Ulvac GR60, Инструкция по эксплуатации

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Instructions Manual － Multiple Roots Type Dry Pump GR60/90/180
YK09-0023-DI-003-02
20
3.7 Electric Connection
IMPORTANT
(1) The motor electric connection shall be made in reference to the
figure below. After the connection is established, re-check that all
screws in the motor terminal are tightened.
(2) The motor rotates clockwise when viewed from the motor
(counterclockwise when viewed from the load). In it rotates in the
reverse direction, re-check the electric connections. It is a
three-phase induction motor and therefore if the two of the input
lines are in the reversed phase, it rotates in the reverse direction.
(3) Be sure to attach an overload protective device. If not, it may result
in a motor burnout or fire.
(4) Ensure to have a correct grounding.
You have a risk of getting electrical shock in case of failure or
electric leakage.
You are recommended further to install a dedicated earth leakage
breaker.
(5) Minimize the length of the ground wire
(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 "2.3 Specifications".
IE3 motor is used for this pump.
Striking current tends to be high because efficiency of IE3 motor is
higher than conventional motor. Because of this consequence, there
could be momentary operation by striking current of the motor in the
case of current set rating of MCCB (Molded Case Circuit Breaker),
ELCB (Earth Leakage Circuit Breaker) and THR (Thermal Relay).
It is required to readjust setting of MCCB, ELCB and THR.
Install and operate this product according to the local and national safety
laws and regulations (such as fire laws and electric wiring code).
WARNING
WARNING