RET521 Transformer Protection Terminal | ABB | Fault Detection & Control
Manufacturer: ABB
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Part Number: RET521
Condition：New with Original Package
Product Type: Transformer Protection and Control IED
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB RET521 Transformer Protection Terminal 1MRK001530-AE
Overview
The ABB RET521 is a versatile transformer protection terminal designed for two- and three-winding power transformers in both utility and industrial substations. It integrates a wide range of protection, control, measurement, and supervision functions into a single device, significantly reducing the need for multiple separate relays.
Ideal for applications such as transformer protection, feeder protection, and backup for high-voltage line relays, the RET521 ensures the reliable and efficient operation of electrical power systems. With its advanced functionality and seamless communication capabilities, the RET521 is a valuable asset in industrial automation and utility networks.
Technical Specifications
| Attribute | Specification |
|---|---|
| Model Number | RET521 |
| Part Number | 1MRK001530-AE |
| Type | Transformer Protection and Control IED |
| System Compatibility | ABB Relion® 500 series, Substation Automation |
| Protection Functions | Differential, overcurrent, earth-fault, thermal overload, restricted earth-fault |
| Control Functions | Breaker/disconnector control, interlocking, autoreclosing |
| Inputs/Outputs | Configurable binary inputs/outputs, analog inputs |
| Measurement | Current, voltage, frequency, power, energy |
| Recording | Disturbance recorder, event logger, fault recorder |
| Communication Protocols | IEC 61850, SPA bus, Modbus, DNP3 |
| Interface | Local HMI (LCD + keypad), remote communication |
| Power Supply | 24–250 VDC / 100–240 VAC |
| Operating Temperature | –40°C to +55°C |
| Storage Temperature | –40°C to +70°C |
| Dimensions (H × W × D) | 310 × 177 × 215 mm |
| Weight | 8–10 kg |
| Certifications | IEC, ANSI, CE, UL |
| Application Areas | Transformer protection, utility and industrial substations |
FAQ
Q1: What protection functions does the ABB RET521 support?
The RET521 supports differential protection, overcurrent, earth-fault, thermal overload, and restricted earth-fault protection, offering comprehensive safeguarding for transformers.
Q2: Can the ABB RET521 integrate with SCADA or DCS systems?
Yes, the RET521 supports communication protocols such as IEC 61850, SPA bus, Modbus, and DNP3, enabling seamless integration into SCADA and DCS systems for centralized monitoring and control.
Q3: Does the ABB RET521 have a local user interface?
Yes, the RET521 features a local HMI with an LCD display and keypad for easy operation. It also supports remote communication for flexible control.
Q4: What is the power supply requirement for the ABB RET521?
The RET521 operates on a 24–250 VDC / 100–240 VAC power supply, making it compatible with most industrial setups.
Q5: What industries can benefit from the ABB RET521 transformer protection terminal?
The RET521 is commonly used in utility substations, industrial substations, power generation, and distribution systems, where reliable protection and monitoring of transformers are crucial.