ABB SPAJ140C-CA

Details

1. Usage parameters

Power supply: The power supply circuit of this device adopts AC 220V power supply, which can adapt to fluctuations within a certain range and ensure stable operation under certain power supply conditions.

Current parameters: The current is 5A, and the zero-sequence current can be 1A or 5A according to the specific model, which can meet the protection requirements of different power systems, accurately detect and respond to current changes, and provide effective protection for power equipment.

Input voltage: In addition to AC220V power input, ABB SPAJ140C-CA also has a measurement input with an input voltage of 100V, which is used for voltage monitoring in power systems to obtain more information to evaluate overcurrent and ground fault protection.

2. Product function

Overcurrent protection function: Overcurrent/undercurrent protection is equipped with a three-phase low-set phase overcurrent device such as IDMT fixed or inverse time minimum time setting, or a three-phase high-set phase overcurrent device instantaneous or fixed characteristic setting. When the phase current exceeds the set starting current, the overcurrent protection device sends a start signal after a certain preset time, and takes action according to the set action time or calculated action time, effectively protecting the power equipment from damage by large current.

Ground fault protection function: ABB SPAJ140C-CA is equipped with a low-level ground fault device with definite time or inverse time characteristics, and a high-level ground fault device with instantaneous or definite time action function. When the fault current exceeds the selected starting current, the ground fault device starts and sends a signal to protect the radial feeder from short circuit and ground fault according to the grounding mode, resistance grounding or impedance grounding.

Built-in circuit breaker fault protection: When the circuit breaker fails, SPAJ140C-CA can quickly detect, generate signals and take possible protection measures to prevent the scope of the fault from expanding, thereby improving the reliability of the power system.

Relay output: SPAJ140C-CA is equipped with two heavy-duty relays and 4 relay outputs for signal control. The output relay matrix routes the start or trip signal of the protection logic to the necessary output relays, executing the control and signal output of the circuit breaker or other equipment.

Display and communication functions: SPAJ140C-CA has the function of reading and writing set values through local display and front panel buttons or serial interface and upper system fiber optic bus. In addition, it is also able to display measured quantities, set values and data recorded during faults or parameter settings, monitoring and diagnosis at the convenience of the user.

Self-monitoring: At present, SPAJ140C-CA can automatically monitor the operation of its electronic equipment and microchips to determine that the equipment is in good working condition. Once a fault occurs, it can dynamically notify, making the system operation more efficient and reliable.

3. Scope of application.

Power system protection: ABB SPAJ140C-CA is widely used in power systems of various voltage levels to protect power equipment from overcurrent and grounding faults, ensure the safe and stable operation of the power system, and avoid power outages or equipment damage caused by faults.

Industrial power distribution system: Protect various electrical equipment in the industrial power distribution system of manufacturing and mining projects, ensure continuous streamlining of process flows, and reduce production losses caused by electrical faults.

Commercial building power supply system: ABB SPAJ140C-CA can effectively protect transformers, distribution cabinets and other equipment in the power supply systems of shopping malls and office buildings, improve power supply quality, and provide reliable power guarantee for commercial operations.