Hitachi J300U Series instruction manual IPS Powr, IPS Trip OFF

Appendix 2 Instantaneous Power Failure Restart and Commercial Power Source Switching

1. Instantaneous power failure restart

[Function Outline]

This function allows an inverter operation to be selected according to the subject system as follows when an instantaneous power failure occurs.

•Retry mode: When FTP/RST/ZST is set at IPS POWR

•Alarm mode: When ALM is set at IPS POWR

• f matching:	The rotation speed and the phase are detected while the motor is on a free
	running to restart the operation accordingly.

WARNING

lWhen the inverter stops due to a trip with retry mode selected, the motor restarts suddenly. Stand clear of the machine. Otherwise, you may be injured. (Design the machine in such a way that persons are protected against a restart of the machine.)

[Setting Method]

						Atovercurrent/
Remote operator [F-22]		Digital operator		At instantaneous power failure	At low voltage	overvoltage/	At other
						powermoduleerror	error
IPS TIME	0.3 to 25.0	—	Set an allowable instantaneous		—	—	—
				power failure time.
IPS WAIT	0.3 to 100.0	—	Set a wait time after an instantaneous power failure/power restoration				—
				in the retry mode or after an error.
IPS POWR	ALM	0		Tripping with an instantaneous	Tripping	Tripping	Tripping
				power failure within the IPS
				TIME. If an operation command
				is issued for an instantaneous
				power failure detected out of the
				IPS TIME, restart the operation (0
				Hz start).
	FTP	1		The f matching stops with an	The f matching stops	The f
				instantaneous power failure	if power is restored	matching is
				detected within the IPS TIME.	within 40s.	retried.
				The inverter trips with an	The inverter trips
				instantaneous power failure	unless power is
				detected out of the PIS TIME.	restored within 40s.
	RST	2		The f matching is restarted if the	The f matching is
				instantaneous power failure is	restarted if power is
				within the IPS TIME. The	restored within 40s.
				inverter trips if the instantaneous	The inverter trips
				power failure is not within the	unless power is not
				IPS TIME.	restored within 40s.
	ZST	3		The inverter is restarted at 0 Hz if	The inverter is started
				the instantaneous power failure is	at 0 Hz if power is
				within the PIS TIME. The	restored within 40s.
				inverter trips if the instantaneous	The inverter trips
				power failure is not within the	unless power is
				IPS TIME.	restored within 40s.
IPS TRIP	OFF	—	No retry at an instantaneous power failure and no trip			—	—
				at low voltage during the inverter stop.
	ON	—	Retry or under voltage trip is performed during the			—	—
				inverter stop or running.

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