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(2) When using a rocker to test the insulation of high-voltage equipment, it shall be performed by two persons.
(3) Before the measurement, the power supply of the circuit under test or the electrical equipment must be completely disconnected. That is, the insulation resistance must not be measured with live power. And to find out if no one on the line or electrical equipment can do it.
(4) The table line used for the rocking table must be insulated, and it is not suitable to use double stranded insulated wire. The end of the table wire should be insulated; the “L†terminal of the rocking watch should be connected to the tested device. Phase, ground terminal "E" should be connected to the device shell and equipment of the measured phase, shielding terminal "G" should be connected to the protection ring or cable insulation cover, in order to reduce the insulation surface leakage current measurement error.
(5) Before the measurement, it is necessary to conduct open circuit check of the shake table. When the “L†side and “E†side of the shake table are shaken and shaken with no load, the pointer should point to “∞â€; when the “L†side of the shake table is shorted with the “E†side, the pointer of the shake table should point to “0â€. ". Description The rocker function is good and can be used.
(6) The test line or electrical equipment must be discharged to earth before testing. When testing the line, it must be done before the other party can allow it.
(7) When measuring, shake the shaker handle to a uniform speed of 120r/min; after keeping the stable rotation speed for 1min, take a reading so as to avoid the influence of the absorbed current.
(8) Both hands must not touch two wires at the same time during the test.
(9) The test should be completed before the line is removed, and then stop shaking the shake table. In order to prevent the electric equipment from being charged against the rocking table, the shake table is damaged.
(10) When lightning, do not test the line insulation.
On Insulation Resistance Measurement - BY2671 Megohmmeter
Shaking table, also known as BY2671 megohmmeter, its purpose is to test the insulation status of the line or electrical equipment. The methods of use and precautions are as follows: (1) First, use a megger that is compatible with the voltage level of the device under test. For 500V or below lines or electrical equipment, use a 500V or 1000V megger. For lines or electrical equipment above 500V, use a 1000V or 2500V rocker.