Description
216NG63A HESG441635R1 ABB MODULE
ABB 216NG63A (HESG441635R1) Auxiliary DC Power Supply Unit Overview
Brand Background
ABB is a global technology leader in electrification, industrial automation, motion, and robotics. Within large-scale power generation, electrical transmission networks, and heavy process industries, ABB’s specialized auxiliary power and control hardware are engineered for maximum reliability, high operational safety, and long-term stability across demanding industrial environments worldwide.

216NG63A HESG441635R1 ABB MODULE
Model Overview: 216NG63A (Part Number: HESG441635R1)
The ABB 216NG63A (Ordering / Catalog Number: HESG441635R1, also associated with part variant HESG216877K) is a high-performance Auxiliary DC Power Supply Unit designed specifically for REG 216 generator protection and heavy industrial control system architectures.
Serving as a reliable power conversion and distribution node, the 216NG63A unit is engineered to accept wide-range DC voltage inputs and deliver a stable, regulated 24V DC output power supply. It features built-in protective mechanisms and supports parallel redundant configurations to ensure uninterrupted power delivery to critical protection relays and automation controllers.
Key Technical Specifications and Parameters
- Manufacturer: ABB
* Model Name / Designation: 216NG63A
* Part / Catalog Number: HESG441635R1 (Associated Code: HESG216877K)
* Product Type: Auxiliary DC Power Supply Unit / Power Controller Module
* Input Voltage Range: Wide-range DC input version (-36 V DC to +312 V DC)
* Output Voltage: Regulated 24 V DC
* Output Power Rating: 150 W
* Protection Features: Integrated short-circuit and overload protection outputs
* System Redundancy: Supports parallel connection for rating expansion and dual-output parallel redundancy
* Physical Dimensions: Width: 53 mm, Height: 125 mm, Depth / Length: 260 mm (occupies standard modular rack space requirements)
Operating Industries
The ABB 216NG63A power supply unit is deployed across mission-critical energy, utility, and heavy processing sectors requiring high-availability DC power:
- Power Generation & Utilities: Thermal power stations, hydroelectric facilities, nuclear plants, and generator protection systems (REG 216 series).
* Electrical Transmission & Distribution: High-voltage substations, grid interconnection nodes, and switchyard control systems.
* Oil, Gas & Petrochemicals: Onshore refining facilities, pipeline compressor stations, and continuous chemical processing plants.
* Heavy Industrial Automation: Large-scale manufacturing plants requiring dependable, isolated DC control power architectures.
Common Usage Scenarios
1. Generator Protection System Power Supply
Providing stable, isolated 24V DC auxiliary power to REG 216 protection relays and associated control electronics to ensure uninterrupted grid monitoring.
2. Redundant Industrial Control Power Distribution
Configuring multiple units in parallel redundancy to eliminate single points of failure within mission-critical automation control cabinets.
3. Wide-Range DC Voltage Conversion
Stepping down fluctuating or high-voltage substation DC bus lines into clean, regulated low-voltage power for sensitive microelectronic logic cards.
4. Control Panel Maintenance and Retrofits
Serving as a direct replacement power supply unit during routine cabinet servicing, hardware overhauls, or legacy power system upgrades.

