中频直流高压发生器NKZGF系列
Intermediate frequency DC high voltage generator NKZGF series
Field test of this product is suitable for all kinds of high voltage electrical power sector, Zinc Oxide arrester, power cable DC voltage and leakage test. And do the electrostatic dust, spraying power. Using pulse width modulation (PWM) technology, IGBT, and advanced electronic circuit and components, with output is not interfered by the fluctuation of the power grid, there is zero, over-current, over-voltage breakdown, protective measures, whether the overcurrent, overvoltage protection circuit breakdown, can rapid action, effective protection equipment and personnel safety. The design of the new "0.75U" LCD can display directly and latch the 0.75U1mA field test without manual calculation. The instrument has the advantages of small volume, light weight, large power, easy to carry, convenient operation, safety and reliability etc..
Technical parameters
The output voltage rating: 60KV ~ 300KV
The output current: 1mA ~ 5mA voltage meter, ammeter accuracy: + 3%
The output power: 120VA ~ 600VA
If the power supply voltage: AC220V + 10%
Three, the working principle diagram
1 overvoltage set 2 voltage display 3 is connected with a 220V power supply output 5, 4 intermediate frequency current display 6.. Ground 7 power switch, the 8.0.75UDC-ImA function key 9 voltage regulating potentiometer 10 high pressure through 11 high pressure off / power through 12 intermediate frequency input 13 ground 14 high voltage output
Connection method: 3 AC power 220V
4 take 12 (four or five core cable)
6 and 13 grounding (earthing with special)
The display control box on the lamp, switch, knob has marked clearly, see the instructions please refer to the name of the control box panel component using.
- double pressure cylinder chassis side (four) of five core socket to socket connection control box cable, the chassis side copper wiring column for the ground terminal for connection with the ground wire.
Table of high voltage shielding current - incidental to the digital microammeter, table top for connecting jack sample line jack, and also as a power switch, please don't pull the plug, it will automatically shut off power supply. Change the battery when you cover rotation, after the change please cover screwing.
1, the use of preparation
The DC generator should check their readiness before use, the connecting cable should not be open circuit and short circuit, equipment without rupture damage.
The chassis, times of pressure cylinder is arranged to a safe location appropriate, are respectively connected with the power cord, the cable and the grounding wire. Protective grounding and grounding wire and wire work discharging rod ground shall separately received the sample (i.e., a point on the ground) and ensure good grounding. It is strictly prohibited to the grounding wire are connected in series to use, so as to avoid the breakdown potential elevation to form strike back, damage the instrument.
The check if the power switch in the off position, and check the pressure regulating potentiometer should be at zero, over voltage protection setting dial switch is arranged at the appropriate position, generally 1.10 ~ 1.20 times of testing voltage value.
2, no-load boosting verification over voltage protection setting value
Please look for the power supply is single phase AC 220V, 50Hz. connected to a power switch, the power supply is switched on at the green light, said.
According to the red button, then the red light, said high voltage switch on.
The clockwise gently regulating the regulator potentiometer, output end is raised from zero to. The voltage table shows the load test voltage on the (KV) value, current meter displays the current through the sample and all the leakage current and the current to the microampere (uA) as a unit. Up to the desired voltage, according to the prescribed time recording current meter readings, and check the control box and an output cable no abnormal phenomenon and sound.
The blood pressure, the pressure regulating potentiometer back to zero, then press the green button, cut off the high voltage and turn off the power switch.
3, to test products for leakage and DC withstand voltage test
In the load test will do before the high pressure shielding microammeter is mounted to the high voltage output end of the voltage doubling cylinder, and special high-voltage line matching are respectively connected to the microammeter and test on.
The inspection instrument, discharging rod, double voltage tube, sample the connecting line and the ground wire is correct, the grounding wire connection is reliable, high pressure safety distance check whether meet the requirements, high voltage test can start test products.
The check instrument without exception, connected to a single-phase AC 220V power switch, at this time the green light, that the power supply is switched on. To DC sample leakage and DC withstand voltage test.
The press the red button, then the red light, said high voltage is switched on, to be high pressure rise.
