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Circuit devices for electrical protection devices

A technology of protection device and circuit device, applied in emergency protection circuit device, circuit device, parts of emergency protection device, etc., can solve problems such as cost and achieve the effect of reliable control

Active Publication Date: 2019-04-30
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All described embodiments require additional installation space in the electrical protective device and entail additional costs

Method used

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  • Circuit devices for electrical protection devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] attached figure 1 A schematic diagram of a circuit arrangement 10 for an electrical protective device is shown. Such an electrical protection device may be a residual current detector (Residual Current Detector: residual current detector, RCD) or a fault arc protection device (Arc Fault Detection Device: arc fault detection device, AFDD). The circuit arrangement 10 has a first electrical line 12 and a second electrical line 14 . The electrical lines 12 , 14 are connected to an electrical supply (not shown here), for example to an energy supply network. A voltage U, in particular an alternating voltage, is applied between the two electrical lines 12 , 14 . In this case, the second electrical line is connected to the ground terminal 20 .

[0025] Furthermore, the circuit arrangement 10 has an electromagnetic isolating device 16 with a coil L1 and a push rod, not shown here. The electromagnetic separation device 16 is established according to the moving coil principle....

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Abstract

A circuit arrangement 10 for an electric protective device comprises a first electric line 12, an electromagnetic isolating device 16 of a coil and plunger type, a switching device T1, a voltage divider 22 and a control device 18. The control device 18 detects the presence of a fault current and / or an arc in / on the electric line 12 and generates a trigger signal trig that activates the switching device T1. Once activated, the switching device T1, which may be a thyristor, allows a voltage U to be applied to the electromagnetic isolating device 16 and thereby isolates the electric line 12. The control device 18 is embodied to detect a zero crossing of the electric voltage U and to generate a trigger signal trig after a specified time or interval of time after the detected zero crossing, or at a particular voltage phase, so that the overall energy absorbed by the coil is controlled. The limits of a time interval may be calculated from static and / or dynamic force measurements on the electromagnetic isolating device 16 or an operating temperature of the electromagnetic isolating device 16.

Description

technical field [0001] The invention relates to a circuit arrangement for an electrical protection device. Furthermore, the invention relates to a method for operating an electrical protective device. Background technique [0002] Electrical protection devices are commonly used in electrical installation systems. Examples of electrical protective devices are overcurrent protective devices and arc fault protective devices for protecting electrical installations from damage by arc faults, by means of which fault current protective devices can prevent fault currents from being grounded. Protective devices generally require circuit arrangements with analog and / or digital components, by means of which fault currents or arcs can be detected. Furthermore, a trigger signal for actuating the disconnecting device can be output by means of such a circuit arrangement, which triggers the electrical disconnection of the electrical circuit or line of the installation system in which a fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/16H01H47/32H02H7/26
CPCH01H47/22H02H3/021H02H1/0015H02H3/32
Inventor A.许贝尔J-M.马特尔A.彼得斯
Owner SIEMENS AG