Hitachi SJ2002 manual Motor Overload Protection

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400V Models

Motor output		Inverter Model	Ampere Rating for
		Inverter Model	Ampere Rating for
kW	HP		Fuse or Breaker
kW	HP


0.4	1/2	–004HFE(F)2/HFU2	3

0.75	1	–007HFE(F)2/HFU2	6

1.5	2	–015HFE(F)2/HFU2	10

2.2	3	–022HFE(F)2/HFU2	10

3.0	4	–030HFE(F)2	15

4.0	5	–040HFE(F)2/HFU2	15

5.5	7 1/2	–055HFE(F)2/HFU2	20

7.5	10	–075HFE(F)2/HFU2	25

Motor Overload Protection

Hitachi SJ2002 inverters provide solid state motor overload protection, which depends on the proper setting of the following parameters:

•B012 “electronic overload protection”

•B212 “electronic overload protection, 2nd motor”

Set the rated current [Amperes] of the motor(s) with the above parame- ters. The setting range is 0.2 * rated current to 1.2 * rated current.

Warning: When two or more motors are connected to the inverter, they cannot be protected by the electronic overload pro- tection. Install an external thermal relay on each motor.

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Contents SJ2002 Series Inverter Quick Reference Guide Page Wiring Warnings for Electrical Practices and Wire Sizes UL Cautions, Warnings, and InstructionsTerminal Tightening Torque and Wire Size AWGWire Connectors Fuse and Circuit Breaker SizesMotor Overload Protection Power Circuit Terminals HFU2Control Circuit Terminals Description Ratings and NotesAL2 Basic Wiring Diagram SJ200Inverter Keypad Operation HitachiPage Program Mode Keypad Navigation MapPowerup Test Step Description Via Keypad Via Logic TerminalsError Codes Basic Error CodesError Trip Conditions E60Restoring Factory Default Settings Parameter Tables Group Monitoring FunctionsMonitor Mode Trip History and Inverter StatusGroup Main Profile Parameters Group Standard FunctionsFunc Default Set Name / Description Value Code Gain setting AVR voltage select Group Fine-tuning Functions Overload restriction operation mode Group Intelligent Terminal Functions C052 PID FBV function high limit C082 OI input span calibration Group Motor Constants Functions Group Expansion Card FunctionsSymbol Code Input Terminal Name Intelligent Input Terminal ListingAnalog Input Configuration Intelligent Output Terminal ListingAnalog Output Function Listing Option Function Name Description Corresponding Code