A selective protection circuit, method and power supply system
A protection circuit and selective technology, which is applied in the direction of emergency protection circuit devices, circuit devices, control/regulation systems, etc., can solve problems such as power outages of communication equipment, and achieve the effect of preventing power outages
Active Publication Date: 2017-07-21
HUAWEI TECH CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Embodiments of the present invention provide a selective protection circuit, method and power supply system, which are used to solve the problem that some important communication equipment may be powered off due to excessive short-circuit current
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0047] The character " / " in this article generally indicates that the contextual objects are an "or" relationship. In addition, the term "plurality" herein means two or more.
[0048] The embodiment of the present invention provides a selective protection circuit A, which is applied to the scene of using HVDC power supply, and the HVDC power supply supplies power to at least two load branches connected in parallel, and each load branch includes a pre-regulated v...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a selective protection circuit, a method and a power supply system, which relate to the technical field of circuit protection and are used to solve the problem that some important communication equipment may be powered off due to excessive short-circuit current. The selective protection circuit includes: a current limiting module and a control module; wherein, the current limiting module includes a switch unit, and the switch unit includes a first terminal, a second terminal and a control terminal; the first terminal is connected to the positive pole of the bus voltage of the HVDC power supply, The second end is connected to the positive pole of the power supply of the pre-stabilization circuit in the load branch connected to the current limiting module; or, the first end is connected to the negative pole of the bus voltage of the HVDC power supply, and the second end is connected to the load branch connected to the current limiting module The negative pole of the power supply in the pre-stabilizing circuit is connected; the control terminal is connected to the control module; the control module is used to output a control signal to the control terminal when the value of the total current flowing through the switch unit is greater than or equal to the preset threshold value, so that The switching unit is switched off.
Description
technical field [0001] The invention relates to the technical field of circuit protection, in particular to a selective protection circuit, method and power supply system. Background technique [0002] In recent years, with the continuous increase in the power of communication equipment and the requirements for high efficiency and energy saving in the communication industry, data centers and communication equipment rooms have gradually adopted High Voltage Direct Current (HVDC) power supplies for power supply. Therefore, HVDC technology is widely used in communication The field is developing rapidly. [0003] However, with the increase of the power supply voltage of the data center and the communication equipment room, when the load branch connected through the power supply link is short-circuited, the short-circuit current in the load branch and the power supply link is also increasing, and the short-circuit current may be too large. It will cause some important communicat...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J9/00
CPCH02J9/00G05F3/205H01H73/18H01H83/10H02H3/07H02H7/267H02J9/005H02M1/088
Inventor 张振兴徐建生
Owner HUAWEI TECH CO LTD