ABB UC Podręcznik użytkownika - Strona 5

Przeglądaj online lub pobierz pdf Podręcznik użytkownika dla Urządzenia przemysłowe ABB UC. ABB UC 12 stron. On-load tap-changers

Operation

– The position indicator shows the actual tap-position.

– The draghands show the max. and min. tap-position between which the on-load tap-changer has

been working since last resetting.

– For BUE: The tap-change in progress indicator shows POSITION in service position, RAISE when

operating in a raise operation and LOWER when operating in a lower operation.

– For BUL: The tap-change in progress indicator shows RED during operation and WHITE when the

on-load tap-changer is in service position.

– For resetting of the emergency stop turn the knob clockwise and switch on the motor protective

switch.

– The LOCAL/REMOTE switch. In position LOCAL the on-load tap-changer can be operated by the

RAISE/LOWER switch. In position LOCAL remote operation is rendered impossible. In position

REMOTE the on-load tap-changer is operated from the control room or by a voltage regulator.

Local operation is not possible in remote position.

– In case of a failure in power supply for the motor-drive mechanism it is possible to handcrank the

on-load tap-changer. Put the handcrank on the shaft. Make sure it has entered the slot in the shaft.

Crank in the desired direction as per the information plate above the shaft. The number of turns for

one step is also shown on the plate. When the handcrank is inserted all electrical operations are

rendered impossible. Continue cranking until the tap-changer in progress indicator shows POSI-

TION for BUE or white colour for BUL.

The handcrank must not be inserted during electrical operation.

If the on-load tap-changer is not in the exact position and the handcrank is pulled out, the motor-drive

mechanism will start and go to the exact position if the power supply is on.

– Thermostat for extra heater (option). We recommend a setting at +5 °C.

– Hygrostat for extra heater (option). We recommend a setting at approximately 60 %.

– Outlet (option) with earth fault protector.

Normally the on-load tap-changer is controlled by a voltage regulator and no manual operation of the

on-load tap-changer and the motor-drive mechanism is needed.

If a failure in power supply occurs during operation, the operation will be completed when the power

returns.

WARNING