6.2Voltage Source Switch

The VOLTAGE SOURCE switch will disconnect all power from the unit when in the EXT position with no source connected to the front panel voltage and motor power inputs.

▲CAUTION: Do not reverse the ground and hot wires when connecting an external source. A 3 AG (F2) is installed to protect the relay from damage if these connections are accidentally reversed.

With the VOLTAGE SOURCE switch in the EXT position, the sensing and motor power circuits are connected to the VOLTAGE IN binding post on the front panel. The unit can be tested using an external 120 V rms source of proper polarity applied to these terminals. Testing can be accomplished by adjusting the amplitude of the external source.

M-2299 Application Guide

7.0Maintenance

Due to the nature of the circuitry in the M-2001 Tapchanger Control, field repair is not recommended. All units are fully calibrated at the factory prior to shipment; there is no need to recalibrate a unit prior to initial installation. In the event that a unit does not operate properly, it should be established that the problem is caused by a malfunction of the Tapchanger Control and not caused by an external fault or wiring error. Check for blown fuses on the Adapter Panel. If the Tapchanger Control is still not operating properly, set the AUTO/OFF/MANUAL switch on the Adapter Panel to MANUAL. Once this is accomplished, the Tapchanger Control can be disconnected and returned to Beckwith Electric. Pack the unit carefully (in the original carton if possible), assuring that there is adequate packing material to protect the contents.

NOTE: Any equipment returned for repair must be sent with transportation charges prepaid.The equipment must remain the property of the user.The warranty is void if the value of the unit is invoiced to Beckwith Electric at the time of return or if the unit is returned with transportation charges collect.

If under warranty, units will be repaired rapidly and returned at no cost and with return transportation paid if the fault is found to be due to workmanship or failure of material. If a unit is under warranty and express shipment for return of the repaired unit is requested, shipping charges will be billed at the current rate. If the fault is due to abuse or misuse, or if the unit is out of warranty, a modest charge will be made. Repair can normally be expected to take two weeks, plus shipping time. If faster service is required, it should be requested at the time of return.

NOTE: Adapter panels returned with only a blown fuse are not covered by warranty and a nominal repair charge will be made for replacement of the fuse. Please check the fuses before returning the adapter panel for repair in order to avoid unnecessary repair charges.

To help in analyzing the problem, a complete description of the malfunction and conditions leading to the failure should be included with the unit.

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