The company is mainly engaged in the research, development, production and sales of EPS emergency power supply, uninterruptible power supply, AC/DC power supply screen, DC screen, photovoltaic inverter power supply, and power back to power supply. (1)Fire lighting emergency power supply
According to GB17945-2010 "fire emergency lighting and evacuation instructions system", emergency lighting and evacuation instructions power system is to provide lighting and evacuation instructions for personnel evacuation and fire fighting operations, mainly composed of various types of fire emergency lamps and lanterns and related devices, including self-contained power supply non-centralized control system, self-contained power supply centralized control system, centralized power supply non-centralized control system, centralized power supply non-centralized control system, and centralized power supply non-centralized control system, which is mainly used for fire fighting operations. system, centralized power supply non-centralized control system, centralized power supply centralized control system. Our company adopts the centralized power supply centralized control system for fire fighting lighting. When the power grid fails or fire occurs, the centralized power supply for emergency lighting will be controlled by the centralized lighting control box, which will start the centralized power supply for emergency lighting to supply power to the emergency lighting sub-distribution device, which will supply power to the emergency lighting fixtures and ensure the safe evacuation of the people.
(2) fast switching emergency power supply
High-pressure sodium lamps from the light to work stably in about 4-8min. when the power supply is interrupted, the lights go out, even if the power supply is immediately restored, the lights can not be lit immediately, about 10-20min to be bimetallic cooling and return to the closed state, to start again. Because the switching time of the traditional EPS power supply does not meet the switching time requirements of high-pressure sodium lamps (3.8ms or less), it can only be applied to the equipment that is not sensitive to the time requirements, so the general EPS power supply can not meet the requirements.
In the medical field, such as the operating table lighting power, if the UPS power supply, the same will be the UPS itself high power consumption; the use of other types of EPS power supply, there will be an instantaneous power outage, affecting the smooth progress of the operation, and even unexpected dangers, so fast switching EPS power supply to replace the medical UPS becomes a viable option.
(3) fire power emergency power supply
For high-rise buildings, underground buildings and other important buildings and places, fire has been one of the key points as well as difficult. According to GB16806-2006 "fire linkage control system", the fire power emergency power supply according to the nominal output characteristics of the fire equipment power supply, can receive linkage signals and receive linkage signals according to the pre-set linkage function of power supply, and to meet the standard requirements of the display function, protection function, control function, charging function, fault alarm function, designed for smoke exhaust fans, fire pumps and other high-power fire equipment to provide emergency power supply. High-power fire-fighting equipment to provide emergency power supply, in the event of a fire accident, the fire control center sends out a signal to start the emergency power supply, the stored DC power can be converted into a stable AC power to the fire-fighting equipment power supply, to ensure that the fire-fighting equipment can be safe and stable operation. In normal times, the emergency power supply is in the backup state, which can realize the role of energy saving and consumption saving.
(4) power supply standby emergency power supply
Today's society, the power supply directly affects the national economic development, however, power accidents and failures are objectively impossible to avoid, some important public **** building, once the power supply is interrupted, will cause significant political impact or economic losses. eps as a standby power supply independently of the grid is used in a variety of construction projects. Its importance is to ensure the provision of emergency power needed in the event of an accident, in order to effectively reduce the losses caused by power outages, to provide security for people's production and life safety. According to JG/T371-2012 "Centralized Battery Emergency Power Supply Unit", the 100K, 200K, 300K, 500K and other power supply standby EPS produced by Surekam adopts centralized battery design, which is specially designed to provide emergency power supply for all kinds of large-scale buildings and equipments, and to provide safe and stable alternating current (AC) power under the situation of power grid failure to ensure that large-scale equipments can work uninterruptedly and reduce the loss of power due to power failure. Equipment can work uninterruptedly to reduce unnecessary losses caused by sudden power outages. Industrial power uninterruptible power supply
UPS (Uninterrupted Power Supply), also known as uninterruptible power supply, inverter as the main component of the constant voltage and frequency of the uninterruptible power supply, usually placed between the utility grid and the power load, the purpose of which is to improve the quality of power supply to the load, and in the case of utility failure, to ensure that the load of equipment for the normal operation of the power supply. When the utility power is normal, the AC power supply part of the AC load through the AC to DC conversion, to provide high-quality AC power; in the utility power down or abnormal, the AC part of the battery energy will be inverted into AC power, to achieve uninterrupted AC output.
