TOSHIBA

Grounding

The inverter must be grounded in accordance with Article 250 of the National Electrical Code or Section 10 of the Canadian Electrical Code, Part I and the grounding conductor should be sized in accordance with 1996 NEC Table 250-95 or CEC, Part I Table 16. See Installation Safety Precautions notes 7 and 14.

CAUTION Conduit is not a suitable ground for the inverter.

Motor Selection

1)Exceeding the peak voltage rating or the rise time allowable of the motor insulation system will reduce the life expectancy. To insure good motor insulation life, consult with the motor supplier as to determine motor insulation ratings and allowable maximum output lead distance. Long lead lenghts between the motor and the drive may require filters to be added to the drive output.

Suggested Maximum1 Output Lead Distance

AC Motor

PWM Carrier

NEMA MG-1-1998 Section IV

Voltage

Frequency

Part 31 Compliant Motors 2

230 V

All

1000 ft.

 

 

 

460 V

< = 5 kHz

600 ft.

575 V

> 5 kHz

300 ft.

 

 

 

460 V

< = 5 kHz

200 ft.

575 V

> 5 kHz

100 ft.

 

 

 

1For lead lengths that exceed suggested maximum contact Toshiba for application assistance.

2Toshiba EQP III, III-XS & EQP III-841 motors incorporate an insullation system that is in compliance with NEMA MG-1-1998 Section IV Part 31.

2)Bearing Considerations:

A.Motors operating from adjustable speed drive power sources tend to operate at higher temperatures which may increase the need for more frequent lubrication cycles.

Inspection

Specifications Precautions

Wiring

Jumpers

Panel

Keypad

Programming Parameters

Service

Dimensions

Index

4 - 5

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Toshiba H3 manual Grounding, Motor Selection

H3 specifications

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