ABB SPAJ140

ABB SPAJ140 is a combined overcurrent and earth fault relay within the ABB SPACOM series, specifically designed for power systems. It delivers flexible overcurrent and earth fault protection functions, with the core objective of ensuring the safe operation of power systems through rapid response and precise control. It is suitable for various industrial scenarios.

Parameters

Operating Environment:

Operating temperature range: -20°C to +85°C (some models support -40°C to +70°C).

Relative humidity: ≤90% (non-condensing).

Electrical Parameters:

Rated current: 0.1-0.8In (In is the rated current), maximum operating current 1200A.

Working voltage: 480V AC (some models support 220-380V AC).

Rated frequency: 50Hz or 60Hz.

Response Characteristics:

Action time: 0.98ms (delayed response).

Action accuracy: ±2% or ±25ms (time), ±3% (current).

Reset time: 40ms.

Product Features

Multi-stage Protection Functions:

Overcurrent protection: Supports single-phase, two-phase, or three-phase overcurrent protection with adjustable action time (definite time or inverse time).

Earth fault protection: Provides low/high setting earth fault protection, suitable for solidly earthed, resistive earthed, or impedance earthed systems.

Circuit breaker failure protection: Built-in circuit breaker failure protection circuit to ensure rapid tripping during faults.

Intelligence and Flexibility:

Self-check function: Built-in self-check system continuously monitors the operation status of electronic devices and microprocessors.

Remote communication: Supports protocols like Modbus RTU, IEC 60870-5-103, and IEC 61850 for easy integration into automation systems.

Local display: Equipped with a digital display to show real-time measured values, setting values, and fault records.

Reliabil

IP protection rating: IP20 (some models IP30), dust-proof design.

Wide temperature adaptability: Suitable for extreme environments (e.g., industrial automation, energy management).

Structure and Composition

Modular Design:

Includes input/output modules, communication interfaces, and a relay matrix (two heavy-duty relays and four signal output relays).

Supports DIN rail mounting (some models).

Core Components:

Measurement unit: Real-time acquisition of parameters such as current, voltage, and frequency.

Control logic: Microprocessor-based intelligent algorithms for precise action judgment.

Output interface: Outputs tripping signals or control signals through the relay matrix.

Application Areas

Power Systems:

Suitable for user terminal substations, overhead lines, cable lines, and inlet/outlet cabinets with voltage levels of 10kV and below.

Provides rapid protection against grid short circuits and earth faults.

Industrial Automation:

Used in scenarios such as motor control, lighting control, and heating control.

Enables safety interlocking and fault protection in CNC machines and industrial robots (e.g., ABB IRB 140).

Installation and Maintenance

Installation Steps:

Power-off operation: Disconnect the power supply before installation to ensure safety.

Installation location: Recommended hidden embedded installation (some models).

Wiring requirements: Follow standard wiring specifications to ensure correct connection of power cables, control cables, and motor wires.

Maintenance Recommendations:

Regular inspection: Clean the device surface and check the tightness of wiring terminals.

Firmware update: Update firmware through the communication interface to optimize performance.

Fault diagnosis: Use the self-check function to troubleshoot anomalies and record fault codes.

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