ABB RET670 1MRK002816-AB数字继电器保护装置为两绕组和三绕组变压器、自耦变压器、升压变压器和发电变压器组、移相变压器、专用铁路变压器和并联电抗器提供快速、选择性的保护、监测和控制。
ABB RET670 1MRK002816-AB数字继电器保护装置产品详情说明：
| RET670 has fast and low impedance differential protection function, with very low requirements for CT. It is suitable for different applications with multiple circuit breaker arrangements with up to six constrained CT inputs. The differential protection function has second harmonic and waveform block suppression functions to avoid CT saturation and transformer surge current tripping, as well as fifth harmonic suppression functions to avoid transformer overexcitation tripping. The differential function provides high sensitivity for low-level internal faults by using sensitive differential protection functions based on amplitude measurement and directional comparison of negative sequence components. Multiple low impedance limited ground fault protection functions can serve as sensitive and fast main protection to prevent winding ground faults. This feature includes an internal/external fault discriminator to enhance safety. In addition, high impedance differential protection function is also provided. It can be used for different applications, including winding protection, autotransformer differential protection, parallel reactance protection Restricted ground fault protection such as T-type feeder protection, busbar protection, and generator differential protection. | RET670具有快速、低阻抗差动保护功能，对CT的要求非常低。它适用于具有最多六个约束CT输入的多断路器布置的不同应用。差动保护功能具有二次谐波和波形块抑制功能，以避免CT饱和和变压器冲击电流跳闸，以及五次谐波抑制功能，避免变压器过励磁跳闸。差动功能通过使用基于负序分量的振幅测量和方向比较的灵敏差动保护功能，为低电平内部故障提供了高灵敏度。多个低阻抗限制接地故障保护功能可作为灵敏快速的主保护，以防止绕组接地故障。此功能包括一个内部/外部故障鉴别器，以提高安全性。此外，还提供了高阻抗差动保护功能。它可用于不同的应用，包括绕组保护、自耦变压器差动保护、并联电抗保护、T型馈线保护、母线保护和发电机差动保护等限制接地故障保护。 |
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ABB RET670 1MRK002816-AB数字继电器保护装置相关产品：
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