Toshiba HV6CS-MLD During Maintenance/Inspections, Types of Maintenance and Inspection Work

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4)Corrective actions or adjustments

5)Date of work

6.1 During Maintenance/Inspections

Before inspecting the electrical circuits, take the following measures to prevent electric shock:

1)After opening circuit for the VCB, open the disconnect switch on the power source side to place the main circuit and control circuits of the VCB in no-voltage status.

2)Lock the disconnect switch to prevent operation and label it with an "INSPECTION IN PROGRESS" tag.

3)Using a voltage detector, check to make sure that the circuits are in no-voltage status and ground the necessary circuits.

Discharge the residual charge from capacitors and cables before grounding. Space heaters, resistors and other units will remain hot even after they have been turned off. Install a protective cover temporarily, or wait until after the units have cooled to perform the inspection. To ensure safety, remove the ground line after the inspection is complete and return the equipment to its previous status.

6.2 Types of Maintenance and Inspection Work

Receiving inspection

A visual inspection for damage, deformation, missing parts and switching status (manual) to make sure that the product is in the same status as when it was shipped.

Patrol inspection

An inspection performed during patrols to check for abnormal noise or odor and see if there is anything wrong with the equipment during operation.

Periodic inspection

The equipment is shut off and a check made of the operation of the mechanism to make sure there is nothing wrong. The lubrication status of sliding and rotating parts is also checked and the mechanism is lubricated if needed.

Unscheduled inspection

Inspections that are implemented as required.

6.3 Inspection Frequency

The inspection frequency and points to be inspected will differ depending on the status of use, frequency of switching, the size of the breaking current and other factors. In general, inspections should be implemented at the intervals shown in the table below.

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Contents HV6CS-MLD Page Important Notice About This Manual Contacting TIC’s Customer Support Center Table of Contents General Safety Information Safety Alert SymbolEquipment Warning Labels Equipment Inspection Connecting and disconnecting the main circuit Operating the VCBInstallation location During UseSpecial environmental conditions Applicable standards pertaining to switching surges Part Names Drawout Type Circuit BreakerFrom Receipt to Storage Receipt and UnpackingTransport Hoisting the Circuit BreakerDrawout Cell Lifting the Drawout CellStorage Installation Mounting the Drawout CellMounting in the panel Place the VCB on the lifter Location of VCB holding pin with chain Closing the Circuit OperationManual Operation For Motorized Spring-operated VCBsWhen the spring is taut Perform the step shown in Figure Opening the Circuit Electrical Operation Control Circuit Motorized OperationPlug Installed in UV Trip Device Undervoltage TripPage Maintenance/Inspections Maintenance RecordDuring Maintenance/Inspections Types of Maintenance and Inspection WorkInspection Frequency Periodic Inspection Checkpoints Vacuum Check Location Inspection Criteria Disposition Remarks MethodPrecautions Test Procedure Dielectric Breakdown Characteristics Page Page Toshiba

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