hz-108kva/108kv seriesresonance withstandtestset · 2017-10-30 ·...

Huazheng Electric Manufacturing Co.,Ltd

HZ-108kVA/108kV Series ResonanceWithstand Test Set

USER MANUAL

aHuazheng Electric Manufacturing(Baoding) Co., Ltd


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Chapter 1 Product Overview

The device is designed and manufactured mainly for AC voltage withstand test of

main electrical equipment, such as 10kV and 35kV cable, electric generator and main

transformer of 220kV and below. Electric reactor is designed separately with multiple

sections, and the various combinations of series/parallel connections could increase

or decrease voltage, electric current, frequency, power, and so on. For example, series

connection could boost voltage and frequency, and parallel connection could increase

electric current and reduce frequency. The device is applied widely to high-voltage

testing departments of city and county, and is the ideal withstand voltage equipment

for companies engaged in power installation and maintenance.

The device is mainly consisted of variable-frequency power source, Excitation

transformer, electric reactor, capacitive voltage divider, and so on.

Advantages of series resonance applied to electric system

1.Greatly reduce the power capacity needed. Series resonance power makes use

of the high voltage and strong current generated by the resonance between resonance

reactor and capacitance of the object. In the entire system, power only supplies the


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parts of power consumption. Therefore, the power needed in test is only 1/Q of the

capacity of test.

2.Greatly reduce the weight and volume of equipment. With series resonance

power, the heavy high-power voltage-regulating unit and high-power

working-frequency testing transformer will be no longer used. Furthermore,

resonance excitation power is only 1/Q of test capacity, so the weight and volume of

system could be reduced greatly, generally 1/10-1/30 of common testing equipment.

3.Improve waveform of output voltage. Resonance power is of resonant filter

circuit, which could improve wave distortion of output voltage and produce better

sine wave, thus effectively preventing accidental breakdown to the object tested

caused by peak of harmonic wave.

4.Prevent heavy short-circuit current from burning fault point. In the state of

series resonance, if insulation imperfection of the object to be tested is broken down,

the circuit will lose resonance immediately and the loop current will drop rapidly to

1/Q of normal test current. Compared to withstand voltage test adopting parallel

resonance or testing transformer, in which breakdown current will rise several tens of

times immediately in the abovementioned case, short-circuit current is different with

breakdown current hundreds of times. Therefore, with series resonance, insulation

imperfection could be found out easily, and at the same time, you’ll not worry about

short-circuit current burning the fault point.

5.No appearance of any restoring overvoltage. In case of breakdown of test

object, due to lose of resonance conditions, high voltage will disappear immediately,

electric arc will also extinguish at once, and it will take very long time to restore

voltage, so it’s easy to cut off power before up to flashover voltage next time. The


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process of voltage restoration is an interrupted oscillation process of energy

accumulation, which will take very long time, and there’ll be no case of restoring

overvoltage.

Main functions and technical features of frequency modulation resonance

device of our company:

1.The device have the protection functions such as overvoltage, overcurrent,

zero position starts up, system detuning (flashover), and so on. The value of

overvoltage and overcurrent protection could be set according to user’s demands,

when the test object occurs flashover, the flashover protection will act and also the

value of voltage, current, etc. will be recorded at the time of flashover, which

provides convenience for test analysis.

2.The single piece of entire device is of light weight, not more than 40kg (except

large capacity equipment), which provides convenience for field use.

3.The device has three operating modes and users could choose one according to

the site conditions, thus improving the time consumption of test.

Operating modes: full-automatic, manual, automatic tuning and manual

boosting

4.Memory function, with which the data is stored in figures, is convenient for

users to identify and lookup.

5.When the device conducts frequency sweeping automatically, the starting

point could be set at random within the specified range; the direction of sweeping

could be upward or downward, and it is convenient for user to know if resonance

point is found or not.

6.Sweep frequency at high speed; automatically identify exciting transformers of


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each manufacturer.

7.Adopt DSP platform technology, it is convenient for user to add or reduce

functions and upgrading according to the demands; also make the human-machine

exchange interface more humanized.

