ABB RELION REF615R, Техническое руководство

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AND
AND
AND
Timer 2 elapsed
From Timer 2
Timer 1 elapsed
From Timer 1
TON
150.0 ms
PICKUP
AND
CB failure mode ”Current”
CB failure mode ”Breaker
status”
POSCLOSE
CB failu re trip mode
“1 out of 4"
50G
From Level detector 2
50P
From Level detector 1
AND
Set
Reset
Enable timer
BLOCK
AND
OR
CB failu re trip mode
“2 out of 4"
50G
From Level detector 2
50P
From Level detector 1
AND
OR
GUID-61D73737-798D-4BA3-9CF2-56D57719B03D-ANSI V2 EN
Figure 156: Start logic
Timer 1
Once activated, the timer runs until the set Retrip time value has elapsed. The time
characteristic is according to DT. When the operation timer has reached the value set with
Retrip time , the retrip logic is activated. A typical setting is 0...50 ms.
Timer 2
Once activated, the timer runs until the set CB failure delay value has elapsed. The time
characteristic is according to DT. When the operation timer has reached the set maximum
time value
CB failure delay , the backup trip logic is activated. The value of this setting is
made as low as possible at the same time as any unwanted operation is avoided. A typical
setting is 90 - 150 ms, which is also dependent on the retrip timer.
The minimum time delay for the CB failure delay can be estimated as:
CBfailuredelay Retriptime t t t
cbopen BFP reset margin
≥ + + +
_
A070693 V3 EN
(Equation 18)
1MRS240050-IB C
Section 5
Protection-related functions
REF615R 321
Technical Manual