Megacon - the trendsetter in synchronisation control
Megacon is the inventor of the now industry standard rotating LED Synchronoscope and the original DIN96 Automatic Synchronisation Controller (in 1979).
Today Megacon uses the following two basic synchronisation control principles:
SYSTEM "S" - SECTOR SYNCHRONISATION
Bi-directional Check Synchronising Relay
The
system "S" guard is a low-differential Check Synchronising Relay.
Synchronising relay closes when phase differential is within set limits
(sector "S") for a pre-set time ("t"). Sector synchronisation is the
classical alternative for applications which allows that
synchronisation accuracy and speed of synchronisation are interrelated.
Synchronisation accuracy (Df) can be calculated by following formula:
Df = S : 360 x t
i.e. set sector (S) to 10° and retention time (t) to 0.5 sec to obtain an accuracy (Df ) of 0.05 Hz.
SYSTEM "P" - "SPOT-ON" SYNCHRONISATION
Uni-directional Fast and Accurate Synchronisation
The
dynamically controlled system "P" provides the fastest "spot-on"
synchronisation. Dynamic breaker closing time compensation assures
precision 12 o’clock synchronisation, when frequency of incoming
generator is slightly higher than busbar frequency. Synchronising relay
initiates generator breaker closure at moment "T", angle "a" is
dynamically adjusted according the two systems frequency/phase
differential.
This directional synchronisation relay allows
operation when frequency of incomer is HIGHER than bus frequency. In
this way incomer is protected against motoric operation during start-up.
