Functional Diagrams; Functional Diagrams For Protection - ABB RELION 615 Series Applications Manual

1MAC109016-MB C
3.3.3
3.3.3.1
REF615 ANSI
Application Manual
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Functional diagrams

The functional diagrams describe the default input, output, alarm LED and function-to-
function connections. The default connections can be viewed and changed with PCM600
according to the application requirements.
The analog channels have fixed connections to the different function blocks inside the
protection relay's standard configuration. However, the 12 analog channels available for
the disturbance recorder function are freely selectable as a part of the disturbance
recorder's parameter settings.
The phase currents to the protection relay are fed from a current transformer. The residual
current to the protection relay is fed from either residually connected CTs, an external core
balance CT, neutral CT or calculated internally.
The signal marked with IA, IB and IC represents the three phase currents. The signal IG
represents the measured ground current.
The protection relay offers six different setting groups which can be set based on
individual needs. Each group can be activated or deactivated using the setting group
settings available in the protection relay.
Depending on the communication protocol the required function block needs to be
instantiated in the configuration.

Functional diagrams for protection

The functional diagrams describe the relay's protection functionality in detail and
according to the factory set default connections.
Four overcurrent stages are offered for overcurrent and short-circuit protection. The non-
directional instantaneous stage PHIPTOC1_50P-3 can be blocked by energizing the
binary input X120:BI1.
REF615 standard configurations
Level trigger mode
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Section 3
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