Product details

• Long Description:
• SX540 Power Switch and Distr. Unit. AC 250V 35A.

• Product Net Depth / Length:
• 162 mm
  
• Product Net Height:
• 90 mm
  
• Product Net Width:
• 180 mm
  
• Product Net Weight:
• 2.25 kg

1. The AC power input is rectified and filtered into DC; 2. The switch tube is controlled by the high-frequency pwm(pulse width modulation) signal, and the DC is added to the switching transformer primary; 3. Switching transformer secondary induction of high-frequency voltage, through the rectification filter to supply load; 4. The output part is fed back to the control circuit through a certain circuit to control the pwm duty cycle to achieve the purpose of stable output.

In C++ programming, allocator is an important part of the C++ standard library. C++ libraries define a variety of data structures (such as linked lists, sets, etc.) that are collectively called "containers". One of the common characteristics of these containers is that their size can be changed during the running of the program. In order to achieve this, it is particularly necessary to conduct dynamic memory allocation, in which the allocator is used to handle the allocation and release of memory from the container. In other words, the allocator uses the STL container to encapsulate the low-level details of memory management. By default, the C++ standard library uses its own generic allocator, but programmers can customize allocators instead, depending on their needs.

Allocators were first invented by Alexander Stepanov as part of the C++ Standard Template Library (STL) to create "a way to make the library more flexible and independent of the underlying data model". It also allows programmers to make use of custom pointer and reference types in the library. However, when the standard template library was incorporated into the C++ standard, the C++ Standards Committee realized that a complete abstraction of the data model would cause unacceptable performance losses, and as a compromise, the allocators in the standard became more restrictive, and as a result, the allocators described in the existing standard were much less customizable than Stepanov had originally envisioned.

 ABB series of products