Trip Reset Command

NOTE: The Reset function may lead to immediate energizing of the load, with an active command from the PLC or the Force mode function.

WARNING
UNINTENDED EQUIPMENT OPERATION Before resetting the protection functions, verify that this function does not result in unsafe conditions. Failure to follow these instructions can result in death, serious injury, or equipment damage.

A tripped TeSys avatar can only reset protection trips after receiving a Trip Reset command and if all the trip reset conditions are met for all its protection functions. This mechanism helps ensure that, after a trip, normal operation can only resume when all the defined normal operational conditions are met again.

When a protection function has caused an avatar to trip, the avatar remains in the tripped state until both of the following occur:

The operational conditions again match the trip reset conditions of the protection function
The avatar receives a Trip Reset command

The Trip Reset command applies to all the protection functions enabled for a given avatar. However:

The Tripped state output is set to false only for those protection functions whose trip reset conditions are met.
The Tripped status output remains set to true for those protection functions whose trip reset conditions are still not met.

A tripped avatar has at least one tripped protection function (with a Tripped status set to true).

According to the same logic, an avatar that is not tripped has no tripped protection functions (no protection with a Tripped status set to true).

Tripped protection functions can be reset by the Auto-Reset function, via the controller or by using one of the digital tools.

NOTE: The Tripped status of all protection functions is maintained through a power cycle of the system with the exception of the Current Phase Reversal and Phase Configuration functions. For these functions, a power cycle resets the Tripped status (to not tripped).

The following table describes the Trip Reset Conditions, including hysteresis, for all avatars.

Trip reset conditions

Protection function	Trip reset conditions
Thermal Overload	Thermal capacity has decreased below Thermal Reset Threshold (no hysteresis).
Motor Overheat	Motor temperature has decreased below Motor Overheat Reset Threshold (no hysteresis).
Current Phase Unbalance	Current unbalance has decreased below Current Phase Unbalance Trip Level.
Current Phase Loss	Current unbalance has decreased below Current Phase Loss Trip Level.
Jam	Maximum phase current has decreased below Jam Trip Level.
Undercurrent	Average current has increased above Undercurrent Trip Level.
Long Start	Average current has decreased below 30% Ir (no hysteresis).
Overcurrent	Maximum phase current has decreased below Overcurrent Trip Level.
Stall	Maximum phase current has decreased below Stall Trip Level.
Ground Current	Ground current has decreased below Ground Current Trip Level.
Current Phase Reversal	Average current has decreased below 30% Ir (no hysteresis).
Phase Configuration	Average current has decreased below 30% Ir (no hysteresis).

Where indicated, protection functions apply a 5% hysteresis value to the trip reset conditions. This increases the stability of the protection functions’ behavior. The trip reset is only authorized when normal conditions and this extra 5% margin are recovered.

For instance, the Jam protection function triggers a trip when the maximum phase current exceeds the defined Jam trip level. The trip reset conditions are met when the maximum phase current decreases below the Jam trip level minus 5%.

Additionally, setting the Trip Enable parameter for a protection function to Disable meets the Trip reset condition for that protection function.

Hysteresis

NOTE: d = Hysteresis percentage