Chapter 2 Technical Parameters of HZ-108KV/108KVA Variable Frequency

Series Resonance Withstand Voltage Test Device

HZ – manufacturer code

108KVA – the maximum rated capacity output by the device, unit: kVA

108KV – voltage classes output by the device, unit: kV;

(II) Technical indicators of HZ-108KV/108KVA variable frequency series

resonance withstand voltage test device

1.Rated voltage:

108kV – for AC voltage withstand test of 10KV and 35KV system

2.Waveform deviation factor of output voltage: <1.0％

3.Allowable continuous working time: Continuous work for 60 minutes under

rated conditions;

4.Quality factor of the device: Q>50

5.Quality factor in fire power generator test with full load: Q>10 (relevant to the

load)

6.Quality factor in cable test with full load: Q>30 (relevant to the load)

7.Quality factor in main transformer test with full load: Q>30 (relevant to the

load)

8.Quality factor in GIS and switch test with full load: Q>50 (relevant to the

load)

9.Input power: Single phase 220, 380, 3*380V


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10.Range of frequency adjustment: 30Hz～300Hz

11.System measurement accuracy: 1.5％

12.Protective functions of overload, overcurrent, flashover, and zero position

startup of the device

(III) Relevant standards

Erection Works of Electrical Installations Standard for Hand-over Test of electric

equipment GB50150-2006

High-voltage Resonance Testing Apparatus DL/T 849.6—2004

Electric Reactor GB10229.88

Preventive Test Regulations for Electric Power Equipment DL/T596-1996

Coupling Capacitors and Capacitor Dividers IEC358 (1990)

(IV) Key properties of the device

1.Strong resistance to interference

2.Find frequency faster

3.Operation prompts on each interface/multi-interface test result

4.Automatically track and maintain stable test voltage

5.Manual/automatic test function (pause/quit at will)

6.Coarse/fine adjustment of frequency/voltage

7.Large capacity for the control part of variable frequency power; strong

protective function; better output waveform/good stability; universal use for single

phase/three phase input power which provides convenience for field test;

8.Flexible mating: Different types of exciting transformer, electric reactor,

capacitive voltage divider, etc. could be used to satisfy the demands of different test

objects. One device serves several purposes, thus boasting high performance cost

ratio.


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(V) Device configuration and technical parameters:

1. Variable frequency power source, 1 set: (customized according to user’s

demands)

Rated power: 6kVA;

Input voltage: single phase 220V or 380V±10% 45～65Hz

Output voltage: 0～200V adjustable (effective value)

Output voltage frequency: 30～300Hz

Regulation precision: coarse 2Hz stepping fine 0.1Hz stepping degree of

instability 0.01%

Output current: 0～18A (maximum current varies along with different powers)

1.High-voltage electric reactor (4 sets in total): 27kV/1A (The following

data change according to different powers)

Rated operational voltage: 27kV

Rated operational current: 1A

Rated inductance value: 100H

Continuous working time: 60min

Temperature rise: less than 60°

Operating frequency: 30～300Hz

2.Exciting transformer, 1 set (The following data change according to

different powers)

Rated capacity: 6kVA

Input voltage: 200V/400V

Output voltage: 1.25/2.5/5kV, 1.25kV for 10kVtransformer substation system

withstand voltage test; 2.5kV for 35kVtransformer substation system


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withstand voltage test.

3.Capacitive voltage divider, 1 set: 150KVcapacitive (The following data

change according to different voltages)

Capacitance of the device: 1000pF

Operating frequency: 30～300Hz

Degree of uncertainty: 1.5%

Rated voltage: 150kV/1000pF

Chapter IV Detailed Introduction to Use of Variable-frequency Power

4.1. General information

4.1.1. Power

Directly connect single phase 220V or three phase 380V with“Input” of

variable-frequency power source; connect with red A and yellow C when the

power is 220V and connect with red A, green B and yellow C when the power

is 380V.

4.1.2. Operation panel and function description


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分压采样 Voltage divider sampling

确定 Ok

菜单 Menu

打印 Print

退出 Exit


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Po

we

r

sw

itch: For power supply or disconnection of the entire device.

Emergency stop: Button of interrupting in case of emergency; please do not

use this button if there’s no emergency!!!

Voltage divider signal: For joining up low voltage side of voltage divider,

maximum voltage of 100V, input resistance >=2M.

Earthling: For safety ground of system.

LCD: For displaying system parameters and menu.

RS232: For system upgrading and historical data output to PC.

Input: Connect with Input A and C when power is 220V and with Input A, B

and C when power is 380V.

Output: Output of variable-frequency power source to input of excitation

transformer.

电源开关 Power switch

输入 Input

输出 Output


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Printer: Print test/historical data report.

Keyboard: Test parameters input and process operation.

4.1.3. Power-on

When operation box is power on, switch on“Power Switch”; the LCD screen

displays.

4.2.1After starting up, the LCD interface will display as shown below:

欢迎使用变频谐振试验装置 Welcome to use Variable-frequency

Resonance Test Device

按菜单工作 Press “Menu” for operation

按打印校时 Press “Print” for time setting

Press“Menu” to enter the operation system, and press“Print” to enter system

time setting.

