We never thought of it as a ZipOn, but we can accomplish that function. The MS series modular sequencer flexibility makes this fast turn-on function possible. The MS series STEP RATE may be set at 1/8, 1/4, 1/2 or 1 second. 80 circuits would require two MSP or MSLC 341-48 cabinets. Each cabinet holds up to 41 motorized breakers. Each cabinet has 4 daisy-chained, 6 step sequencer boards. Each step controls two motorized breakers, so we have 24 steps per cabinet. By installing both the 1/4 and 1/2 second STEP RATE jumpers we can set the step rate to 1/8 second. Each of the two cabinets with 24 steps, will take 3 seconds to turn on. (24 steps x 1/8 sec. = 3 sec.)
By using only 6 of the 15-second design target, there will still be some time that may be used for front end settling by setting the delay between steps 1 and 2 of the first board to 4 or even 8 seconds. A variation would be to turn on each step at 1/4 second with a settling time delay of 2 seconds for a total turn-on time of 14 seconds. (48 steps x 1/4 =12 sec. + 2 sec. settling time = 14 sec.)
For larger systems, we can turn on up to 5 sequencing systems in parallel to keep the turn-on time to a minimum. For instance: A stadium has a small MSLC panel in the control room with 24 circuits. With a 4 second settling time delay it requires 5.5 seconds to turn on. (12 steps x 1/8 sec = 1.5 sec + 4 sec. settling time = 5.5 sec.) By series-parallel connecting the daisy chain connections to five MSLC/MSP 341-48 panels we can turn on a 229 circuit system in 8.5 seconds. (Front end MSLC = 5.5 sec. + five parallel connected MSLC or MSP 341-48s, each requiring 3 sec. = 8.5 sec. total turn-on time)
