Compare and Chose Your Right Control Level

CHARACTERISTICS	ITEMS
	Basic	Soft Start	VFD  (Frequency Drive)	Full Automation
Drive Start and Stop	Star-Delta or Direct Start	Soft Starter	Frequency Converter	Frequency Converter
Motor Protections Against:
Short circuit	Yes	Yes	Yes	Yes
Overload	Yes	Yes	Yes	Yes
Dry-Running	Yes	Yes	Yes	Yes
Low-Quality AC	-	Yes	Yes	Yes
Phases Asymmetry	-	Yes	Yes	Yes
Pump Blocked	-	Yes	Yes	Yes
Low Insulation Resistance	-	Yes	Yes	Yes
Overheating windings (built-in PTC)	-	-	Yes	Yes
Earth Leakage	-	-	Yes	Yes
				Yes
Automatic Operation Mode	Discrete Sensors	Discrete Sensors	Discrete and Analog Sensors	Discrete and Analog Sensors
Cascade pumps' Connection	-	-	Yes	Yes
Display of Sensors' Readings	-	Indicators and Electronic Instruments	Indicators and electronic instruments, signals converters	Multi-Functional Devices for all system parameters
Smooth drive and Control	-	-	Yes	Yes
PLC application	-	-	Yes	Yes
Operator panel	-	-	-	Yes
SCADA Human- Machine Interface	-	-	-	Yes
Transfers to Control Room by field bus	-	-	Yes	Yes
Onboard Computer	-	-	-	Yes
Application of DGPS Systems	-	-	-	Yes