1、CONTENTI. Applicable Range.1II. Technical Parameters .1III. Operation Principle2IV. Appearance .2V. Operation Procedures .3VI. Explanation.6VII. Troubleshooting of Faults7VIII.Instrument List.7IX. After-sales Service and Commitments .81ZGF-60/2 High-voltage DC GeneratorI. Applicable RangeZGF high-vo
2、ltage DC generator is a high-voltage DC power supply equipment of multiple uses with high stability and reliability. With the zero voltage closing protection, over-voltage protection and over-current protections in place, the instrument and test piece can be protected from damage. This instrument al
3、so has the characteristics of small size, light weight, convenient to carry and use together with its continuously adjustable and reliable features, it is applicable for: High-voltage DC tests on site by power supply authorities, such as DC voltage withstanding test and leak test of electric power c
4、ables, conduction current and 1mA reference voltage test for magnetic blow-out arrestor and Zinc-oxide arrestor. It can be used as power supply for laser and used for static coating, static flocking and others. It can be used in other occasions required for high-voltage DC. II. Technical Parameters
5、1. Output voltage: 60kV2. Output current: 2mA3. Output power: 120W4. Pressure chamber：90500 （mm）5. Operation box: 300245115（mm）6. Total weight: 8kg7. Ripple coefficient: 0.5%8. Voltage measurement error: 3%（full scale ） 1 character9. Current measurement error: 3%（full scale） 1 character10. Operation
6、 power supply：AC220V5%，50Hz11. Environment temperature: 040 ，relative humidity: no greater than 85% at 225, without dew 12. Altitude height: Below 1500mIII. Operation PrincipleIV. AppearanceFigure1. Diagram of Operation Box Panel1. Current meter: Digit display of high-voltage DC output current value
7、 (Including current of test piece and current lead corona)2. Voltage meter: Digit display of high-voltage DC output voltage3. Output switch button: Switch in clockwise direction can increase the output value and switch in counter clockwise direction and decrease the output value. AC220 InputControl
8、of LoopSampling& MeasurementHigh voltage outputStep-up TransformerBridge InverterRectified FilterVoltage DisplayCurrent DisplayOver-voltage ProtectionOver-current ProtectionHigh frequency 34. Circuit-breaker breaking button: In green, the button is used to break the high-voltage loop. In breaking, r
9、ed light goes out and green light lights up. 5. Circuit-breaker closing button: In red, the button is used to connect the high-voltage loop. In closing, red light lights up and green light goes out.6. Red light: Indication light for high voltage and it lights up when the high voltage loop is connect
10、ed. 7. Green light: Indication light for high voltage breaking and power supply and it goes out when the high voltage loop is connected.8. Over-current adjuster: It is used to adjust the 0.5l time of nominal current of the adjusting range of the over-current protection value.9. Over-voltage adjuster
11、: It is used to adjust the 0.5l time of nominal voltage of the adjusting range of the over-voltage protection value.10. Power supply switch: Disconnect or connect with AC220V power supply11. Power supply outlet: Input 220V,50Hz power 12. Output port: Output high-frequency adjustable power to pressur
12、e chamber.13. Grounding port: This port shall be connected with pressure chamber and test piece grounding port first before connecting to the ground grid.Figure 2 Diagram of Pressure ChamberV. Operation ProceduresThis unit must be operated by technicians special in high-pressure discipline!1. First
13、check the operation box and pressure chamber are clean and in good Equalizing CoverInsulation ShellInput Port of VoltageGrounding PortBase4conditions and no broken or short circuit on AC220V power supply cable and connecting cables.2. Refer to Diagram 3 to connect the cables for operation box and pr
14、essure chamber leaving sufficient space for safety concern. Then connect it to arrestor of the test piece or other loads and connect the grounding wire of discharge rods.Must remember grounding of the pressure chamber, operation box, the test piece and discharge rod!Figure 3 Wiring Diagram of Onsite
15、 DC Generator3. Proceed following no-load test after checking wiring of all circuits with no problem. 4. Turn the power switch to the position of “Break”, turn the high-voltage output switch button in counter clockwise direction to end position then close the power switch. After reading displays on
16、meter, push the circuit-breaker closing button, if a “pa” sound gives out with some slight vibration sound, it means the relay is closed. Adjust the output button in clockwise direction to required voltage value. In case when over-current and over-voltage protection functions are needed, please turn
17、 the switch buttons for over-current and over-voltage protection to corresponding positions, Over-voltage protection function: While user is making a test, to protect the Discharge RodOperation BoxGrounding PortDCPressure Chamber of GeneratorWater BlockArrestor or Other Loads5equipment from damage,
18、especially from damage by over voltage in case of load voltage is higher than nominal output voltage of the equipment, over-voltage protection is adopted to prevent this happening. First, connect wires as required, disconnect the test piece, rise up voltage to required protection voltage value in no
