User Manual Toshiba Remote Starter Vf010H05 [14/106 Pages]

Toshiba remote starter VF010H05

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JKSSS+ Series - 8

JKSSS+ Series 2.3 - 4.2KV

1.6 General Protection

The soft starter is provided with a built-in motor protection relay that can be

programmed for primary protection of the motor/load system. Operation of the soft

starter can be divided into 4 modes; Ready, Start, Run and Stop.

Ready Mode: In this mode, control and line power are applied and the starter is

ready for a start command. Protection during this mode includes the monitoring

of current for leakage through multiple shorted SCRs or welded contacts on the

Bypass Contactor. Other protection features in effect are:

· Starter Temperature

· Shorted SCR

· Phase Reversal (if enabled)

· Line Frequency Trip Window

· External Input Faults

Note: The “Programming Mode” can only be entered from the Ready Mode.

During programming, all protection features and start command are disabled.

Start Mode: These additional protection functions are enabled when the soft

starter receives a valid Start command:

· Phase Reversal (if enabled)

· Start Curve

· Acceleration Timer

· Phase Imbalance

· Short Circuit / Load Pre-check (Toe-in-the-Water)

· Ground Fault (Optional)

· External Input Faults

· Accumulated Starting FLA Units (I

t Protection)

· Overload Protection

· Thermal Capacity

Note: Shorted SCR and Shunt Trip protection are no longer in effect once the

soft starter goes into the Start Mode.

Run Mode: The soft starter enters the Run Mode when it reaches full output

voltage and the motor current drops below the FLA setting (motor nameplate

FLA plus service factor) for a predetermined period of time. During the Run Mode

these additional protection features are enabled:

· Running Overload Curve

· Phase Loss

· Under Current / Load Loss

· Over Current / Electronic Shear Pin (Jam protection)

· External Input Faults

Stop Mode: Once a Stop command has been given, the protection features

change depending on which Stop Mode is selected.

· Decel Mode: Retains all protection features of the Run Mode. At the end of

Decel, the motor will be stopped and the protection features change as

indicated below.

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