... be highly reliable with high-performance to control the Pump Controller:HARSVERT-A series of Medium Voltage Variable Frequency ... : mortar pumps, fans, etc5. City construction: water supply pump, compressors of large air conditioning, etcIn the above industries, large ... /T 2900.34 Electro technical terminology-Electric drive and automatic controlGB/T 3797 Electrical controlling gear-Part 2: Electrical ...