# US 10,870,967 B2 · Medium voltage room for a mining shovel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,870,967 B2 - Document ID: US10870967B2 - Status: Granted - Kind: B2 - Application number: 16/388,950 - Filed: 2019-04-19 - Published: 2019-10-24 - Granted: 2020-12-22 - Earliest claimed: 2018-04-20 - Assignees: Joy Global Surface Mining Inc - Applicants: Joy Global Surface Mining Inc - Inventors: Joseph Colwell; Joshua Vizanko; Donald Daniel; Owen Warr - Web page: https://patentgrep.com/patent/US10870967B2 ## CPC - E02F 9/0858: {Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units (E02F9/16, E02F9/18 take precedence)} - E02F 9/163: {Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS] (for handrails mounted on cabins E02F9/0833 takes precedence; for vehicles in general B60R21/11, B60R21/13, for fork-lift trucks B66F9/07545)} - E02F 9/18: Counterweights {(for cranes B66C23/72, for tractors B62D49/085)} - E02F 9/2058: {Electric or electro-mechanical or mechanical control devices of vehicle sub-units (for vehicles in general B60W)} - E02F 9/2016: {Winches (winches per se B66D)} - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) ## Abstract A mobile mining machine includes a base with a deck and a counterweight box, a hoist drum supported on the deck, a motor drivably coupled to the hoist drum, a main transformer configured to supply power to the motor, an auxiliary transformer, and an electrical room coupled to the base. The main transformer and the auxiliary transformer are positioned inside the electrical room, and the electrical room contains at least one unguarded electrical connection. ## Claims ### Claim 1 A mobile mining machine comprising: a base including a deck and a counterweight box; a hoist drum supported on the deck; a motor drivably coupled to the hoist drum; a main transformer configured to supply power to the motor; an auxiliary transformer; and an electrical room coupled to the base, wherein the main transformer and the auxiliary transformer are positioned inside the electrical room, and wherein the electrical room contains at least one unguarded electrical connection. ### Claim 2 (depends on 1) The mobile mining machine of claim 1, wherein the electrical room is located on the counterweight box. ### Claim 3 (depends on 1) The mobile mining machine of claim 1, further comprising a main housing supported on the deck, the main housing enclosing the hoist drum and the motor, wherein the electrical room is located outside of the main housing. ### Claim 4 (depends on 1) The mobile mining machine of claim 1, further comprising a loadbreak switch associated with the main transformer, wherein the loadbreak switch is positioned inside the electrical room. ### Claim 5 (depends on 1) The mobile mining machine of claim 1, wherein the main transformer is configured to convert an input voltage of between 3,000 V and 22,000 V to an output voltage of between 480 V and 690 V. ### Claim 6 (depends on 5) The mobile mining machine of claim 5, wherein the auxiliary transformer is configured to convert an input voltage of between about 3,000 V and 22,000 V to an output voltage of between 120 V and 460 V. ### Claim 7 (depends on 1) The mobile mining machine of claim 1, further comprising an air filtration assembly, wherein the auxiliary transformer is configured to supply power to the air filtration assembly. ### Claim 8 (depends on 1) The mobile mining machine of claim 1, wherein the electrical room includes an access door configured to permit an operator to enter the electrical room and an interlock device coupled to the access door, wherein the interlock device is configured to prevent the access door from being opened when the main transformer or the auxiliary transformer is energized. ### Claim 9 A mobile mining machine comprising: a base including a deck and a counterweight box; a main housing coupled to the deck; an electrical room including a plurality of walls, a roof, and an access door configured to permit an operator to enter the electrical room; a transformer positioned inside the electrical room; and a loadbreak switch associated with the transformer and positioned inside the electrical room. ### Claim 10 (depends on 9) The mobile mining machine of claim 9, wherein the electrical room is positioned on the counterweight box outside of the main housing. ### Claim 11 (depends on 10) The mobile mining machine of claim 10, wherein the main housing includes a rear wall, wherein the plurality of walls of the electrical room includes a front wall positioned adjacent the rear wall of the main housing, and wherein the electrical room further includes a flexible connector surrounding an interface between the front wall and the rear wall. ### Claim 12 (depends on 9) The mobile mining machine of claim 9, wherein the electrical room includes a lifting bracket. ### Claim 13 (depends on 9) The mobile mining machine of claim 9, wherein the roof includes a removable panel section. ### Claim 14 (depends on 9) The mobile mining machine of claim 9, wherein the electrical room includes an interlock device coupled to the access door, wherein the interlock device is configured to prevent the access door from being opened from outside the electrical room when the transformer is energized. ### Claim 15 (depends on 14) The mobile mining machine of claim 14, wherein the electrical room includes an override configured to permit the access door to be opened from inside the electrical room. ### Claim 16 An electrical room for a mobile mining machine, the electrical room comprising: a plurality of side walls; a roof interconnected with the plurality of side walls; a main transformer disposed within the electrical room and configured to supply power to a first plurality of external loads; an auxiliary transformer disposed within the electrical room and configured to supply power to a second plurality of external loads; and a plurality of loadbreak switches disposed within the electrical room, wherein the electrical room contains a plurality of unguarded electrical connections. ### Claim 17 (depends on 16) The electrical room of claim 16, wherein the roof includes a removable panel section. ### Claim 18 (depends on 16) The electrical room of claim 16, further comprising an exhaust fan configured to exhaust warm air from the electrical room. ### Claim 19 (depends on 16) The electrical room of claim 16, further comprising an access door configured to permit an operator to enter the electrical room. ### Claim 20 (depends on 19) The electrical room of claim 19, further comprising an interlock device coupled to the access door, wherein the interlock device is configured to prevent the access door from being opened from outside the electrical room when the main transformer or the auxiliary transformer is energized.