The design of Renda micro-monitoring DC screen refers to the Ministry of Electric Power's "DL/T5044-2004", "JB/5777.2-2002" and "JB/5777.3-2002" and other relevant technical standards, which can reliably meet the power supply needs of DC control power supply and high and low voltage switch switching and closing in normal or abnormal state of the transmission and distribution system. It is widely used in substations below 500KV and power plants below 600,000KW for DC operation power demand.
The field of use of Renda micro monitoring DC screen: metallurgy, automatic control, relay protection, substation, hotel building substation and distribution, etc.
System features
High reliability:
Modular design of switching power supply, N+1 hot backup.
The charging module can be hot-swapped with electricity, and the average maintenance time is greatly reduced.
The power bus and control bus can be directly supplied separately and directly by the charging module and can be hot-backed by a step-down device.
Hardware low-difference autonomous current sharing technology, the maximum output current imbalance between modules is better than 5%.
Reliable lightning protection and electrical insulation measures, optional insulation monitoring device can monitor the insulation of the system in real time to ensure the safety of the system and people.
The system design adopts IEC (International Electrotechnical Commission), UL and other international standards, and the reliability and safety are fully guaranteed.
Highly intelligent:
The monitoring module adopts large-screen LCD Chinese character display, sound and light alarm.
The parameter setting of each part of the system can be carried out through the monitoring module. The module has the function of smoothly adjusting the output voltage and current, and has the function of battery charging temperature compensation.
With multiple extended communication ports, it can access a variety of external intelligent devices (such as battery testers, insulation monitoring devices, etc.).
The combination of modern power electronics and computer network technology provides support for "telemetry, remote control, remote signaling, and remote adjustment" of the power supply system to achieve unattended.
Automatic battery management and protection, real-time automatic detection of battery terminal voltage, charging and discharging current, intelligent energy control of the average floating charge of the battery, with battery over-under-voltage and charging over-current sound and light alarms.
The system adopts the monitoring device built-in insulation supervision, battery detection, grounding line selection, battery activation, silicon chain voltage regulation, central signal and other functional units, which is greatly convenient for users;
The system adopts the unique "one-wire" wiring technology, which greatly facilitates the in-screen wiring of the large-capacity DC system and facilitates user maintenance.
● The charging module adopts the free cooling method, the mean time between failures is greatly improved, and it can be used in places with relatively harsh environments;
● The charging module can be plugged and unplugged with electricity, and the average maintenance time is greatly reduced;
● Using the latest international soft switching technology, the main components adopt high-quality brand-name products;
● Hardware low-difference autonomous current sharing technology, the maximum imbalance of output current between modules is better than ± 5%
● Reliable lightning protection and high degree of electrical insulation protection measures, insulation monitoring device real-time monitoring system insulation to ensure system and personal safety;
●The monitoring module adopts large-screen LCD touch screen display, real voice alarm;
●The monitoring program adopts object-oriented design ideas and modular programming, which is conducive to program maintenance and upgrading;
● Parameter settings of each part of the system can be carried out through the monitoring module, with detailed online help function;
● With smooth adjustment of output voltage and current, automatic battery temperature compensation and other advanced functions;
● The combination of modern power electronics technology and computer technology realizes "telemetry, remote control, remote signaling, remote adjustment" of the power supply system and realizes unattended;
● Automatic battery management and protection, real-time automatic monitoring of battery terminal voltage, charging and discharging current, and control the average charge and floating charge of the battery, with battery over-under-voltage and charging over-current sound and light alarm.
●The device can be supported by a public telephone line to realize remote maintenance and diagnosis.
Renda micro monitoring DC screen parameters:
Input voltage range: AC304~456V
Input grid frequency: 50HZ±10%
Power factor> 0.95
Efficiency> 95%
Output voltage: 180V~286V continuously adjustable
Output current: 10~100% continuously adjustable
Ripple coefficient≤ 0.1%
Current sharing characteristics: Current imbalance between charging modules≤ 3%
