BWDK dry-type transformer temperature controller

BWDK dry-type transformer temperature controller

The BWDK temperature controller model is a national standard dry-type transformer temperature controller model. Fujian Fuzhou Yinuo Technology provides the production, research and development, and sales of this type of temperature controller. The main models include

BWDK-Q201

BWDK-S201

BWDK-3200B

BWDK-3200C

BWDK-3200D

BWDK-3200E

BWD-3K130

BWD-3K130A

BWD-3K130B

BWD-3K130E

BWDK-3205

BWDK-3207

BWDK-3207A

BWDK-3208

BWDK-3208A

BWDK-3208B

BWDK-3208C

BWDK-3208D

BWDK-3208E

BWDK-3208F

BWDK-T3207

BWDK-T3207A

BWDK-T3208B

BWDK-T3208E

BWDK-T3208F

BWDK-W3205

BWDK-W3206

BWDK-W3207

BWDK-W3208

BWDK-S

BWDK-P

HY-BWD3K130B

HY-BWD3K130C

HY-BWD3K130D

HY-BWD3K130E

BWDK-2605

BWDK-2606

BWDK-2607

BWDK-2608B

BWDK-2608C

BWDK-2608D

BWDK-2608E

BWD-3K330B

BWD-3K330C

BWD-3K330D

BWD-3K320

BWDK-5800

Which company has good quality dry temperature controllers

The quality and quality of temperature controllers for dry-type transformers are closely related to the profitability of enterprises, and are closely related to the prosperity or survival of enterprises. In order to achieve high-quality development of enterprises, in addition to design, manufacturing, processing, marketing and other links, close attention should also be paid to the procurement of raw materials. The so-called "clever woman" is difficult to cook "inferior rice". Especially for manufacturing enterprises, including dry-type transformer manufacturers, the quality of raw materials is related to the key and main role of products (as well as controlling procurement costs, cost-effectiveness, strengthening management to improve the cost-effectiveness and market competitiveness of finished products). It is necessary to strengthen management, inspection, testing, and supervision of the procurement of dry-type transformer temperature controllers. Supervision of the temperature controller procurement process is the "first discipline" of enterprise product production, the first step to start well, and the first step to "start everything difficult".

Some dry-type transformer manufacturers do not attach enough importance to the product model inspection in the procurement process of dry-type transformer temperature controllers, or only focus on the inspection of samples provided by dry-type transformer temperature controllers suppliers, without paying enough attention to in-process and post inspection, or only focus on short-term inspection or post accident verification inspection, without paying enough attention to long-term inspection, or only inspect the surface or surface of raw materials, without paying enough attention to the irregular inspection, sampling, and patrol of the entire product. There may also be problems such as insufficient long-term sampling and patrol of inspectors.

The reasons, impacts, and hazards of quality internal control problems in the procurement process of dry temperature controllers, as well as the reasons for inadequate inspection and problems in the management of quality inspectors, quality engineers, and quality management personnel, as well as the reasons for the imperfect quality management system, discount on system implementation, and double or multiple standards for system implementation, include: the existence of management personnel being lazy, lazy, lax, and unwilling to offend others, as well as the unreasonable system, poor system execution and operability.

If the temperature controller of the dry-type transformer is unqualified, it will lead to the overall performance of the dry-type transformer being unqualified, its lifespan decreasing, stable operation not meeting the design requirements, inability to complete work tasks, and even safety accidents, resulting in difficulties in market sales and low market share for dry-type transformer temperature controller production enterprises, as well as affecting the normal operation of the manufacturer's production and life, affecting the final use effect or efficiency of the transformer manufacturer, and ultimately leading to the abandonment of this product in the market.

