The ABB GSH204 AC-C63/0.03 is a 4-pole, 63A, Type AC, C-curve Residual Current Circuit Breaker with Overcurrent Protection (RCBO). This is a combined protection device that integrates the functions of a miniature circuit breaker (MCB) and a residual current device (RCD) into a single unit. It provides comprehensive protection for three-phase circuits (with neutral) against: 1) overloads, 2) short-circuits, and 3) earth leakage currents that could cause electric shock or fire. The "C" curve indicates its magnetic tripping characteristic for short-circuit protection, suitable for circuits with moderate inrush currents.

The ABB GSH204 AC 4P is a four-pole, Type AC, Residual Current Circuit Breaker (RCCB) from the ABB System PRO M compact® (GSH200 series). This device is designed to provide life-saving protection against electric shock and fire hazards caused by earth leakage currents in three-phase electrical installations that include a neutral conductor. It monitors the vector sum of the currents in all live conductors (L1, L2, L3, N) and instantly trips to disconnect the entire circuit if an imbalance (residual current) is detected, indicating a leakage to earth. The "AC" type signifies sensitivity to sinusoidal alternating residual currents only.

The ABB SH203-NA ARVP is a specialized, 3-pole miniature circuit breaker (MCB) with a specific auxiliary function and high interrupting capacity, as indicated by the combined suffixes "-NA" and "ARVP". This MCB is designed for three-phase circuit protection in commercial and industrial applications where both enhanced short-circuit breaking performance and a remote tripping/status signaling capability are required. The "ARVP" suffix typically denotes that the breaker is factory-equipped with a specific auxiliary switch or alarm contact module. It provides standard overload and short-circuit protection while offering a remote electrical signal for control or monitoring purposes.

The ABB 6197/12-101-500 UD/S 4.210.2 is a high-precision, single-phase AC voltage transducer (signal conditioner) from ABB's instrumentation product line (historically part of the UD series). This device provides galvanic isolation, scaling, and conversion of a high AC voltage input into a standardized, low-level DC analog output signal suitable for safe connection to monitoring, control, or data acquisition systems (e.g., PLCs, SCADA, panel meters, recorders). The model suffix indicates a specific input and output configuration, making it a dedicated tool for accurate electrical parameter measurement.

The ABB 2TAM200000R1410 is a universal mounting bracket and hardware kit designed for assembling and mounting ABB's industrial operator interface modules (such as pushbuttons, selector switches, and pilot lights) onto panels, enclosures, or machinery. This is not an electrical device itself, but a critical mechanical accessory that provides a standardized and secure mounting frame. It allows multiple devices (typically from ABB's 22.5mm diameter product family) to be grouped together neatly in rows or blocks, ensuring proper alignment, spacing, and a professional appearance. The "R1410" suffix indicates the specific configuration of the kit.

The ABB SH201-NA 2P 80A is a specialized, 2-pole, 80A miniature circuit breaker (MCB) with a specific interrupting characteristic or high breaking capacity, likely denoted by the "-NA" suffix. This MCB is designed for applications requiring a robust protective device capable of handling higher prospective fault currents or specific installation requirements. It provides reliable overload and short-circuit protection for single-phase circuits (Phase + Neutral) or two-phase circuits with high current demands, commonly found in main distribution panels, large appliance feeds, or commercial/industrial sub-circuits.

The ABB OVR T2-T3 3N 20-275 P QS is a Type 2 Surge Protective Device (SPD), also known as a secondary surge arrester or distribution-level SPD. It is designed for installation in low-voltage three-phase electrical distribution boards with a neutral conductor (3N). Its primary function is to protect sensitive electrical and electronic equipment connected to the system from the damaging effects of indirect lightning strikes and switching overvoltages that propagate through the power network. This SPD provides a high level of protection (Up / residual voltage) by safely diverting surge currents to ground.

The ABB 6197/15-101-500 UD/S 4.600.2 is a compact, high-precision, electronic voltage transducer (VT) or signal conditioner. This device belongs to ABB's extensive range of measurement and instrumentation products (historically part of the E, UD, or DIN-A-MITE series). Its primary function is to accurately isolate, scale, and convert a high AC voltage input into a standardized, low-level, safe, and proportional analog output signal. The output is typically a DC current (e.g., 4-20mA) or voltage (e.g., 0-10V) that can be safely wired to monitoring, control, or data acquisition systems like PLCs, SCADA, or panel meters.

The ABB MS116-1.6 is a bimetallic, direct-heated, fixed-setting thermal overload relay designed to protect three-phase AC motors from damage caused by sustained overloads and phase loss (under certain conditions). It is a robust, traditional electromechanical protective device. The "1.6" indicates its maximum adjustable current setting range, which is 1.6 Amperes. It is installed in series with the motor power circuit and operates by sensing the heat generated by the motor current passing through its internal bimetal strips. When an overload condition persists long enough to cause excessive heating, the relay trips, opening its normally closed (NC) auxiliary contact to interrupt the control circuit and de-energize the motor contactor.

The ABB 2P40A50A63A is a 2-pole, 40A, "A" characteristic Miniature Circuit Breaker (MCB) designed for final distribution circuits. This MCB provides reliable protection against overloads and short-circuits for electrical cables and equipment in residential, commercial, and light-industrial installations. The "A" tripping characteristic is a specialized curve that provides a very fast magnetic trip, designed specifically for protecting long cable runs, circuits with semiconductors, or highly sensitive equipment where even a moderate overcurrent must be interrupted extremely quickly to prevent damage or fire risk.