2. INSTALLATION – MICROMASTER Vector English
© Siemens plc 1999 G85139-H1751-U529-D1
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5. Ensure that the power source supplies the correct voltage and is designed for the necessary current. Ensure that the appropriate
circuit-breakers with the specified current rating are connected between the power supply and inverter see section 8.
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 8.
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 2.2.1 and torque down the screws.
13. Connect the motor leads to the motor terminals U, V, W and the earth (PE) (shown in Figure 2.2.1) and torque down the screws.
Note: For operation with cables longer than 25m see section 1.3.4
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.
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