NGPS13C | 3AUA0000042489 ABB POWER SUPPLY

Frame B4 supply modules are fixed to the rear wall of the cabinet withtwo screws, and to the floor of the cabinet with further two. The weightof the module(s) is supported by the cabinet floor. An air baffle must beused to prevent air from circulating inside the cabinet; Figure 2-13shows a suitable design. The input and output connections on the leftside of the module are made using busbars.These supply modules require an external DC reactor on the DC bus(the L– busbar). The reactor can be installed in a separate cabinet asshown in the layout examples below. The cooling air must be preventedfrom circumventing the reactor.