產品簡介

NAXZ系列全自動變頻串聯諧振高壓試驗裝置，主要針對10kV、35kV、110kV、220kV、變電站及線路等所有電氣主設備的交流耐壓試驗設計制造。電抗器采用多只分開設計，既可滿足高電壓、小電流的設備試驗條件要求，又能滿足低電壓的交流耐壓試驗要求，具有較寬的適用范圍，是地、市、縣級高壓試驗部門及電力安裝、修試工程單位理想的耐壓設備。

產品別名

變頻諧振、變頻串聯諧振、串聯諧振、串聯諧振變壓器、串聯諧振試驗設備、便攜式電纜耐壓試驗裝置、串聯諧振系統

產品特性

1、所需電源容量大大減小。串聯諧振電源是利用諧振電抗器和被試品電容諧振產生高電壓和大電流的，在整個系統中，電源只需要提供系統中有功消耗的部分，因此，試驗所需的電源功率只有試驗容量的1/Q。

2、設備的重量和體積大大減少。串聯諧振電源中，不但省去了笨重的大功率調壓儀器和普通的大功率工頻試驗變壓器，而且諧振激磁電源只需試驗容量的1/Q，使得系統重量和體積大大減少，一般為普通試驗儀器的1/10-1/30。

3、改善輸出電壓的波形。諧振電源是諧振式濾波電路，能改善輸出電壓的波形畸變，獲得很好的正弦波形，有效的防止了諧波峰值對試品的誤擊穿。

4、防止大的短路電流燒傷故障點。在串聯諧振狀態，當試品的絕緣弱點被擊穿時，電路立即脫諧，回路電流迅速下降為正常試驗電流的1/Q。而并聯諧振或者試驗變壓器方式做耐壓試驗時，擊穿電流立即上升幾十倍，兩者相比，短路電流與擊穿電流相差數百倍。所以，串聯諧振能有效的找到絕緣弱點，又不存在大的短路電流燒傷故障點的憂患。

5、不會出現任何恢復過電壓。試品發生擊穿時，因失去諧振條件，高電壓也立即消失，電弧即刻熄滅，且恢復電壓的再建立過程很長，很容易在再次達到閃絡電壓前斷開電源，這種電壓的恢復過程是一種能量積累的間歇振蕩過程，其過程長，且不會出現任何恢復過電壓。

產品參數

1.變頻電源(一臺)：

1.1技術參數

1.1.1 額定功率：5.5-500kW；

1.1.2 輸入電壓：三相 380V±5% 或單相220V±5% 45～65Hz，當電源為380V時，可做額定負載試驗；當電源為220V時，只可做1/2負載試驗。

1.1.3 輸出電壓：0～400V可調

1.1.4 輸出電壓頻率：20～300Hz  

1.1.5 頻率調節:0.1Hz步進可調

1.1.6 頻率不穩定度:≤0.02%

1.1.7 輸出電流：13～1250A

2. 高壓電抗器

2.1 技術參數

2.1.1 額定工作電壓：0～1000kV

2.1.2 額定工作電流：1～10A

2.1.3 額定電感量：30～600H

2.1.4 連續工作時間：15min

2.1.5 溫    升：小于60℃

2.1.6 工作頻率：20~300Hz

3. 激勵變壓器(一臺)：                                     

3.1 技術參數

3.1.1 額定容量：3.5～500kVA

3.1.2 輸入電壓：當容量在5.5～20kW輸入是200V/400V

當容量在20～500kW輸入是400V

4. 電容分壓器(一臺)：

4.1 技術參數

4.1.1自身電容量：300～5000pF

4.1.4額定電壓:10～1000kV

4.1.2工作頻率：20～300Hz

4.1.3不確定度：1.0%

Product introduction

NAXZ series frequency series resonant is mainly designed for 10kV, 35kV, 110kV, 220kV, substations and loop and all electrical main AC voltage test equipment design and manufacturing. Reactor uses more than just separate design, not only can meet the high-voltage, low-current device test conditions requirements, but also can meet the low voltage AC voltage testing requirements. It has a wide scope, is the ground, city, county high voltage test departments and electrical installation, repair and test engineering units ideal for pressure equipment.

Also called name

Frequency resonant, frequency series resonant , series resonance, series resonant transformer, series resonant testing device, portable cable withstands testing device, series resonant system

The Characteristics of the products

1,Reduce the power capacity greatly. The series resonant power supply utilizing the resonant reactor and the sample capacitor resonant generate high voltage and high current. In the whole system , the power system only provide the part of the active consumption, therefore, the needed power is  1 / Q of the testing capacity.

2,Reducing the weight and volume greatly. In the series resonant power supply , not only to eliminate bulky power regulator, power instruments and other common frequency test transformer and resonant excitation power simply test the capacity of 1 / Q, making the system significantly reduces the weight and volume , usually common test instrument 1/10-1/30 .

3,To improve the output voltage waveform. Resonant power supply is a resonant filter circuit , can improve the output voltage waveform distortion, get a good sine wave , effectively prevent the harmonic peak error for the test product breakdown .

4,To prevent large short-circuit current fault burns. In the series-resonant state, when the test insulation breakdown weaknesses , the circuit is immediately off the harmonic , the loop current is rapidly decreased to normal test current of 1 / Q. The parallel resonant transformer test or way of doing pressure test , the breakdown current immediately increased several times, both compared to short-circuit current and the breakdown current difference between the number of times. Therefore, the series resonance can effectively find insulation weaknesses, without the presence of large short-circuit current suffering burns the point of failure .

5,There will be no recovery over voltage. Sample breakdown occurs when the loss of resonance conditions , the high voltage is also disappear immediately , instantly extinguish the arc , and the recovery voltage re- building process is very long, it is easy to reach flash over voltage again before disconnecting the power , this voltage is restored process is an intermittent oscillation energy accumulation process , the process is long .

The parameters of the products

1 Variable frequency power source( 1piece ) :

1.1 Technical Parameters

1.1.1 Rated power :5.5-500kW;

1.1.2 Input voltage: three-phase 380V ± 5% or single-phase 220V ± 5% 45 ~ 65Hz, when the power supply is 380V, can test the rated load ; when the power supply is 220V, only can test  1/ 2 load.

1.1.3 Output voltage : 0 ~ 400V adjustable

1.1.4 Output voltage frequency : 20 ~ 300Hz

1.1.5 Frequency adjustment : 0.1Hz step adjustable

1.1.6 Frequency instability : ≤ 0.02%

1.1.7 Output Current : 13 ~ 1250A2. High Voltage Reactor

2.1 Technical Parameters

2.1.1 rated voltage :0-1000kV

2.1.2 Rated current :1-10A

2.1.3 Nominal inductance :30-600H

2.1.4 Continuous working time : 15min

2.1.5 Temperature rise : less than 60 degrees

2.1.6 Operating frequency : 20 ~ 300Hz 3. Excitation transformer ( a ) :

3.1 Technical parameters

3.1.1 Rated Capacity :3.5-500kVA

3.1.2 Input voltage: 5.5-20kW capacity when input is 200V/400V, when the capacity is in the 20-500kW 400V input

4 capacitive divider ( a ) :

4.1 Technical Parameters

4.1.1 own capacity :300-5000pF

4.1.4 Rated voltage :10-1000kV

4.1.2 Operating frequency : 20 ~ 300Hz

4.1.3 Uncertainty : 1.0%