Maintenance And Inspection; Megger Test; Periodic Parts Replacement; Inspection Items - GE Fuji Electric AF-300ES Instructions Manual

Section 7: Maintenance and Inspection
So that the AF-300E$ drive may give long periods of
trouble-free operation and to prevent potential problems
from occuring, the following items should be periodically
inspected.
CAUTION: Do not conduct any inspections until after
disconnecting the power supply and after the "CRG" light
on the drive has gone out.

MEGGER TEST

1. Disconnect all drive terminals and never apply test
voltage to the drive when conducting an external circuit
megger test.
2. Perform the test only on the main circuit as shown in
Figure 7-1 when conducting a megger test on the drive
itself.
— Do not conduct a megger test on the control
circuits.
— Short L1, L2, L3, U, V, W, P, N, DB, and P, then
megger to ground.
3. Use a high resistance range type tester to conduct a
continuity test on the control circuits and not a megger
or a buzzer.
POWER
MEGGER
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
MEGGER TEST OUTLINE
•
P1 P(+)
•
L1
}
IF SINGLE PHASE
•
L2
•
L3
+
+
–
•
–
GROUND
Figure 7-1. MAIN CIRCUIT MEGGER TEST CONNECTIONS

PERIODIC PARTS REPLACEMENT

The life of the drive will vary according to the installation
environment and the amount of running time. However, if
continuous operation is within the allowable limits, the life of
the dc Link capacitor is approximately five years and the life
of the cooling fan is approximately three years. It is recom-
mended that these parts be replaced before failure occurs.

INSPECTION ITEMS

Refer to the Inspection Items Chart in this section for
inspection points and corrective action.
•
DB
•
U
•
V
•
W
E (G)
7-1
Motor
IM