ABB SAFT111POW Power Supply Module – Replacement for REF615, REL615, RED615 Relays
Description
The ABB SAFT111POW is a switching mode power supply(SMPS)module engineered to convert DC control power(typically 24 V,48 V,or 110 V)into stable,regulated low-voltage DC outputs required by the Relion 615 series protection relays.It ensures the relay’s microprocessor,communication interfaces,analog measurement circuits,and HMI operate reliably even under fluctuating input voltage conditions.
This module is typically installed inside the relay’s chassis or mounting base and is a replaceable field component,allowing for easy maintenance without replacing the entire relay unit.It supports redundant power input configurations in critical applications,enhancing system availability.
Application Scenarios
At a water treatment plant in Sweden,a critical 6.6 kV motor feeding raw water pumps was protected by an ABB REF615 relay.During a routine inspection,technicians noticed the relay’s HMI was flickering and event logs were being lost—indicative of unstable power.Diagnostics revealed the internal power supply had degraded due to prolonged exposure to voltage transients on the 48 VDC control bus.The plant replaced the faulty unit with a new ABB SAFT111POW power module.After installation,the relay operated flawlessly,maintaining continuous monitoring and protection.During a subsequent grid disturbance,the relay successfully tripped the motor within 25 ms,preventing equipment damage.The SAFT111POW restored confidence in the protection system’s reliability,proving that even the most advanced relay depends on a robust power foundation.
Parameter
Parameter Value/Description
Model SAFT111POW
Manufacturer ABB
Product Type Switching Mode Power Supply(SMPS)
Input Voltage 24–48 VDC(Typical Range:18–72 VDC)–Wide range for flexibility
Optional Inputs Also available for 110 VDC,125 VDC,or 220 VDC systems(different variants)
Output 1+5 VDC,3 A–Powers microprocessor,logic circuits,HMI
Output 2±15 VDC,0.5 A–Powers analog input circuits(CTs,VTs)
Power Rating Approx.20 W total output
Efficiency>85%–High efficiency reduces heat generation
Protections Overvoltage,Overcurrent,Short-Circuit,Thermal Shutdown
Isolation Reinforced insulation between input and output–Meets IEC 60664
Status Indication Green LED for”Power OK”–Visual health monitoring
Mounting Plug-in module,designed for integration with Relion 615 relay base
Operating Temperature-25°C to+70°C–Suitable for harsh substation environments
Compliance IEC 60255,IEC 61000-6-2/6-4(EMC),IEC 60068(environmental)
Order Code 3AHM582001R0101(Common variant)
Technical Principles and Innovative Values
Innovation Point 1:The SAFT111POW features a wide input voltage range(18–72 VDC),allowing it to operate reliably in systems with unstable or fluctuating DC control power,common in aging substations or during battery discharge.
Innovation Point 2:Dual regulated outputs(+5 V and±15 V)ensure clean power for both digital and sensitive analog circuits.The±15 V rail is critical for accurate current and voltage measurements from CTs and VTs.
Innovation Point 3:High electromagnetic compatibility(EMC)design enables reliable operation in high-noise environments near circuit breakers,transformers,and arc faults—where voltage spikes and transients are common.
Innovation Point 4:Plug-and-play modular design allows field replacement in minutes without soldering or recalibration,minimizing downtime during maintenance.
Innovation Point 5:Thermal and electrical protection features prevent catastrophic failure.If overheated or overloaded,the module shuts down safely and restarts when conditions normalize.
Application Cases and Industry Value
In a mining operation in Australia,multiple REF615 relays in remote switchgear panels experienced intermittent resets due to poor power quality on the 48 VDC battery system.Investigation showed aging power supplies could not handle voltage ripple.All SAFT111POW modules were replaced with new units featuring improved filtering.The relays have operated without a single power-related fault for over 3 years,ensuring uninterrupted protection of critical conveyor and ventilation motors.
At a wind farm substation in Scotland,the SAFT111POW’s ability to handle input transients proved vital during lightning strikes.While nearby equipment failed,the protection relays remained online,maintaining grid stability.
Related Product Combination Solutions
ABB REF615:Motor and feeder protection relay–Primary user of SAFT111POW
ABB REL615:Transformer protection relay–Compatible with same power module
ABB RED615:Distance protection relay–Uses identical or similar PSU
ABB Battery Systems:24 V,48 V,110 V DC control power sources
ABB PCM600:Software used to monitor relay health,indirectly dependent on stable power
ABB SAFT111CPL:Communication plug-in module–Works in tandem with powered relay
ABB SAFT111HMI:Human-Machine Interface–Powered via the same PSU
ABB Relion 615 Chassis&Base:Mechanical housing where SAFT111POW is installed
Installation,Maintenance,and Full-Cycle Support
The SAFT111POW is installed by sliding or plugging it into the designated slot on the Relion 615 relay base.Input power(e.g.,48 VDC)is connected via terminal blocks,often with screw or spring-clamp terminals.The module automatically regulates and distributes power to the relay’s internal circuits.
During commissioning,technicians verify the”Power OK”LED is lit and measure output voltages if needed.
Maintenance includes:
Visual inspection for discoloration or swelling
Checking input voltage stability
Replacing the module if the relay fails to power up or behaves erratically
ABB provides long-term product availability and technical support.While newer relay platforms may use updated power modules,the SAFT111POW remains widely supported due to the extensive global deployment of the Relion 615 series.
Conclusion
The ABB SAFT111POW is a mission-critical power supply module,not a PLC.It ensures the reliable operation of advanced digital protection relays in power systems.For PLC solutions,consider ABB’s AC500,AC800M,or PM800 series.The SAFT111POW is essential for protection and automation engineers,substation technicians,and maintenance teams responsible for keeping critical electrical infrastructure online.
