Controlled Switching — Buyer´s Guide
B-4
Edition 2, 2006-09
Explanations
Strategies cont.
Series Compensated
Transmission Lines
No strategy exists for controlled reclosing of series compensated lines.
Switchsync™ Controllers
Type of Controllers
The following five types of controllers are in the product program:
E113
E213
F236
L183
T183
The letters indicate basic function:
E
= standard model for switching at fixed target(s)
F
= fully equipped model for switching at fixed targets
L
= special model for switching of uncompensated transmission lines
T
= special model for switching of power transformers
• First digit in name indicates the number of input commands.
• Second digit indicates the number of adaptive channels or important
signals for the function.
• Third digit indicates the number of output commands.
Features
Frequency Adaptation
All Switchsync™ controllers are fully frequency adaptive.
All Switchsync™ controllers are designed to work for system frequencies
between 6 and 66 Hz except the model L83 for controlled no-load line
switching, which is designed for frequencies between 45 and 66 Hz.
Input Check
All controllers execute an input command check prior to processing an
input command. An input check lasts about 40 ms.
Operating Modes
All controllers except the L83 have the option of operating either in rapid
or secure mode.
In rapid mode (the operating mode for model L83), after the input check
has been performed, the controller accepts the first found reference voltage
zero.
In secure mode, the controller will accept the fourth reference voltage zero
after completion of the input check. Each cycle time of the last three cycles,
prior to output activation, must agree with the continuously measured
cycle time within specified tolerances. If not, a new count-down starts in
order to find an accepted reference point. This will ensure more precise
determination of the final reference prior to activation of the circuit breaker
coil.
Adaptation
The result of a controlled closing operation can be supervised (and
corrected accordingly in the next operation) by detection of voltage onset
instant(s), current start instant(s) or current change instant(s) in the main
circuit. Adaptation control will adjust the internally created waiting time
when needed.
For controlled opening (or closing), the contact separation instant can
be supervised. The F236 model can also be programmed to supervise
if current is flowing after the circuit breaker pole is supposed to have
interrupted the current.
Remote
Communication
Modem remote communication with controllers F236, L83 and T83 can
be arranged.
Monitoring
In adaptive mode, controllers F236, L83 and T83 store switching times,
thus permitting the circuit breaker operating times to be monitored.
