Product

SZPW Switching DC Power Supply

SZPW power system microcomputer high-frequency switching DC power supply is highly stable new-generation power system DC operating power supplies designed and produced by our company based on our years of experience in the development and operation maintenance of DC power supplies. Serving as control loads, power loads and DC emergency lighting loads, the products apply to substations, thermal power plants, hydropower plants and other places needing DC power supplies.

Introduction

  • SZPW power system microcomputer high-frequency switching DC power supply is highly stable new-generation power system DC operating power supplies designed and produced by our company based on our years of experience in the development and operation maintenance of DC power supplies. Serving as control loads, power loads and DC emergency lighting loads, the products apply to substations, thermal power plants, hydropower plants and other places needing DC power supplies.

Function

  • Basic functions: intelligent battery management, system parameter setup, DC parameter detection, AC parameter detection, audible and visual alarms for system faults, real-time detection for the insulation resistances of buses and automatic voltage stabilization for the control bus;
  • Extended functions: battery inspection, branch insulation inspection, feed switch status detection, DC/AC inverter output, DC/DC reduced voltage output and AC distribution output

Condition

  • Altitude: ≤2500m
  • Ambient temperature: -10℃~+45℃
  • Relative humidity: The daily average ≤95%,the monthly average≤90%:
  • No violent vibration, strong heat source, corrosive gas or conductive dust on the installation site
  • No strong electromagnetic interference but an external magnetic field induction intensity not more than 0.5Mt on the installation site
  • Declination: ≤5% in installation
  • AC sine power supply with anon-sinusoidal wave content of 10% at most
  • Three-phase five-wire power supply with voltage asymmetry not more than 5%

Feature

  • ◆ Flexible configuration and convenient expansion because of full automatic current-sharing N+1redundant modular design;
  • ◆Small voltage distortion, high efficiency, high accuracy of voltage and current stabilization, small ripple factor and good electrical properties and electromagnetic compatibility because of the advanced power factor correction technology, the LLC resonant DC/DC conversion technology and the soft switching technology used for the rectification module;
  • ◆Complete protections such as output overvoltage protection, output current limit protection, short circuit protection, overtemperature protection, overcurrent protection, fault alarming for the rectification module;
  • ◆Convenient hot plugging and online maintenance of the charging module;
  • ◆Hardware low voltage difference automatic current-sharing technology and a current-sharing unbalance equal to or less than ±3% among modules;
  • ◆High stability because of two AC inputs (a master one and a slave one) supporting automatic switching;
  • ◆Applicability to even areas with unstable power supply because of great adaptability to grids as a result of an extremely wide AC input range up to AC380V±20%;
  • ◆Online parameter detection and fault alarming, as well as quicker operation, more functions and higher integration because of an industrial microprocessor that is the core of the intelligent monitoring unit;
  • ◆Large LCD or touch screen of the monitoring unit, that is characterized by centralized display and unique Chinese or English directed human-machine interface with simple, visualized and easy operation and extremely low misoperation rate;
  • ◆A standard serial communication port supporting multiple communication protocols and realizing unattended operation, telemetering, remote control, remote signaling and remote adjusting by communication with a host computer;
  • ◆Longer life and less maintenance because of automatic charge, discharge and maintenance and online temperature monitoring of the battery supported by the advanced intelligent battery management technology; (Optional)
  • ◆Effective absorption and prevention of grid surges and higher harmonics by a class-C lightning protection device and safety of itself and people guaranteed by a high-strength electric insulation measure;
  • ◆High quality and good performance because of parts of domestic or international famous brands
  • Technical Data

    • ◆ AC input: 380VAC±20%,50Hz±10%;
    • ◆output voltage: DC99-143V、DC198~286V;
    • ◆Voltage stabilization accuracy: ≤±0.2%;
    • ◆Current stabilization accuracy: ≤±0.2%;
    • ◆Ripple factor: <0.02%;
    • ◆Full-load efficiency: ≥96%;
    • ◆MTBF: more than 100000 hours;
    • ◆Power factor: ≥0.95;
    • ◆Current-sharing unbalance: ≤±3%;
    • ◆Noise: ≤55dB;
    • ◆Insulation resistance: ≥20MΩ


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