The ABB GSH204 AC-D40/0.03 is a 4-pole, 40A, Type AC, D-curve Residual Current Circuit Breaker with Overcurrent Protection (RCBO). This advanced protective device is engineered for three-phase four-wire circuits that supply equipment with extremely high inrush (starting) currents. It integrates complete protection against overloads, short-circuits, and earth leakage currents (30mA) into a single compact unit. The defining feature is its D-curve overcurrent characteristic, which features a very high magnetic trip threshold (10-20 times the rated current) to withstand the intense but brief startup surges of motors, transformers, and other inductive loads without nuisance tripping, while still providing critical life-saving protection against electric shock.

The ABB GSH204 AC-D32/0.03 is a 4-pole, 32A, Type AC, D-curve Residual Current Circuit Breaker with Overcurrent Protection (RCBO). This specialized device is engineered for protecting three-phase four-wire circuits that supply loads with very high inrush (starting) currents. It combines complete protection against overloads, short-circuits, and earth leakage faults in one unit. The D-curve overcurrent characteristic provides a high magnetic trip threshold, making it immune to nuisance tripping from the brief but intense startup surges typical of motors, transformers, and certain lighting systems, while the 30mA Type AC RCD component ensures critical protection against electric shock.

The ABB GSH204 AC-D10/0.03 is a 4-pole, 10A, Type AC, D-curve Residual Current Circuit Breaker with Overcurrent Protection (RCBO). This is a specialized protective device designed for three-phase circuits (with neutral) that power loads with very high inrush currents, such as transformers, certain discharge lighting, or specific types of motor starting circuits. It integrates comprehensive protection against overloads, short-circuits, and earth leakage currents in a single unit. The key differentiator is its D-curve overcurrent characteristic, which provides a higher magnetic trip threshold to tolerate high startup surges without nuisance tripping, while its 30mA Type AC RCD component ensures protection against electric shock.

The ABB GSH202A-C63/0.03 is a 2-pole, 63A, Type A, C-curve Residual Current Circuit Breaker with Overcurrent Protection (RCBO). This integrated protective device is designed for single-phase circuits (or two-phase circuits) where the highest level of protection is required. It combines the functions of a miniature circuit breaker (MCB) for overload and short-circuit protection, and a residual current device (RCD) for earth leakage protection, all in one compact unit. The key feature is its Type A sensitivity, which detects both sinusoidal AC residual currents and pulsating DC residual currents, making it essential for protecting circuits feeding modern electronic equipment that contains rectifiers or switch-mode power supplies.

The ABB 2TAZ224201R2634 is a push button operator head with a green illuminated dome cap, designed for 22.5mm panel mounting holes. This operator combines a tactile push-button function with an integrated colored indicator light, all within a single, compact module. The green illumination provides clear visual feedback (e.g., "power on," "system ready," "cycle complete") at the point of operation. This is an operator module that must be paired with a compatible contact block (for the switch function) and/or a lamp holder base (for the light function) to form a complete electrical device.

The ABB GSH204 AC-S-C50/0.3 is a 4-pole, 50A, Type AC, C-curve, Selective ("S"-type) Residual Current Circuit Breaker with Overcurrent Protection (RCBO). This is a highly specialized and advanced protective device that combines the full functionality of an RCBO (overload, short-circuit, and earth leakage protection) with a built-in time-delayed trip characteristic for residual currents. The "S" (Selective) suffix indicates it incorporates a short time delay (typically 10-40 ms) before tripping on a residual current fault. This allows it to be used in a coordinated protection scheme with downstream instantaneous ("G"-general use) RCDs/RCBOs, ensuring that only the circuit closest to the fault trips, minimizing unnecessary power outages.

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.