English
2. INSTALLATION
G85139-H1750-U049-C1
© Siemens plc 1999
19/08/99
14
5. Ensure that the power source supplies the correct voltage and is designed for the necessary current
(see
section 7)
. Ensure that the appropriate circuit-breakers with the specified current rating are connected
between the power supply and inverter
(see section 7)
.
6. For the power input, use a 3-core cable for single phase units or a 4-core cable for three phase units. For
the cross-section of each core
see section 7.
7. Use a 4-core screened cable to connect the motor.
8. Carefully measure and cut the cable leads for power connections, motor connections and braking resistor
connections (if required) before feeding the screened cables through the glands in the metal gland plate
provided (see Figure 2.2.2) and securing the glands.
9. Carefully measure and cut the cable leads for the control connections (if required). Feed the control cable
through the correct gland (see Figure 2.2.2) and secure the gland to the metal gland-plate.
10. Carefully feed the power and control leads through the correct holes in the inverter housing.
11. Secure the metal gland plate to the underside of the inverter. Fit and tighten the earth securing screw.
12. Connect the power input leads to the power terminals L/L1 - N/L2 (1 phase) or L/L1, N/L2, L3 (3 phase),
and earth (PE) (
shown in Figure 2.2.2
) and torque down the screws.
13. Connect the motor leads to the motor terminals U, V, W and the earth (PE) (
shown in Figure 2.2.2)
and
torque down the screws.
Note:
For operation with cables longer than 25m see section 1.3.
14. If required, secure Faston connectors to the braking resistor leads and fit the connectors to the B+/DC+
and B- terminals under the inverter.
15. Connect the control leads as shown in Figures 2.2.4 and 2.2.6, Section 2.2.4 and 2.2.6.
2.2.3
Power and Motor Connections - Frame Size C
The terminal arrangement for frame size C is identical to frame size A
(see Figure 2.2.1)
. However, before the
wires can be connected to the terminal blocks, you must lower the fan housing and secure the cables to the
gland plate.
Refer to Figure 2.2.3 and proceed as follows:
1. While supporting the fan housing with one hand, insert the blade of a screwdriver into slot A on the
underside of the inverter and press upwards to release the securing tab. Lower the fan housing, allowing it
to swing out to the right on its side-mounted hinges.
2. Applying pressure to the gland plate release clips B and C in the direction of the arrows. Swing the plate
out to the left on its side-mounted hinges,
3. Secure each cable to the correct hole in the gland plate, ensuring that the exposed wires are long enough
to reach the terminal blocks.
4. Connect the wires to the terminal blocks as shown in Figure 2.2.1 (See section 2.2.4 for information about
connecting the control wires.) IT IS MOST IMPORTANT THAT THE MOTOR AND CONTROL WIRES
ARE KEPT APART.
5. Swing the gland plate back into the base of the inverter. Ensure that the release clips snap into position.
6. Swing the fan housing back into the base of the inverter.
