Self-holding undervoltage trip coil
Self-holding undervoltage trip coil
較大的啟動(dòng)力與長(zhǎng)時(shí)間的保持兼具，
且能自動(dòng)切換，操作簡(jiǎn)便響應(yīng)時(shí)間可調(diào)
且能自動(dòng)切換，操作簡(jiǎn)便響應(yīng)時(shí)間可調(diào)