The clockwise gently regulating the regulator potentiometer, output end is raised from zero to. Boost speed to 3-5kV per second test voltage should be increased. For large capacitive objects need to boost when slow step, otherwise it may cause the voltage overshoot, also need to monitor current meter maximum charging current for charging current does not exceed the DC generator. When up to the desired voltage or current, according to the prescribed time recording current meter and meter reading.
It can test after completion, buck, the pressure regulating potentiometer back to zero, then press the green button, cut off the high voltage and turn off the power switch.
He after the test, application of the discharge times of the discharging rod sample, after discharge can be near the sample with the stitch work (discharge in detail please see discharge rod manual). Product such as zinc oxide lightning arrester, lightning arrester voltage magnetic blow slowly adjust pressure regulating potentiometer boost to the required test for small capacitance (current) value, and then read out the voltage from a digital display meter (current) value. If the measurement to be carried out on 75%VDC-1mA zinc oxide arrester, should rise to the current to 1000uA when the voltage value stops (then can record the voltage and current values), and then press the yellow button, voltage is reduced to 75% of the original, and remains in this state. This can be read and numerical microammeter
He after the test, application of the discharge times of the discharging rod sample, after discharge can be near the sample with the stitch work (discharge in detail please see discharge rod manual). Product such as zinc oxide lightning arrester, lightning arrester voltage magnetic blow slowly adjust pressure regulating potentiometer boost to the required test for small capacitance (current) value, and then read out the voltage from a digital display meter (current) value. If the measurement to be carried out on 75%VDC-1mA zinc oxide arrester, should rise to the current to 1000uA when the voltage value stops (then can record the voltage and current values), and then press the yellow button, voltage is reduced to 75% of the original, and remains in this state. This can be read and numerical value of voltage microammeter. After measurement, pressure regulating potentiometer counterclockwise to the zero position, press the green button, again press the red button to boost. For large capacitance samples, boost should be more slowly, and the need for maximum charge current monitor current meter charging current does not exceed the generator, we must slow down the step-up speed, avoid the charging current is too large. After the test, the voltage adjustment potentiometer counterclockwise to the zero position, then press the green button, cut off the high voltage. At this time pay attention to voltage table is reduced to approximately 20kV, available in discharging rod of the discharge times, to ensure the safety of.
4, found in the use of the red light, green light, DC high voltage drop, namely for the relevant protection action. At this point should be operated according to the following steps:
The pressure regulating potentiometer will return zero.
The turn off the power switch, panel lights are off.
The one minute later, a standby in low voltage capacitor discharge fully, was allowed to turn on the power switch again. Re no-load test, and to find out the situation, once again boost test.
5, pay attention to: do you want to install cable test, the current limiting resistor used. (not the current limiting resistor using other tests,), only 120KV above.
In six, the matters needing attention
1, to ensure personal safety, then repeatedly remind an user the attention control box and double pressure cylinder good grounding and after shutdown test products and double pressure cylinder discharge problem.
2, to prevent the entry of foreign matter such as control box, control box with a fan, should always check whether the normal operation of the fan.
3, when the times of pressure cylinder insulation cylinder when dirty please wipe with a dry cloth, do not use alcohol, gasoline and other organic solvent scrubbing. Available detergent insulating cylinder surface, such as dry before use, transport or when not in use, please put in the oven.
4, change the insurance tube, please press the fuse adjacent calibration amperage replacing fuses.
5, if the high pressure shielding microammeter displays "LOW BAT", replace the 9V battery, in order to avoid measurement errors.
6, without permission, please do not open the control box and double pressure cylinder, otherwise it will affect the product warranty, disassemble the manufacturer is not responsible for.
7, instrument transportation should avoid rain erosion, to prevent the collision and falling.
Seven, check the troubles and treatment
Now as in the original for processing
The 1 power switch is switched on after the green light 1 power line open circuit
The 2 power supply fuse fuse fuse replacement replacement power line
2 press the red button to the red light does not shine pressure regulating potentiometer not back to zero potentiometer back to zero
3 press the red button to the red light, red light a boost
Arc, the green light by high voltage output end of sample output cable short circuit check
Check sample
The 4 boost in the process of red light out green light sample discharge or breakdown of overvoltage or overcurrent protection
Protective action check sample reset setting value
According to the above method still can not eliminate the fault, please contact us.
