Application Scenarios:

In a continuous chemical processing plant, a lightning strike on a nearby power line causes a momentary but complete loss of AC mains power to a section of the facility. The uninterruptible power supply (UPS) system for the control room has a 5-millisecond transfer time to its batteries. While this is fast, a sensitive DCS controller or communication module could still experience a brownout or reset during that brief switchover, potentially corrupting process data or halting control logic. The ABB SB822 3BSE018172R1 Rechargeable Battery Unit, installed adjacent to the SB512​ power supply in the controller rack, provides the critical milliseconds of holdup. It acts as a capacitor on steroids, instantly supplying DC power to the SB512‘s output stage the moment the AC input sags, covering the transfer gap of the upstream UPS flawlessly. This ensures the controller experiences zero power interruption, maintaining the stability of exothermic reactor controls or critical compressor anti-surge loops. It directly addresses the vulnerability to sub-cycle power dips that even UPS systems can’t always mitigate, safeguarding against process trips from the shortest of disturbances.

 

 

Parameter:

Main Parameter	Value / Description
Product Model​	SB822​ (Order Code: 3BSE018172R1)
Manufacturer​	ABB
Product Category​	DC Backup Battery Unit / Power Hold-up Module
Compatible System​	ABB IndustrialIT 800xA DCS, designed to work with power supply modules like the SB512.
Battery Technology​	Sealed lead-acid (SLA) or valve-regulated lead-acid (VRLA) rechargeable battery cells.
Nominal Voltage​	Typically 24V DC or 48V DC, matching the intermediate bus of the associated power supply.
Backup Capacity​	Provides ride-through power for a defined duration (e.g., 5-20 minutes) at a specified load.
Primary Function​	Maintains the DC output of the main power supply during brief AC input failure or brownout.
Charging Circuit​	Integrated smart charger with float/trickle charge to maintain battery health and prevent overcharge.
Status Monitoring​	Provides battery health and status signals (e.g., “Battery Low”, “Charging”, “Fault”) to the host system.
Form Factor​	Module designed to mount in an 800xA system rack, often adjacent to the main power supply.
Communication​	May provide dry contact signals or communicate status to the rack management system for alarm reporting.
Expected Service Life​	Typically 3-5 years under float charge, depending on environmental conditions and discharge cycles.

 

 

Technical Principles and Innovative Values:

The ABB SB822 3BSE018172R1​ is an intelligent energy buffer, not just a simple battery pack.

Innovation Point 1: Seamless, Zero-Transition Power Bridging:​ The core innovation is its electrical integration with the main SB512​ (or similar) power supply. The battery is connected to the supply’s internal high-voltage DC bus. When AC input is present, the battery is trickle-charged. The instant the AC input drops below a threshold, the circuit design allows the battery to immediatelyand seamlesslybegin supplying the DC-DC converter stage of the power supply. There is absolutely no switching delay, relay action, or break in the output waveform. This provides a “no-break” transition that is transparent to the connected controllers and I/O, a critical requirement for maintaining the state of high-speed control loops and communication sessions.