ABB NOCH0070-6 Series Manuel utilisateur

ABB drives

Hardware manual

du/dt filters

AOCH0260-70

AOCH0400-70

NOCH0016-6x

NOCH0030-6x

NOCH0070-6x

NOCH0120-6x

NOCH0260-60

NOCH0400-60

NOCH0760-60

3AFE58933368 REV G

EFFECTIVE: 2009-09-15

Table of contents

About this manual

What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Target audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operation principle

What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operation principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Graphs illustrating the effect of the du/dt filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Selecting the du/dt filter

What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Filter selection procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Applicability checks of the pre-selected filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Maximum current and heat dissipation capacity of the filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Installation

What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

General notes and restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Mechanical installation and tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Tightening torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Power connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Detail photos of the NOCH0120-6 connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Technical data

Ambient conditions, operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Ambient conditions, storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Ambient conditions, transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table of contents

Internal circuit diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Dimension drawings

Further information

Product and service inquiries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Product training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Providing feedback on ABB Drives manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Document library on the Internet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

About this manual

What this chapter contains

The chapter describes the target audience and safety in short.

Target audience

The manual is intended for people who select, plan the installation, install,

commission and use the du/dt filter. Read the manual before working on the filter.

The reader is expected to know the fundamentals of electricity, wiring, electrical

components and electrical schematic symbols.

The manual is written for readers worldwide. Both SI and imperial units are shown.

Safety

Only qualified specialists are allowed to install, commission and maintain the du/dt

filter.

The complete safety instructions for the drive are given in the drive hardware

manual. Read and follow the complete safety instructions before working on the

drive.

The following instructions are intended for all who install and service the du/dt filter.

Ignoring the following instructions can cause physical injury or death, or damage to

the equipment.

WARNING!

•The filter is heavy. Lift the filter by the lifting holes only.

•Ground the filter properly:

- Fasten the filter with the four fastening screws to a metallic installation base.

- Ensure that there is a proper galvanic connection in between the base and

the PE busbar of the cabinet.

•Beware of hot surfaces. The surface temperature of the du/dt filter can exceed

150 °C (302 °F) during operation. Let the filter cool off for two hours before

servicing it.

•Ensure sufficient cooling. See chapter Installation.

About this manual

Operation principle

What this chapter contains

The chapter describes the operation of the du/dt filter and the intended use.

Operation principle

The drive employs modern IGBT inverter technology. Regardless of frequency, the

drive output comprises pulses of approximately the drive DC bus voltage with a very

short rise time. The pulse voltage can almost double at the motor terminals,

depending on the attenuation and reflection properties of the motor cable and the

terminals. This can cause additional stress on the motor and motor cable insulation.

Modern variable speed drives with their fast rising voltage pulses and high switching

frequencies can generate current pulses that flow through the motor bearings, which

can gradually erode the bearing races and rolling elements.

The common mode filters mainly reduce bearing currents. The du/dt filters also

protect the motor insulation system.

To avoid damage to motor bearings and insulation system:

• Select and install the cables according to the instructions given in the hardware

manual.

• Check if the installation needs to be equipped with additional protection

equipment, such as insulated N-end bearings in the motor, or the drive output

filters. The requirements are specified in the drive Hardware manual. See chapter

Planning the electrical installation, section Selecting the motor, and chapter du/dt

filter.

Operation principle

Graphs illustrating the effect of the du/dt filter

The graphs show the peak line-to-line voltage (ÛLL

) and voltage change (du/dt) at

the motor terminals as a function of the motor cable length.

ÛLL

and du/dt are scaled

to the nominal line-to-line voltage

(UN

). To calculate the actual peak voltage value in

volts and du/dt value in volts per microsecond, multiply the values of the graph by

the supply voltage

(UN

The values in the first graph are measured with an ABB du/dt filter while the second

graph without any output filtering. The values in the second graph are only

representative. The actual unfiltered du/dt values depend on the drive type, and are

usually in the range of 1 to 5 kV/microsecond.

