Cutting Tool Operating Guide 3
1. Introduction
1.1 Document revision history
1.2 Related documentation
Before taking the cutting tool into use, familiarize yourself with the applicable documents. Depending on the cutting tool,
see the appropriate document.
Document revision/date History
A/2018-05-02 First release
Name of the document Document ID
Relay Retrofit Program for REX 521
Product Guide 1MRS758962
Relay Retrofit Program for REX 521
Cutting Tool Safety Guide 1MRS758975
See the REX 521 and 615 series documentation for detailed technical information on the relays. Product series- and
product-specific manuals can be downloaded from the ABB Website http://www.abb.com/mediumvoltage.
1.3 Symbols
The warning icon indicates the presence of a hazard which could result in personal injury.
The caution icon indicates important information or warning related to the concept discussed in the text. It might
indicate the presence of a hazard which could result in corruption of software or damage to equipment or property.
The information icon alerts the reader of important facts and conditions.
The tip icon indicates advice on, for example, how to design your project or how to use a certain function.
Although warning hazards are related to personal injury, it is necessary to understand that under certain operational condi-
tions, operation of damaged equipment may result in degraded process performance leading to personal injury or death.
Therefore, comply fully with all warning and caution notices.
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