With the rapid development of the electric power industry, the parameters of the unit and the voltage level of the system are gradually improved. The insulation strength of electrical equipment and the limit level of system overvoltage have an increasingly prominent impact on the safe and economical operation of the system. According to statistics, various faults in the high-voltage power grid are mostly caused by the damage of the insulation of high-voltage electrical equipment. Therefore, understanding the insulation characteristics of the equipment, mastering the insulation conditions, and continuously improving the insulation level of electrical equipment are the fundamental guarantees for the safe and economical operation of the power system. High-voltage test equipment is used to detect various high-voltage lines and effectively improve the safety index of the power system.

The following is an introduction to the use of the Demics high-voltage switch dynamic characteristics tester

Before testing, please set the various operating states of the DEMIKS high-voltage switch dynamic characteristics tester.

 Main test setting method

 Speed definition:

The high-voltage switch dynamic characteristics tester has solidified 10 speed definitions (Note: These 10 definitions can be redefined and solidified by PC as needed). Select the corresponding definition according to the switch model. If the corresponding definition cannot be found, generally take "10ms before closing and after opening" to measure the "time-travel characteristic curve" and then perform corresponding analysis on the curve to obtain the corresponding speed value.

 Sensor installation: Select the phase according to the installation position of the speed sensor. If it is a three-phase linkage mechanism, generally select the "A" phase.

 Test duration: refers to the length of time the internal power supply outputs the operating voltage.

 250ms: For single-open and single-close tests of general switches, select 250ms duration;

500ms: For general switch "close-open" or "open-close" operations, select 500ms duration;

1000ms: The closing time of old-style generator export switches such as SN4-10G and SN-20G is generally greater than 500ms. When performing single-close and single-open tests of such switches, select 1000ms duration;

2000ms: When the switch performs "open-close-open" operation, select 2000ms duration;

4000ms: When the switch performs "close-open-close-open" operation, select 4000ms duration; When performing internal operating voltage calibration of the instrument, select 4000ms duration

Trigger mode:

Internal trigger: Use the internal DC power supply of the instrument to perform opening and closing operations;

External trigger: The internal DC power supply of the high-voltage switch dynamic characteristics tester does not work, and the on-site power supply (AC or DC) is used to operate the switch. When the instrument is closing (opening) the switch, the "external trigger" wiring of the instrument is directly connected to the closing (opening) coil. When the switch is actuated, the instrument takes the voltage signal from the coil as the timing starting point.

Sensor: There are two options, rotation and linear sensors, which can be set accordingly according to the sensor used.

Speed test: If the site is not a stroke test, turning this off can shorten the test time and reduce the test intensity.

Stroke test: When using a linear sensor to measure speed, turn this on to measure the switch stroke value; when using a rotary sensor to measure speed, turn this off.

Switch stroke: When using a rotary sensor to measure speed, enter the total stroke value of the switch. When using a linear sensor to measure speed and stroke, enter the marked stroke value of the sensor.

Test voltage: Set the operating voltage of the switch according to on-site needs.

Tip: After completing all options, move the cursor to the OK button at the bottom of the screen, and then press the OK button to complete all settings.

Internal power supply voltage verification: Use a multimeter to measure the closing or opening end of the "control power output", set the test time to 2000ms or 4000ms, and perform a single closing or single opening operation to measure the output power voltage value.

 The main products of Shanghai DEMIKS Power Technology Co., Ltd. include: "Series resonance test equipment, partial discharge test system, high voltage insulation withstand voltage, transformer test, circuit breaker test, relay protection, secondary circuit test, cableline test, lightning arrester Insulator tester, SF6 test, oil test, DC system battery test, reactive power compensation  Generator detection, grounding Insulation resistance test, power metering test, etc." More than 200 products in 20 categories".

Choose DEMIKS for power safety! Contact email contact@demikspower.com