Disconnector operating-torque alarm interface

What it represents

Receives the selected drive monitor's declared abnormal operating condition. Disconnector and earthing references identify different mechanical constructions and connection duties within a yard. The primary diagram shows which conductors are joined or earthed; the equipment drawing explains how its contacts and supports move.

In a switchyard bay, a bus selector can use a different physical construction from a line disconnector. Each device still needs an identified operating mechanism, position indication and interlocking interface. For this reference, the drawing identifies “Mechanism condition monitor” at the input and “Drive-condition alarm” at the output. The alarm is a diagnostic input rather than a diagnosis.

The construction name does not establish load-breaking capability, short-circuit making duty or operating permission. Verify these properties in the selected equipment data and the station interlocking scheme. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation.

How to read it

• Start at the named input: Mechanism condition monitor. Identify its source device or document and the state represented on the drawing.
• Follow the named output: Drive-condition alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.
• The alarm is a diagnostic input rather than a diagnosis.
• The construction name does not establish load-breaking capability, short-circuit making duty or operating permission. Verify these properties in the selected equipment data and the station interlocking scheme.

Information to show or reference

• Label the source and connection reference for mechanism condition monitor.
• Identify the destination and defined state of drive-condition alarm.
• Record the equipment or control-document revision supporting this functional block.
• Check this application limit in the project design: The alarm is a diagnostic input rather than a diagnosis.

Sources you can follow

These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.

About this graphic

This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.

SVG and DXF downloads contain this original artwork. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.