07EB61 ABB input and output unit

This section tells you how to install the drive on wall without vibration dampers. The degree of protection is IEC:

IP00 and UL: open type.

1. See the dimensions in chapter Dimensions and weights.Mark the locations for the four mounting holes.
2. Drill the mounting holes.
3. Insert wall plugs into the holes and start to screw bolts into the plugs. Drive the bolts deep enough into the

wall to make them carry the weight of the drive.

4. Position the drive onto the bolts on the wall.
5. Tighten the bolts securely in the wall.

When thyristor converters operate, the line voltage is short-circuited during commutation from one

thyristor to the next. This operation causes voltage dips in the mains PCC (point of common

coupling). For the connection of a power converter system to the mains, one of the following

configurations applies:

Configuration A

When using a converter, a minimum of impedance is required to ensure proper

performance of the snubber circuit. Use a line reactor to meet this minimum

impedance requirement. The value must therefore not drop below 1 % uk (relative

impedance voltage). It should not exceed 10 % uk, due to considerable voltage drops

at the converters outputs.

Configuration B

If special requirements have to be met at the PCC (standards like EN 61 800-3, DC

and AC drives at the same line, etc), different criteria must be applied for selecting a

line reactor. These requirements are often defined as a voltage dip in percent of the

nominal supply voltage. The combined impedance of ZLine and ZL1 constitute the total

series impedance of the installation. The ratio between the line impedance and the line

reactor impedance determines the voltage dip at the PCC. In such cases, line chokes

with an impedance around 4 % are often used.

Example calculation with ukLine = 1 % and ukL1 = 4 %:

Voltage dip = ZLine / (ZLine + ZL1) = 20 %. Detailed calculations see Technical guide.

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