CH562506A5CH534274ACH534274ACH562506A5CH 562506 A5CH562506 A5CH 562506A5CH 534274 ACH534274 ACH 534274ACH 534274 ACH534274 ACH 534274ACH 562506 A5CH562506 A5CH 562506A5
Authority
CH
Switzerland
Application number
CH534274A
Original Assignee
Sprecher & Schuh Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sprecher & Schuh AgfiledCriticalSprecher & Schuh Ag
Priority to CH534274ApriorityCriticalpatent/CH562506A5/xx
Priority to AT83575Aprioritypatent/AT346968B/de
Priority to DE19752516724prioritypatent/DE2516724A1/de
Publication of CH562506A5publicationCriticalpatent/CH562506A5/xx
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D17/00—Caps for supporting mine roofs
E—FIXED CONSTRUCTIONS
E21—EARTH OR ROCK DRILLING; MINING
E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
H01F27/00—Details of transformers or inductances, in general
H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
H01F27/422—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers
H01F27/427—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers for current transformers
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
H01F38/00—Adaptations of transformers or inductances for specific applications or functions
H01F38/20—Instruments transformers
H01F38/22—Instruments transformers for single phase AC