GB1005942A - Improved arrangement for testing electric switchgear - Google Patents
Improved arrangement for testing electric switchgearInfo
- Publication number
- GB1005942A GB1005942A GB3676062A GB3676062A GB1005942A GB 1005942 A GB1005942 A GB 1005942A GB 3676062 A GB3676062 A GB 3676062A GB 3676062 A GB3676062 A GB 3676062A GB 1005942 A GB1005942 A GB 1005942A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- breaker
- diode
- switch
- branch
- 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 Electric Properties And Detecting Electric Faults (AREA)
Abstract
1,005,942. Testing circuit breakers. LICENTIA PATENT-VERWALTUNGS G.m.b.H. Sept. 27,1962, No. 36760/62. Heading_G1U. An arrangement for testing circuit breakers comprises a circuit branch containing an A.C. power source and another branch containing a second source of electrical oscillations of higher frequency than those from the first source. The two sources are each individually series connected with a switch and are each parallel connected across the breaker to be tested, a unidirectional current carrying device being connected in each branch to stop the voltage front produced in the other branch. In the embodiment described for testing the circuit breaker P the A.C. power source G is included in a circuit including an inductor L, a capacitor K 1 , and a switch H. In parallel with the switch H is a series arrangement of a diode G H , capacitor C H and inductor L H . The other circuit connected across the breaker P is designed to produce oscillations whose frequency is higher than that of the power source G. Two spark gaps F 1 , F 2 are included and the striking of these is controlled by a device St in response to a signal derived from a saturable current transformer W coupled to the power circuit. Also included in the circuit are two capacitors C and K 2 , (which sets the frequency), an inductance Ls and a diode Gs in parallel with the spark gap F 1 . In operation, the switch H is opened so that a steep fronted recovery voltage is applied through the diode G H to the circuit breaker P. When the current is in the oscillation branch passes through zero a voltage is applied from the capacitor K 2 through the diode Gs to the circuit breaker, this voltage rising slowly at first but becoming predominant after a short interval. This arrangement simulates the conditions which may be expected when a breaker is operated on duty, where the characteristics of the wave front appearing across the breaker contacts are determined by the power source and by the line portion between the fault and circuit-breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3676062A GB1005942A (en) | 1962-09-27 | 1962-09-27 | Improved arrangement for testing electric switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3676062A GB1005942A (en) | 1962-09-27 | 1962-09-27 | Improved arrangement for testing electric switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1005942A true GB1005942A (en) | 1965-09-29 |
Family
ID=10390982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3676062A Expired GB1005942A (en) | 1962-09-27 | 1962-09-27 | Improved arrangement for testing electric switchgear |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1005942A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1074850A2 (en) * | 1999-07-05 | 2001-02-07 | ABB Hochspannungstechnik AG | Circuit for the synthetic testing of the switch capability of high voltage switches |
| EP1475645A1 (en) * | 2003-05-06 | 2004-11-10 | Ernst Slamecka | Synthetic testing circuit for high voltage alternating current circuit breakers |
-
1962
- 1962-09-27 GB GB3676062A patent/GB1005942A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1074850A2 (en) * | 1999-07-05 | 2001-02-07 | ABB Hochspannungstechnik AG | Circuit for the synthetic testing of the switch capability of high voltage switches |
| EP1074850A3 (en) * | 1999-07-05 | 2001-07-18 | ABB Hochspannungstechnik AG | Circuit for the synthetic testing of the switch capability of high voltage switches |
| EP1475645A1 (en) * | 2003-05-06 | 2004-11-10 | Ernst Slamecka | Synthetic testing circuit for high voltage alternating current circuit breakers |
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