CN208971127U - A kind of distribution transformer multi-function protector - Google Patents

Abstract

A kind of distribution transformer multi-function protector; including detecting element, tranformer protection and executing agency; detecting element is connect with Protector for transformer; Protector for transformer is connect with executing agency; the Protector for transformer includes shell, input module, A/D module, Keysheet module, display module, power module, time delay module and output module; input module is connect with A/D module; A/D module, Keysheet module, display module, power module and time delay module are connect with CPU, and output module is connect with time delay module.The protector can acquire the various parameters of distribution transformer and carry out definite value comparison, be delayed, and when condition reaches the limiting value set, protector starting output, tripping distribution transformer low-pressure side is spaced apart, and cuts off fault current, achieve the purpose that protect transformer.

Description

A kind of distribution transformer multi-function protector

Technical field

It transmits electricity the utility model relates to transformer and controls apparatus field, and in particular to a kind of distribution transformer multifunction protection Device.

Background technique

10kV distribution transformer is during day-to-day operation, often since overload, short circuit, lightning stroke etc. damage, but it is most of It is all due to being struck by lightning and overloading damage, wherein 90% or more overload belongs to one-phase overload caused by threephase load imbalance Fever, leads to oil spout and insulation damages, but due in the design of current standard 10kV distribution transformer high-pressure side be all molten with falling Disconnected device protection, can not preferably protect one-phase overload, and distribution transformer low-pressure side is spaced apart for two-way, can only be to its outlet Branch is protected, and when the same phase load of two-way outlet is higher, frequently can lead to branch line and be spaced apart do not trip, but transformer is Situations such as through one-phase overload, all protections are all failed at this time, be will lead to transformer and are seriously overheated until oil spout is burnt.

Utility model content

The utility model to solve the above-mentioned problems, devises a kind of distribution transformer multi-function protector, the protector The various parameters of distribution transformer can be acquired and carry out definite value comparison, be delayed, when condition reaches the limiting value set, Protector starting output, tripping distribution transformer low-pressure side are spaced apart, and cut off fault current, to reach the mesh of protection transformer 's.

In order to achieve the above technical purposes, reach above-mentioned technical effect, the utility model is real by the following technical programs Existing:

A kind of distribution transformer multi-function protector, including detecting element, Protector for transformer and executing agency, detection member Part is connect with Protector for transformer, and Protector for transformer is connect with executing agency, which is characterized in that the detecting element includes Zero sequence current mutual inductor and temperature sensor, the Protector for transformer include shell, input module, A/D module, keyboard mould Block, display module, power module, time delay module and output module, input module are connect with A/D module, A/D module, keyboard mould Block, display module, power module and time delay module are connect with CPU, and output module is connect with time delay module, described CPU, A/D Module and time delay module are fixed in shell, and the input module includes that the temperature detection input being set on the left of shell is inserted What is be arranged on the right side of mouth, current detecting input socket and shell is spaced apart line detection input socket, and zero sequence current mutual inductor passes through conducting wire It is connect with current detecting input interface, temperature sensor is fixed on transformer and is connected by conducting wire and temperature detection input socket It connects, Keysheet module includes being set to the positive temperature setting button of shell and electric current setting button, and display module includes that temperature is aobvious Display screen and electric current display screen, power module include the DC-DC power source socket being set on the left of shell, and output module includes being set to Three-phase tripping output interface on the right side of shell, detecting element are connect with current detecting input socket, and executing agency and three-phase trip Output interface connection.

Preferably, the executing agency selects electronic trip unit.

Preferably, the temperature display and electric current display screen select light emitting diode (LED) display screen.

Preferably, the CPU selects the TMS320F28335 type microprocessor chip of Texas Instrument's production, A/D module Select ADC7606 type AD sampling A/D chip.

The beneficial effects of the utility model are: the protector can acquire the various parameters of distribution transformer and carry out definite value ratio It is right, it is delayed, when condition reaches the limiting value set, protector starting output, tripping distribution transformer low-pressure side sky It opens, cuts off fault current, achieve the purpose that protect transformer.

Detailed description of the invention

In order to illustrate more clearly of the technical solution of the utility model embodiment, make required for being described below to embodiment Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention, For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings Other attached drawings.

Fig. 1 is a kind of wiring construction schematic diagram of distribution transformer multi-function protector；

Fig. 2 is the structural block diagram of the transformer protection device；

Fig. 3 is the main view of the transformer protection device；

Fig. 4 is the left view of the transformer protection device；

Fig. 5 is the right view of the transformer protection device；

Fig. 6 is the top view of the transformer protection device.

In attached drawing, parts list represented by the reference numerals are as follows:

1- Protector for transformer, 2- zero sequence current mutual inductor, 3- executing agency, 4- transformer, 5- temperature sensor, 11- CPU, 12- input module, 13-A/D module, 14- Keysheet module, 15- display module, 16- power module, 17- time delay module, 18- output module, 121- temperature detection input socket, 122- current detecting input socket, 123- are spaced apart line detection input socket, 141- temperature setting button, 142- electric current set button, 143- protection act indicator light, 151- temperature display, 152- electric current Display screen, 161-DC-DC outlet, 181- three-phase tripping output interface.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts All other embodiment obtained, fall within the protection scope of the utility model.

