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VACON® 1000
Operating Guide
-
If the input voltage and output voltage rating are the same, conduct the dielectric withstand test covering both input
and output.
9.9.1 Testing Input and Output Together
Procedure
1.
Connect the shorted input and output terminals to ground.
2.
Measure the insulation resistance between the input terminals and ground with a 1000 V megohmmeter. The resistance
must be >100 MΩ.
3.
Apply power frequency high voltage at the input terminal referred to ground for 5 s. No breakdown and flashover are re-
quired.
4.
Measure the insulation resistance again. The resistance must be >100 MΩ, and the variation must be less than 30% com-
pared with the first measurement result.
5.
After the test, restore the drive to its original state. Restore the wiring connections and remove the shorting.
9.9.2 Testing Input and Output Separately
Procedure
1.
Connect the shorted input and output terminals to ground.
2.
Measure the insulation resistance between the input terminals and ground with a 1000 V megohmmeter. The resistance
must be >100 MΩ.
3.
Apply power frequency high voltage (see table) at the input terminal referred to ground for 60 s. No breakdown and flash-
over are required.
System voltage (kV)
2.3/2.4
3
3.3
4/4.16/4.2
4.8/5
6
6.3
6.6
6.9/7.2
8.4
10
11
11.4
12
12.47
13.2
13.8
4.
Measure the insulation resistance again. The resistance must be >100 MΩ, and the variation must be less than 30% com-
pared with the first measurement result.
5.
Disconnect the short circuit wire between the output terminal to ground, and short the input terminal to ground.
6.
Repeat the measurements in steps 2–4 for the output terminals.
92 | Danfoss A/S © 2021.06
Dielectric withstand voltage (kV)
8
9
10
12
14
17
18
19
20
22
25
27
28
29
30
32
34
Maintenance
AQ363633621020en-000201 / 172F3117
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