Short Time Overcurrent

The TeSys Tera system provides the definite time short time overcurrent protection function.

The short time overcurrent protection function generates the following signals:

Alarm: Any of the three-phase currents of the motor goes above the alarm level.
Trip: Any of the three-phase currents of the motor goes above the pickup level for the specified time delay.

WARNING
UNINTENDED EQUIPMENT OPERATION Starter function do not stop the motor by de-energizing the contactor output on occurrence of short time overcurrent trip. Configure the separate digital output for short time overcurrent trip, to control circuit breaker. Common trip signal do not trip in case of short time over current. Failure to follow these instructions can result in death, serious injury, or equipment damage.

WARNING

UNINTENDED EQUIPMENT OPERATION

Starter function do not stop the motor by de-energizing the contactor output on occurrence of short time overcurrent trip.

Configure the separate digital output for short time overcurrent trip, to control circuit breaker.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

The short time protection function has the following configurable settings:

Parameter	Setting range	Default value
Function	Disable Alarm Trip Alarm + Trip	Disable
Pickup	100–1000% of IFLC in step of 1%	100% of IFLC
Time Delay	0.05–10.00 s in step of 0.01 s	0.05 s
Alarm Level	100–1000% of IFLC in step of 1%	100% of IFLC
Reset Mode	Reset key DI Communication Auto	DI + Reset Key
Auto-Reset Delay (applicable only if Reset mode is Auto)	0.0–6000.0 s in step of 0.1 s	0 s