Refering to fig. 1 shown in -6, a kind of distribution transformer multi-function protector, including detecting element 2, Protector for transformer 1 With executing agency 3, detecting element 2 is connect with Protector for transformer 1, and Protector for transformer 1 is connect with executing agency 3, described Detecting element includes zero sequence current mutual inductor 2 and temperature sensor 5, and the Protector for transformer 1 includes shell, input module 12, A/D module 13, Keysheet module 14, display module 15, power module 16, time delay module 17 and output module 18, input module 12 connect with A/D module 13, A/D module 13, Keysheet module 14, display module 15, power module 16 and time delay module 17 with CPU11 connection, output module 18 are connect with time delay module 17, and CPU11, A/D module 13 and time delay module 17 are fixed on In shell, the input module 12 include be set to temperature detection input socket 121 on the left of shell, current detecting input is inserted What is be arranged on the right side of mouth 122 and shell is spaced apart line detection input socket 123, and temperature sensor 5 is fixed on transformer 4 and by leading Line is connect with temperature detection input socket 5, and Keysheet module 14 includes being set to the positive temperature setting button 141 of shell and electric current Button 142 is set, display module 15 includes temperature display 151 and electric current display screen 152, and power module 16 includes being set to shell DC-DC power source socket 161 on the left of body, output module 18 include the three-phase tripping output interface 181 being set on the right side of shell, inspection It surveys element 2 to connect with current detecting input socket 122, executing agency 3 connect with three-phase tripping output interface 181.

In the present embodiment, executing agency 3 selects electronic trip unit, and temperature display 151 and electric current display screen 152 select hair Optical diode display screen, CPU11 select the TMS320F28335 type microprocessor chip of Texas Instrument's production, and A/D module 13 is selected With ADC7606 type AD sampling A/D chip.

The specific application of one of the present apparatus are as follows: detecting element 2 is that the zero sequence current mutual inductor in the present embodiment is single turn Straight-through current transformer, installation is simple and can be installed additional on the basis of not changing existing equipment；When three-phase circuit occurs When electric leakage or overload, there is leakage current to flow through in circuit, at this moment across the three-phase current phasor of zero sequence current mutual inductor 2 and not Deng zero, just there is an induced voltage in the secondary coil of zero sequence current mutual inductor 2, zero sequence current mutual inductor 2 is by the induction of generation Voltage and current information analog signal is sent to A/D module 13, is also secured to temperature sensor 5 on transformer 4 for transformation The temperature value of device is converted to analog signal and is sent in A/D module 13, and A/D module 13 is by current analog signal and temperature simulation Signal is converted to digital signal and is sent in CPU11, and CPU11 is by the actual value of the electric current of input and temperature and passes through keyboard mould The electric current and desired temperature that block 14 inputs compare, when temperature value is greater than respective setting value to actual current value, The executing agency 3 namely electronic trip unit that CPU11 driving is connect with its three-phase tripping output interface 181 disconnect step down side Switch, cut off fault current to protect the purpose of transformer 4；CPU11, which exports current value and temperature value to temperature, simultaneously shows It is shown on display screen 151 and electric current display screen 152.

In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one of the utility model In embodiment or example.In the present specification, schematic expression of the above terms be not necessarily referring to identical embodiment or Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more embodiment or examples In can be combined in any suitable manner.

The preferred embodiment in the utility model disclosed above is only intended to help to illustrate the utility model.Preferred embodiment is simultaneously There is no the details that detailed descriptionthe is all, also not limiting the utility model is only the specific embodiment.Obviously, according to this theory The content of bright book can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably The principles of the present invention and practical application are explained, so that skilled artisan be enable to better understand and utilize this Utility model.The utility model is limited only by the claims and their full scope and equivalents.

Claims (4)

1. a kind of distribution transformer multi-function protector, including detecting element, Protector for transformer and executing agency, detecting element It is connect with Protector for transformer, Protector for transformer is connect with executing agency, which is characterized in that the detecting element includes zero Sequence current transformer and temperature sensor, the Protector for transformer include shell, input module, A/D module, keyboard mould Block, display module, power module, time delay module and output module, input module are connect with A/D module, A/D module, keyboard mould Block, display module, power module and time delay module are connect with CPU, and output module is connect with time delay module, described CPU, A/D Module and time delay module are fixed in shell, and the input module includes that the temperature detection input being set on the left of shell is inserted What is be arranged on the right side of mouth, current detecting input socket and shell is spaced apart line detection input socket, and zero sequence current mutual inductor passes through conducting wire It is connect with current detecting input interface, temperature sensor is fixed on transformer and is connected by conducting wire and temperature detection input socket It connects, Keysheet module includes being set to the positive temperature setting button of shell and electric current setting button, and display module includes that temperature is aobvious Display screen and electric current display screen, power module include the DC-DC power source socket being set on the left of shell, and output module includes being set to Three-phase tripping output interface on the right side of shell, detecting element are connect with current detecting input socket, and executing agency and three-phase trip Output interface connection.

2. a kind of distribution transformer multi-function protector according to claim 1, which is characterized in that the executing agency Select electronic trip unit.

3. a kind of distribution transformer multi-function protector according to claim 1, which is characterized in that the temperature display Screen and electric current display screen select light emitting diode (LED) display screen.

4. a kind of distribution transformer multi-function protector according to claim 1, which is characterized in that the CPU is selected The TMS320F28335 type microprocessor chip of Texas Instrument's production, A/D module select ADC7606 type AD sampling A/D chip.