Eight, the product set
1, control cabinet 1;
2, double pressure cylinder 1;
3, the power supply line 1;
4, the intermediate frequency output cable 1 root;
5, a spare fuse 5A 5;
6, the use of specification 1;
7, product inspection certificate and warranty card 1;
8, product factory acceptance test report 1;
9, the discharge rod 1 sets;
10, a special ground 1;
11, the high-pressure connecting line 1
1 sets of 12, aluminum alloy box
Nine, other supporting products
High voltage shielding digital microammeter
Four, NKZGF series of DC high voltage generator specifications and main technical performance
Specifications
Technical parameters of 40/4 60/2 60/5 120/2 120/3 120/5 200/2 200/3 200/5 300/2 300/5
Rated voltage (KV) 406060120120120200 200200300300
Rated current (mA) 42523523 525
Rated power (W) 160120300240360600 40060010006001500
Voltage measurement accuracy digital display + (1% readings + 0.2KV)
Current measurement accuracy digital display + (1% readings + 2)
Ripple coefficient is less than or equal to 0.5%
Voltage stability of stochastic volatility, changes in the supply voltage is less than or equal to 1% + 10%
The overload capacity of no-load voltage may exceed the rated voltage 10% to use ten minutes maximum charge current is 1.5 times of rated current
Power single phase AC 50 Hz 220 V + 10%
Work methods used intermittently
A continuous time for a maximum of 30 minutes
Working temperature: -10 to 40 DEG C
Relative humidity: room temperature to 25 DEG C of not more than 85% (no gel)
Altitude: 1500 meters
With capacitance load capacity is unlimited sample capacitance
Rated current can be 1.5 times the charge
The structure characteristics of epoxy glass steel insulating electrical double pressure cylinder
Air insulation, leak free of worry
Operation box features high precision 0.75UDC--1mA single touch button (accuracy = 1%) is most suitable for zinc oxide lightning arrester test
Overvoltage protection using dial code set, stick out a mile
Vertical chassis international standard horizontal type, the scene is more convenient
Note: the equipment of high voltage 40KV integrated directly with the mopping the cable leads. For other models and manufacturers direct contact custom.
Five, instructions for use
Safety warning
The experimental personnel - DC high voltage tester must be "high voltage test certificate" professionals
- the use of the instrument please users must according to the provisions of the "power of safety regulations" article 168, and in the work of power into the tester before the installation of two obvious breaking point
- DC high voltage of 200KV and above, although the test personnel wear insulating shoes and at a safe distance from the outside, but because of the influence of high voltage DC ion distribution, will make the neighboring body with different DC potential, testing personnel do not shake hands or hand touching the ground body, otherwise there will be a mild electric shock phenomenon, generally will not the damage of artificial. Cable test must use the current limiting resistor.
- to large capacitor sample discharge, discharge rod can not be immediately contact test products, should be first discharging rod gradually close to the sample, to a certain distance from the air gap began to free discharge hissing. When no sound when the available discharge rod discharge, the last direct grounding discharge.
A brief introduction of the
Series NKZGF DC high voltage generator is in accordance with China industry standard ZBF 24003-90 "portable DC high voltage generator general technical conditions" requirement, the portable DC high voltage generator research, manufacture, application of DC high voltage test in electric power departments, factories and mines power departments, scientific research units, railway, chemical industry, power plants and so on zinc oxide lightning arrester, magnetic blow lightning arrester, power cable, generators, transformers, switches and other equipment.
Series NKZGF DC high voltage generator using frequency doubling circuit, the first application of PWM intermediate frequency pulse width modulation technology, the new closed-loop adjustment, using a voltage feedback, the voltage stability greatly improved. The use of high power IGBT devices excellent performance and drive technology, and according to the theory of electromagnetic compatibility, the use of special shielding, isolating and earthing measures. The DC high voltage generator with a high-quality, portable, and can withstand without damage to the rated voltage of discharge.
