The negative sequence distance relay gets free from the winding connection of the transformer. So it is the best choice to use the kind of the distance relays for the transformer backup protection.

负序距离继电器的行为与变压器绕组的接线无关，所以它是作为变压器后备保护的距离继电器的最佳选择。

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Relay. Coil voltage 9VDC. Footprint regular. Flux free. Coil sensitivity 0.2W. Duty version 2A.

继电器。线圈电压9VDC。足迹定期。无焊药。线圈灵敏度0.2W。职务版本2A。

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Four years earlier he won gold in the 4x100m freestyle relay and the 4x200m free relay.

CNN: Phelps on course with third gold medal

Phelps' bid to match Mark Spitz's historic 1972 haul of seven swimming gold medals has been thwarted by third place finishes in the 4x100m free relay and the 200m freestyle.

CNN: Phelps strikes gold, misses record

The 20-year-old Agnel, just a day after swimming an amazing anchor leg in leading France to victory in the men's 4x100 meter free style relay, routed the field in the 200-meter freestyle.

CNN: Olympics: Young stars winning swimming golds