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InteliLite4 AMF20 Global Guide
125
Protection blocking
It is possible to configure one Protection Blocking to any
. This function is used
to block certain protections when their function is unwanted or meaningless. Each user protection has an
option to set the blocking condition.
Block Type
Description
All the time
The protection is not blocked. It can be blocked only by LBI
Run Only
Block Delay
The protection is blocked depending on engine state and time defined by setpoint
. It can also be blocked by LBI
.
Force Block
The protection is blocked by LBI
or by LBI
.
Electrical
Protection
The protection is blocked depending on engine state. It is unblocked once
is elapsed or GCB is closed. It can also be blocked by LBI
Protection blocking
Note:
LBI
(Shutdown Override) does not block evaluation of user protection
conditions and their visualization. They are recorded into alarm list or history. It only blocks their actions.
Shutdown Override blocks all level 2 (Sd,BOC) protection. It does not block level 1 (Wrn, AHI, Hist) or
protection of type
.
Image 5.24 Run only block delay and electrical protection blocking
History record
Always – History is recorded all the time.
Once – History is recorded only once after fault reset.
Note:
Every User protection is evaluated with period 0.1 s.