The ABB 2TAZ220301R2504 is the specific material ordering code for a control power supply module (DC/DC converter). It is a single-phase, switched-mode power supply (SMPS) designed to provide a stable, isolated, and regulated DC voltage for powering sensitive electronic control and protection equipment within electrical panels and switchgear.

The ABB GSE203 AC is a three-pole (3P) miniature circuit breaker (MCB) from ABB's System Pro M compact GSE series. It is designed for the protection of three-phase electrical circuits against overloads and short-circuits.

The ABB GSE201L 1P+N 16A is a single-pole with neutral (SPN), single-module width miniature circuit breaker (MCB) from ABB's System Pro M compact GSE series. It is designed for the final circuit protection of single-phase electrical installations, providing combined protection against overloads and short-circuits for both the phase and neutral conductors (though the neutral pole may have a different breaking capacity or be unbreakable in some designs).

The ABB GSH201 AC-C20/0.03 is a specific configuration of a high-performance AC power contactor (GSH201) from ABB's G-H series, equipped with a front-mounted rotary handle (C20) and an integrated, very low-current (30mA) fuse for its control coil circuit.

The ABB HCFFAEAGABC2BAA11E is a multi-channel, universal fan coil unit (FCU) controller and room thermostat from the ABB i-bus® KNX product family. This integrated device is designed for the precise and energy-efficient control of HVAC (Heating, Ventilation, and Air Conditioning) terminal units, specifically 2-pipe or 4-pipe fan coil units, through the KNX building automation system.

The ABB HCFKAEADABC2BNA11E is a modular, multi-channel actuator from the ABB i-bus® KNX product family. Specifically, it is a lighting and shutter/blind control actuator with multiple independent channels and a built-in logic unit, designed for integration into KNX/EIB building automation systems.

The ABB RET615E-1G is a high-performance, multifunctional numerical protection relay from ABB's Relion® 615 series, specifically designed and optimized for the protection, control, and monitoring of two-winding power transformers. The suffix codes denote specific hardware configurations: -E indicates a wide-range power supply, and -1G defines the package of communication and I/O modules.

The ABB REF615C-D is a specific hardware variant of the REF615 numerical feeder protection relay from ABB's Relion® 615 series. This relay is designed for reliable feeder protection, control, and monitoring in medium-voltage distribution networks, particularly in systems utilizing standard DC control panels.

The ABB REF615C-E is a specific hardware variant of the REF615 numerical feeder protection and control relay from ABB's Relion® 615 series. The suffix -E is a critical identifier within ABB's ordering system, typically denoting a device with a wide-range auxiliary power supply and enhanced environmental specifications.

The ABB REF615 is a compact, versatile, and cost-effective numerical feeder protection and control relay from ABB's Relion® 615 series. It is a member of ABB's renowned protection device family, designed specifically for the protection, control, measurement, and monitoring of secondary distribution networks, including feeders, transformers, and capacitor banks in utility substations and industrial power systems.