Caterpillar Performance Handbook, January 2017, SEBD0351-47

Shearers ● Specifications

Longwall

Electrical Control Box

Mainframe

MF2

MF3

MF4

ECB2

ECB3

●

●

EL2000

EL2000

●

●

EL3000

EL3000

●

●

EL4000

EL4000

Mainframe — MF2/MF3/MF4 ● High structural integrity and absorption of all cutting and haulage forces, providing maximum protection of all major units ● Maximum protection of electrical boxes, providing the highest level of flameproof integrity ● Improved access for maintenance and ease of over- haul and repair ● Versatility of application due to fully modular con- struction ● A split mainframe is available in case of transportation limitations Hydraulically Activated Top Guards ● EL3000 and EL4000 are equipped with hydraulically activated top guards

Electrical Control Box — MF2/MF3/MF4 ● This flameproof module contains the majority of the shearer electrical control and power distribution com- ponents ● High current carrying capacity of 400 amps (ECB2) or 500 amps (ECB3) and can accomodate trailing cables up to 185 mm² [ECB2] (2.9 in²) or 240 mm² [ECB3] (9.4 in²) ● All internal chassis can be ‘bench built,’ tested and stored ● Box contains various low voltage (LV) circuit break- ers which can be reset through the flameproof cover (FLP) cover, reducing downtime ● An extremly powerful PMC Evo-S control systemwith state-of-the-art Ethernet communication and backup functionality, this allows the shearer to be operated even if the overall control system is not functioning ● This unit also contains cutter motor contactors, cir- cuit breakers, control transformers, current monitor- ing, high voltage (HV) fuses, earth leakage and both visible disconnects

20-68 Edition 47