Toshiba W7 manual Lead Length Specifications, Startup and Test

Lead Length Specifications

Adhere to the 2005 NEC and any local codes during the installation of ASD/Motor systems. Excessive lead lengths may adversely effect the performance of the motor. Special cables are not required. Lead lengths from the ASD to the motor in excess of those listed in Table 1 may require filters to be added to the output of the ASD. Table 1 lists the suggested maximum lead lengths for the listed motor voltages.

Table 1. Suggested maximum lead lengths.

Model	PWM Carrier	NEMA MG-1-1998 Section IV Part 31
	Frequency	Compliant Motors2
230 Volt	All	1000 feet
460 Volt	< 5 kHz	600 feet
	≥ 5 kHz	300 feet
600 Volt	< 5 kHz	200 feet
	≥ 5 kHz	100 feet

Note: Contact Toshiba for application assistance when using lead lengths in excess of those listed.

Exceeding the peak voltage rating or the allowable thermal rise time of the motor insulation will reduce the life expectancy of the motor.

For proper operation, the carrier frequency must be 2.2 kHz or above except when operating in the Constant Torque or Variable Torque modes.

Startup and Test

Perform the following checks before turning on the unit:

•L1/R, L2/S, and L3/T are connected to the 3-phase input power.

•T1/U, T2/V, and T3/W are connected to the motor.

•The 3-phase input voltage is within the specified tolerance.

•There are no shorts and all grounds are secured.

16 W7 ASD Installation and Operation Manual