Plug Setting: It is also called pick up current. It is value of currrent for which the relay operates. Like a 400/5 current transformer, and current setting is 130 %, so pick up value/plug setting is
Plug setting/Pick up current=1.3*5=6.5 A.
Time multiplier Setting- TMS adjusts the time of operation of relay. Lower the value ofTMS, faster the relay operates. Like for TMS of 1, relay operation time is 4 s,
then for TMS of 0.2, relay operates at 0.8 s
Plug Multipier Setting: This is ratio of fault current to pick up current/plug setting
PMS=Fault Current/Plug Setting