The main parts of NKZGF series high voltage DC generator instrument adopts advanced technology the United States, Germany, Japan and other countries of the components, making the instrument more reliable and more stable, double pressure cylinder has the advantages of small volume, large capacity, strong overload capacity, convenient field operation test. Our company regards quality and reputation for life, improve the level of science and technology, creating quality products, to meet the needs of users.
Two, product characteristics
1 similar products, smaller volume, lighter weight, more beautiful, more reliable, simple operation, complete function, convenient field use.
2, the use of advanced technology, manufacturing process, a pioneer in the application of pulsed PWM intermediate frequency pulse width modulation technology, the new string array logic modulation by using high power IGBT device and voltage feedback, so that the output voltage stability is higher, ripple coefficient is smaller.
3, the instrument main parts adopt imported advanced technology the United States, Germany, Japan and other countries of the components, durable, not afraid of continuous to direct short circuit discharge.
4, high precision, accurate measurement. Voltage, current meter are digital display voltage resolution of 0.1kV, the current resolution of 1uA, the control box on the table directly display the voltage in the load test voltage products value, without additional voltage divider is used, simple wiring. The instrument has high and low pressure end measure leakage current, high voltage end adopts a circular shield digital table shows, not afraid of discharge impact, good anti-interference ability, suitable for field use.
5, voltage regulation, high stability, full range of smooth voltage, output voltage regulation using imported single multi turn potentiometer, boost stable process, high accuracy of regulation.
6, the negative output, zero start, continuously adjustable, over voltage, over current, back to zero, ground protection, unique disconnection protection and various protection functions. Automatic protection circuit function is strong, perfect and reliable protection, the safe operation, various technical indicators are better than the industry standard.
