Protection Engineering Basics and Schemes Protection Engineering | Page 83

and DC supply 1 via tripping relay 94,close block with lock
out relay 86, Trip coil -1 with lock out relay 86 ,BCPU with
lock out relay 86, HMI/SAS signaling with lock out relay
86, DC supply with lock out relay 86,
Now in next drawing page we will review the panel
illumination and Heater circuit.
both heater and lightning panel is supplied via 220V ac
Supply, we provide thermal MCBs, these MCBs will trip
when thermal affect increase due to over current, or
itself current raise above the current setting of MCB.
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