The hazards of poor quality inspection of temperature controllers for purchasing dry-type transformers include: dry-type transformer equipment generally has low quality. If the inspection of the temperature controller is not strict, it may also result in a shortage of quantity. The final result is that the quality of the produced temperature controllers is not high, the level of temperature controllers cannot be improved, the price of temperature controllers is high, the competitiveness of temperature controllers is poor, which affects the reputation of the enterprise and has a negative impact on the brand of temperature controllers for dry-type transformers. If the problem is not significant, it will at least affect the enterprise's profits. If the problem is significant, it will ultimately affect the survival and development ability of the enterprise.

Temperature standard for dry-type power transformers

It's 2019 now, and dry-type transformers usually have two levels. One is F level (with a permissible temperature of 155 ℃ and a permissible temperature rise of 100K), and the other is H level (with a permissible temperature of 180 ℃ and a permissible temperature rise of 125K). The temperature controller measures the average temperature transmitted by the coil of a dry-type transformer, and does not detect the highest temperature of the dry-type transformer coil. The same applies to temperature rise. So according to the regulations of Fujian Yingnuo Technology's dry transformer temperature controller, the allowable temperature and temperature rise of the coil's dry transformer during operation should be 10 ℃ lower than the allowable temperature and temperature rise of the material. Therefore, only when the temperature and temperature rise of the coil during operation do not exceed the allowable value, can the safe and stable operation of the dry-type transformer be guaranteed.

A dry-type transformer with H-class insulation has a permissible temperature of 170 ℃ and a temperature rise of 115K for its coils during operation.

Temperature controller settings for dry-type transformers

4.1 "Black Box" Function

This function can be used to view the historical highest temperature and the temperature values of each phase before the last power outage of the temperature controller.

4.2 Fan timing excitation value setting function

4.3 Parameter setting function

The meaning of the parameter prompt is as follows:

1. Except for the start and stop of the cooling fan and the machine room fan, all other target values have a default deviation of 0.4 ℃.

2. The parameters shown above are all reference values, and the specific set values are subject to factory settings.

3. The commonly used three temperature controllers only have C1, C2, C3, and C4 parameter settings.

Type G products include C5, C6, and C7 parameter settings, while Type I products include C8 parameter settings.

4.4 Zero adjustment function

When the temperature controller measures and displays the temperature of each phase of the transformer, if there is a significant deviation between the measured temperature of each phase and the actual temperature value, it can enter the zero adjustment function to correct the measured values of each phase. (Compensation range: -19.9 ℃ to+19.9 ℃)

4.5 Simulation testing function

It is possible to simulate temperature changes through digital settings and detect the output status and corresponding contacts of the temperature controller.

To avoid accidental tripping of transformers, the software does not support the function of simulating over temperature tripping! (The trip light will light up)

4.6 Universal terminal setting function

The universal terminal 1 (- dn -) of the IB-S series corresponds to terminals 10 and 11.

The universal terminal 1 (- dn -) of the IB-Q201/IB-M201 series corresponds to terminals 11 and 12; Universal terminal 2 (- d2-) corresponds to terminals 15 and 16.

3. Universal terminal 1 (- dn -) of the IB-L201 series corresponds to terminals 19 and 20, and universal terminal 2 (- d2-) corresponds to terminals 15 and 16; If there is a current phase loss protection function, there is only one universal terminal 1 (- dn -) corresponding to terminals 19 and 20. At this time, terminals 15 and 16 serve as output contacts for current phase loss protection.

4.7 Communication parameter settings

4.7.1 Serial communication with PC can be achieved by modifying communication address, checksum, and baud rate parameters.

4.7.2 The temperature controller (box) has RS485 serial communication function, and the provided RS485/RS232 converter does not require external power supply.

