UPS power supply related power terminology explanation (1)

UPS power supply related power terminology explanation (1)

Noise (electricallinenoise): refers to various high-frequency radiation such as radio frequency (RFI) and electromagnetic radiation (EFI), motor operation, relay action, motor controller operation, broadcast transmission, microwave radiation, lightning storms, etc. , will produce noise.

Frequency drift (frequencyvariation): refers to the change of the mains frequency exceeding 3Hz, which is mainly caused by the unstable operation of the emergency generator or the unstable frequency of the power supply.

Power failure: Refers to the effective value of the mains voltage is lower than the rated value and lasts for a long time. Reasons include: startup and application of large equipment, switching of main power lines, startup of large motors, line overload, etc.

Mains interruption (powerfai1): refers to the situation in which the mains is interrupted for at least two cycles to several hours. Reasons include: circuit breaker trip, mains interruption, grid failure, etc.

SNMP: is the English abbreviation of Simple Network Management Protocol (Simple Network Management Protocol). Its meaning is to allow computers and peripheral devices to be directly connected to the network without going through the computer, and managed by the network system. High-end UPSs often have an optional SNMP network management interface that allows the UPS to easily connect to the network.

IGBT: It is the English abbreviation of InsulatedGateBipolarTransistor. IGBT is a kind of power crystal. UPS designed with this crystal can effectively improve product performance, and has the advantages of good power quality, high efficiency, less heat loss, low noise, small size, and long product life.

Isolation transformer: refers to the equipment used in conjunction with the general UPS, often due to the influence of electrical characteristics on the ground voltage, resulting in equipment failure or malfunction. In order to avoid this situation, some high-end UPS designs UPS with isolation transformer for this problem. Through special design and coordination, the output zero-to-ground voltage can be less than 1 volt, avoiding the above problems. In addition, it has features such as noise filtering.

AVR: is the English abbreviation of Automatic Voltage Regulation. AVR means automatic voltage regulation, that is, the input voltage of the UPS is adjusted by the coil turns of the internal output transformer or processed by power electronic components, so that the UPS has a wide mains input range and stable output voltage characteristics.

Power Regulation: The voltage regulation accuracy of the output when the input changes.

Communication Protocol: The rules that interconnected devices follow when exchanging data.

SNMP: The English abbreviation of Simple Network Management Protocol, which is mainly used for monitoring, fault query and control of TCP/IP network, and provides a simple network management protocol for user data programming.

Input frequency range: The standard frequency of my country's power grid is 50Hz, and the UPS allows a certain range of variation in the frequency of the mains. Within this range, the UPS synchronously tracks the mains frequency, and if it exceeds it, it outputs at the local frequency.