
[In the case of | [In the case of single | |||||
|
|
|
|
|
| input series] |
+ + |
| V | – |
| ||
|
|
|
| |||
|
|
|
|
|
|
|
AR | WR | P(+) |
L1/R | ||
| VR |
|
U
AU WU
VU
Motor
supply
AR | WR | L1/L |
AS | L2/S |
Drive | V |
| |
Drive |
|
AV
M
3~
VR
Power supply
VS |
|
|
AT | WT | L3/T |
VT |
| FM |
W |
L1 |
VV
AW | WW |
VW
Power
L2/N
+V
–
Figure 8-3-1 Diagram for connections of meters
8-4 Insulation Test
As much as possible, do not test the drive with a megger because an insulation test was done at shipping from the factory. If a megger test must be done, test as described below. If the test method is incorrect, there is a pos- sibility of damaging the product. Incorrect use of test specific ations for the dielectric strength test may damage products like megger test. If the dielectric strength test must be conducted, contact your local distributor or near- est GE Fuji’s sales office.
(1)Megger test for the main circuit
1)Test with a 500V dc megger.
2)If the test voltage is connected to the control circuit, remove all connection wires to the control circuit.
3)Connect the main circuit terminals using common wires as shown in Figure
4)Execute a megger test only between the common wire connected to the main circuit and the ground (terminal G).
5)If the megger indicates 5MΩ or more, it is normal.
(This is the value measured with a drive only.)
G |
|
| Drive |
|
|
|
|
|
|
| |
G |
|
|
|
|
|
L1/R | L2/S | L3/T | P1 P(+) P(+) | V | W |
(L1/L) | (None) | (L2/N) |
Megger
Figure 8-4-1 Megger Test
Symbols in parentheses ( ) are for the single
230V series.