What is the state of the ATS48 Fault Relay under various conditions?

Issue:
Understanding the behavior of the fault relay (R1) under different operating conditions

Resolution:

Relay R1 Functionality Overview:

• The fault relay operates on terminals R1A–R1C.
• To enable fault relay functionality, set parameter r1 = r1F in Menu IO.
• The relay is a normally open contact.

Relay Behavior by Condition:

• When control power is not applied to terminals CL1–CL2, the relay contact is open.
• When control power is applied and no fault is present, the relay contact is closed.
• When the ATS48 detects a fault, the relay contact is open.

Special Case – Automatic Restart Enabled:

If Automatic Restart is active (ArS = ON in Menu PrO), the relay behaves differently:

• During auto-restart attempts, the R1 contact remains closed.
• If the fault persists after all restart attempts, the R1 contact will open

If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:

Frequently Asked Questions - Schneider Electric (se.com)

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Released for: Schneider Electric Canada