4.2.2．Enter into operative mode of system


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功能选择 Function selection

选择 Select

参数配置 Parameter configuration

自动测试 Automatic testing

手动测试 Manual testing

数据查询 Data query

确认运行 Confirm Run

Parameter setting: Setting of various test parameters;

Manual test: Full-manual test mode and semi-automatic test mode;

Automatic test: Automatic test mode;

Data query: Check and export test record

5.2.1.Parameter setting


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参数配置 Parameter configuration

试验编号 Test number

谐振高压 Resonance high voltage

过流保护 Overcurrent protection

耐压时间 Withstand voltage time

扫频电压 Sweep voltage

分压器比 Voltage divider ratio

选择 Select

数据 Data

确认 Confirm

保存 Save

Test parameter setting: before each time test , please correctly set the various

parameters of this time test!


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Test voltage

Serial number: Press left or right arrow keys to confirm, and press up or down

arrow keys to alter data. This setting is normally default, and the data will plus

one automatically for every single test.

Resonance high voltage: Press left or right arrow keys to confirm, and press

up or down arrow keys to alter data. This setting is for confirming testing

voltage of test object.

Overcurrent protection: Press left or right arrow keys to confirm, and press

up or down arrow keys to alter data. This setting is for confirming overall

power and current of test object during test.

Withstand voltage time: Press left or right arrow keys to confirm, and press

up or down arrow keys to alter data. This setting is for confirming withstand

voltage time of test object during withstand voltage test.

5.2.2. Automatic test


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自动测试 Automatic test

本次编号 Test number

Wr保护 Wr protection

调压 Voltage adjustment

低压电流 Low-voltage current

调频 Frequency adjustment

过流保护 Overcurrent protection

谐点 Resonance point

计时 Timing

按确认键运行 Press “Confirm” to run

退出 Quit

After entering into the interface, check if the parameter is correct or not, press


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“Quit” after fill in a new parameter, and press “Confirm” to test. At the beginning of

entering into the system, sweep frequency firstly, and then automatically boost the

voltage to the set value after finding the resonance point. On reaching to the set

voltage value, count down, and reduce voltage automatically when timing is finished.

The interface is then switched to test results, and the test is finished.

5.2.3. 手动试验

Manual test

手动测试 Manual test


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调压 Voltage adjustment


调频 Frequency adjustment

计时 Timing

谐点 Resonance point

选择 Select

退出 Quit

自动扫频 Automatic sweeping

按确认键运行 Press “Confirm” to run

Automatic sweeping: Press up or down arrow keys to select for confirmation,

automatic sweeping from 30 to 300Hz, find out the frequency of resonance point and

record the frequency from frequency point to output resonance point.

Voltage adjustment: Press up or down arrow keys to select for confirmation,

output voltage proportion adjustment. (Coarse adjustment by up or down arrow keys,

and fine adjustment by left or right arrow keys.)

Frequency adjustment: Press up or down arrow keys to select for confirmation,

output frequency adjustment. Coarse adjustment by up or down arrow keys, and fine

adjustment by left or right arrow keys. (2Hz by up or down arrow keys, and 0.1Hz by

left or right arrow keys)

Timing: When output voltage reaches the set value, start “count down” and lock

boosting key. Reduce voltage automatically when counting down is finished. The

interface is then switched to test results, and the test is finished.

5.2.4. Records query


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数据查询 Data query

查询编号 Query number

选择 Select

数据 Data

退出 Quit

确认运行 Confirm Run

Press left or right arrow keys to select data bit, and press up or down arrow keys to


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alter data. Press “confirm” to query about the historical data record of the query

number. Press “print” for printing.

Historical data record A

Normal test result

试验结果 Test result





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谐振频率 Resonant frequency


试验日期 Test data

试验时间 Test time

打印 Print

退出 Quit

Historical data record B

Overcurrent protection, indicating too large current during the test on the

whole.


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警告过流保护 Warning! Overcurrent protection



低压电流 Low-tension current





打印 Print

退出 Quit

Historical data record C

Overvoltage protection, which means the voltage is beyond the pre-set value

during test.


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警告过压保护 Warning! Overvoltage protection







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打印 Print

退出 Quit

Historical data record D

Detuning and flashover protection, which means there are test object or other

abnormal failure during test.

If this interface appears during test, please check the test object carefully (It is

suggested to conduct insulation and DC withstand voltage test by insulation

meter or DC high voltage generator). If no problem is found, go on with the

test with resonance test device.


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警告失谐 OR闪络保护 Warning! Detuning OR flashover

protection








打印 Print

退出 Quit


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Enter into the state of system timing


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选择 Select

数据 Data

确认 Confirm

保存 Save

打印 Print

退出 Quit

Press left or right arrow keys to select data bit, and press up or down arrow

keys to alter data. Press “Print” to quit and save the altered data.

Chapter VI Trouble Shooting

General cautions

1.The device shall be operated by specialized person of high voltage test, and

please read the operation manual carefully and practice repeatedly before use.

