Product Description:

The HLR01.1N-15K0-N08R1-A-007-NNNN is a brake resistor produced by Bosch Rexroth Indramat within the HLR Brake Resistors series. In regenerative drive systems, the resistor converts excess DC bus energy into heat, allowing inverters and servo amplifiers to decelerate motors without overvoltage. This helps the connected drive handle braking energy during deceleration and rapid stopping.

The unit maintains a continuous thermal dissipation capability of 15 kW, which is the steady-state power it can convert into heat during normal duty. During emergency or rapid stops, it tolerates a momentary braking load of 74 kW, giving headroom for large-inertia machines. Its ohmic value is fixed at 9.1 Ω; when connected across the common bus, this resistance sets the initial current surge and affects how quickly voltage falls. The resistor is designed for drives operating on a DC link up to 700 V DC, so the insulation spacing and wire gauge match that voltage. A duty window of 120 s governs the thermal averaging period, and intermittent loads are evaluated within that time. The 25 mm² terminal cross-section accepts rigid or fine-strand copper conductors, and the housing measures 800 mm wide, 490 mm deep, and 270 mm high to accommodate the alloy grid elements.

Within the duty window, the resistor can engage at a peak ratio of 18 %, which equals a maximum on-time of 21 s before cooling is required. That interval corresponds to a single-event energy absorption of 1584 kWs, which can be matched to the calculated kinetic energy of the drive train. The frame is rated to IP20, so fingers are protected while airflow remains unrestricted for convection. A mass of 33 kg improves thermal inertia yet still permits panel mounting without additional supports. The non-vented sides keep heat away from nearby wiring, and the large footprint spreads temperature over a broader surface to avoid hot spots after repeated cycles.