Porcelain cylindrical electrical equipment（PCEE）

as an important component in power delivery system

has suffered tremendous damage during the past earthquakes. We proposed a new damping method for PCEE based on multiple tuned mass dampers（MTMD）. An LVB1-110 current transformer was chosen as an example and the effectiveness and robustness of MTMD were studied by finite element analysis and shake table tests. The adverse influences to MTMD caused by icing loads and conductor connections were studie through a simplified method. Test results show that MTMD can be used to enhance the seismic performance of PCEE. MTMD

constituting 5% of the equipment mass

can averagely reduce the peak strain of the insulator root part to 70% in the absence of control. MTMD remains robust through different earthquakes. Besides

when the MTMD control frequencies deviate from the equipment natural frequency to a large extent

MTMD performs good robustness.