AuCom CSXI-037 Podręcznik użytkownika - Strona 8

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TROUBLESHOOTING

Phase Imbalance Protection

The CSX

will trip on phase imbalance if the highest and lowest currents on the three phases vary by an

average of 30% for more than 3 seconds. Phase imbalance protection is not adjustable, and is only active

when the average motor current is 50% or more of the programmed motor FLC.

If the soft starter frequently trips on phase imbalance:



check that there is no imbalance on the mains voltage (on the input side of the soft starter)



insulation test the motor



move all input cables over one position (move L1 cable to L2, move L2 cable to L3, move L3 cable

to L1) to rule out a cabling fault

Supply Frequency Protection

The soft starter will trip on supply frequency if the frequency rises above 72 Hz or falls below 40 Hz for

more than five seconds while the soft starter is running. These trip points are not adjustable.

In pre-start, starting and stopping modes the high and low frequency limits both apply with no time delay.

A supply frequency trip will also occur if:



all three input phases are lost while the soft starter is running



all three input phases fall below 120 VAC at start or while the soft starter is running



the line contactor opens while running

Bypass Overload Protection

Bypass overload protection protects the soft starter from severe operating overloads while running. The

protection is not adjustable and has two components:



The soft starter will trip if it detects overcurrent at 600% of the programmed motor full load

current.



The soft starter models the temperature of the internal bypass relays and will trip if the

temperature exceeds the safe operating level.

If the trip occurs frequently, this indicates that the soft starter has not been selected correctly for the

application.

5.4

Reset

Trips can be cleared by pressing the Reset button on the soft starter, sending a Reset command from the

serial communications network, or by switching the control inputs.

To clear a trip via the control inputs, the soft starter requires a closed to open transition on the stop input

(02).



In three-wire control, use the external stop button to momentarily open the stop input (open

A1-02).



In two-wire control, if the soft starter tripped with a start signal present, remove the start signal

(open A1 to 01, 02).



In two wire control, if the CSXi tripped with no start signal present (eg CSX

trip), apply then remove the start signal (close then reopen A1 to 01, 02).

The Reset button is located on the front of the unit, above the adjustment switches.

The soft starter will trip again immediately if the cause of the trip still exists.

Page 8

CSXi

motor thermistor

710-02408-00H