In case of drives with an IGBT supply unit or resistor braking, the ÛLL and du/dt

values are approximately 20% higher.

The voltage rise time can be calculated as follows: t = 0.8 · ÛLL/(du/dt).

ÛLL/UN

Without du/dt Filter

Cable length (m)

du/dt

-------------(1/μs)

1.0

2.0

5.0

4.0

3.0

1.5

2.5

3.5

4.5

100 200 300

0.0

0.5

1.0

1.5

2.0

2.5

3.0

Cable length (m)

With du/dt Filter

du/dt

-------------(1/μs)

ÛLL/UN

5.5

Selecting the du/dt filter

What this chapter contains

The chapter instructs in selecting a du/dt filter for your drive.

Filter selection procedure

1) For the ACS800 drives, the data can be found either from the appropriate Technical catalog or

Hardware manual. The PDF files are available at www.abb.com/drives.

Applicability checks of the pre-selected filter

Long or several parallel motor cables, or special cable types may cause excessive

temperature rise in the filter. Therefore, check that the pre-selected filter fulfils these

general requirements valid for every installation:

• The motor cable length does not exceed the maximum allowed length. The

maximum length is given in the Hardware manual of the drive. For some filter

types the length is still restricted independent on the drive type. Check the

maximum values in section General notes and restrictions starting from page 11.

• The energy loss in the du/dt filter does not exceed the maximum heat dissipation

capacity of the filter (Emax) given in subsection Maximum current and heat

dissipation capacity of the filter below. The energy loss is calculated as follows:

E= ½ · C · (Udc)2where

• The current through the filter does not exceed the maximum value given in

subsection Maximum current and heat dissipation capacity of the filter below.

Step What to do More information

1. Check whether a du/dt filter

is needed in the installation. The requirements are specified in the drive Hardware

manual. See chapter Planning the electrical installation,

section Selecting the motor, and chapter du/dt filter.1)

2. Pre-select a filter according

to the drive type. Filter selection tables are in the drive Hardware manual.1)

The pre-selected filter is suitable for most applications.

3. Check that the pre-selected

filter is suitable for your

application.

Section Applicability checks of the pre-selected filter below.

If the checks are passed, use the pre-selected filter. If any of

the conditions is not met, choose a bigger filter, use two

filters in series or change the motor cabling.

E energy loss in the du/dt filter

C total capacitance of the motor cable(s), i.e. the product of the capacitance/length value

given in the cable catalogue and the length of the motor cable. In case of parallel motor

cables, the total capacitance is the sum of the individual cable capacitance.

Udc average intermediate circuit DC voltage of the drive = approximately 1.35 · UN

UNsupply voltage.

Selecting the du/dt filter

Maximum current and heat dissipation capacity of the filter

The maximum current (Ith) and heat dissipation capacity (Emax) of the filter are given

in the table below.

400 V 500 V 690 V

Du/dt filter type Ith / Arms Ith / Arms Ith / Arms Emax / mJ Ploss / W

NOCH0016-60/2 19 19 15 24 110

NOCH0016-65 19 19 15 8 58

NOCH0030-60/2 41 41 28 28 167

NOCH0030-65 41 41 28 9 95

NOCH0070-60/2 112 112 65 35 210

NOCH0070-65 112 112 65 12 150

NOCH0120-60 178 164 113 94 240*

NOCH0120-62 166 157 113 47 210*

NOCH0120-65 166 157 113 15 180*

NOCH0260-60 375 345 230 134 441*

NOCH0400-60 521 495 351 252 750*

AOCH0260-70 1) 261 258 177 94 309*

AOCH0400-70 1) 445 440 280 176 525*

AOCH0260-70 2) 375 345 230 134 441*

AOCH0400-70 2) 521 495 351 252 750*

1) Filters mounted on top of each other

2) Filters mounted side by side

* Value is for a kit, which includes three filters.

Ce manuel convient aux modèles suivants

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