ABB RET670 1MRK002816-AB數(shù)字繼電器保護(hù)裝置為兩繞組和三繞組變壓器、自耦變壓器、升壓變壓器和發(fā)電變壓器組、移相變壓器、專用鐵路變壓器和并聯(lián)電抗器提供快速、選擇性的保護(hù)、監(jiān)測和控制。
ABB RET670 1MRK002816-AB數(shù)字繼電器保護(hù)裝置產(chǎn)品詳情說明：
| 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、低阻抗差動保護(hù)功能，對CT的要求非常低。它適用于具有最多六個約束CT輸入的多斷路器布置的不同應(yīng)用。差動保護(hù)功能具有二次諧波和波形塊抑制功能，以避免CT飽和和變壓器沖擊電流跳閘，以及五次諧波抑制功能，避免變壓器過勵磁跳閘。差動功能通過使用基于負(fù)序分量的振幅測量和方向比較的靈敏差動保護(hù)功能，為低電平內(nèi)部故障提供了高靈敏度。多個低阻抗限制接地故障保護(hù)功能可作為靈敏快速的主保護(hù)，以防止繞組接地故障。此功能包括一個內(nèi)部/外部故障鑒別器，以提高安全性。此外，還提供了高阻抗差動保護(hù)功能。它可用于不同的應(yīng)用，包括繞組保護(hù)、自耦變壓器差動保護(hù)、并聯(lián)電抗保護(hù)、T型饋線保護(hù)、母線保護(hù)和發(fā)電機(jī)差動保護(hù)等限制接地故障保護(hù)。 |
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ABB RET670 1MRK002816-AB數(shù)字繼電器保護(hù)裝置產(chǎn)品視頻：
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