New principle for feeder grounding fault protection based on zero sequence admittance is presented in this paper. Criterions for the line groundrelay with zero sequence admittance are also discussed.
提出了采用测量线路零序导纳进行接地保护的新原理，讨论了直线式导纳继电器的接地保护判据。
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Using the company's UAS battle-management software, airborne operators issued NATO-standard sensor and air-vehicle commands via a UHF satellite communication link and ground-station relay.
It is also using these facilities to relay information from employees on the ground to its senior managers, and to get instructions from Cisco's leaders back out to its 67,000 staff.