ABB RELION REX640 Technical Manual page 1176

Protection and control

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Protection related functions

Figure 667: Functional module diagram

The duration of the TRIP output signal from TRPPTRC can be adjusted with the

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

function has a single trip output TRIP for connecting the function to one or more

of the protection relay's binary outputs, and also to other functions within the

protection relay requiring this signal.

The BLOCK input blocks the TRIP output and resets the timer.

Lockout logic

TRPPTRC is provided with possibilities to activate a lockout. When activated, the

lockout can be manually reset after checking the primary fault by activating the

RST_LKOUT input or from the LHMI clear menu parameter. When using the "Latched"

mode, the resetting of the TRIP output can be done similarly as when using the

"Lockout" mode. It is also possible to reset the "Latched" mode remotely through a

separate communication parameter.

The CL_LKOUT and TRIP outputs can be blocked with the BLOCK input.

Table 1123: Operation modes for the TRPPTRC trip output

The minimum pulse trip function is not active when using the "Lockout"

or "Latched" modes but only when the "Non-latched" mode is selected.

Trip pulse length parameter gives the

minimum pulse length for

is latched ; both local and remote clear-

ing is possible.

is locked and can be cleared only locally

via menu or the

1MRS759142 F

Technical Manual