FAQ Search Results

NTC 电阻器（英文：Negative Temperature Coefficient）是一种在低温时电阻值相对较高，而在高温时几乎没有电阻的电阻器。

额定电压是电源可连接的电源电路的指定系统电压。三相系统中的额定电压是外部导体之间的电压。

MTBF（英文：Mean Time Between Failures）是“随机设备故障”的统计概率。

对流冷却是被动冷却，无需使用风扇强制通风。

IP 防护等级规定了电气设备对接触、异物和水的防护。IP 防护等级的代码在 IEC/EN 60529 标准中有规定，由两个数字组成。第一个数字表示防止接触和灰尘，第二个数字表示防水。

A 19-inch rack is a modular system for mounting electronic equipment that complies with the DIN 41494 standard. The system consists of plug-in printed circuit boards (PCBs), PCB mounts (sub-racks) and 19-inch cabinets, all of which are designed to be compatible and to be combined with one another in different ways.

If you want to provide a battery buffer for a 24 V system, you generally use two conventional 12 V batteries connected in series. The batteries must be paired and must have the same state of charge and ageing. If this is not the case, one battery may be overcharged or damaged or may age prematurely. The PULS single-battery concept simplifies this process and extends the useful life of the batteries.

The 3D data are the three-dimensional mechanical designs of the power supplies and devices in electronic form.

Leakage current is also known as stray current or touch current. It is important to limit leakage current in order to protect users from dangerous touch voltage and prevent faults from occurring in the system.

PULS devices can be used without restrictions up to a height of 2000 metres above mean sea level. Above an altitude of 2000 metres, the output power must be derated, because the air pressure falls as the altitude increases. This means that the air becomes less dense, which also reduces the cooling effect of the convection air flow in the power supply.

Ripple and noise voltage is the alternating current voltage superimposed on the output voltage. In the case of a switched-mode power supply, this is specified in mVpp (millivolts peak-to- peak).

A 1-phase power supply with an auto-select or auto-range input detects the input voltage and automatically selects the correct input voltage range.

AWG (American wire gauge) describes the diameter and cross section of wires. The AWG system is mainly used in North America.

Before delivery, PULS subjects every power supply to an endurance test at an increased ambient temperature as part of the manufacturing process. This is known as a burn-in test. The burn-in test is carried out for quality assurance purposes.

A burst is an electrical fast transient (e.g. on the mains power line).