| Terminal | Function | Critical Note | |----------|----------|----------------| | L1, L2 (or L/N) | Auxiliary power (230V AC) | Connect before the main breaker so controller stays powered even if bank is off. | | V1, V2 | Voltage sensing | Must be on load side (after main CB). | | I1, I2 | Current transformer (CT) input | CT must be on incoming main feeder, all phases passed through . Polarity matters! | | 1–6 | Relay outputs (NO) | Each drives a contactor coil (use external fuse, 2A max). | | 17-18 | Alarm relay | NC = OK; NO = alarm (over/under PF, over temp, etc.) |
⚠️ Reversing CT polarity will cause the controller to think PF is leading when it’s lagging—leading to wrong switching. 3. Programming the MSC-6 (Step-by-Step) Press PROG for 3 seconds to enter setup. Use arrow keys to adjust values. msc 6 power factor controller manual
Here’s a well-structured, informative post suitable for a blog, forum (like Reddit’s r/PLC or r/electricians), or a technical support page. Mastering Your MSC-6 Power Factor Controller: A Practical Manual Guide | Terminal | Function | Critical Note |