... Open-phase protection, tE protection and undercurrent protection.MMPR-220 microcomputer motor protection controller MMPR-230 microcomputer motor protection ... protection, unbalance protection, zero-sequence current protection, open-phase protection, Phase sequence protection, low-voltage protection, process concatenation, ... -100 √ √ √MMPR-220√√√√√ √√MMPR-230√√√√√ √√ Motor protection controller