19、-load condition, then adjust the button for over-voltage protection slowly until protection of the equipment is activated with the over-voltage indication lights up, then turn the output switch button to zero, turn off power supply, discharge power, then connect the test piece for voltage test. Over
20、-current protection function: While user is making a test, to protect the equipment from damage, the over-current protection is activated in case of current of load is higher then nominal output current, there will be no high voltage output and over-current indication lights up. The switches for hig
21、h voltage and power supply shall be turned off and the test shall only be resumed after finding out the causes. Usage of 0.75U1mA key: Wile making a zinc-oxide arrestor test, when the high-voltage current reaches to 1mA, the voltage meter on the right side reads U1mA, press the 0.75U1mA key, the vol
22、tage meter on the left side will memorize a value of 0.75U1mA, then turn the voltage switch button in counter clockwise direction till voltage values of the two meters are equal. By this time the value appeared on the millimeter turns to be the leak current under 0.75U1mA voltage. 5. After no-load t
23、est is passed, DC voltage withstanding and leak current tests of the test piece can be made per normal high-voltage test procedures. In case it needs to pressurize again after protection are activated, power must be turned off before repeating above procedures again. 6. While making capacitive load
24、test, note that the pressurizing speed shall not be too fast in the process of capacitance power charging in case the output voltage exceeds the nominal value and damage the test piece. 7. After test, high-voltage output switch button must be turned to zero position, disconnect the power, and only r
25、emove the wirings for test after the pressure level 6is lowered and residual charge is released from the discharge rod. VI. Explanation1. In case of the output DC current value needs to be tested in high accuracy, a MSA1 automatic protective millimeter needs to be connected externally to the high-vo
26、ltage port on the instrument, which needs to be purchased separately. 2. In case of the output DC current value needs to be tested in high accuracy, a high-voltage DC voltage divider needs to be connected in parallel to the high-voltage port on the instrument, which needs to be purchased separately.
27、3. In case of high-power DC voltage generator is needed such as of 5mA, 10mA and special voltage ratings, our company can manufacture per actual order by customers. 7VII. Troubleshooting of FaultsS/N Faults Cause Measures1 Green light and fan dont work after power switch is connected1. Power cable i
28、s broken2. Fuse is brokenExamine power cable and replace fuse, 3A2Green light is on but cannot connect the high-voltage loop(Light for over-current, over-voltage are out)Value of zero adjuster is too highAdjust it to a lower value3Green light is on but cannot connect the high-voltage loop(Light for
29、over-current, over-voltage are on)Normal phenomenon Adjust the adjusters for over-voltage or over-current in clockwise direction4 Can close the breaker to connect the high pressure but could not be heldPower tube of switch got shocked Replace the tube5Displayed value on voltage meter exceeds standar
30、d Adjust voltage precision adjuster 6Displayed value on current meter exceeds standard Adjust current precision adjusterVIII. Instrument List1. 1. High-voltage DC generator body (Including pressure chamber and operation box) 1 Set2. 2. 220V power cable 1 pcs3. 3. High-frequency connecting cable 1 pc
31、s4. 4. Grounding wire 2 pcs5. 5. Discharge rod 1 pcs6. 6. Protective resistance 1 pcs7. Instruction and Certificate of Conformity 1 for each copy8IX. After-sales Service and Commitments1. Our company conducts manufacture and service in strict accordance with ISO09001 QA system requirements and provi
32、de free repair within 3 years and lifelong maintenance for products provided by us. 2. Our company will organize training on principle knowledge and test procedures. 3. When the equipment is used for first time, we will send related technical personnel on site to provide necessary guidance and train
33、ing for free and will be responsible for the commissioning work and performance acceptance. 4. In case of problem occurs concerning product, our engineering technicians will arrive to the site in 24 hours to solve the problem. Attachment: Requirement for metal-oxide arrestor preventive test items ar
34、e as following as required by Preventive Test Code for Electric Power Equipment, DL/T5961996:(1) Insulation resistance. (2) DC 1mA voltage（Leak current under U1mA and 0.75UlmA）(3) DC leak current under operation voltage: Measure full current, resistive current or power loss under operation voltage,
35、compare the measured values with initial values, strengthen monitor when there appears some obvious change and disconnect power connect for examination when the resistive current is increased by 1 time. (4) Operation reference voltage under operation reference current.(5) Insulation resistance on the base. (6) Check the operation status of the counter.
