GB474140A - Improvements in and relating to methods of testing electric circuit breakers - Google Patents
Improvements in and relating to methods of testing electric circuit breakersInfo
- Publication number
- GB474140A GB474140A GB9534/37A GB953437A GB474140A GB 474140 A GB474140 A GB 474140A GB 9534/37 A GB9534/37 A GB 9534/37A GB 953437 A GB953437 A GB 953437A GB 474140 A GB474140 A GB 474140A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- breaker
- voltage
- circuit
- units
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/333—Testing of the switching capacity of high-voltage circuit-breakers ; Testing of breaking capacity or related variables, e.g. post arc current or transient recovery voltage
- G01R31/3333—Apparatus, systems or circuits therefor
- G01R31/3336—Synthetic testing, i.e. with separate current and voltage generators simulating distance fault conditions
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
474,140. High - tension switches. BRITISH THOMSON-HOUSTON CO., Ltd. April 3, 1937, No. 9534. Convention date, April 3, 1936. [Class 38 (v)] An arrangement for testing a circuit-breaker comprises a relatively low voltage source of current adapted to be short-circuited by the breaker adapted to open the short-circuit, and means for subjecting the breaker to a recovery-voltage of greater magnitude than would be available from the current-source immediately upon interruption of current by the breaker. In Fig. 1, the breaker 11 under test is connected in series with an auxiliary, and preferably similar, breaker 12 across a source 13 capable of supplying full testing current. An autotransformer or, as shown, a two-winding step-up transformer 21 has its secondary 23 connected across breaker 11 so as to supply full voltage to the latter, and suitable apparatus, such as an oscillograph 24, is also provided. With both breakers 11, 12 closed, the desired current is passed through by energizing source 13 and closing switch 14, or vice versa, whereupon both breakers are opened simultaneously. If both finally interrupt the current simultaneously, breaker 11 has interrupted the desired current and been subjected to the desired recovery voltage by winding 23. The Specification points out, with reasons, the importance of simultaneous clearing of the current, and that if simultaneity is departed from, breaker 11 must clear within a very short interval after breaker 12. The method is accordingly well adapted to impulse and cross-blast types of breakers, and if it is applied to other types, a large number of tests should be made and the results discarded where 11 cleared first or 12 cleared too long before 11. In order to reduce the timeinterval, impedances 27, 28 may be arranged in the transformer circuits to hold back the application of the voltage until the breakers are ready to interrupt and thus cause simultaneous interruption. Such arrangement is also shown in Fig. 4, in which a breaker comprises two units 30, 31 with series-breaks arranged in hollow oil-filled insulators, and a common operating mechanism. The current is supplied to the units in series from a transformer 40, across which is the primary 22 of an autotransformer the secondary 23 of which supplies the tested unit, shown at 31, over a spark-gap 45. This gap opens the external circuit to terminal 36, and so the currents in the units are equal and clear simultaneously. The gap is set so as only to break down at a voltage appreciably higher than the arcvoltage, so that it prevents current-flow in its high-voltage circuit while the units shortcircuit the source, but applies the high-voltage immediately the short-circuit current ceases. The gap-resistances may be reduced after it has broken down, by igniting combustible gas supplied from a rubber hose H and nozzle N. The units 30, 31 may be tested in turn by interchanging the connections to terminals 37, 38, and oscillograph-transformers 43, 44 are provided. In a modification of Fig. 1, the short-circuit current may be supplied from a two-winding transformer, Fig. 3 (not shown) and in a further modification, Fig. 2 (not shown) three star-connected switches are tested by a three-phase supply, utilizing an autotransformer to supply each with the necessary recovery-voltage.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US474140XA | 1936-04-03 | 1936-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB474140A true GB474140A (en) | 1937-10-26 |
Family
ID=21948831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9534/37A Expired GB474140A (en) | 1936-04-03 | 1937-04-03 | Improvements in and relating to methods of testing electric circuit breakers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB474140A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2203559A (en) * | 1987-04-08 | 1988-10-19 | Vacuum Interrupters | Testing of vacuum interrupters |
CN111398800A (en) * | 2020-03-18 | 2020-07-10 | 山东钢铁股份有限公司 | Circuit breaker fault finding method |
CN111751621A (en) * | 2020-05-14 | 2020-10-09 | 广西电网有限责任公司电力科学研究院 | Detection method for secondary circuit of high-voltage circuit breaker |
-
1937
- 1937-04-03 GB GB9534/37A patent/GB474140A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2203559A (en) * | 1987-04-08 | 1988-10-19 | Vacuum Interrupters | Testing of vacuum interrupters |
CN111398800A (en) * | 2020-03-18 | 2020-07-10 | 山东钢铁股份有限公司 | Circuit breaker fault finding method |
CN111751621A (en) * | 2020-05-14 | 2020-10-09 | 广西电网有限责任公司电力科学研究院 | Detection method for secondary circuit of high-voltage circuit breaker |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB474140A (en) | Improvements in and relating to methods of testing electric circuit breakers | |
US3373350A (en) | Apparatus for testing the arc capability of an electrical circuit breaker | |
US2825005A (en) | Operating circuits for electrical discharge lamps | |
US2088445A (en) | Circuit breaker testing arrangement | |
GB904829A (en) | Improvements in or relating to the testing of high-voltage switches | |
US2303825A (en) | Electric circuit breaker | |
GB422775A (en) | Improvements relating to electric switches for alternating current | |
GB1582932A (en) | Synthetic testing apparatus for circuit breakers | |
US3038116A (en) | Circuit-breaker testing arrangement | |
US2657354A (en) | Testing arrangement for circuit interrupting devices | |
GB612219A (en) | Improvements in circuits and in apparatus for indirect testing processes, to determine the making and breaking capacity of electric switches and circuit breakers | |
GB958911A (en) | Improvements relating to apparatus for testing electrical circuit breakers | |
GB1562678A (en) | Arrangement for testing thre-pole high-voltage circuit breakers | |
GB961882A (en) | Improvements relating to apparatus for testing electrical circuit breakers | |
SU86166A1 (en) | Device for testing high voltage circuit breakers | |
CN1006577B (en) | Method for limiting and detecting arcing period in line breaker | |
JPS59126269A (en) | Synthesis testing method of gas circuit breaker | |
DE1021479B (en) | Procedure for the continuation of an arc in the case of circuit breakers to be tested in test arrangements with separate energy sources | |
SU532828A1 (en) | Circuit Breaker Capability Tester | |
GB712239A (en) | Improvements in or relating to circuit arrangements for operating low pressure electric discharge lamps | |
GB366966A (en) | Improvements in and relating to electric circuit breakers | |
Smeets et al. | Development of synthetic test methods for high-voltage circuit breakers 145–1200 kV | |
DE923150C (en) | Procedure and arrangement for the indirect testing of circuit breakers | |
GB1535814A (en) | Synthetic testing apparatus for circuit breakers | |
GB919622A (en) | A testing arrangement for high-voltage circuit-breaker |