circuits

Hi, in IEEE 3 bus, why are circuit breakers connected at the 'load' rather than connected at the 'generator and load'?

Hi people I would like to make a digital clock with HOURS and MINS using 74LS192 IC. Below attached is my schematic diagram for the connection of the circuit. However, the MINS counter keeps counting from 00-59 and resets and does not increase the HOURS counter after each 60mins. Components...

I'm working on a project in NI Multisim i simply cannot find two Balance ICs: HY2210 and HY2213 or their replacements or some circuit or SPICE models. I've searched ewerywhere I could think of and no sings of such. Please, help me.