GE Fuji Electric MICRO-SAVER AF-300, Руководство для стартапов

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7-4 7-5
7.4 Insulation Test
Because an insulation test is performed in the factory before shipment, avoid a Megger test.
If a Megger test is unavoidable, follow the procedure below. Caution: an incorrect test procedure will damage the
drive.
A dielectric strength test will also damage the drive if the wrong test procedure is used. If a dielectric strength test is
necessary, contact the shop where you bought the product, or GE Fuji.
(1) Megger test of main circuit
1) Use a 500 Vdc Megger, and be sure to shut off the main power supply during measurement.
2) If the test voltage leaks to the control circuit due to the wiring, disconnect all the control wiring.
3) Connect the main circuit terminals using a common cable as shown in Figure 7.2.
4) The Megger test must be limited to across the common line of the main circuit and the ground terminal ( G).
5) 5 M
Ω
or a larger value displayed at the Megger indicates a correct state. (The value is for a discrete drive.)
Figure 7.2 Megger Test
(2) Dielectric strength test of control circuit
Do not perform a Megger test or dielectric strength test for the control circuit. Prepare a high resistance range tester
for the control circuit.
1) Disconnect all the external wiring from the control circuit terminals.
2) Perform a continuity test to the ground. 1 M
Ω
or a larger measurement indicates a correct state.
(3) Dielectric strength test of main circuit and sequence control circuit
Disconnect all the drive terminals so that the test voltage is not applied.
7.5 List of Periodical Replacement Parts
Each part of the product has its own service life that will vary according to the environmental and operating condi-
tions. It is recommended that the following parts be replaced as specified below.
When the replacement is necessary, contact your dealer where you purchased the product, or GE Fuji.
Table 7.4 Replacement Parts
Part name Standard replacement intervals
Cooling fan 5 years
Intermediate dc circuit capacitor 5 years
Electrolytic capacitor on the printed circuit board 7 years
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