ABB SPAA 341 C2 REV.A Feeder Protection

Technical Parameters of ABB SPAA 341 C2 REV.A Feeder Protection

1. General Information

The ABB SPAA 341 C2 REV.A is a dedicated feeder protection relay designed to safeguard electrical feeders in power distribution systems. It offers comprehensive protection, monitoring, and control functions to ensure the reliable and safe operation of feeders under various operating conditions.

2. Protection Functions

2.1 Overcurrent Protection

  • Instantaneous Overcurrent (I>>): It provides a rapid – acting instantaneous overcurrent protection element. The setting range for the pickup current is typically from [low current value, e.g., 0.1 times the rated current (In)] to [high current value, e.g., 20 times In]. This function trips the circuit breaker immediately when a high – magnitude fault current is detected, preventing equipment damage and minimizing the fault duration.
  • Time – Delayed Overcurrent (I>): The time – delayed overcurrent protection has an adjustable pickup current range similar to the instantaneous element. The time delay can be set in the range of [low time value, e.g., 0.05 s] to [high time value, e.g., 10 s]. It is used to protect against overloads and lower – magnitude faults, allowing for selective coordination with other protection devices in the system.
  • Earth Fault Protection (I0>): For earth fault detection, the relay can measure the zero – sequence current. The pickup current for earth fault protection ranges from [low zero – sequence current value, e.g., 0.01 times the rated zero – sequence current (I0n)] to [high zero – sequence current value, e.g., 10 times I0n]. The time delay can also be adjusted according to the system requirements.

2.2 Directional Overcurrent Protection (Optional)

  • When equipped with directional overcurrent protection, the relay can determine the direction of the fault current. It uses voltage and current measurements to identify whether the fault is in the forward or reverse direction with respect to the protected feeder. The pickup current and time delay settings are the same as for the non – directional overcurrent protection, but with the added directionality feature for more precise protection coordination in complex power networks.

3. Measurement Functions

  • Current Measurement: The relay can accurately measure the three – phase currents (Ia, Ib, Ic) and the zero – sequence current (I0). The measurement accuracy for current is typically within ±[specific percentage, e.g., 1%] of the full – scale value. This provides reliable data for protection decision – making and system monitoring.
  • Voltage Measurement (Optional): Some models of the SPAA 341 C2 REV.A can also measure the three – phase voltages (Va, Vb, Vc). The voltage measurement accuracy is within ±[specific percentage, e.g., 0.5%] of the full – scale value, allowing for additional protection functions such as under – voltage and over – voltage protection.

4. Communication and Interface Features

  • Communication Protocols: It supports standard communication protocols such as IEC 60870 – 5 – 103. This enables seamless integration with supervisory control and data acquisition (SCADA) systems, allowing for remote monitoring, control, and configuration of the relay.
  • Input/Output (I/O) Contacts: The relay is equipped with a number of programmable input and output contacts. The input contacts can be used for various purposes, such as connecting external signals for block functions or status indication. The output contacts are used to trip the circuit breaker, send alarm signals, or control other auxiliary devices. The number of I/O contacts varies depending on the specific model and configuration, but typically includes [number of input contacts, e.g., 4] input and [number of output contacts, e.g., 6] output contacts.

5. Performance and Environmental Specifications

  • Response Time: The response time of the protection functions is extremely fast. For overcurrent protection, the typical response time from fault detection to trip command issuance is less than [specific time, e.g., 30 ms]. This ensures rapid fault isolation and minimizes the impact on the power system.
  • Operating Temperature Range: The relay can operate in a wide temperature range, typically from – [lower temperature, e.g., 25°C] to + [higher temperature, e.g., 70°C]. This makes it suitable for installation in various indoor and outdoor environments, including areas with extreme temperature conditions.
  • Humidity: It is designed to withstand high humidity levels, with an operating humidity range of [specific humidity range, e.g., 5% – 95% non – condensing]. This ensures reliable performance even in humid climates or indoor environments with high moisture content.

6. Power Supply Requirements

  • Input Voltage Range: The SPAA 341 C2 REV.A can accept a wide range of input voltages, typically from [lower voltage, e.g., 85 V] to [higher voltage, e.g., 264 V] AC or DC, depending on the specific model and configuration. This flexibility in power supply input allows it to be integrated into different power systems with varying voltage levels.
  • Power Consumption: It has a relatively low power consumption, typically in the range of [specific power consumption value, e.g., less than 10 VA] under normal operating conditions. This helps to reduce the overall energy consumption of the power system and the associated operating costs.

In conclusion, the ABB SPAA 341 C2 REV.A feeder protection relay is a reliable and versatile device that offers a comprehensive set of protection, measurement, and communication functions to ensure the safe and efficient operation of electrical feeders in power distribution systems.

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