With the development of modern industry, the load of the power supply network is more and more complex, especially the start and stop of large-scale power equipment, the application of large-scale controllable power electronic equipment and the internal noise of the network will make the AC sine wave distortion. In addition, natural lightning, poor grounding of the network and other factors affect the quality of the power supply network. The power equipment in the industrialized production process can be divided into two major types: linear loads and nonlinear loads. For those demanding power supply requirements for demanding loads, usually by the uninterruptible power supply UPS system for power supply, this is because the UPS can provide high-precision, high stability of the voltage waveform and frequency, with the ability to withstand power grid fluctuations or disturbances (surges, drops, harmonics), intermittent or even short-term blackout, whether it be linear loads or non-linear loads, the UPS has a low impedance output characteristics.
Precise network equipment and communications equipment is not allowed to have intermittent power to the server as the core of the network center to be equipped with UPS is self-evident, even if it is an ordinary computer, the use of three months after the data files and other software value has exceeded the value of the hardware, and therefore, in order to prevent the loss of data and equipped with a UPS is also very necessary.
With the rapid development of information technology construction, computers are widely used in various fields, the AC power supply put forward higher requirements, so that the production of UPS has been rapid development, a large number of UPS put into use for the reliability of the system provides a strong guarantee. (1) PV grid-connected inverter power supply
In the PV grid-connected inverter system, the output voltage and frequency of the inverter power supply can be directly connected to the household power grid or industrial power grid. Grid-connected PV inverter system is a system that converts DC power from solar cells into AC power with the same frequency and phase as the grid voltage, and realizes both power supply to the load and power generation to the grid. Grid-connected photovoltaic system mainly consists of photovoltaic arrays, inverter power supply, power distribution cabinets and other components.
Photovoltaic array: photovoltaic array is the main component of the photovoltaic grid-connected power generation system, by which the received solar energy is directly converted into electrical energy.
Inverter power supply: it is the core of the whole PV grid-connected power generation system, which inverts the power from the PV array into 220V 50Hz sinusoidal voltage and connects it to the power grid or the user's demanded voltage. And at the same time control the maximum power point of the PV array tracking as well as control the power and waveform of the inverter grid-connected current. Individual components in the PV grid-connected inverter power supply can also operate independently so that each battery module can work in the best condition.
(2) off-grid inverter power
Off-grid inverter system is relative to the grid-connected inverter system, it and the grid-connected inverter system, the biggest difference is that it is not necessary to be incorporated into the grid. The advantage of an off-grid inverter system over a grid-connected inverter system is that it does not have to take into account safety issues such as the islanding effect. The inverter power supply is an integral part of the inverter system. The market thus distinguishes between off-grid and grid-connected inverter power supplies.
Off-grid inverters and grid-connected inverters do not have the ability to differentiate between situations in the main circuit structure. And off-grid inverter power supply does not need to consider these factors. (1) DC screen power
DC screen is the abbreviation of DC power supply operating system. Commonly known as intelligent maintenance-free DC power screen, referred to as DC screen. Simply put, DC screen is a device that provides a stable DC power supply. (Input has a 380V power supply is directly converted to 220V, in the utility and standby power are not input, directly converted to battery power supply - DC 220V; in fact, it can also be said to be a kind of industry-specific emergency power source). Power plants and substations in the power operation of the power source are now used in the DC power supply, which provides power for the control of loads and power loads, as well as DC accident lighting loads, etc., and is the basis for the control and protection of contemporary power systems. The DC screen consists of a cross-distribution unit, a charging module unit, a step-down silicon chain unit, a DC feeder unit, a distribution monitoring unit, a monitoring module unit and an insulation monitoring unit.
