Description
The ABB 216NG63A HESG441635R1/K HESG216877 is an Auxiliary DC Power Supply Unit designed for ABB REG216 digital protection and control systems. It provides isolated and regulated low-voltage DC power for electronic racks, protection modules, and control circuit boards used in power generation and industrial protection applications.
The 216NG63A belongs to the ABB 216NG6x auxiliary supply family. It is the high-voltage DC input version, designed to convert station battery supply into a stable 24V DC output. The unit supports parallel operation for redundancy and includes overload and short-circuit protection features.

216NG63A HESG441635R1 HESG216877/K
Product Specifications
| Parameter | Description |
|---|---|
| Brand | ABB |
| Model | 216NG63A |
| Part Number | HESG441635R1/K |
| Related Part Number | HESG216877 |
| Series | REG216 Digital Protection System |
| Product Name | Auxiliary DC Power Supply Unit |
| Product Type | DC/DC Power Supply Module |
| Function | Provides regulated auxiliary DC power for protection and control electronics |
| Input Voltage | 220/250 VDC class input |
| Output Voltage | 24 VDC |
| Output Power | 150 W |
| Output Current | Approx. 6 A |
| Protection Features | Short-circuit protection, overload protection |
| Redundancy | Supports parallel redundant operation |
| Isolation | Galvanically isolated DC conversion |
| Mounting Type | ABB rack-mounted module |
| System Compatibility | ABB REG216 / power protection systems |
| Place of Manufacture / Origin | Sweden |
| Product Status | Discontinued / Legacy Industrial Spare Part |
| Dimensions | Rack module format |
| Weight | Approx. 1 kg |
| Country of Origin | Sweden |
| Power Requirements | High-voltage station DC supply |
Key Features
✅ Original ABB REG216 auxiliary power supply module
✅ Converts station DC voltage to regulated 24V DC control power
✅ Designed for generator and electrical protection systems
✅ Supports redundant power configurations
✅ Provides overload and short-circuit protection
✅ Suitable for ABB legacy system maintenance and replacement
Applications
• Generator protection systems
• Power plant automation
• Substation protection equipment
• Turbine control cabinets
• Electrical protection and monitoring systems
• Industrial DCS power supply applications
Frequently Asked Questions
❓ Q: What is the ABB 216NG63A HESG441635R1/K used for?
A: It is an auxiliary DC power supply module used to provide stable 24V DC power for ABB protection and control system electronics.
❓ Q: What is the difference between 216NG61, 216NG62, and 216NG63?
A: These models are different input-voltage versions in the ABB 216NG6x auxiliary supply family. The 216NG63 is designed for higher DC station battery voltage applications, while 216NG61 and 216NG62 cover lower DC input ranges.
❓ Q: Is the 216NG63A a CPU or communication module?
A: No. Its primary function is an auxiliary DC power supply unit for ABB protection and control equipment.
❓ Q: Can two 216NG63A units be installed for redundancy?
A: Yes. The ABB 216NG6x auxiliary supply family supports parallel redundant operation to improve system availability.
❓ Q: Is ABB 216NG63A still manufactured?
A: It is considered a legacy ABB spare part and is mainly available through industrial automation spare-part suppliers.
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