CN216411538U

CN216411538U - Carrier interface load ripple test circuit for concentrator

Info

Publication number: CN216411538U
Application number: CN202122736449.2U
Authority: CN
Inventors: 朱华健; 万久森
Original assignee: Hangzhou Deming Electronic Co ltd
Current assignee: Hangzhou Deming Electronic Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-04-29
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses a carrier interface load ripple test circuit for a concentrator, which belongs to the technical field of power supply test systems and comprises a pin header, switching ports K1 and K2, switches S1 and K3, capacitors C1 and C2, and resistors R1, R2 and R3.

Description

Carrier interface load ripple test circuit for concentrator

Technical Field

The utility model relates to the technical field of power supply test systems, in particular to a carrier interface load ripple test circuit for a concentrator.

Background

The national grid I-type concentrator is connected to a three-phase alternating current power supply and is used for measuring the electric energy of a power grid. The concentrator not only serves as a metering device, but also needs to upload electric energy data metered by a down-connection three-phase meter or a single-phase meter to the concentrator through a carrier module for storing the data and sending the data to a main station through a GPRS module. The current common test method is to directly clamp the oscilloscope probe to the position to be tested and read ripple data through the oscilloscope, but the interference in the environment is often directly coupled to the probe, so that the tested ripple has larger interference and larger deviation, and the test method can generate large interference on the discrete frequency noise test result.

SUMMERY OF THE UTILITY MODEL

In view of the deficiencies of the prior art, the present invention provides a carrier interface load ripple test circuit for a concentrator, which solves the problems mentioned in the background art.

In order to achieve the purpose, the utility model is realized by the following technical scheme: a carrier interface load ripple test circuit for a concentrator comprises pins, adapter ports K1 and K2, switches S1 and K3, capacitors C1 and C2, resistors R1, R2 and R3, wherein a first channel and a second channel are arranged on the switch S1; the row pins are 2 × 13 double rows of pins, and 1/2 pins of the row pins are connected with a voltage V2; 11/12 pin is connected with 12V voltage and connected to the input end of the adapter K1; the output end of the K1 is connected with the first channel of the switch S1; the series resistors R1 and R2 at the loaded end of the first channel are grounded after being connected in series, and the unloaded end of the first channel is connected in an idle mode; the 18 pins of the pin header are connected with 3.3V voltage and are simultaneously connected to the input end of the adapter K2; the output end of the K2 is connected with the second channel of the switch S1, the loaded end of the second channel is connected with the resistor R3 in series and then is grounded, and the no-load end is connected in an idle mode; the pin 20 of the pin header is connected with a short-circuit point of a switch K3, and the other end of the K3 is grounded; 9/10/25/26 pins of the pin header are grounded; one end of the capacitor C1 is connected with the input end of the K1, and the other end is grounded; one end of the capacitor C2 is connected with the input end of the K2, and the other end is grounded.

Preferably, the adapter K1 is provided with a metal housing, which is grounded.

Preferably, the adapter K2 is provided with a metal housing, which is grounded.

Preferably, the adapter ports K1 and K2 are used for fixing with a probe of an oscilloscope.

Preferably, the resistors R1, R2 and R3 all have power of 10W.

The utility model provides a carrier interface load ripple test circuit for a concentrator, which has the following beneficial effects: place the frock on the carrier interface of concentrator, can directly fix oscilloscope probe through the switching mouth, can switch over load access and disconnection through the switch, thereby test concentrator carrier interface's ripple, it is simpler and accurate than current test mode, simultaneously can direct test interface on-load ability and short-circuit protection function, electric capacity plays the effect of filtering, the interference coupling of environment is avoided to the probe, avoid producing the interference to discrete frequency noise test simultaneously, whole device simple structure, it is convenient to connect, and is with low costs.

