Manual Control Solution
Manual control solutions vary from system to system and typically fall dependant on what Redundancy you have within your system, typically manual control involves physically interlocking breakers to commonly restrict paralleling of supplies.
Manual
Manual systems are generally controlled via key matrix interlocking systems or some form of manual interlocking. This restricts the operation typically of two or more circuit breakers at any one time.
A typical N+1 system would have two incoming supplies that will have two key locks with a single key that can operate both locks, but only one at once, meaning only one circuit breaker can be closed at any one time, typically to prevent paralleling of supplies but giving redundancy to the system. As more breakers are introduced the systems obviously becomes more complex, this is where truth tables are common to ensure you have the design you require and can help determine how many keys are required. Please contact us for help or more information.
Common solutions for devising such systems are Truth Tables, these are quite simply the most effective and simple way of formulating a design, as is demonstrated below for a 2N+1 System
Detailing the various scenarios along the Y axis and the input supplies along the X axis, these are detailed as TX1 = Transformer One, B/C1 = Buscoupler One, TG1 = Temporary Generator 1 and SG2 = Standby Generator 2. Linking both via a sequence of Open & Closed (1 breaker closed, 0 breakers open) references detailing the breakers required position for each scenario, accomplishing a complete project sequential control protocol