RZK01.1-400-BW

RZK01.1-400-BW, Bosch Rexroth Indramat, RZK Heat Exchangers opens a new frontier in external heat management for high-power inverters. The RZK01.1-400-BW model from Bosch Rexroth Indramat’s RZK Heat Exchangers series delivers 400 kW of frequency-inverter cooling capacity through an outside cabinet mounting design. Engineered for systems lacking integrated cooling, this exchanger integrates a built-in brake resistor to dissipate regenerative energy without auxiliary hardware. Its robust construction and IP20 rating ensure solid-particle protection while maintaining access and service simplicity.

In its compact footprint, the heat exchanger offers 2 x 5 kW of continuous cooling power supported by a 2 x 23 kg assembly weight. The enclosure meets IP20 protection class requirements, guarding against dust ingress while omitting liquid defense. Brake-resistor specifications include 2 x 1.6 Ω resistance and 2 x 2.5 kW nominal dissipation, with spurts up to 2 x 370 kW for 0.1 s to handle peak regenerative loads. A thermal time constant of 14.3 s ensures rapid equilibrium, and the unit demands just 200 mm of clearance above and below for optimal airflow.

Designed for seamless integration, the RZK01.1-400-BW mounts perpendicular to control-cabinet walls and channels heat exhaust away from critical electronics. Its maintenance-free architecture and built-in brake resistor enhance system uptime and simplify field servicing. Ideal for high-power drives and demanding industrial automation, this exchanger ensures stable operation under continuous and transient loads.