Schematic diagram of RS485/RS232 converter and communication connection:

Schematic diagram of 9-pin communication connection for converter

4.7.3 Data Format

Start bit data length check bit stop bit

1 bit, 8 bits, 0 or 1 bit (adjustable), 1 bit

4.7.4 Communication protocol content (message format)

1. Command transmission from upper computer

Address 1-250

Function Code # # (see "Function Code Description" for details)

Starting address with 8 high bits 00

Starting Address Low 8 Bits # # (see "Starting Address Description" for details)

Data volume word count high 8 bits 00

Data volume word count low 8 bits##

CRC16 checksum low 8 bits

CRC16 checksum high 8 bits

Function code description:

When the function code is 03, the lower computer returns the temperature values of each phase of the temperature controller. As the temperature controller usually has 1-4 temperature measurement channels, the "number of data words" of the upper computer is between 0001 and 0004; When the function code is 04, the lower computer returns the relay output status of the temperature controller. At this time, the "number of data words" of the upper computer is 0001, and the starting address of the upper computer is 0000.

Starting address description:

Starting Address Description Register Definition

0000A phase temperature data high 8 bits A phase temperature data 40001

A-phase temperature data low 8 bits

0002B phase temperature data high 8 bits B phase temperature data 40002

B-phase temperature data low 8 bits

0004C phase temperature data high 8 bits C phase temperature data 40003

C-phase temperature data low 8 bits

0006D channel temperature data high 8 bits D channel temperature data 40004

D-channel temperature data low 8 bits

Note: If the temperature controller measures three paths, the starting address 0006 is the reserved address.

2. Lower computer returns data

1) Lower computer returns temperature data

Address 1-250

Function code 03

Data Byte Count Data Word Count * 2

The actual temperature of each phase in the top 8 digits of phase A temperature data=temperature data of each phase/10

A-phase temperature data low 8 bits

D-channel temperature data high 8 bits

D-channel temperature data low 8 bits

CRC16 checksum low 8 bits

CRC16 checksum high 8 bits

When the upper computer sends function code 03, if the values of the temperature data sent back by the temperature controller for the high and low 8 bits are shown in the table below, it indicates that the temperature controller is working in a faulty state and the temperature value should not be calculated. The working state of the temperature controller should be determined according to the table below; If the temperature data is not shown in the table below, it indicates that the temperature controller is working normally and the temperature value can be calculated based on the temperature data's high and low 8 bits.

Temperature data high 8 bits Temperature data low 8 bits Temperature controller status description

0x700x00- OP - Open circuit

0x600x00 exceeds the upper limit

0x800x00 exceeds the lower limit

0x500x00- Er - Fault

2) The lower computer returns the output status of the temperature control relay

Address 1-250

Function code 04

Byte count of data quantity 02

Status data high 8 bits 00

Low 8 bits of status data # # (see "Definition of Low 8 bits of status data" for details)

CRC16 checksum low 8 bits

CRC16 checksum high 8 bits

Definition of low 8 bits of status data

① When the temperature controller measures three circuits:

bit7bit6 bit5 bit4bit3bit2bit1bit0

Among them: bit3 represents the fault alarm output bit, bit2 represents the over temperature alarm output bit

Bit1 represents over temperature trip output bit 0 represents fan control output bit

② When the temperature controller measures four channels:

Among them: bit4 represents the fault alarm output bit, bit3 represents the iron core overtemperature alarm output bit

Bit2 represents the over temperature alarm output bit, and bit1 represents the over temperature trip output bit

Bit0 represents the fan control output bit

Status of each output bit: 0- represents that the output contact is open 1- represents that the output contact is closed

4.7.5 Communication examples

Assumption: When the communication address of the temperature control (measuring three channels) is 1; The temperature of phase A is in an open circuit state (- OP -), and the temperature of phase B is 30.0 ℃,

The C-phase temperature is 100.0 ℃; Fault alarm output, fan control output.

