Ulvac VD30C - Page 10

YK15-0009-DI-002-04
vi
Countermeasure to the earthquake
WARNING
There is a risk that the Pump
lays down or slides and breaks peripheral
units if it was not correctly fixed. Be sure to give allowances to the
vacuum piping and electric cables so that they absorber vibrations to
prevent them from breaking and/or dismantling.
Inlet / outlet port piping <Mounting>
WARNING
Check and ensure that any of hazardous energy is blocked before
starting the operation.
Power Supply wiring <Mounting>
WARNING
① Check and ensure that any of hazardous energy is
blocked before
starting the operation.
Entitled staff should conduct the wiring operation.
Erroneous wiring work might cause a fire.
②
Conduct the wiring operation correctly in compliance with laws and
rules concerning the safety (e.g. Fire Defense Law, Electric Equipment
Technology standard, Internal line cord) in the country and region you
use this product.
③ Ensure to have a correct grounding.
You have a risk of getting electrical shock in case of failure or electric
leakage.
④ You are recommended further to install a dedicated earth leakage
breaker.
⑤ It is imperative to put the Overload protection device.
Otherwise it would cause the motor burn out and/or fire.
⑥
Wire size, please determined by considering the voltage drop of the
wire.
Typically, the voltage drop, please to be within 2% of the rated voltage
of the motor.
Voltage drop calculation：
√3 × wire resistance (Ω / km)×Wiring length (m) × motor rated current (A) × 10
-
3
※ motor rated current, refer to "Table 4".