Insulation Tests; No-Load Current Value - Hitachi CJ 110V Technical Data And Service Manual

3 4
Cord
Switch
1 2

10-4. Insulation Tests

On completion of disassembly and repair, measure the insulation resistance and conduct insulation tests
(dielectric strength test).
Insulation resistance: 7MΩ or more with 500 VDC Megohm Tester.
Dielectric strength:
AC 4000 V/1 minute, with no abnormalities
AC 2500 V/1 minute, with no abnormalities
CAUTION
• Ensure without fail that the insulation resistance measurement and
dielectric strength test are conducted between the plug blade and some
portion of the external metal frame such as the gear cover with main
switch turned ON. Never carry out these tests between the two blades of
the plug. This could cause burning out of the control element in the
switch.

10-5. No-Load Current Value

After no-load operation for 30 minutes, the no-load current value should be as specified below at a
frequency of 50/60 Hz.
Noise suppressor Controller circuit
Fig. 21 With noise suppressor
Voltage (V)
Current (A) Max.
--- 19 ---
Wiring block (C)
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
110 115 230
2.7 2.6 1.3
Armature
Stator
110 V, 230 V
115 V