2.No less than two persons shall be needed for operation. During operation,

please strictly follow the safe operation rules about high voltage test formulated by

our company.

3.To ensure the safe and correct test, please strictly follow relevant national

standards and regulations for test operation, besides of the product manual.

4.The wires shall not be connected wrong, or else the test device may be

damaged.

5.When operating the device, high voltage or ultra-high voltage is output, so


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should be reliably grounded. Pay attention to operational safety.

6.2Common fault causes and trouble shooting

1.Fan can’t be started

（ 1） After emergency stop, fault protection or detuning protection,

“Fault resetting” has not been pressed down;

（ 2 ） Excess temperature inside, and thermal protection of power

component has acted;

Faults removing method: Cut off power supply, leave the device for about 30

minutes and switch on the power again, press “Resetting” on instrument panel and

start the device again.

If the fan could not be started, please contact the manufacturer, and do not

disassemble the device!

Automatic tuning is impossible and resonance point could not be found:

Phenomenon:

After tuning, the device gives the prompt of not finding resonance point.

Cause:

Not reliable circuit loop grounding, wrong circuit loop wiring, emergency stop

key not been reset (light on), open circuit of an instrument

排除方法：

Faults removing method:

1） Check whether the earth device is reliable, if there’s any cut-off point?

2） Check on-off of the high-voltage and low-voltage coil of excitation

transformer;


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3） Check each of the electric reactors;

4） Check signal line of the voltage divider;

5） Check the high and low-voltage capacity side of voltage divider;

6） If there’s no resonance point when the device increase voltage

automatically, also need to check the compensating capacitor.

If all the parts are normal, while not any resonance point is found, please

contact the manufacturer, and do not disassemble the device!

3 Voltage could not be increased to the test voltage

现象：

Phenomenon:

1） Lower peak of tuning;

2） During test, primary voltage is high, and high voltage is relatively low;

even when the voltage has not reached to the test voltage, primary voltage

had reached to rated voltage, and the voltage of circuit loop reduced

automatically;

Causes:

1） Electric reactor doesn’t match with capacity of test object, and resonance

point has not been found correctly;

2） Test object has large comsuption, and Q value of the system is too low;

3） The high voltage output of exciting transformer is too low;

4） High voltage connecting line is too long or high voltage corona discharge

wire has not been adopted

Faults removing method:


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1） Connect the compensating capacitor into test loop in parallel, so as to

increase the capacity of circuit loop;

2） Try to connect multiple electric reactors in series, so as to increase

inductance value of circuit loop;

3） Increase output voltage of excitation transformer;

4） Drying treatments for test object, enhance insulating strength of test object,

and reduce active loss of loop;

5） Generally when the device has relatively high voltage output, adopt high

voltage corona discharge wire, or displace common high voltage output

wire with shorter wire, not more than 5m generally.

If all the above mentioned has been done, and the fault could not be

removed, please contact the manufacturer, and do not disassemble the device!

Chapter VII Wiring DiagramWiring Diagram of Electric Reactors in Parallel

Wiring Diagram of Electric Reactors in Series


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Chapter VII Relative Information

8.1Capacity selection of resonance deviceTest current: I=2πfCU×10-3 (A)

Frequency selection (HZ)1、Generator - 50HZ, take 50HZ2、Transformer - 45~65HZ, take 50HZ3、GIS, switch, busbar - 30~300HZ, take 45HZ4、Power cable: 30~300HZ, take 35HZVoltage selection （KV）Confirm the highest test voltage according to regulations.Electric capacity selection (uf)Confirm according to the maximum electric capacity of test objectMaximum capacity of the device: P=UI×1.25 (KVA)

8.2Cable testing regulations of relevant provinces in China


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Cross linked cable testing regulations of some areas (provinces) of China

(revised)

Provinces: Jiangsu, Anhui, Hubei,

Fujian

Voltage class of cable

Acceptance test

Test frequency

30～300Hz

Page 1 of 4

Preliminary test


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(revised)

Provinces: Zhejiang Voltage class of cable

Acceptance trial

Medium and low voltage 45～65Hz

High voltage 35～75 Hz

Page 2 of 4

preliminary test


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(revised)

Provinces: Northern China Test frequency

1～300 Hz Acceptance trial

preliminary test

Shandong

Page 3 of 4

20～300 Hz Acceptance trial

preliminary test


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(revised)

Provinces: Jilin Test frequency

20～

70 Hz

Acceptance trial

preliminary test

Guangdong, Guangxi, Guizhou,

Yunnan

Page 3 of 4

20～

300

Hz

Acceptance trial

preliminary test

hz-108kva/108kv seriesresonance withstandtestset · 2017-10-30 ·...

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