Description
RET650 1KHL160006R0001B Rev A is a transformer protection and measurement device (IED) in the ABB Relion series, positioned as a ready-made protection solution for double winding and three winding transformers, autotransformers, generator transformer sets, phase-shifting transformers, and parallel reactors. Its biggest feature is that it has extremely low requirements for CT, and in most application scenarios, there is no need to configure intermediate transformers.
Core positioning: Transformer full function protection IED, covering various types of transformers from 110kV to 500kV, serving as both primary and backup protection.
ABB RET650 Transformer Protection Unit Rev A 1KHL160006R0001B
In terms of protection function, differential protection is the core, providing two modes of dual winding and three winding transformer differential, with second harmonic and waveform block blocking for excitation inrush current braking, fifth harmonic blocking for overexcitation braking, and support for sensitive differential based on negative sequence components for detecting low-level internal faults. Ground fault protection provides a low impedance braking scheme, including internal/external fault discriminators to improve safety, and also supports high impedance differential protection. Backup protection includes four stages of zero sequence overcurrent protection (with integrated direction comparison function), positive and negative sequence zero sequence overcurrent with direction and/or voltage control (four stages in total), instantaneous phase current and zero sequence current protection, dual time constant thermal overload protection, circuit breaker failure protection, three-phase inconsistency protection, directional over/under power protection, and negative sequence based overcurrent protection. Voltage protection includes two-stage low voltage and two-stage overvoltage. Frequency protection includes two-stage overclocking/low-frequency protection. In addition, it provides automatic reclosing, synchronization detection, and secondary system monitoring functions. Trip signals from Buchholz and temperature devices can be directly connected through high anti-interference binary inputs. Differential protection has adaptive stability function and can cope with heavy fault crossing current, excitation inrush current, and overexcitation conditions.
In terms of measurement and monitoring, it provides the ability to connect 40 analog signals and 96 switch signals, with high accuracy in analog measurement, power value error less than 0.5%, voltage and current value error less than 0.25%, and can be calibrated on site. Built in interference and event recorders for post fault analysis, supporting maximum demand calculation.
In terms of communication, based on the IEC 61850 1st/2nd edition design, it can be equipped with up to 6 merging units (MU), supporting HSR, PRP redundancy, and GOOSE messages, and compatible with the IEC 61850-9-2 process bus. Native support for LON and SPA buses. Supports IEC 61850-8-1, SPA, switch input or GPS/IRIG-B module for timing, and IEEE 1588 v2.
In terms of configuration and hardware, PCM600 software is used for tuning and waveform analysis, supporting 6 independent tuning value groups with password protection. Advanced logic can be programmed into user logic through graphical tools. The standard configuration includes a binary input module and a binary output module, which are expandable. Adopting a standard rack mounted withdrawable design, the working temperature is -25 ℃ to+70 ℃, the protection level is IP20, the power consumption does not exceed 200W, and the supporting graphical LCD panel supports local operation. Panel damage does not affect the protection function.
Application industry:
Protection of main transformers and contact transformers for power supply companies in various provinces, cities, and counties under the State Grid Southern Power Grid in the power utility industry; In the petroleum and petrochemical industry, transformer protection for refineries and oil field substations of PetroChina, Sinopec, and CNOOC; Main transformer protection for non-ferrous and ferrous metal mines in the mining and metallurgical industry, and protection for electric furnace transformers in steel plants; The main transformer protection for large cement groups such as Conch China Resources in the cement and building materials industry; Protection of phase-shifting transformers and special railway power supply transformers in the rail transit industry, subway and national railway traction substations; Protection of step-up transformers and generator sets in the renewable energy industry, wind farms, and photovoltaic power plants; In the data center industry, protection for medium voltage main transformers in large data centers; Protection of medium and high voltage main transformers in large industrial enterprises, papermaking, food and beverage industries.
Usage scenario:
1、 110kV to 500kV substation main transformer protection, as a differential main protection with multiple backup protections for double winding or three winding main transformers, low impedance differential quickly cuts off internal faults, and overcurrent and zero sequence overcurrent are used as backups; 2、 Autotransformer protection, suitable for autotransformers in substations of 500kV and above, high impedance differential can distinguish between internal and external faults in the winding; 3、 Generator transformer unit protection, providing a complete set of differential, overcurrent, overexcitation, frequency abnormality, and synchronous detection protection for the generator transformer unit in the power plant, adapting to frequency changes during generator start stop periods; 4、 Phase shifting transformer protection, used for phase shifting transformers in railway traction substations, and pole slip protection can operate correctly during system oscillation; 5、 Parallel reactor protection, providing fast differential and ground fault protection for reactive power compensation parallel reactors; 6、 Wind power photovoltaic step-up transformer protection, adapted to the overexcitation, low-frequency, and differential protection requirements of the main transformer in new energy stations, and coordinated with synchronous inspection to achieve grid connection control; 7、 Industrial production line main transformer protection, comprehensive protection for overcurrent, grounding, thermal overload, and differential of medium voltage main transformers for high-power loads such as mining crushing stations, cement mills, and paper machines; 8、 Dual or multiple power supply systems achieve rapid interlocking of transformer protection and backup automatic switching within the station through GOOSE messages.
Summary in one sentence: RET650 1KHL160006R0001B Rev A is a mature protection and measurement device developed by ABB for various types of transformers and reactors. It features differential protection with low CT requirements, a complete set of backup protection, adaptive stability, and IEC 61850 multi protocol communication as its core. It can cover all scenarios from 110kV to 500kV without the need for intermediate transformers, and is widely used in power utilities, petroleum and petrochemical, mining and metallurgy, cement and building materials, rail transportation, renewable energy, data centers, and large industrial enterprises. It covers all transformer protection scenarios such as main transformers, autotransformers, generator sets, parallel reactors, and phase-shifting transformers.
