Product Description:

The HLR01.1N-66K0-N02R1-B-007-NNNN is a brake resistor produced by Bosch Rexroth Indramat within the HLR Brake Resistors series. Such resistors are wired to the DC bus of drive controllers to dissipate regenerative energy as heat during rapid deceleration or when driven by overhauling loads. By converting electrical energy into thermal energy, the unit helps prevent overvoltage trips and protects power modules in production machinery, conveyors, and test stands.

The resistor can dissipate a continuous thermal load of 66 kW and accept peaks of 293 kW for short events when the DC link reaches 785 V. Its value of 2.1 ohms sets the discharge current so the chopper transistor operates within its rating. For high-inertia stops, an energy capacity of 5250 kWs indicates how much energy can be absorbed before the housing reaches its maximum temperature. Such overloads are restricted to a maximum on-time of 18 s, and longer duty must be avoided to protect the wire-wound stacks. A thermal relay calibrated to 177 A trips auxiliary contacts if abnormal current persists. The IP23 housing shields against fingers and light water spray, while 95 mm² cables attach through an M10 clamp for minimal lead losses.

The hardware footprint measures 995 mm in width, 490 mm in depth, and 1100 mm in height, dimensions that fit inside most floor cabinets while leaving clearance for ventilation. With a mass of 138 kg, the unit requires hoisting points or a pallet jack for safe handling during installation or service. The steel case channels airflow across ceramic grids to keep surface temperatures within design limits under the stated continuous load. No forced cooling fans are included, so the unit should be mounted vertically with unobstructed air paths above the fins.