7EN02-0423-00

Insulation alarm relay (Ins. Al. Relay)

You can set the insulation alarm relay mode depending on the status of insulation.

The allowed values for this parameter are FS and Std.. The default value is FS.

NOTE: The preventive insulation alarm relay activation and deactivation and insulation alarm relay activation and deactivation are based on the following default states as per the configured mode. The device allows assigning various state to either of the relays (Preventive insulation alarm relay and Insulation alarm relay). See Relay assignment.

When the insulation alarm relay is configured in failsafe (FS) mode:

  • The insulation alarm relay is activated, that is, energized, in the following case:

  • The insulation alarm relay is deactivated, that is, de-energized, in the following cases:

    • First measurement

    • Insulation fault is detected.

    • Insulation fault is detected and acknowledged (if Menu > Settings > I/O Config. > Ack. Al. Relay is set to OFF). (See Insulation alarm relay acknowledgement (Ack Al. Relay))

    • Corrected insulation fault signal: the insulation fault relay toggles for 3 seconds when an insulation fault is detected, acknowledged, and then corrected in the system. (See Corrected insulation fault signal (Corr. Flt. Signal))

    • When you trigger an auto-test with relays, the relay toggles for 3 seconds.(See Test with relays (Test w. Relays))

    • Injection is inhibited (if Menu > Settings > I/O Config. > Ack Inhibit is set to ON).

      (See Acknowledge inhibition (Ack Inhibit.))
    • The auxiliary power supply is lost.

    • Product error

      NOTE: Auto-test failure state is identified as product error.
    • System error

      NOTE:

      The following states are identified as system error:

      • Disconnected injection

      • Over voltage

      • Over capacitance

When the insulation alarm relay is configured in Standard (Std) mode:

  • The insulation alarm relay is activated, that is, energized, in the following case:

  • The insulation alarm relay is deactivated, that is, de-energized, in the following cases:

    • First measurement

    • No insulation fault is detected.

    • Insulation fault is detected and acknowledged (if Menu > Settings > I/O Config. > Ack. Al. Relay is set to ON). (See Insulation alarm relay acknowledgement (Ack Al. Relay))

    • Transient fault is detected.

    • The auxiliary power supply is lost.

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