GB1286227A - Device for monitoring a current flowing through the primary winding of a current transformer - Google Patents
Device for monitoring a current flowing through the primary winding of a current transformerInfo
- Publication number
- GB1286227A GB1286227A GB2241871A GB2241871A GB1286227A GB 1286227 A GB1286227 A GB 1286227A GB 2241871 A GB2241871 A GB 2241871A GB 2241871 A GB2241871 A GB 2241871A GB 1286227 A GB1286227 A GB 1286227A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistor
- current
- circuit
- monitoring
- current flowing
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
1286227 Protective arrangement HARTMANN & BRAUN AG 19 April 1971 [2 March 1970] 22418/71 Heading H2K In an arrangement responsive to current flowing through the primary windings of current transformers W1 ... W3, a bridge rectifier 4 is connected to the secondary windings and energizes a coil 8 in the magnetic field of which there is a magnetic-field-responsive resistor 9. This resistor is connected in series with a constant. current source 11 and a trigger circuit 10 is connected for energization by the difference between the voltage drop across the resistor 9 and that established at a tapping 15 of a potential divider 12, 13 connected across a battery (not shown). When the current in the A.C. circuit R, S, T reaches a predetermined level, the resistance of the resistor 9 is changed sufficiently to cause the circuit 10 to change its state, e.g. to energize a relay (not shown) to effect an indicating or tripping action.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2009584 | 1970-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1286227A true GB1286227A (en) | 1972-08-23 |
Family
ID=5763730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2241871A Expired GB1286227A (en) | 1970-03-02 | 1971-04-19 | Device for monitoring a current flowing through the primary winding of a current transformer |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH513538A (en) |
| GB (1) | GB1286227A (en) |
| SE (1) | SE364820B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3023273C2 (en) * | 1980-06-21 | 1983-12-01 | Aeg-Elotherm Gmbh, 5630 Remscheid | DC power source for an electrolytic machining facility |
| DE3109330A1 (en) * | 1981-03-12 | 1982-09-23 | Hartmann & Braun Ag, 6000 Frankfurt | CIRCUIT ARRANGEMENT FOR SUPPLYING OVERCURRENT RELAY |
-
1971
- 1971-02-18 CH CH238071A patent/CH513538A/en not_active IP Right Cessation
- 1971-03-01 SE SE257471A patent/SE364820B/xx unknown
- 1971-04-19 GB GB2241871A patent/GB1286227A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH513538A (en) | 1971-09-30 |
| SE364820B (en) | 1974-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |