Yangzhou City Ficut Electric Co., Ltd. GM-5KV, 10KV, 15KV, 20kV adjustable high-voltage digital megohmmeter test voltage is high, power is large, the measured object often has power frequency leakage or high-voltage interference on the induction power, so in order to Personal safety, the use of the instrument must first be connected to a good safety ground! After the instrument is started under high pressure, please do not use the manual discharge method to check the instrument. After the test is completed, you should wait until the instrument automatically discharges to make the voltmeter return to zero before carrying out the routine safety required manual discharge! Because the short-circuit discharge of a strong electrical pulse wave damage the measured object's insulation life, if the pulse breaks into the meter, it will also damage the integrated circuit within the instrument!
The instrument is designed to solve the test of electrical insulation resistance characteristics of large-scale high-voltage transformers, electrical appliances, remote power cables or buried cables under the strong interference of high-voltage substations and power plants. It can also be used for electrical insulation resistance measurement in a wide range of fields.
GM series adjustable high voltage digital Megohm meter operation method: The instrument should be charged for the first time or before going to the scene to use (the full charge time is 8 hours, the charging indicator light turns from red to green), so as to avoid interruption of power to the site. In addition, the reference resistance of the instrument should be used at any time to check whether the instrument is working properly and accurately.
The instrument operation method is as follows:
1, ready:
Before wiring the meter, first the 'power switch' should be turned off and the 'high voltage control' button should be exited! The object to be tested should be separated from the power grid, and each end of the test must be connected to the earth through an artificial discharge rod, which fully proves the safety before wiring.
In particular, the measured object that is strongly interfered with by the grid leakage sensor at the substation and power plant site should be well received by all the artificial discharge bars connected to the earth in advance, and the wiring personnel should be protected from electric shock when the wiring is completed. Remove the artificial discharge rod at the measuring point.
2, wiring:
Connect the two 'E' terminals of the meter to the ground or zero end of the object under test, as well as the ground.
Connect the 'L' terminal of the meter to the line end under test, such as transformer windings, cable cores.
Terminating the meter 'G' to the circuit under test requires the elimination of the effect of the surface resistance leakage.
3, preselected test power supply voltage:
Select the 'high voltage preselection' rotary switch to the desired test supply voltage. If you need to start from 0V, you need to rotate the 'high-pressure adjustment' knob counterclockwise to the end.
4, switch on the working power:
Turn the meter's 'power switch' on, the indicator light above the switch is on, and the 'kV' voltmeter display should be 0.00kV.
5, test start:
Press the 'high voltage control' button, then the high voltage is output from the L terminal. The 'kV' meter shows the voltage value between the LE and the 'stopwatch' starts timing.
6, test power voltage fine-tuning:
Adjust the 'high voltage' knob to smoothly adjust the voltage to the specified value.
7, resistance range selection:
Select the resistance range switch to the desired range, or step from the MΩ step to the 200GΩ range. If the meter continuously reports an alarm, it indicates that the measured resistance is too low.
8, resistance readings:
Read the resistance value through the MΩ/GΩ meter. The stopwatch is reported 15 seconds, 60 seconds, every 60 seconds after the high pressure output. Easy to record by the operator.
The formula for the absorption ratio and polarization index is:
Absorption ratio = R60S/R15S - resistance reading at 60 seconds 电阻 resistance reading at 15 seconds polarization index = R10min/R1min - resistance reading at 10 minutes 电阻 resistance reading at 1 minute 9. Test power supply voltage exiting:
Exit the 'High Pressure Control' button, then the 'kV' table will slowly return to zero and the digital stopwatch will exit the display.
10. End:
After the 'kV' table is displayed as 0.00kV, it is connected to the earth through the artificial discharge rod of the object to be tested, and after it is proved to be safe, it can be shut down, disconnected, and ended.
The instrument is designed to solve the test of electrical insulation resistance characteristics of large-scale high-voltage transformers, electrical appliances, remote power cables or buried cables under the strong interference of high-voltage substations and power plants. It can also be used for electrical insulation resistance measurement in a wide range of fields.
GM series adjustable high voltage digital Megohm meter operation method: The instrument should be charged for the first time or before going to the scene to use (the full charge time is 8 hours, the charging indicator light turns from red to green), so as to avoid interruption of power to the site. In addition, the reference resistance of the instrument should be used at any time to check whether the instrument is working properly and accurately.
The instrument operation method is as follows:
1, ready:
Before wiring the meter, first the 'power switch' should be turned off and the 'high voltage control' button should be exited! The object to be tested should be separated from the power grid, and each end of the test must be connected to the earth through an artificial discharge rod, which fully proves the safety before wiring.
In particular, the measured object that is strongly interfered with by the grid leakage sensor at the substation and power plant site should be well received by all the artificial discharge bars connected to the earth in advance, and the wiring personnel should be protected from electric shock when the wiring is completed. Remove the artificial discharge rod at the measuring point.
2, wiring:
Connect the two 'E' terminals of the meter to the ground or zero end of the object under test, as well as the ground.
Connect the 'L' terminal of the meter to the line end under test, such as transformer windings, cable cores.
Terminating the meter 'G' to the circuit under test requires the elimination of the effect of the surface resistance leakage.
3, preselected test power supply voltage:
Select the 'high voltage preselection' rotary switch to the desired test supply voltage. If you need to start from 0V, you need to rotate the 'high-pressure adjustment' knob counterclockwise to the end.
4, switch on the working power:
Turn the meter's 'power switch' on, the indicator light above the switch is on, and the 'kV' voltmeter display should be 0.00kV.
5, test start:
Press the 'high voltage control' button, then the high voltage is output from the L terminal. The 'kV' meter shows the voltage value between the LE and the 'stopwatch' starts timing.
6, test power voltage fine-tuning:
Adjust the 'high voltage' knob to smoothly adjust the voltage to the specified value.
7, resistance range selection:
Select the resistance range switch to the desired range, or step from the MΩ step to the 200GΩ range. If the meter continuously reports an alarm, it indicates that the measured resistance is too low.
8, resistance readings:
Read the resistance value through the MΩ/GΩ meter. The stopwatch is reported 15 seconds, 60 seconds, every 60 seconds after the high pressure output. Easy to record by the operator.
The formula for the absorption ratio and polarization index is:
Absorption ratio = R60S/R15S - resistance reading at 60 seconds 电阻 resistance reading at 15 seconds polarization index = R10min/R1min - resistance reading at 10 minutes 电阻 resistance reading at 1 minute 9. Test power supply voltage exiting:
Exit the 'High Pressure Control' button, then the 'kV' table will slowly return to zero and the digital stopwatch will exit the display.
10. End:
After the 'kV' table is displayed as 0.00kV, it is connected to the earth through the artificial discharge rod of the object to be tested, and after it is proved to be safe, it can be shut down, disconnected, and ended.
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