Drawings

FIG. 1 is a circuit diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

As shown in fig. 1, the present invention provides a technical solution: a carrier interface load ripple test circuit for a concentrator comprises pins, adapter ports K1 and K2, switches S1 and K3, capacitors C1 and C2, resistors R1, R2 and R3, wherein a first channel and a second channel are arranged on the switch S1; the row pins are 2 × 13 double rows of pins, and 1/2 pins of the row pins are connected with a voltage V2; 11/12 pin is connected with 12V voltage and connected to the input end of the adapter K1; the output end of the K1 is connected with the first channel of the switch S1; the series resistors R1 and R2 at the loaded end of the first channel are grounded after being connected in series, and the unloaded end of the first channel is connected in an idle mode; the 18 pins of the pin header are connected with 3.3V voltage and are simultaneously connected to the input end of the adapter K2; the output end of the K2 is connected with the second channel of the switch S1, the loaded end of the second channel is connected with the resistor R3 in series and then is grounded, and the no-load end is connected in an idle mode; the pin 20 of the pin header is connected with a short-circuit point of a switch K3, and the other end of the K3 is grounded; 9/10/25/26 pins of the pin header are grounded; one end of the capacitor C1 is connected with the input end of the K1, and the other end is grounded; one end of the capacitor C2 is connected with the input end of the K2, and the other end is grounded; the adapter K1 is provided with a metal shell, and the metal shell is grounded; the adapter K2 is provided with a metal shell, and the metal shell is grounded; the adapter ports K1 and K2 are used for being fixed with a probe of an oscilloscope; the power of the resistors R1, R2 and R3 is 10W.

When the device is used, the tool is placed on the carrier interface of the concentrator, the oscilloscope probe can be directly fixed through the switching port, and the switch can switch the load to be switched on and off, so that the carrier interface ripple data of the concentrator can be quickly and accurately tested, the product inspection efficiency and accuracy are improved, the capacitor has the filtering effect, the interference coupling of the environment to the probe and the interference resistance to the discrete frequency noise test are avoided, and the whole device is simple in structure, convenient to connect and low in cost.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A carrier interface load ripple test circuit for a concentrator comprises pins, transfer ports K1 and K2, switches S1 and K3, capacitors C1 and C2, and resistors R1, R2 and R3, and is characterized in that: the switch S1 is provided with a first channel and a second channel; the pin headers are 2 × 13 double rows of pins, and 1 pin and 2 pins of the pin headers are connected with a voltage V2; the 11 pin is connected with 12V voltage, and the 12 pin is connected with 12V voltage and is simultaneously connected to the input end of the adapter K1; the output end of the K1 is connected with the first channel of the switch S1; the loaded end of the first channel is connected with resistors R1 and R2 in series and then is grounded, and the unloaded end is connected in an idle mode; the 18 pins of the pin header are connected with 3.3V voltage and are simultaneously connected to the input end of the adapter K2; the output end of the K2 is connected with the second channel of the switch S1, the loaded end of the second channel is connected with the resistor R3 in series and then is grounded, and the no-load end is connected in an idle mode; the pin 20 of the pin header is connected with one end of a switch K3, and the other end of the switch K3 is grounded; pins 9, 10, 25 and 26 of the pin header are grounded; one end of the capacitor C1 is connected with the input end of the K1, and the other end is grounded; one end of the capacitor C2 is connected with the input end of the K2, and the other end is grounded.

2. A carrier interface load ripple test circuit for a concentrator, according to claim 1, wherein: the adapter K1 is provided with a metal shell which is grounded.

3. A carrier interface load ripple test circuit for a concentrator, according to claim 1, wherein: the adapter K2 is provided with a metal shell which is grounded.

4. A carrier interface load ripple test circuit for a concentrator, according to claim 1, wherein: the adapter ports K1 and K2 are used for being fixed with a probe of an oscilloscope.

5. A carrier interface load ripple test circuit for a concentrator, according to claim 1, wherein: the power of the resistors R1, R2 and R3 is 10W.