ABB REL650 User Manual

“Ready”
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The function is in “ready” status when the following conditions are fulfilled:
• the circuit breaker is ready
• the circuit breaker must have been closed for more that the set time in setting:
tCBClosedMin
• the function is not in “blocked” status
• the function is not in “in progress” status
Only in “ready” status a start of the auto reclosing sequence is possible.
“In progress”
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The function is in “in progress” status when the following condition is fulfilled:
• the auto reclosing sequence is started
Start can be initiated by either protection trip command or circuit breaker position
change. The second starting alternative is only possible when enabled by a setting.
In “in progress” status the dead time starts and the status ceases when the dead time
expires. Then circuit breaker close command is given and the function changes its
state into the "reclaim time" status.
“Reclaim time”
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The auto recloser is in “reclaim time” status while the following conditions are
fulfilled:
• the reclaim time has not yet expired
• the status is not interrupted by either a new start signal or a block signal
A new start signal during “reclaim time” status forces the function to proceed to
next shot and change state into “in progress” status, as long as the last shot is not
reached.
“Blocked”
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The function is in “blocked” status when an external blocking signal exists. No
auto reclosing is possible in “blocked” status. Only an external signal for
cancellation of the blocking can cancel this status.
11.2.6.3 Description of the status transition
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From Table
200 below it is possible to see which status transitions are possible.
When the auto recloser is for instance in “inactive” status only two transition are
possible:
• transition to “ready” status when the circuit breaker is ready and closed
• transition to “blocked” status by external blocking
1MRK 506 382-UEN A Section 11
Control
Line distance protection REL650 2.2 IEC 359
Technical manual

ABB REL650 Specifications

General

Brand	ABB
Model	REL650
Category	Protection Device
Language	English