The application manual contains an overview of Relay Retrofit Program for REX 521
and the application description. The manual describes how the program deliverables
can be used in the relay retrofit application. The manual also provides information on
the retrofit process and the recommendations for the supported relay types.
The configuration migration support guidelines provided in the application manual
show the steps composing the process of migrating the existing REX 521 relay
configuration and parameters to the replacement relay.
The installation manual contains instructions on how to install the mounting assembly
with pre-wired terminals. The manual provides procedures for mechanical and electrical installation.
The chapters are organized in chronological order in which REX521RRP should be installed.
Cutting tool safety guide contains safety recommendations to the user.
Cutting tool operating guide illustrates how the cutting tool is prepared for operation.
The guide contains instructions on how to operate the tool during relay retrofit.
Relay Retrofit Program for REX 521 Product Guide 1MRS758962
Relay Retrofit Program for REX 521 Installation Manual 1MRS758961
Relay Retrofit Program for REX 521 Application Manual 1MRS758960
Relay Retrofit Program for REX 521 Cutting Tool Safety Guide 1MRS758975
Relay Retrofit Program for REX 521 Cutting Tool Operating Guide 1MRS758976
Although warning hazards are related to personal injury, it is necessary to understand
that under certain operational conditions, 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.
Document conventions
A particular convention may not be used in this manual.
• Abbreviations and acronyms are spelled out in the glossary. The glossary also
contains definitions of important terms.
• Parameter names are shown in italics.
The function can be enabled and disabled with the Operation setting.
• Parameter values are indicated with quotation marks.
The corresponding parameter values are "On" and "Off".
• Input/output messages and monitored data names are shown in Courier font.
When the function starts, the START output is set to TRUE.
When the relay uses the RS-485 bus for the serial communication, both two- and four wire connections are supported.
Termination and pull-up/down resistors can be configured with jumpers on the communication card so external resistors are not needed.
The relay supports the following time synchronization methods with a time-stamping resolution of 1 ms.
REC670 IEDs (Intelligent Electronic Device) provide control solutions for any type of switchgear and different switchgear configurations.
The customized REC670 gives you the freedom to select the functionality entirely according to your needs.
The protection functions also support different types of networks, such as, isolated neutral networks,
resonant-earthed networks and partially earthed networks.
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