ABB RET670 controller accessories
ABB RET670 controller accessories
ABB RET670 provides fast and selective protection, monitoring and control for two - and three-winding transformers.
Autotransformers, boost transformers and generators transformer block units, phase shifting transformers, special railway transformers and shunt reactors. Ieds are designed to work correctly over a wide range of frequencies in order to accommodate frequency changes in the electrical system during interference and generator start-up and shutdown.
The RET670 features fast, low-impedance differential protection with very low ct requirements. It is suitable for differential applications in multi-circuit breaker arrangements with up to six constrained CT inputs. Differential protection features second harmonic and waveform block restraint to avoid CT saturation and transformer inrush current tripping, and fifth harmonic restraint to avoid transformer overexcitation tripping.
Differential function provides high sensitivity for low-level internal faults by using sensitive differential protection based on amplitude measurement and negative sequence component direction comparison.
A variety of low impedance limited ground fault protection functions as a sensitive and fast winding ground fault main protection. This feature includes an internal/external fault discriminator for added security.
In addition, it also has a high impedance differential protection function. It can be used for different applications, including limited ground fault protection as winding protection, self-transformer differential protection, shunt reactor protection, T-feeder protection, busbar protection and generator differential protection.
The RET670 can be used in applications with an IEC 61850-9-2LE process bus with up to six merge units (MU).
Other product models:
1MRK000614ABr03
1MRK000614ABr02
1MRK002239BBr03
1MRK002614BAr01
1MRK002614CAr01
1MRK000173CEr08
1MRK000173BEr05
1MRK000173BEr01
1MRK000173CFr00
1MRK000508ADr05
1MRK000508CDr06
1MRK000508HV
1MRK000508DDr03
1MRK000508CEr00
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