Schweitzer Engineering Laboratories 
High-Impedance Differential Relay
Model # SEL-587Z
Part # 0587Z0X325522XX
48/125VDC Power<5.5W Supply
120VAC 50/60Hz <7VA
Logic Input: 80-150VDC
Rear Serial Port EIA-485
MOV 2
5 Amps
Used

(Loc: CS)