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.

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

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

  • No insulation fault is detected.

  • Transient fault is detected.

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

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

  • Insulation fault is detected.

  • On first measurement after power cycle and on toroid disconnect.

  • The product is inoperative (detected by auto-test).

  • The auxiliary power supply is lost.

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

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

  • When the voltage signal is unavailable

  • Channel failure

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

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

  • Insulation fault is detected.

  • The product is inoperative (detected by auto-test).

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

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

  • Toroid disconnect

  • When the voltage signal is unavailable

  • Channel failure

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

  • No insulation fault is detected.

  • On first measurement after power cycle

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

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

  • The auxiliary power supply is lost.

  • Transient fault is detected.