Ansi Medium Voltage Metal-Clad Digital Switchgear - ABB ANSI Technical Manual

6 ANSI MEDIUM VOLTAGE METAL- CL AD DIGITAL SWITCHGEAR
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ANSI medium voltage metal-clad
digital switchgear
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ANSI medium voltage (MV) metal-clad digital
01 ReliaGear ND MV
switchgear is a new solution implemented in a
SG Digital and its
key components
traditional ANSI MV metal-clad switchgear. It is
accomplished by using proven components such
as current and voltage sensors and Relion®
protection relays and mature technologies such
as IEC 61850 digital communication.
Commissioning is very similar to commissioning
activities performed on traditional switchgear.
Differences in procedures are a result of the
implementation of Process bus and GOOSE
functionalities and usage of sensors.
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01
The traditional method of commissioning activity
starts with primary injections, then continues
with protection relays testing, apparatus
functionality verification, etc., and ends with
testing of the communication if applicable. With
digital switchgear, commissioning must start
with verification of IEC 61850 digital
communication, particularly with the Ethernet
network check. After commissioning of the
Ethernet network, there is no restriction
regarding the order of other commissioning
activities.