The ABB RET670 1MRK002816-AB Transformer Protection IED (Intelligent Electronic Device) represents the cutting edge of substation automation and transformer protection technology. Manufactured by ABB Substation Automation Products, this microprocessor-based protection relay delivers comprehensive monitoring, control, and protection functions for power transformers in utility substations, industrial power distribution systems, and marine electrical installations. Operating from a 90-250 VDC auxiliary supply with binary inputs rated for 220/250V DC, the RET670 provides the flexibility and performance required for modern digital substation architectures.

Power transformers represent one of the most critical and expensive components in any electrical power system. A transformer failure can result in extended outages, substantial repair or replacement costs, and significant safety hazards. The ABB RET670 addresses these risks through a comprehensive suite of protection functions including differential protection, restricted earth fault protection, overcurrent protection, thermal overload monitoring, and through-fault restraint logic that prevents nuisance tripping during external fault conditions. The relay's RL=220VDC, IR=1A rating indicates compatibility with standard instrument transformer secondary circuits, while its 50/60Hz frequency accommodation supports deployment in power systems worldwide.

Key Features & Specifications

The ABB RET670 transformer protection IED incorporates advanced technology drawn from ABB's extensive experience in power system protection. Every feature is designed to maximize transformer availability while providing rapid, selective fault clearing when internal faults occur.

• Product Series: RET670 Transformer Protection IED
• Ordering Number: 1MRK002816-AB
• Auxiliary Supply: 90-250 VDC wide-range input
• Frequency Range: 50/60 Hz for global deployment
• Binary Input: 220/250V DC rated for standard substation battery systems
• Relay Rating: RL=220VDC, IR=1A for standard CT/PT circuits
• Reference Module: 1MRK002802-AA
• Protection Functions: Differential, REF, overcurrent, overload, and more
• Communication: IEC 61850 and legacy protocols for substation integration
• Weight: 9.150 kg compact rack-mount design

Technical Specifications

Specification	Details
Product Model	RET670 1MRK002816-AB
Product Series	ABB RET670 Transformer Protection
Manufacturer	ABB Substation Automation Products
Auxiliary Voltage	90-250 VDC
Frequency	50/60 Hz
Binary Input Rating	220/250V DC
Relay Load	RL=220VDC
Relay Current	IR=1A
Reference Module	1MRK002802-AA
Order Reference	4200048060-010
Weight	9.150 kg

Applications & Use Cases

The ABB RET670 1MRK002816-AB transformer protection IED is deployed across a broad spectrum of power system protection applications where reliable transformer monitoring and fault protection are essential. In utility substations, this IED provides primary protection for power transformers ranging from distribution to transmission voltage levels. Its comprehensive protection function library covers all common transformer configurations including two-winding, three-winding, and auto-transformer arrangements with vector group compensation for accurate differential protection regardless of winding connection.

Industrial applications include large motor drive transformers, furnace transformers, and rectifier transformers in steel mills, mining operations, and chemical processing plants. The 90-250 VDC supply range accommodates standard substation battery systems (125V DC and 250V DC are common), eliminating the need for DC-DC converters in most installations. In marine technology applications, the RET670 protects main power transformers on large vessels and offshore installations where transformer availability directly impacts operational capability and safety. The relay's compact 9.150 kg design facilitates installation in space-constrained electrical rooms typical of marine and offshore environments.

Why Choose the ABB RET670 1MRK002816-AB

ABB's RET670 series represents the culmination of decades of research and development in power system protection. The relay's adaptive differential protection algorithm automatically compensates for transformer inrush current characteristics, preventing nuisance tripping during energization while maintaining full sensitivity to internal faults. This sophisticated restraint logic far exceeds the capability of electromechanical and early static relays, delivering both security and dependability in proportions that maximize transformer availability.

The IEC 61850 communication capability (where enabled) positions this relay for integration into modern digital substation architectures with process bus and sampled value interfaces. Even in legacy installations, the RET670 supports established protocols including IEC 60870-5-103 and multiple Modbus variants, ensuring compatibility with existing SCADA and substation automation systems. The wide 90-250 VDC supply range demonstrates ABB's design consideration for global deployment, accommodating the battery system voltages used in different regions and application types. When you purchase from Aeliya Marine Tech, you receive the benefit of our 30-day warranty, free shipping, and access to our technical team's expertise in protection relay applications.

Compatibility & Integration

The ABB RET670 1MRK002816-AB is designed for seamless integration into both new substation projects and retrofit applications. The relay accepts standard 1A or 5A secondary current inputs from current transformers and accepts voltage inputs from potential transformers or capacitive voltage transformers. The binary input circuits at 220/250V DC are compatible with standard substation control voltages, enabling direct connection to circuit breaker auxiliary contacts, disconnect switches, and control switches without signal conditioning.

Integration into substation automation systems is facilitated through multiple communication ports supporting both copper and fiber optic media. The relay's programmable logic functions enable customized tripping schemes, interlocking logic, and automatic transfer schemes without external auxiliary relays. For marine and offshore installations, the RET670's compact form factor and rugged construction suit the space constraints and environmental conditions encountered aboard vessels and platforms. Aeliya Marine Tech can provide application guidance and documentation to support successful integration into your specific power system protection scheme.

Maintenance & Support

ABB designs the RET670 series for long service life with minimal maintenance requirements. The relay's self-supervision functions continuously monitor internal health, communication links, and analog input circuits, generating alarms when anomalies are detected. Periodic maintenance typically includes verification of protection settings, testing of output contacts, and functional testing of protection elements using secondary injection test equipment. The relay's event recording and disturbance recording functions provide valuable diagnostic information following system disturbances or operations.

Aeliya Marine Tech provides comprehensive support for all protection relays we supply. Our technical team includes engineers with experience in substation automation, power system protection, and marine electrical systems. We can assist with setting calculation guidance, commissioning procedures, and troubleshooting. Our 30-day warranty on used equipment provides peace of mind, and our free shipping policy ensures cost-effective worldwide delivery. For facilities requiring factory-authorized service or recertification, we can coordinate with ABB's global service organization.

Frequently Asked Questions

Q1: What protection functions does the RET670 provide?

The RET670 provides comprehensive transformer protection including percentage-restrained differential protection, restricted earth fault, overcurrent (phase and ground), thermal overload, overexcitation, and breaker failure protection. Additional functions include disturbance recording, event logging, and circuit breaker condition monitoring.

Q2: What transformer configurations does this relay support?

The RET670 supports two-winding, three-winding, and auto-transformer configurations with automatic vector group compensation. The relay adapts to all common winding connections (star, delta, zigzag) and can be configured for phase-shifting transformer applications.

Q3: Is this relay suitable for marine power transformer protection?

Yes, the RET670 is suitable for marine transformer protection applications. Its compact design fits the space constraints of vessel electrical rooms, and its wide supply voltage range accommodates marine DC battery systems. The relay's environmental specifications suit marine operating conditions.

Q4: What communication protocols are supported?

The RET670 supports IEC 61850 (including GOOSE messaging), IEC 60870-5-103, Modbus RTU/ASCII/TCP, and DNP3. This broad protocol support enables integration with virtually all substation automation and SCADA systems.

Q5: What is included with the 30-day warranty from Aeliya Marine Tech?

Our 30-day warranty covers defects in materials and workmanship. If the relay fails to perform as specified during the warranty period, Aeliya Marine Tech will repair or replace the unit at our discretion. Free worldwide shipping applies to all orders.

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