VAr Bias Lead or Lag
Indicates when the VAr Bias effect (Lead or Lag) has exceeded the time limit imposed by
the Max VAr Bias Duration Setting.
Master/Follower Lockout
There are two types of lockout conditions, Master lockout and Follower lockout. Any
lockout of the paralleling mode will set the Master/Follower Lockout Alarm. When a
lockout condition exists, the control issuing the lockout will stop any further GOOSE
publishing and will stop load voltage regulation. Also, the alarm can be configured as a
DNP event, or as a report in case of IEC 61850. The lockout state will be displayed on the
control front panel display and in the Master/Follower Configuration Tool.
Master/Follower Alarm messages can be observed for the connected
control from the TCC600® Monitor/Master/ Follower Alarm messages
menu item.
Master Lockout
•
Follower Detection Lockout - When the control powers up in Master Mode, the
control will wait for approximately 65 seconds to allow all the GOOSE messages
from all the Followers in the network to reach the Master. Once all GOOSE messages
have been received, the Master will start its normal algorithm. If within the initial 65
second period the Master does not receive all the GOOSE messages it expected, it will
enter the Master lockout state.
•
Follower Timer Lockout - The Tap Position Response Timer will start after the
Master has published its new tap position message after it has performed a successful
tap operation. If it doesn’t receive the tap position messages from all the participating
Followers in the network before the timer expires, then a Master Lockout is issued.
•
Tap Difference Lockout - If the Tap position difference between any Follower and the
Master is greater than or equal to the Tap Difference setting, the Master will enter the
lockout state.
•
Follower Comm. Loss Lockout - If any follower does not send a valid retransmitted
GOOSE message within a 65 second internal keepalive time, then a lockout is issued,
signaling a broken communication link.
Follower Lockout
•
Master Comm. Loss Lockout - When the Follower does not receive a valid
retransmitted GOOSE message from the Master, within a 65 second internal
keepalive time, and if the previous Master GOOSE message indicates that the breaker
1VAC388793-MB A
Section 3
Operation
TCC300
75
User Manual
Summary of Contents for TCC300
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