ABBDCS800 Hardware Manual DCS800 Drives (20 to 5200 A)

maintenance see chapter Dimensions and weights.

Cabinet installation

The required distance between parallel units is five millimetres (0.2 in.) in 

installations without the front cover. The cooling air entering the unit must not exceed 

+40 °C (+104 °F). 

Preventing cooling air recirculation Unit above another

Prevent air recirculation inside and outside the cabinet.

Terminal cover according to VBG 4 regulations

For converter modules size D1 - D4 shrouds for protection against contact are 

provided. 

Mount the D1, D2 cover using the existing lateral pins and than swing it down to snap it into the terminal 

row. D3 and D4 mounting is the same, without the snap-in mechanism.

Mounting the converter module D4+ inside an enclosure

Cooling air inlet

The cooling fan blows the air out of the front, right and left side of the converter 

module. View from

View from: right side front side left side:

Free space around the converter module

In mm:

Planning the electrical installation

Chapter overview

This chapter contains the instructions that must be followed when selecting the 

motor, cables, protections, cable routing and way of operation for the drive system. 

Always follow local regulations. This chapter applies to all DCS800 converter 

modules.

Attention:

If the recommendations given by ABB are not followed, the drive may experience 

problems that the warranty does not cover. See also Technical Guide.

Options 

Line reactors (L1)

For armature and field supply.

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