Three Phase Motor Connection - Varian TriScroll 300 Série Manuel D'installation Et D'opération

Three Phase Motor Connection

The pump can be configured for low voltage, 200 VAC to 230 VAC, or for high voltage, 380 VAC to 415 VAC and
460 VAC. As supplied from the factory, the pump is configured for low voltage. Figure 5 shows the electrical connections
for three phase motor.
RED (7)
BRN (4)
VPI Valve
Optional
1. Verify the electrical supply voltage.
2. Remove the three screws (item 12 in Figure 3 on
page 35) that are holding the motor electrical cover
(item 13 in Figure 3).
3. Refer to Figure 5 to connect the motor to match your
supply voltage.
Two options are available to strain relieve the
electrical supply cable.
❑
The cable can be mechanically held under
the electrical cover in the groove provided.
The groove is sized for a 14 gage cable.
❑
A 1/2-14 NPSM hole is also provided next to
the motor cover.
TriScroll 300 Series Vacuum Pump
ORG (5)
YEL (6)
WHI (8)
BLU (9)
F
E
5 6
D
4
L1
L2
L3
High Voltage
Figure 5 Three Phase Motor Electrical Connections
VPI Valve
ORG (5)
Optional
E
5 6
D
L1 4
VPI Valve
Optional
L2
BRN (4)
L3
Low Voltage
4. Wire L1, L2 and L3 per Figure 5 using right angle flag
connectors or ring connectors.
Ensure that no exposed wiring is close to the
electrical cover or to other terminals on the board.
5. Secure the ground wire under the ground screw using
a ring connector.
6. Install the motor electrical cover and secure it with
three (3) screws removed in step 2.
7. Momentarily switch on the pump to verify proper
rotation.
With the inlet uncovered, a strong air flow should
come out the pump exhaust. If there is no flow out
the exhaust, reverse any two of the leads (L1, L2
or L3).
8. Repeat the test to verify correct rotation.
YEL (6)
F
RED (7)
L1
VPI Valve
L1
Optional
L2
WHI (8)
L3
L2
BLU (9)
L3
37