Operation Principle - Hitachi Relion 650 Series Technical Manual

Section 12
Monitoring
Name
Mode
BreakerType
LearnNONC
AvgSetSel
Table 297: CBLEARN Non group settings (advanced)
Name
AlmTolRange
AlmTolSetSel
12.22.6

Operation principle

This function is used to acquire the primary contacts' and optionally the auxiliary contacts' (NO/52a
and NC/52b) timing information during CB test mode. CBLEARN receives the switching commands
on its binary inputs and releases time staggered commands to the individual poles of the circuit
breaker through SSCPOW function block. From the status changeover instants of primary and
auxiliary contacts, CBLEARN calculates the switching times and detects command errors and wiring
errors. Typical expected sequences of contact changeover, in each CB pole, are shown in
and Figure
336
Values (Range) Unit
Open -
Close
Open & Close
SPO breaker -
TPO breaker
MainOnly -
NO&Main
NC&Main
NO&NC&Main
setOPisCalcAvgVal -
ues
setOPisDefaultValu
es
Values (Range) Unit
0.0 - 100.0 %
AlmTolOnDefVal -
AlmTolOnAvgCalV
al
151.
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Step Default
- Open & Close
- SPO breaker
- MainOnly
- setOPisCalcAvgV
alues
Step Default
0.1 10.0
- AlmTolOnDefVal
1MRK 511 557-UEN Rev. A
Description
Operation type selection (open/close/
open and close)
Type of circuit breaker(single pole
operated or single drive)
Option for learning the auxiliary contacts
operating time
Selection for final average outputs either
learnt values or default set values
Description
Tolerance for generating the last
operation time alarms
Relative tol selection for last oper time
alarms based on default set or
calculated average values
GUID-208395C4-A02D-4A25-B4ED-9D2108B91703 v3
Technical Manual
Figure 150