Troubleshooting Guide; What This Chapter Contains; Fault Treatment Procedure - ABB PQFM Instruction Manual

Power quality filter

Table of Contents

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11 Troubleshooting guide

This chapter presents the troubleshooting guide for the active filter. The filter fault

treatment procedure is described. Also, an overview of possible errors is given. Finally,

recommendations are made on how problems may be resolved.

WARNING: All troubleshooting and repair work described in this chapter should only

be undertaken by a qualified electrician. The safety instructions presented in

Chapter 2

of this manual must be strictly adhered to.

WARNING: High AC and DC voltages may be present in the filter panel. Do not touch

any filter parts unless you have ascertained that they do not carry dangerous

voltage levels.

WARNING: Under no circumstances close the main contactor manually. Failure to

adhere to this guideline may result in physical injury and/or in filter damage.

WARNING: Some checks may have to be made with the supply on and the filter doors

opened. These tests must be carried out only by authorized and qualified personnel,

in accordance with the local regulations. Apply the safety guidelines that are

presented in

Chapter

lethal physical injury.

All faults that occur are stored in the filter event log and are analyzed by the filter

controller. The event log is of the circular type and can store up to 200 events. It can

be accessed through [/Welcome/PQF Monitoring/Event logging]. Background

information on the event logging display is given in

A fault can either be non-critical or critical.

A non-critical fault is a transient fault (e.g. a voltage spike). When a non-critical

fault occurs the filter may stop the switching of the IGBTs momentarily (< 40

ms) but they will automatically restart. The only way to pick up this type of fault

is to analyse the event log. Given the transient/random character of this type

of fault, the filter performance will hardly deteriorate when it occurs.

204 Troubleshooting guide ç Manual Power Quality Filter PQFM

2. Failure to adhere with the safety guidelines may result in

Section

7.10.3.

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