the first eleven cbh class locomotives from batch 1 and the three locomotives from batch 2, road numbers cbh001 to cbh011 and cbh023 to cbh025, are designated as type mp27cn (27 means 2,700 hp, c means three driven axles per bogie, and n means narrow gauge). these units are equipped with a cummins v-16 qsk60 prime mover rated at , and ride on narrow gauge bogies fitted with six ge 761 traction motors.