7, add high precision 75%VDC-1mA function, make zinc oxide lightning arrester measure bring great convenience. Gently press without calculation. A voltage function key 75% the instrument control box, doing arrester test, when the current is increased to 1000uA, press the 0.75UDC--1mA button, then the voltage meter, ammeter display value is 75% of the data, done immediately after the pressure adjusting potentiometer back to zero, and should immediately press the green button, cut off the high voltage and turn off the power switch. Then do the other test.
Over voltage setting function 8, convenient, uses digital dial switch, can the tuning voltage value display, make your operation more casual, display numerical units for kV.
9, double pressure cylinder using American technology to develop production, intermediate frequency transformer by the expert of special design, small size, large capacity, strong overload capacity, convenient field operation test.
10-1, at the bottom of a Tibetan three inner supporting feet, stability increases times pressure cylinder. (for 200KV)
10-2, the control box cover as a windbreak base, plug in and double pressure cylinder, enhance the stability of double voltage tube.
本产品适用于电力部门各种高压电器的现场试验,氧化锌避雷器、电力电缆直流耐压和泄漏试验。兼做静电吸尘、喷涂等电源。采用脉冲宽度调制（PWM）技术、IGBT、以及先进的电子线路及元件，具有输出不受电网波动干扰，有零位、过流、击穿、过压等保护措施，无论过流、击穿、过压保护电路都能迅速动作，有效保障设备及人员安全。全新设计的“0.75U”液晶显示器可直接显示并锁存0.75U1mA现场试验不需人工计算。本仪器具有体积小、功率大、重量轻、便于携带、操作方便、安全可靠等优点。
技术参数
※ 输出电压等级：60KV～300KV
※ 输出电流：1mA～5mA※ 电压表、电流表准确度：±3%
※ 输出功率：120VA～600VA
※ 电源电压：AC220V±10%
三、工作原理框图
1．过压设定2.电压显示3. 接220V电源4. 中频输出5.、电流显示6.. 接地7. 电源开关、8 . 0.75UDC-ImA功能键 9. 调压电位器 10. 高压通 11. 高压断/电源通 12. 中频输入 13. 接地 14. 高压输出
接线方法：3接交流电源220V
4接12（四或五芯电缆线连接）
6和13接地（用专用接地线）
● 控制箱上的显示灯、开关、旋钮等已标清楚，看此操作说明时请参照控制箱的面板上元器件名称使用。
● 倍压筒底盘侧面有（四）五芯插座为联接控制箱电缆之插座，底盘侧面有铜接线柱为接地端子作连接地线用。
● 附带的高压屏蔽电流表为数显微安表，表顶端上的插孔为连接被试品的线插孔，同时也作为电源开关，不用时请拔掉插头，就自动关闭电源。换电池时请将后盖旋下，换好后请将后盖旋紧。
1、使用前准备
⑴ 直流发生器在使用前应检查其完好性,联接电缆线不应有断路和短路，设备无破裂等损坏。
⑵将机箱、倍压筒放置到合适的安全的位置，分别联接好电源线、电缆线和接地线。保护接地线与工作接地线以及放电棒的接地线均应单独接到试品的地线上(即一点接地)并确保接地良好。严禁各接地线相互串联使用，以免击穿时地电位抬高形成反击，损坏仪器。
⑶ 检查电源开关是否在关断的位置上，并检查调压电位器应在零位上,过电压保护整定拨盘开关设置在适当的位置上，一般为1.10～1.20倍测试电压值。
2、空载升压验证过电压保护整定值
⑴ 请认准电源是单相交流220V，50Hz.接通电源开关,此时绿灯亮,表示电源接通。
⑵ 按红色按钮，则红灯亮，表示高压接通。
⑶ 顺时针方向平缓调节调压电位器，输出端即从零开始升压。电压表显示为负载试品上的电压（KV）值，电流表则显示试品上流过的电流与所有泄漏电流之和，电流以微安（uA）为单位。升到所需的电压后，按规定时间记录电流表读数，并检查控制箱及输出电缆有无异常现象及声响。
⑷ 降压，将调压电位器回零后，随后按绿色按钮，切断高压并关闭电源开关。
3、对试品进行泄漏及直流耐压试验
⑴ 在做负载试验前，将高压屏蔽微安表安装到倍压筒上的高压输出端上，并将配套的专用高压线分别接到微安表上和被试品上。
⑵ 检查仪器、放电棒、倍压筒、试品联接线、接地线是否正确，接地线联接是否可靠，检查高压安全距离是否符合要求，方可开始进行试品的高压试验。
⑶ 检查确认仪器等无异常情况后，接通单相交流220V电源开关，此时绿灯亮，表示电源接通。可开始进行试品的直流泄漏和直流耐压试验。
⑷ 按红色按钮，则红灯亮，表示高压接通，待升高压。
⑸ 顺时针方向平缓调节调压电位器,输出端即从零开始升压。升压速度以每秒3-5kV上升试验电压为宜。对于大电容试品升压时则需要缓慢升压，否则可能导致电压过冲,还需监视电流表充电电流不超过直流发生器的最大充电电流。当升到所需的电压或电流后，按规定时间记录电流表及电压表的读数。
⑹ 试验完毕后，降压，将调压电位器回零后，随后按绿色按钮，切断高压并关闭电源开关。
