Master Lock XR20 Manual de servicio descargar pdf (Pagina 109)

7.3.2.1 Over Current Protection

Over current protection should only be calibrated after consultation with the factory.

Gross misadjustment can cause chopper and inverter failure.

Place a dc voltmeter between test point TP6 (positive) and test point TP7 (negative). With only

the control power applied, adjust potentiometer P1 to 6.00 V.

7.3.2.2 Under Voltage Protection

Under voltage protection should only be calibrated after consultation with the factory.

Gross misadjustment can cause chopper and inverter failure.

Connect the power supply to an adjustable ac source and connect an ac voltmeter to monitor the

voltage applied to the input terminals. Tests can be performed under no load conditions. Set the

ac source to rated voltage. Turn the control power, press the start switch, and a adust the output

voltage to 10% full scale output. Decrease the ac source to a value between 75% to 82% of rated

voltage. Adjust potentiometer P2 until the output drops to zero; the transition will be abrupt.

Decrease the ac source to a value between 72% to 79% of rated voltage. The main contactor

should turn off.

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Master Lock XR20 Manual de servicio Pagina 109