N7201A617E00_0317 - 第506页

NPM-W 2 EJM7DE-MB-14M-00 Main power connec- tion Adjusting v olta ges of the primar y po wer supply and the mac hine 14-4-3 -1 Maintenance 14-4-3 1 Change the voltage of the primary power supply (The primary power supply…

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NPM-W2 EJM7DE-MB-14M-00
Cable
clamp A
14-4-2-2
3
Pass the cable through cable clamps A and B, in that order
4
Insert the special driver
Cable insertion slot
Special driver
Cable
clamp B
●Recommended cable external dimensions:
13.5 to 18mm
●If you have trouble passing the cable through
Cable clamp A, loosen the clamp by turning it
counterclockwise.
●If you have trouble passing the cable through
Cable clamp B, pass the cable after removing the
mounting bolt and then bolt it again.
After passing the cable through Cable clamp A,
secure it by turning the clamp clockwise.
Pull on the cable with a force of 100 N and
ensure that the cable is firmly-secured.
7
Check the following conditions before
turning on the power
Ordinary use
power source
3-phase AC 200/220 ±10 V
380/400/420/480 ±20 V
Frequency
50/60 Hz ±5 %
Rating capacity
2.8 kVA
The primary power should be supplied from power-supply
facilities controlled inside your plant, rather than establishing
a direct connection with the public low-voltage power
distribution system (commercial power).
Recommended
cable external
dimensions
1
2
●Insert the special driver deep enough to
open the fixing bracket inside the cable
insertion slot.
●Make sure that the PE wire on the plant
side is connected to ground.
Installation
NPM-W2 EJM7DE-MB-14M-00
Main
power
connec-
tion
Adjusting voltages of the
primary power supply and
the machine
14-4-3-1
Maintenance
14-4-3
1
Change the voltage of the primary power
supply
(The primary power supply voltage of the transformer can
be changed to any of the following voltages)
●Adjust it to the voltage of power supply.
Tool used: Allen wrench (4 mm), special driver (provided)
●Before using 290 V AC or higher (any tap equal to or
higher than 380 V AC), ensure that the voltage between
a ground and each phase is 290 V AC or lower and that
star connection is used on the feeding side, with the N
(neutral) terminal connected to the ground.
Adjust the difference in voltage between the primary power supply and the machine, if any.
Attach the cover, and relabel the numerical section of the supply voltage
label
6
●The label indicates the power
supply voltage supplied to the
machine.
When changing the power supply
voltage, purchase a new label and
relabel it.
In that case, align ▼ with the
numeric value on the supply voltage
label that corresponds to the power
supply voltage after the change.
1. 480 V
2. 420 V
3. 400 V
4. 380 V
5. 220 V
6. 200 V
5
Connect U, V, and W to the same voltage taps
(Ex. for AC400 V to 200 V)
●Use the attached special driver to
connect each cable.
Then, insert the ferrules fully.
■Wiring diagrams of transformer
power tap (abstract)
4
2
Turn OFF the
power and lock
the machine
OFF
Change to
Transformer
Numerical section of the
supply voltage label
Front side
Transformer power tap
Front side
NPM-W2 EJM7DE-MB-14M-00
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
cover
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
●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 bolts
Front side
7
Attach the
cover
●7 bolts
Front side