N7201A653E - 第430页

NPM- TT2 EJM1EE-MB-14 M-02 Connection of air sour ce and po wer suppl y Maintenance 14-5 14-5 -1 Tool used: Phillips screwdriver (No. 2), Allen wrench (3 mm) 3 Supply air ● Use an air dryer and always supply clean air. ●…

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NPM-TT2 EJM1EE-MB-14M-02
14-4-3-2
Change the machine voltage.
e.g., Changing from 400 V AC to
200 V AC
3
Check the
plant supply
voltage
Remove the front
cover of the
machine
4
Easy ways to check power supply grounding
(tester confirmation)
■If 5 wires of L1, L2, L3, N and PE are being drawn out
(= star connection) → Measure the voltage between N and
PE
(*1) The neutral wire (N) is not used for the machine. Leave
the cable unconnected to the machine and insulate its
end to keep it from coming in contact with a terminal and
others.
■If 4 wires of L1, L2, L3 and PE are being drawn out, it
can be either star connection or delta connection.
(Usually one phase is grounded on delta connection)
Measure and compare the phase to phase voltage (V
0
)
and the phase to PE voltage (V).
Example 1:
Delta connection grounded
Example 2:
Star connection not grounded
●Five bolts
●If the neutral wire is grounded
The value is stable in the
approximate range of 0 to a
few volts.
Connectable at 290 V AC or
higher
●If the neutral wire is not grounded
The value is unstable
(indicates several tens of
volts)
Not connectable at 290 V AC
or higher
●If V = V
0
and V of single phase is 0 V
One phase is grounded on
delta connection
Not connectable at 290 V AC or higher
●If stable at " V
0
/ Square root of 3."
The neutral wire is grounded
on star connection
Connectable at 290 V AC or higher
●If the value is not stable
No ground contact
(Unknown connection type )
Not connectable at 290 V AC or higher
e.g.) Grounded star connection
Installation
7
●Five bolts
Attach the front
cover of the
machine
NPM-TT2 EJM1EE-MB-14M-02
Connection of air source
and power supply
Maintenance
14-5
14-5-1
Tool used: Phillips screwdriver (No. 2), Allen wrench (3 mm)
3
Supply air
●Use an air dryer and always supply clean air.
●Air pressure: 0.5 to 0.8 MPa
(The size of the inlet for connecting the hose is 3/8)
●After supplying air, adjust the air pressure to 0.500 to
0.505 MPa with the regulator (→P.4-1
-1)
●Air supply rate: 200 L/min (A.N.R.)
2
Connect the compressed air piping to the
area A in the figure below
Connecting air source
Compressed air piping
(Primary air supply side)
To each
device
A
Filter (inside)
1
Rear side
●Bolts (3 pcs)
Regulator
Detach the cover
on the right rear
side
NPM-TT2 EJM1EE-MB-14M-02
1
14-5-2
Checking the power connection
3
Check the
vacuum state
●The system is designed
to check the phase of
the vacuum-pump motor
automatically as the
power is turned on.
●If an error message is
displayed, confirm the
error information and
check if each phase of
the primary power
source is connected.
Remove the front
right side cover
An incorrect main power connection may reverse and damage the vacuum pump. Check to see if it is
correctly connected.
Connect the power supply and the air source to the machine at
the end of installation after checking for the voltage and
connections
(Risk of electric shock)
WARNING
Cover
●Four bolts
Front side
L1 L2 L3 PE
2
Make sure that voltage on the following three
parts is the same as shown on the supply
voltage label (→P.13-4-3).
L1 L2 L3 PE
L1 L2 L3 PE
Main power
terminals
Checking for voltage
between L1 and L2
Main
power
terminals
Checking for voltage
between L2 and L3
Checking for voltage
between L1 and L3
Main
power
terminals
Installation