Description
ABB SPCJ4D34-AA Mainboard PCB Unit Rev P
SPCJ4D34-AA is a motor protection relay module produced by ABB, belonging to ABB’s low-voltage protection and control product line, originating from Sweden.
The core positioning is for comprehensive protection of electric motors, replacing early models such as SPCJ 10, which can monitor and protect against abnormal states such as overload, short circuit, ground fault, imbalance, and locked rotor during motor operation.
ABB SPCJ4D34-AA Mainboard PCB Unit Rev P
In terms of main functions, the first is current monitoring, which supports real-time acquisition of three-phase currents I1, I2, I3, as well as monitoring of ground fault current Io and residual fault current Irf. The second is thermal overload protection, which calculates thermal accumulation through the θ/int parameter and simulates the temperature rise curve of the motor winding. The third is power monitoring, which can display the power percentage p [%] and is used to determine the load status of the motor. The fourth is programmable protection logic, with built-in sgr1 and sgr2 configurable protection curves, supporting trip trip output, reset mode setting, Δ i imbalance protection, ∑ t si cumulative running time statistics and other functions. The fifth is fault recording, which supports the accumulation and query of data such as action frequency and trip frequency.
In terms of key parameters, the net weight of the module is about 1.2 kilograms, and the customs tariff code is 85389091. The configuration tool is ABB specific setting software, which can complete all parameter tuning through panel buttons or software. This module corresponds to ABB’s official document number 1MRS751939-MUM, with the earliest version released in 2000 and subsequent updates and iterations.
It should be noted that some suppliers in the market label SPCJ4D34-AA as a PLC controller module or digital output module (such as DO620), which does not comply with the official ABB document definition. According to ABB’s official technical documentation, this model is clearly designated as a motor protection relay module, mainly used in motor control cabinets, power distribution systems, industrial drive equipment, and other scenarios. It is widely used in industries such as power, petrochemicals, water treatment, and mining. If you are doing project selection or fault replacement, it is recommended to follow ABB’s official document 1MRS751939-MUM for model confirmation.
