Indoor three-phase electronic current transformer
A current transformer, electronic technology, applied in the direction of inductors, transformers/inductor shells, transformers/inductor coils/windings/connections, etc., can solve the problem that electromagnetic current transformers cannot meet the needs of power system automation and digital processing development Requirements and other issues, to achieve the effect of perfect and reliable performance, simple and economical structure, and advanced functions
Inactive Publication Date: 2020-06-30
DALIAN NORTH INSTR TRANSFORMER GROUP
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Problems solved by technology
[0003] In view of the above problems, the purpose of the present invention is to provide an indoor three-phase electronic current transformer to solve the problem that the traditional electromagnetic current transformer cannot meet the development requirements of power system automation and digital processing.
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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0021] Such as Figure 1-3 As shown, an indoor three-phase electronic current transformer provided by the present invention includes an insulator 8 and an A-phase coil 3, a B-phase coil 4, a C-phase coil 5 and a zero-sequence coil 6 sealed in the insulator 8. Among them, the A-phase coil 3, B-phase coil 4, and C-phase coil 5 are equidistantly set inside the zero-sequence coil 6, and the secondary lead terminal 7 of the A-phase coil 3, B-phase coil 4, C-phase coil 5 and zero-sequence coil 6 Set on the bottom of one side of the insulator 8, the secondary lead-out line of the A-phase coil 3 is connected in parallel with the A-phase sampling resistor 11, the secondary lead-out line of the B-phase coil 4 is connected in parallel with the B-phase sampli...
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The invention relates to a high-voltage measurement and protection device of a power system, in particular to an indoor three-phase electronic current transformer. The transformer comprises an insulator, an A-phase coil, a B-phase coil, a C-phase coil and a zero-sequence coil which are sealed in the insulator. The A-phase coil, the B-phase coil and the C-phase coil are sleeved in the zero-sequencecoil at equal intervals; secondary lead terminals of the A-phase coil, the B-phase coil, the C-phase coil and the zero-sequence coil are arranged at the bottom of one side of the insulator; a secondary leading-out wire of the A-phase coil is connected with an A-phase sampling resistor in parallel, a secondary leading-out wire of the B-phase coil is connected with a B-phase sampling resistor in parallel, a secondary leading-out wire of the C-phase coil is connected with a C-phase sampling resistor in parallel, and a secondary leading-out wire of the zero-sequence phase coil is connected with azero-sequence sampling resistor in parallel. The transformer can be conveniently connected with interfaces of a digital instrument and microcomputer protection control equipment to realize the functions of metering, control, measurement, protection and data transmission.
Description
technical field [0001] The invention relates to a high-voltage measurement and protection device for a power system, in particular to an indoor three-phase electronic current transformer. Background technique [0002] Electronic current transformer is one of the key equipment to meet the development of high-voltage electrical equipment in modern power systems in the direction of intelligence, modularization, miniaturization, multi-function and maintenance-free, and it is also the need for automation and digital development of power systems. Modern microcomputer comprehensive measurement protection devices and instruments no longer need transformers to provide energy to work, only need transformers to collect and transmit primary current information in a complete, timely and accurate manner, only a few volts of voltage signals and poles are needed. Small power can meet its interface requirements. It is difficult for traditional electromagnetic current transformers to directly...
Claims
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Login to View More IPC IPC(8): H01F27/02H01F27/06H01F27/28H01F27/29H01F27/30H01F27/40H01F38/30
CPCH01F27/022H01F27/06H01F27/28H01F27/29H01F27/303H01F27/40H01F38/30
Inventor 李涛昌王仁焘宋仁丰赵阳武高琦初立成王振宇
Owner DALIAN NORTH INSTR TRANSFORMER GROUP