1. Computer download command (reading temperature values of each phase)

01h03h00h00h00h03h05h0CBh

2. Temperature control feedback data (temperature values of each phase)

01h03h06h70h00h01h2Ch03hE8hEAhCEh

3. Computer transmission command (reading relay output status)

01h04h00h00h00h01h31h0CAh

4. Temperature control feedback data (relay output status)

01h04h02h00h09h79h36h

1. Current output function

5.1 Functional characteristics

In the current output function, the current output is linearly related to the temperature value. The 4-20mA current signal corresponds to a temperature of 0-200 ℃. The current output can be directly connected to the remote A/D card to form a distributed monitoring system. (DCS system)

Inside the temperature controller, A+, B+, C+, and D+are connected, known as common anodes, and typically provide analog current output for 3-phase winding temperature.

5.2 Technical parameters for current output (load resistance: R ≤ 500 Ω; output accuracy: ± 1%)

The relationship between temperature and current is as follows:

I=(16T/200)+4

Where T is the temperature value of a certain phase winding (℃); I is the current value corresponding to the phase temperature (mA)

If the user's collection system requires receiving analog voltage signals, a high-precision resistor of 250 Ω can be directly connected to the existing current output terminal to obtain a voltage signal of 1-5V.

How to write the model of the temperature controller for dry-type transformers

Selection instructions for the temperature controller model of BWDK-Q201 dry-type transformer

Model Function

BWDK-Q201D three-phase circuit display/maximum value display; Fan automatic/manual start stop; Over temperature alarm; Overtemperature trip; Fault alarm; Black box function; Fan timing excitation function; Simulation testing function; Digital compensation function; Cabinet door opening alarm function.

BWDK-Q201E has the same D-type function, adding 4-20mA analog current output.

BWDK-Q201F

Same as D-type function, adding RS485/232 serial communication function.

BWDK-Q201G has the same D-type function, adding a temperature measurement and control system for the computer room environment.

BWDK-Q201I

Same as D-type function, adding a transformer core temperature measurement and alarm.

BWDK-Q201C has the same D-type function and adds a thermistor PTC150 or PTC130 for interlocking control.

remarks:

1. For example: BWDK-Q201F, BWDK represents the national standard model of the temperature controller, Q represents the embedded iron shell temperature controller, and F is the code for communication function;

2. E, F, G, I, and C are all function codes, which can be combined. The following examples are provided to illustrate:

Temperature controller model: BWDK-Q201FG, indicating that it is an embedded iron shell temperature controller. Its functions include: conventional function, communication function (F), and an additional room environment temperature measurement and control function (G).

If there are already two functions, E and F, and then adding G and I functions can only choose one as the added function, and there are at most three simultaneous function codes. For example, the models are BWDK-Q201EFG and BWDK-Q201EFI.

3. If there are other special technical or functional requirements, such as Ethernet communication, Profibus communication, multi-channel temperature measurement, fiber optic temperature measurement, and expanding contact capacity, you can contact us.

Fujian Fuzhou Yingnuo Electronic Technology Co., Ltd. has a complete range of brands and models of temperature controllers for dry-type transformers. The wiring diagram and manual of the temperature controller are simple, and the manufacturer sells them directly at a reasonable price. Welcome to inquire!

Instruction manual for intelligent temperature controller of dry-type transformer

IB-L201 series terminal definition:

1. The dashed box represents the user's wiring section.

2. Terminals 1 and 2 are externally connected to an AC220V working power supply. (Terminal 1 is connected to the neutral wire)

3. Terminals 3, 4, and 5, 6 are respectively externally connected to two sets of single-phase fans. (Active)

4. Terminals 9 and 10 are normally open output contacts for over temperature trip signals. (Passive)

5. Terminals 13 and 14 are normally open output contacts for over temperature alarm signals. (Passive)

6. Terminals 17 and 18 are normally open output contacts for temperature control box fault alarm signals. (Passive)

Terminals 19, 20, and 15, 16 are two sets of universal normally open output contacts. (Passive)

8. Terminals 21 and 22 are externally connected to the transformer cabinet door limit normally open contacts. (Internal active)

9. IB-L201G series, terminals 7 and 8 are normally open output contacts for the computer room cooling fan. (Passive)

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