Function Block - ABB RELION REX640 Technical Manual

1MRS759142 C
5.3.2
5.3.3
5.3.4
REX640
Technical Manual

Function block

GUID-A8326C6D-65EB-4E85-B19E-08572866C750 V1 EN
Figure 579: Function block
Functionality
The master trip function TRPPTRC is used as a trip command collector and handler
after the protection functions. The features of this function influence the trip signal
behavior of the circuit breaker. The minimum trip pulse length can be set when the
non-latched mode is selected. It is also possible to select the latched or lockout mode
for the trip signal.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "on" and "off".
When the TRPPTRC function is disabled, all trip outputs intended to
go through the function to the circuit breaker trip coil are blocked.
The operation of TRPPTRC can be described with a module diagram. All the modules
in the diagram are explained in the next sections.
OPERATE
BLOCK
RST_LKOUT
GUID-35C503A3-D6D8-4B61-9F99-7F04F5CB9754 V1 EN
Figure 580: Functional module diagram
Timer
The duration of the TRIP output signal from TRPPTRC can be adjusted with the Trip
pulse time setting when the "Non-latched" operation mode is used. The pulse length
should be long enough to secure the opening of the breaker. For three-pole tripping,
TRPPTRC has a single input OPERATE, through which all trip output signals are
routed from the protection functions within the protection relay, or from external
protection functions via one or more of the protection relay's binary inputs. The
Protection related functions
Timer
Trip
logic
Lockout
logic
Section 5
TRIP
CL_LKOUT
1079