GB1176014A - A Circuit Arrangement for Testing One or More Selected Relays in a Switching Matrix. - Google Patents
A Circuit Arrangement for Testing One or More Selected Relays in a Switching Matrix.Info
- Publication number
- GB1176014A GB1176014A GB1614267A GB1614267A GB1176014A GB 1176014 A GB1176014 A GB 1176014A GB 1614267 A GB1614267 A GB 1614267A GB 1614267 A GB1614267 A GB 1614267A GB 1176014 A GB1176014 A GB 1176014A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- relays
- current
- test
- current supply
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles
- H04Q1/22—Automatic arrangements
- H04Q1/24—Automatic arrangements for connection devices
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Tests Of Electronic Circuits (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Abstract
1,176,014. Automatic switching systems. BOLKOW G.m.b.H. 7 April, 1967 [9 April, 1966], No. 16142/67. Heading H4K. In setting up connection over a matrix 3 of relays, the relays being of assorted type, a marker 5 selects a particular relay or relays for operation and indicates to a current supply device 1 the particular value of current required for that relay or relays, the current supply being controlled by a circuit 4 which first applies current of half the required holding value so that a circuit 2 can conduct a test on the voltage dropped across the chosen relay or relays, the current being momentarily increased to a value to operate the relay or relays, if the test is satisfactory, and is thereafter supplied at full holding current level. If the test is not satisfactory, the voltage drop across the relay or relays being greater or less than expected, the current supply is disconnected and a fault signal is generated. Selection of the current level required by each relay is indicated by connections from each relay winding to one, two, or three of the leads 11, 12, 13. The voltages appearing on these leads when a relay is selected by the marker causes corresponding resistors to be switched in parallel with, the emitter resistor of a transistor which provides the current supply. The test circuit 2 comprises two transistor voltage threshold circuits which, in comparison with the reference voltage of a Zener diode indicate whether the voltage drop across the selected relay is above or below acceptable values.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1966B0086617 DE1273008B (en) | 1966-04-09 | 1966-04-09 | Circuit arrangement for switching through and checking for correct marking of several different types of relay in a coupling network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1176014A true GB1176014A (en) | 1970-01-01 |
Family
ID=6983451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1614267A Expired GB1176014A (en) | 1966-04-09 | 1967-04-07 | A Circuit Arrangement for Testing One or More Selected Relays in a Switching Matrix. |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1273008B (en) |
| GB (1) | GB1176014A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2446574A1 (en) * | 1979-01-15 | 1980-08-08 | Constr Telephoniques | Telephone relay current control - monitors current drawn by relays using common detector, removes supply on detecting excess and periodically re-checks circuit (BR 23.9.80) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1186913B (en) * | 1963-03-26 | 1965-02-11 | Siemens Ag | Method and circuit arrangement for avoiding incorrect settings in telephone switching systems |
| DE1186516B (en) * | 1963-09-25 | 1965-02-04 | Telefunken Patent | Circuit arrangement for telephone exchanges for error detection in connection devices |
-
1966
- 1966-04-09 DE DE1966B0086617 patent/DE1273008B/en active Pending
-
1967
- 1967-04-07 GB GB1614267A patent/GB1176014A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2446574A1 (en) * | 1979-01-15 | 1980-08-08 | Constr Telephoniques | Telephone relay current control - monitors current drawn by relays using common detector, removes supply on detecting excess and periodically re-checks circuit (BR 23.9.80) |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1273008B (en) | 1968-07-18 |
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