⑺ 试验完毕后，应用放电棒对试品进行多次放电，放电后方可靠近试品和拆线工作 (放电请详细见放电棒使用说明书)。对小电容试品如氧化锌避雷器、磁吹避雷器等缓缓调节调压电位器升压到所需的电压(电流)值，然后从数显表上读出电压(电流)数值。如需对氧化锌避雷器进行75%VDC-1mA的测量时，应先升到电流到1000uA时电压值停止(这时可记录电压、电流值)，然后按下黄色按钮,电压即降到原来的75%,并保持此状态。此时可读取微安表数值及电压值。测量完毕后,调压电位器逆时针回到零位,按下绿色按钮,需再次升压时按红色按钮即可。对大电容试品时，升压应更要缓慢，并需要监视电流表充电电流不超过发生器的最大充电电流，一定要放慢升压速度,避免充电电流过大。试验完毕后，将电压调节电位器逆时针回到零位上，随后按绿色按钮，切断高压。此时注意电压表上的电压降到20kV左右,方可用放电棒进行多次放电，确保安全。
4、在使用过程中发现红灯灭，绿灯亮，直流高压下降，即为有关保护动作。此时应按下列步骤操作:
⑴ 将调压电位器退回零位。
⑵ 关闭电源开关,面板指示灯均不亮。
⑶ 一分钟后,待机内低压电容器充分放电后，才允许再次打开电源开关。重新进行空载试验，并查明情况后，可再次升压试验。
5、注意：做电缆试验时，要安装限流电阻使用。（做其它试验时，不能使用限流电阻），仅限于120KV以上。
六、注意事项
1、为确保人身安全，在此反复提醒用户注意控制箱及倍压筒的良好接地以及停机后的试品及倍压筒放电问题。
2、防止异物进入控制箱，如控制箱有风扇时，应经常检查风扇是否正常运转。
3、当倍压筒绝缘筒脏污时请用干布擦净，不可用酒精，汽油等有机类溶剂擦洗。可用洗涤剂清洗绝缘筒表面，等风干后方可使用，运输或不使用时请放入箱内。
4、换保险管时，请按保险管座旁标定的安培数更换保险管。
5、若高压屏蔽微安表上显示"LOW BAT"时，请更换9V电池，以避免测量误差。
6、未经允许，请勿开启控制箱及倍压筒，否则会影响产品的保修，自行拆卸厂方概不负责。
7、仪器运输时应避免雨水浸蚀,严防碰撞和坠落。
七、故障检查及处理
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现 象
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原 因
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处 理
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1
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电源开关接通后绿灯不亮
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1． 电源线开路
2． 电源保险丝熔断
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更换电源线更换保险丝
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2
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按红色按钮红灯不亮
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调压电位器未回零
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电位器回零
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3
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按红色按钮红灯亮，一升压红灯
灭，绿灯亮
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高压输出端搭地试品短路
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检查输出电缆
检查被试品
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4
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升压过程中红灯灭，绿灯亮
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试品放电或击穿过压或过流保
护动作
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检查被试品重新设置整定值
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若按以上方法还不能排除故障，请与厂家联系。
八、产品成套性
1、控制机箱 1台；
2、倍压筒 1台；
3、电源线 1根；
4、中频输出电缆线 1根；
5、备用保险丝5A 5只；
6、使用说明书 1份；
7、产品检验合格证、保修卡 1份；
8、产品出厂验收试验报告 1份；
9、放电棒 1套；
10、专用接地线 1根；
11、高压连接线 1根
12、铝合金包装箱 1套
九、另配套产品
高压屏蔽数显微安表
四、NKZGF系列直流高压发生器规格及主要技术性能
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规格
技术参数
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40/4
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60/2
