Ac Supply Requirements - Emerson Unidrive M201 Installation Manual

Unidrive hs series; unidrive m series. frame 7 to 10
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4.1.1
Ground connections
Electrochemical corrosion of grounding terminals
Ensure that grounding terminals are protected against corrosion i.e. as could be caused
by condensation.
WARNING
The drive must be connected to the system ground of the AC supply. The ground wiring must
conform to local regulations and codes of practice.
For further information on ground cable sizes, refer to Table 2-5 Protective ground cable
NOTE
ratings on page 14.
On size 7, the supply and motor ground connections are made using the M8 studs located by the
supply and motor connection terminals. Refer to Figure 4-1.
On size 8, the supply and motor ground connections are made using the M10 studs located by the
supply and motor connection terminals. Refer to Figure 4-1.
On size 9A, the supply and motor ground connections are made using the M10 studs located by the
supply and motor connection terminals. Refer to Figure 4-2.
On size 9E and 10E, the supply and motor ground connections are made using the M10 studs
located by the supply and motor connection terminals. Refer to Figure 4-3.
The ground loop impedance must conform to the requirements of local safety regulations.
The drive must be grounded by a connection capable of carrying the prospective fault
current until the protective device (fuse, etc.) disconnects the AC supply.
WARNING
The ground connections must be inspected and tested at appropriate intervals.
4.2

AC Supply requirements

AC supply voltage:
200 V drive: 200 V to 240 V ±10 %
400 V drive: 380 V to 480 V ±10 %
575 V drive: 500 V to 575 V ±10 %
690 V drive: 500 V to 690 V ±10 %
Number of phases: 3
Maximum supply imbalance: 2 % negative phase sequence (equivalent to 3 % voltage imbalance
between phases).
Frequency range: 45 to 66 Hz
For UL compliance only, the maximum supply symmetrical fault current must be limited to 100 kA
Table 4-1 Supply fault current used to calculate maximum input currents
Model
54
All
Unidrive M / HS Frame 7 to 10 Power Installation Guide
Symmetrical fault level (kA)
100
Issue Number: 5

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