The switching system as claimed in claim 3, wherein said load controlling means further comprises a load selector for electrically selecting switching operations so that only a desired control signal supplied from said electronic switch means can control a corresponding load.
5. The switching system as claimed in claim 1 or 2, further comprising selection means, coupled between each load and supply/cut-off means of power supply. for selecting electronically or mechanically a load control
6. The switching system as claimed in claim 1, wherein said switch sets are formed between the power supply part and said load controlling means in a push-button fashion.
7. The switching system as claimed in claim 6, wherein said switch sets further comprises a remote control switch.
8. A switching system for switching power being supplied to a plurality of loads, the system comprising:
at least two or more switch units which include switching means composed of switches for supplying a control signal to control said loads respectively, control signal generating means electrically connected to each switch, for being operated according to the control signal from an optional switch of said switch means, and means for displaying its control state;
transmitting-receiving means for simultaneously transmitting and receiving the control signal of said each switch unit; and means for supplying power to a desired load or cutting-off it according to the output signal from said control signal generating means of said each switching unit.
9. The switching system as claimed in claim 8 wherein said switch unit further comprises a load selector for electrically selecting and connecting each switch of said switching means and each load.
10. The switching system as claimed in claim 8 or 9, wherein said each unit further comprises a load control limit unit for cutting off a signal to control a specific load among the control signals to be supplied.
11. The switching system as claimed in claim 8 or 9, wherein further comprises selective switching unit, coupled between said control signal generating means and said load, for selectively controlling the load by any one of an electronic method or a mechanical one.
12. The switching system as claimed in claim 8, wherein said switching means comprises a remote control switch and a manual control one.
13. The switching system as claimed in claim 12 wherein said remote control switch comprises a contact terminal for a wireless call receiver
14. The switching system as claimed in claim 8, wherein the display units of said units represent signal transmission units.
CA002185213A 1994-03-11 1995-03-10 A switching system Abandoned CA2185213A1 (en)

Applications Claiming Priority (14)

Application Number Priority Date Filing Date Title
KR19940004938 1994-03-11
KR94-4938 1994-03-11
KR19940005258 1994-03-16
KR94-5258 1994-03-16
KR94-14859 1994-06-27
KR19940014859 1994-06-27
KR94-16035 1994-07-05
KR19940016035 1994-07-05
KR94-27095 1994-10-22
KR19940027095 1994-10-22
KR19940030979 1994-11-23
KR94-30979 1994-11-23
KR95-2959 1995-02-16
KR1019950002959A KR0163940B1 (en) 1994-03-11 1995-02-16 Switching system

Publications (1)

Publication Number Publication Date
CA2185213A1 true CA2185213A1 (en) 1995-09-14

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Application Number Title Priority Date Filing Date
CA002185213A Abandoned CA2185213A1 (en) 1994-03-11 1995-03-10 A switching system

Country Status (7)

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EP (1) EP0749642A1 (en)
JP (1) JPH10500556A (en)
KR (1) KR0163940B1 (en)
CN (1) CN1144576A (en)
AU (1) AU1961595A (en)
CA (1) CA2185213A1 (en)
WO (1) WO1995024759A1 (en)

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IT1256105B (en) * 1992-11-12 1995-11-28 Valerio Narduzzo CONSUMPTION MANAGEMENT AND CONTROL DEVICE, PARTICULARLY FOR CIVIL ELECTRICAL SYSTEMS

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CN1144576A (en) 1997-03-05
AU1961595A (en) 1995-09-25
EP0749642A1 (en) 1996-12-27
JPH10500556A (en) 1998-01-13
WO1995024759A1 (en) 1995-09-14
KR0163940B1 (en) 1999-03-20

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