7PA3032-1AA00 SIEMENS Fast-Acting Lockout Relay

Description

7PA3032-1AA00 SIEMENS Fast-Acting Lockout Relay

Product Dimensions：

Product Description (Detailed Explanation)

The 7PA3032-1AA00 is a single-phase trip circuit supervision relay. Its primary role is to detect any break or failure in the circuit breaker’s trip coil or wiring. It monitors the presence of voltage across the trip circuit in both the “Closed” and “Open” positions of the breaker.

This relay operates on a monostable switching principle and features bifurcated contacts for high reliability in low-current signaling. If the trip circuit becomes interrupted (e.g., due to a broken wire or loss of control voltage), the relay drops out, triggering an alarm signal to the control system. This specific model is configured for a 110/125 V DC auxiliary voltage and is typically supplied as a plug-in unit for flush-mounting sockets.

Product Parameters (Technical Specifications)

Product Advantages (Key Benefits)

• Continuous Security: Provides real-time monitoring of the most critical link in the protection chain—the trip circuit—preventing “blind” protection failures.

• Dual-State Monitoring: Capable of supervising the trip circuit regardless of whether the circuit breaker is in the open or closed position.

• High Contact Reliability: The use of bifurcated, positively driven contacts ensures that even small signaling currents are switched reliably over the life of the relay.

• Delayed Response: The 500ms response time is intentionally designed to prevent nuisance alarms during transient voltage dips or normal breaker operation.

• Modular Socket System: Designed to work with standard 7XP90 sockets, allowing for fast replacement without disturbing the cabinet wiring.

Precautions (Important Notes)

• Auxiliary Voltage Matching: Ensure the DC supply strictly matches the 110/125V rating. Applying 220V or 48V will result in immediate damage to the internal sensing coils.

• Mounting Socket: The relay unit (7PA3032-1AA00-0) usually requires a separate socket (7XP90) for installation. Verify if your order includes the socket or if it must be repurposed from the existing setup.

• Polarity Sensitivity: As a DC device, correct wiring polarity is essential for the internal logic to function. Refer to the device circuit diagram on the side of the housing.

• Lifecycle Note: As of early 2026, some variants of this series have reached “Product Cancellation” status. Ensure you are sourcing genuine spare parts or the designated successor modules for new installations.

Product Applications (Typical Use Cases)

• Substation Automation: Standard supervision for 110kV and 220kV transmission line circuit breakers.

• Industrial Power Plants: Monitoring trip circuits for large generator breakers and transformer primary switches.

• Medium Voltage Switchgear: Integrated into protection panels for motor and feeder protection.

• Critical Infrastructure: Used in data centers and hospital power systems where circuit breaker reliability is paramount for redundant power path switching.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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