[艾爾電氣 介損測試儀執(zhí)行標(biāo)準(zhǔn)] |
DL/T962-2005
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[艾爾電氣介損測試儀 產(chǎn)品簡介] |
全自動抗干擾異頻介損測試儀，是一種測量介質(zhì)損耗角正切和電容值的自動化儀器?？梢栽诠ゎl高電壓下， 現(xiàn)場測量各種絕緣材料、絕緣套管、電力電纜、電容器、互感器、變壓器等高壓設(shè)備的介質(zhì)損耗角正切和電容值。與西林電容電橋相比，具有操作簡單、自動測量、讀數(shù)直觀、無需換算、精度高、抗力強(qiáng)等優(yōu)點(diǎn)。儀器內(nèi)部有標(biāo)準(zhǔn)電容器和升電壓裝置，在“內(nèi)接”方式下使用，無需其它外接設(shè)備，便于攜帶。
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[艾爾電氣介損測試儀產(chǎn)品特征] |
1、具有多種測量方式，可選擇正/反接線、內(nèi)/外標(biāo)準(zhǔn)電容器、CVT測量和內(nèi)/外試驗(yàn)電壓測量。
2、抗干擾效果好：能有效地消除強(qiáng)電場干擾，適用于500KV及以下電站干擾現(xiàn)場的試驗(yàn)。
3、高壓短路和突然斷電時，儀器能迅速切斷高壓，并發(fā)出警告信息。
4、測量重復(fù)性好，電壓線性好（測量準(zhǔn)確度不受電壓影響）。
5、一體化結(jié)構(gòu)，重量適中，便于攜帶。
5、大屏幕中文提示操作，使用方便。
6、自帶打印機(jī)，及時打印測試數(shù)據(jù)。
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[艾爾電氣介損測試儀 產(chǎn)品參數(shù)] |
1. | 使用條件 | -5℃∽40℃ | RH＜80% | 2. | 電源 | AC 220V±10% | 頻率無限制 | 3. | 高壓輸出 | 1KV∽10KV | 每隔1kV |
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| 精 度 | 5% |
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| 電流 | 140mA |
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| 容量 | 1000VA | 5. | 自激電源 | AC 0V∽30V | 45HZ/55HZ |
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| 電流 | 15A | 6. | 分辨率 | tgδ:0.001% | Cx: 0.1pF | 7. | 精度 | △tgδ:±(讀數(shù)*1.0%+0.040%) |
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| △C x :±(讀數(shù)*1.0%+1.0PF) | 8. | 測量范圍 | tgδ | 無限制 |
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| C x | 15pF＜Cx＜100000 pF |
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| 10KV | Cx＜30000 pF |
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| 5KV | Cx＜60000 pF |
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| 1KV | Cx＜100000 pF |
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| CVT測試 | Cx＜100000 pF | 9. | 外型尺寸 | 470（L）×320（W）×390（H） | 10. | 重量 | 30 Kg |
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根據(jù)用戶具體要求，設(shè)計相應(yīng)的產(chǎn)品配置方案。 |
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AL112Dielectric loss tester
Implementation of standards.
DL/T962-2005
The series of equipment, which is mainly used in HV substation engineering project or in test room, gives a precision test on capacity, inductance and dielectric loss of HV capacitive and inductive test object.
1. Main components of the equipment:
HV variable frequency power supply to provide test signal for internal HV test mode
Built-in standard capacitor served as test reference in the mode of inner standard
Digital HV capacitive bridge served as main circuit of sample and measurement
High speed processing unit of digital signal high speed FFT transformation and digital filtering of the sampled signal
Controlling system realizing full-auto intelligent test
Key technology :
Adopt digital frequency technology; application of double frequency 45Hz/55Hz test avoids interference from 50Hz power network, thus making test results of high accuracy possible under interference of 50Hz high electric field in test site.
When in internal HV test mode, keep a track of frequency of power network, in accordance of which frequency of test signal is determined, and at the same time FFT frequency keeps a strict pace with test signal frequency, thus guaranteeing a perfect result in suppression of 50Hz/60Hz power network interference. For the algorithm, it will ensure a throughout elimination of interference from power network, with theoretical residue being 0.
The adoption of synchronous sampling technology presents a simultaneous sampling on two-way of test signals of standard circuit and measuring circuit, greatly improving measuring accuracy of dielectric loss.
Function and index
1. Basic function
Test of dielectric loss of CVT equipment through self-excitation;
Built-in standard capacitor
Grounded connection and ungrounded connection for selection
Three modes of tests for selection, internal HV single-frequency test, internal HV variable frequency test and external HV test;
In an external HV test, keeping track of its frequency which is strictly equal with external HV frequency;
Test procedure: retarded voltage step-up─>measurement─>voltage step- down─>display test result;
Built-in microprinter synchronizes printing of test result and follow-up test;
Through man-machine interface, data of current ambient temperature and humidity are input, which can be saved and printed together with test result;
Grounded protective detection: start ground protection when enclosure charges dangerous voltage due to poor grounding of equipment;
Over current protection: capable of effective quick protection and not causing human danger and equipment damage, when over current emerges from short circuit of test object and test wire touching ground.
2. Main technical index
Capacitive test
Test range: 10pF-63000pF varying from model to model
Test accuracy: ±（reading ×1％＋1pF）
s resolution: 0.01pF
Dielectric loss test
Test range: 0-50％
Test accuracy: ±（reading×1％±0.0004）
resolution: 0.0０1％
Detecting range of current of test object: 31uA-1A
Frequency tracking: range 45Hz-65Hz
Power source of internal HV test: nominal frequency 50Hz, 60Hz
Internal HV output frequency is related to power network owing to application of power network tracking technology.
When setting the test frequency, actual output frequency of internal HV and frequency of power network conform to the following ratio: 90%、99%、110%、120%
For example, when frequency of power network is at 60Hz:
When set at 60 single frequency, actual output frequency is 60×99%=60Hz
When set at 54Hz＼66Hz double frequency, actual output frequency is 60×90%=54Hz and 60×110%=66Hz
Voltage range: 0.5-10kV
Voltage setup: 0.5kV stepping
Voltage displaying range: 0.1-9.99kV
Voltage displaying accuracy: ≤±(1.5％×reading+5V)
Max output current: 200mA
Rated output power: 500W-2000W varying from model to model
Running method: continuous running for ≤15min
Power source of CVT test: auxiliary winding output of power source of internal HV test is used as the power source of CVT test.
Output voltage: ≤50V
Output current: ≤15A
Test voltage: ≤3000V
Power supply:
Voltage: 220V±10%
Frequency: 50Hz±0.5Hz/60Hz±0.6Hz
Ambient condition:
Temperature range: -10℃～55℃
Relative humidity:＜90％
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