Wiring Of Variable Speed Control Switch; Insulation Tests; No-Load Current Values - Hitachi DH 30PC2 Technical Data And Service Manual

9-6. Wiring of Variable Speed Control Switch

Insert each cord into the terminal 1 and terminal 2 of the speed control switch as shown in Fig. 31 and tighten
the screw [tightening torque: 0.6
from the stator ass'y into the terminals M1 and M2. Insert each lead wire (black) coming from the noise
suppressor into the terminals C1 and C2. After insertion, pull each lead wire slightly to check the lead wires do
not come off. To disconnect the lead wires, insert a small flatblade screwdriver into the slots near the terminals
and pull out the lead wires.

9-7. Insulation Tests

On completion of reassembly after repair, measure the insulation resistance and dielectric strength.
Insulation resistance: 7 M Ω or more with DC 500 V megohm tester
: AC 4,000 V/1 minute, with no abnormalities ... 230 V (and 110 V for U.K. products)
Dielectric strength
AC 2,500 V/1 minute, with no abnormalities ... 110 V (except U.K. products)

9-8. No-load Current Values

After no-load operation for 30 minutes, the no-load current value should be as follows:
110
Voltage (V)
4.2
Current (A) Max.
0.2 N m (6 2 kg cm, 5.2
• •
Fig. 31
120 220
4.2 2.5
--- 30 ---
1.7 in-lbs.)]. Insert each lead wire (black) coming
230 240
2.5 2.4