(2) AC and DC screen power supply
According to DL/T459-2000 "Power System DC Power Cabinet Technical Conditions", GB/T19826-2005 "General Technical Conditions and Safety of DC Power Equipment for Power Engineering", GB7260-87 "Uninterruptible Power Supply Equipment", DL/T5044-2004 "Power Engineering DC System Technical Regulations for Power Engineering DC System", GB4208-1993 "enclosure protection level", DL/T "DC and AC integrated uninterruptible power supply equipments for electric power", our company develops and produces LPJZ series AC and DC uninterruptible power supply units mainly have AC power distribution, rectifier module, inverter module, static switching module, monitoring module, insulation monitoring unit, battery inspection unit, AC and DC sampling unit, voltage reduction, silicon chain, flash alarm, storage battery, and so on. Silicon chain, flash alarm, battery pack, DC feeder, AC feeder, etc. It adopts modular structure, flexible selection, high reliability and strong adaptability.
The rectifier adopts high-frequency switching resonant high-efficiency intelligent power supply module, intelligent digital technology, independent equalization, temperature control fan, hot fast plugging, complete protection functions, high cost-effective, perfect system detection, easy to set up, four remote intelligent management.
System monitoring using touch screen 5.8-inch LCD, can monitor the AC power grid, DC feeder status, dynamic mother control mother voltage and current, battery voltage and current, each feeder sub-circuit status, alarm status, step-down silicon chain control interface, the system dry junction output, 19-108 single battery inspection (optional), branch circuit insulation inspection (optional), flash control and bus insulation alarm (optional). The monitoring system adopts four remote modes. Small system can also use small monitoring module, can monitor AC voltage, dynamic mother control mother voltage and current, battery voltage and current, feed out the state of the splitter, buck silicon chain control interface, dry junction output.
Monitoring according to the battery power system operation and management diagram, to complete the automatic control and management of all float charging, and has a charging temperature compensation function.
Monitoring module provides power standard RTU/CDT protocol, communication RS232/RS485 or TCP/IP (optional) interface, can be composed of a variety of network management systems with computers or integrated automation.
(3) shielding door DC screen power supply
According to CJ/T236-2006 "urban rail transit platform shielding door", installed in the subway, light rail and other rail transit station platform edge, the rail and platform waiting area isolation, there is no corresponding to the train door, can be multi-stage control of the opening and closing of the sliding door of the connecting barrier, referred to as the shielding door; including the full-height shielding door, half-height Shielded door.
Shielded door system for the first level of load, by the two-way AC input switched by the low-voltage distribution box to the shielded door system power supply. Shielded door power supply system is mainly composed of 2 parts, part of the drive power system, part of the control power system.
Which, drive power system, power is generally 40-60KVA or so, mainly for the subway station shielded door drive motor power supply, the size of its power depends mainly on the number of subway stations in the shielded door. The control system adopts DC power supply, the voltage level has 24V/48V/110V and so on. Although the power of the control system is not very large, but it is very important, so the control system power supply generally use redundant power supply to ensure the reliability of its power supply.
Metro power supply system, because the railroad track is a conductive circuit. Therefore, the subway power supply system generally need to use isolation transformers in order to completely isolate the ground. Metro power supply system for the battery requirements are also very special, generally using gel batteries or more heat-resistant and long-life batteries. The battery delay requirements are generally about 1 hour. As the load is the shielded door, so its specific delay requirements for a period of time for the shielded door can open and close the door 3-5 times. Subway screen door monitoring system must include power supply, including the working status of many devices and alarm information into. Therefore, it is necessary to monitor the various subsystems of the power supply system. Monitoring method generally used in industry commonly used MODBUS communication protocol, communication mode for RS485 or RS232