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60/5
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120/2
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120/3
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120/5
|
200/2
|
200/3
|
200/5
|
300/2
|
300/5
|
|
额定电压（KV）
|
40
|
60
|
60
|
120
|
120
|
120
|
200
|
200
|
200
|
300
|
300
|
|
额定电流（mA）
|
4
|
2
|
5
|
2
|
3
|
5
|
2
|
3
|
5
|
2
|
5
|
|
额定功率 （W）
|
160
|
120
|
300
|
240
|
360
|
600
|
400
|
600
|
1000
|
600
|
1500
|
|
电压测量精度
|
数显表±（1.0 %读数±0.2KV）
|
|
电流测量精度
|
数显表±（1.0 %读数±2）
|
|
波纹系数
|
≤0.5％
|
|
电压稳定度
|
随机波动，电源电压变化±10%时≤1％
|
|
过载能力
|
空载电压可超出额定电压10％使用十分钟最大充电电流为1.5倍额定电流
|
|
电源
|
单相交流50赫兹220伏±10％
|
|
工作方式
|
间断使用
|
|
一次连续时间最长为30分钟
|
|
工作环境
|
温度：-10～40℃
|
|
相对湿度：室温为25℃时不大于85％（无凝露）
|
|
海拔高度：1500米以下
|
|
带电容负荷能力
|
被试品电容量无限制
|
|
可用1.5倍的额定电流充电
|
|
结构特点
|
环氧玻璃钢电气绝缘倍压筒
|
|
空气绝缘、无泄漏之虑
|
|
操作箱特点
|
高精度0.75UDC--1mA单触按钮（精度≤1.0％）最适合氧化锌避雷器试验
|
|
过压保护采用拨码设置，一目了然
|
|
立卧两用型国际标准机箱,现场更方便
|
注：40KV一体化的设备高压直接用拖地电缆引出。如需其它型号可与厂家直接联系定做。
五、使用说明
安 全 警 告
● 直流高压试验器的实验人员必须是具有“高压试验上岗证”的专业人员
● 使用本仪器请用户必须按《电力安规》168条规定，并在工作电源进入试验器前加装两个明显断开点
● 直流高压在200KV及以上时，尽管试验人员穿绝缘鞋且处在安全距离以外，但由于高压直流离子分布的影响，会使邻近的人体上带有不同的直流电位，试验人员不要互相握手或用手接触接地体等否则会有轻微电击现象，一般不会对人造成伤害。电缆试验必须使用限流电阻。
● 对大电容试品放电时，不能将放电棒立即接触试品，应先将放电棒逐渐接近试品，至一定距离空气间隙开始游离放电有嘶嘶声。当无声音时可用放电棒放电，最后直接接地线放电。
一、简介
NKZGF系列直流高压发生器是按照中国行业标准ZBF 24003-90《便携式直流高压发生器通用技术条件》的要求，研究、制造的便携式直流高压发生器，适用于电力部门、厂矿企业动力部门、科研单位、铁路、化工、发电厂等对氧化锌避雷器、磁吹避雷器、电力电缆、发电机、变压器、开关等设备的直流高压试验。
NKZGF系列直流高压发生器采用中频倍压电路，率先应用最新的PWM中频脉宽调制技术，闭环调整，采用了电压大反馈，使电压稳定度大幅度提高。使用性能卓越的大功率IGBT器件及其驱动技术，并根据电磁兼容性理论，采用特殊屏蔽、隔离和接地等措施。使直流高压发生器具备了高品质、便携式，并能承受额定电压放电而不损坏。
NKZGF系列直流高压发生器仪器主要部件选用美国、德国、日本等国先进技术的元器件，使仪器更可靠、更稳定，倍压筒体积小，容量大，过载能力强，便于现场作业试验。我公司视质量和信誉为生命，不断提高科技水平，研制出优质产品，以满足用户的需要。
二、产品特点
1、同类产品体积更小、重量更轻、更美观、更可靠、操作简便、功能齐全，便于野外使用。
2、采用先进技术、工艺制造，率先应用最新的PWM中频脉宽调制技术、脉冲串逻辑阵列调制采用大功率IGBT器件和电压大反馈，从而使输出高压稳定度更高，波纹系数更小。
3、仪器主要部件均选用美、德、日等国进口先进技术的元器件，经久耐用，不怕连续对地直接短路放电。
4、精度高、测量准确。电压、电流表均为数字显示，电压分辨率为0.1kV，电流分辨率为1uA，控制箱上电压表直接显示加在负载试品上的电压值，使用时无需外加分压器，接线简单。仪器具有高、低压端测量泄漏电流， 高压端采用圆形屏蔽数字表显示，不怕放电冲击，抗干扰性能好，适合现场使用。
5、电压调节稳定度高，全量程平滑调压，输出电压调节采用进口单个多圈电位器，升压过程平稳，调节精度高。
6、负极性输出、零启动、连续可调、有过电压、过电流、回零、接地保护、特有断线保护等各种保护功能。自动保护电路功能强，保护完善可靠，使操作安全，各种技术指标均优于行业标准。
7、增设了高精度75%VDC-1mA的功能，做氧化锌避雷器测量带来极大的方便。轻轻一按无须计算。本仪器控制箱上有75%的电压功能键，在做避雷器试验时，当电流升到1000uA时、就按下0.75UDC--1mA的按钮，这时电压表、电流表所显示的值就是75%的数据，做完后应立即将调压电位器回到零位上，并应立即按绿色按钮，切断高压并关闭电源开关。再做其它的试验。
8、方便的过电压整定设置功能，采用了数字拨盘开关，能将整定电压值直观显示，使你操作更随意，显示数值单位为kV。
9、倍压筒采用美国技术研制生产，中频变压器经有关专家特殊设计、体积小，容量大，过载能力强，便于现场作业试验。
10-1、底部设有三只内藏式支撑脚，增加了倍压筒的稳定性。（适用于200KV）
10-2、控制箱上盖可作为防风底座，可与倍压筒接插，增强倍压筒的稳定性。
ELECTRIC
