GB1076695A - Improvements relating to circuits for the synthetic testing of high-voltage electric circuit-breakers - Google Patents
Improvements relating to circuits for the synthetic testing of high-voltage electric circuit-breakersInfo
- Publication number
- GB1076695A GB1076695A GB2922963A GB2922963A GB1076695A GB 1076695 A GB1076695 A GB 1076695A GB 2922963 A GB2922963 A GB 2922963A GB 2922963 A GB2922963 A GB 2922963A GB 1076695 A GB1076695 A GB 1076695A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- test
- voltage
- circuit breaker
- breaker
- 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
Abstract
1,076,695. Testing circuit breakers. REYROLLE & CO. Ltd. Oct. 22, 1964 [July 23, 1963], No. 29229/63. Heading G1U. A synthetic testing circuit for testing a circuit breaker having one or more low value shunt resistors is of the kind comprising a low voltage circuit whereby a fault current at low voltage is supplied to the test circuit breaker so as to create the required arcing conditions prior to current interruption, and a high voltage circuit, including a voltage injection source capacitor and an inductance, whereby a high frequency current pulse is supplied to the test circuit breaker immediately before the current interruption and the required high voltage across the test circuit breaker is applied immediately following current interruption; an auxiliary circuit breaker being connected in series with the test circuit breaker in the low voltage circuit and one or more capacitors being connected across the test circuit breaker to produce the required transient voltage conditions immediately after current interruption. According to the invention, when such a synthetic testing circuit is used to test a circuit breaker with one or more low value shunt resistors, the or each resistor is disconnected from across the test circuit breaker and is connected, wholly or in part, in parallel with the inductance in the high frequency high voltage injection circuit. In a parallel test circuit (Fig. 3) wherein the high current from a source nE and high frequency high voltage from capacitor Cs are applied to the test breaker T in parallel, the whole of the shunt resistor or resistors is connected across the inductance L in the voltage circuit. In a series test circuit Fig. 6 (not shown) wherein the high current from a source nE and high voltage from a capacitor Cs are applied in series to the test breaker T, only a proportion (1-n)R of the shunt resistor or resistors is connected across the inductance in the high voltage circuit. The remainder, nR, is connected in parallel with a capacitor Cr, which influences the transient voltage conditions after current interruption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2922963A GB1076695A (en) | 1963-07-23 | 1963-07-23 | Improvements relating to circuits for the synthetic testing of high-voltage electric circuit-breakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2922963A GB1076695A (en) | 1963-07-23 | 1963-07-23 | Improvements relating to circuits for the synthetic testing of high-voltage electric circuit-breakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1076695A true GB1076695A (en) | 1967-07-19 |
Family
ID=10288191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2922963A Expired GB1076695A (en) | 1963-07-23 | 1963-07-23 | Improvements relating to circuits for the synthetic testing of high-voltage electric circuit-breakers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1076695A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684331A (en) * | 2020-12-15 | 2021-04-20 | 日立楼宇技术（广州）有限公司 | Method, device and equipment for monitoring service life of contactor and storage medium |
-
1963
- 1963-07-23 GB GB2922963A patent/GB1076695A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684331A (en) * | 2020-12-15 | 2021-04-20 | 日立楼宇技术（广州）有限公司 | Method, device and equipment for monitoring service life of contactor and storage medium |
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