Wiring Diagram; Insulation Tests - Hitachi G 18SS Service Manual

• Wiring diagram

On completion of disassembly and repair, measure the insulation resistance, and conduct the dielectric
strength test.
Insulation resistance: After the switch is turned on, more than 10 MΩ by 500 V DC megohm meter between
live parts and accessible metal parts.
Dielectric strength: After the switch is turned on, there must be no trouble when the voltage indicated below
is provided between live parts and accessible metal parts.
Less than 150 V of the rated voltage: 3,000 V x 3 sec.
More than 150 V of the rated voltage: 4,400 V x 3 sec.
After no-load operation for 30 minutes, the no-load current value should be as follows.
Voltage (V)
Current (A) max.
Wiring diagram

Insulation tests

No-load current value
110 120
6.3 5.2
127 220
4.8 3.0
-11-
230 240
3.2 3.4