ACS600 Control Boards 9YPM 010606

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Maintenance NoteABB Automation Products DOCMNACS60029

ABB Oy, Product Support

ACS600

Main Circuit Control BoardsDepartment Date Author Checked / Approved Revision Page

TLC 27.06.2006 Ari Niskanen Kari Rusanen C 1 (3)

© Copyright 2006 ABB Oy. All rights reserved.

9 Years Preventive Maintenance

FUNCTIONAL DESCRIPTION:

The NGDR-xx, NRED-61, NXPP-xx, NINT-xx and flat cables are the parts of thecontrol circuits for power plate modules. The logic circuits produce gate control pulsesfor IGBTs and ensure that the two devices associated with a single output phase arenot gated on simultaneously.

REASONS FOR THE CHANGE:

NGDR-xx boardsThe gate driver boards have ageing components like electrolytic capacitors .Theestimated lifetime of the electrolytic capacitors is about 90 000 hours. Ourrecommendation is to change NGDR-xx boards every 9 years to avoid the risk ofdestroying the PowerPlate components due to weak or wrong control pulses from anaged component.

S p e c i f i c a t i o n s s u b j e c t t o c h a n

g e w i t h o u t n o t i c e .

Picture 1. Leaked electrolytic capacitors on NGDR board





ACS600




NRED-61 adapters (only 690 VAC units)

NRED-61 is thick-film hybrid and it is used as a voltage adapter between the DC linkand the power supply.

Picture 2. NRED-61 adapter

Improper operation of the adapter has been every now and then the reason for power

supply failures especially after over voltages in the dc link.We recommend replacing NRED-61 adapters every 9 years to avoid the risk of powersupply failures.

NXPP-xx, NINT-xx boards and flat cables

A set of NXPP-xx/NINT-xx /flat cable is used for a large amount of signaling.

Picture 3. NXPP-01 board

Picture 4. NINT-63 board





ACS600




We recommend changing the set of NXPP-xx/NINT-xx/ flat cable every 9 years toavoid the risk of random type of signaling errors especially in corrosive environment.

THE RESULTING EFFECT:

If the control boards do not work properly, there is a very high risk of IGBT damages inthe inverter units because of:

1. Wrong timing of control pulses.

2. Low or short control pulses.

3. Power supply failures

4. Random type of signaling errors

Picture 5. NGDR control pulses specified characteristic curve (left) and degraded waveform (right).

WHERE USED:

All ACS600 Drives

ACS600 Control Boards 9YPM 010606

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