Mazak VTC-160A, Maintenance Manual, Page: 77 / 96

6-3
6-2-2 External Power Source Requirements
WARNING
l To connect the power supply cable to the machine, grounding of class 3* or higher is
required.
* Class 3 grounding: Grounding resistance is 100
Ω
or lower.
l
Use cable conductors that meet the following requirements
(200 VAC power source)
Primary power cable: 38 mm
2
(0.6 in
2
.) or larger
Grounding cable: 22 mm
2
(0.3 in
2
.) or larger
l When an earth leakage breaker is used, it must have a trip current rating of 200 mA.
Since the machine has inverter driven equipment, an earth leakage breaker with a 30 mA
trip current rating must not be used since it could malfunction.
1. Power source voltage
Voltage: 200/220 VAC, 3 phases
Permissible voltage fluctuation: ±10%
2. Frequency
50/60 Hz ±1%
3. Total power requirements
When installing the machine, the machine may malfunction if the power capacity is insufficient and
the service life of the electric parts will be shortened.
In some cases, this may incur serious problems from the standpoint of safety. Therefore, always
pay sufficient attention to the power facility so that sufficient power can be supplied to the machine.
Table 6-1 Power source
Frequency 50/60 H ｚ ± 1%
Voltage 3 phases (3 lines) 200/220 V
Permissible voltage
fluctuation
±
10%
Grand total of power
requirement See the separate table.
* Install the transformer having the capacity (KVA) larger than
the grand total of the continuous rating.
Power source
connection cable See the separate table.
* Provide the earth (metallic conduit wiring) having grounding
resistance of 100 Ω or less.
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