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Current-measuring apparatus, series of current-measuring apparatuses, and method for measuring current

A current measurement device and series of technologies, applied in the direction of measurement device, measurement of electrical variables, measurement of current/voltage, etc., can solve the problems of complex load conversion mechanism, and achieve the reduction of the number of spare parts variants, low test costs, and less preparation area. Effect

Inactive Publication Date: 2019-06-04
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The load switching mechanism with multiple parallel loads is based on the fault-free control of multiple switches by the microcomputer according to the stored combination table, however, this load switching mechanism is relatively complicated

Method used

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  • Current-measuring apparatus, series of current-measuring apparatuses, and method for measuring current
  • Current-measuring apparatus, series of current-measuring apparatuses, and method for measuring current
  • Current-measuring apparatus, series of current-measuring apparatuses, and method for measuring current

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Embodiment Construction

[0032] Figure 1 to Figure 3 Three different connection combinations with secondary coil 20 and series circuit 6 formed by loads 61 , 62 are shown.

[0033] figure 1 A first embodiment of the current measuring device 100 according to the invention is shown. The current measuring device 100 has an assembly 2 with two loads 61 , 62 in a series circuit 6 . The series circuit 6 comprises a first load 61 between the first contact point 18a and the second contact point 18b and a second load 62 between the second contact point 18b and the third contact point 18c. Furthermore, the current measuring device 100 has a current transformer module 4 a with a secondary coil 20 . The terms "contact" and "contact location" are used synonymously in the description.

[0034] The current measuring device 100 also has a plug connector 12 with three poles 13a, 13b, 13c, by means of which the current transformer module 4a is detachably connected to the assembly 2 during the plug-in process. The...

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Abstract

The invention relates to a current-measuring apparatus (100) having an assembly (2) with two or more loads (61, 62, 63) in a series connection circuit (6) and a current transformer module (4, 4a, 4b,4c) with a secondary coil (20). Herein, the series connection circuit (6) includes three or more contacts (18a, 18b, 18c, 18d) so that the connection combinations of the secondary coil (20) to in eachcase two of the three or more contacts (18a, 18b, 18c, 18d) enables different groups of one or more loads (61, 62, 63) to be switched with the secondary coil (20) to form an electric circuit. A secondary current induced by a primary current (22) to be measured in the secondary coil (20) is able to flow through the electric circuit formed in this way.

Description

technical field [0001] The invention relates to a current measuring device, a structural series of a current measuring device and a current measuring method. Background technique [0002] Current transformers are known, see eg DE 10 2006 059 384 A1 (Siemens AG) of 26 June 2008 and WO 2012 / 022377 A1 of 23 February 2012 (Siemens AG). The detection of different operating states, some with very high currents and some with very low currents, places high demands on the current transformers, which must be suitable for measuring high and low currents accordingly. Current transformers generally operate based on inductance, which is used to detect on the primary side a primary current to be measured, through which a secondary current is brought about on the secondary side of the current transformer that drops in level. The current transformers are thus used on the one hand for potential separation and on the other hand for signal level reduction. The level of the secondary current d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
CPCG01R15/18G01R19/0092
Inventor 迪尔克·赫兹弗洛里安·林格
Owner SIEMENS AG