The laboratory power supply system is divided into a strong current system and a weak current system. The design of the laboratory power supply system should facilitate the use and maintenance of instruments and equipment, and a dedicated power distribution room should be accompanied.
Laboratory strong and weak current system
The design of laboratory power distribution engineering includes both strong and weak electricity. The strong current mainly includes instrument power, lighting sockets, etc., and the weak current includes: network, data communication, broadcasting, video surveillance, etc.
The strong current design should be based on the summary of the power of each instrument and equipment, and make statistics based on the size of the function room, floor, and the entire building. Each instrument room has a separate room terminal distribution box, and the main instrument needs to flow out of a circuit separately, and cannot be connected to the room. Lighting or other sockets are connected in series to facilitate the use and maintenance of equipment. The floor distribution box should be placed in a dedicated power distribution room, with door locks, and special person management.
The laboratory should be equipped with UPS (uninterruptible power supply) to provide protection for the main equipment in the laboratory. Determine the power and current parameters of the uninterruptible power supply according to the power parameters of the laboratory equipment. It should be noted that the selection of the uninterruptible power supply should reserve enough space for laboratory development, and consider the possibility of adding equipment to the laboratory in the future and planning to purchase equipment And then fully reserve the distribution load. The electrical plug can be designed on the wall or the ground according to the needs. The ground electrical plug should be waterproof to a certain degree, and the electrical plug should be located close to the powered instrument, reducing ground wiring and making the laboratory more tidy. As the uninterruptible power supply has high heat dissipation and noise, an independent power supply room was set up in the rear of the laboratory and a special air conditioner was installed in the room.
In terms of weak current: According to the development requirements of modern laboratories and the development trend of science and technology, it is recommended that the main room should be designed with multiple network communication ports and at least one telephone interface; the laboratory planning and design phase needs to design cameras in the main channel for laboratory management and monitoring, and conditions Each room can be designed, and even important precision instrument rooms can be enhanced by camera monitoring.
1. Laboratory power supply: In order to avoid the unstable or sudden power failure of the mains power supply, the operation of the laboratory is usually added with equipment power supplies and voltage stabilizers. UPS power supplies are commonly used, one is UPS power supply, and the other is EPS power supply .
2. Laboratory power supply line requirements:
Separate circuit for high-power instrument
Laboratories that require uninterrupted power supply, such as cultivation rooms and biosafety laboratories, should use special power supplies for dual insurance
The test bench is equipped with a certain number of three-phase and single-phase power sockets
In places with dampness, corrosive gas, fire and explosion hazard, etc., power distribution equipment with considerable protective performance should be selected
For laboratories with corrosive gases, copper cores are used for distribution wires
3. Laboratory lighting:
Generally, fluorescent lamps are suitable, which not only have long service life, large power supply area, high luminous efficiency, and low heat generation. However, different laboratories have different requirements for lighting. For example, analytical chemistry laboratories install fluorescent lamps in the operating place, sterile rooms install ultraviolet sterilization lamps, and laboratories with strict electromagnetic interference requirements should not use gas discharge lamps. Evacuate channels at safe exits. Evacuation indicator lights should be installed in other places.
4. Laboratory lightning protection (surge protection):
Lightning protection is divided into two aspects: direct lightning protection and induction lightning protection. The protection of direct lightning strikes is completed by the lightning rods installed in the building; the lightning protection work in the laboratory is mainly to prevent the overvoltage caused by the surge and other reasons of the induced lightning.
Comprehensive lightning protection for the laboratory, in addition to good lightning protection devices in the building where the laboratory is located, power supply lightning protection devices and signal lightning protection devices must also be installed in the laboratory to perform reliable and effective protection of the power supply system and signal system. protection.
The laboratory adopts a three-level lightning protection system. After the above three-level lightning protection configuration, the powerful lightning overvoltage can be reduced to the range that the equipment can withstand (within about 1000V).
5. Laboratory grounding:
Considering the actual application and location of the laboratory, a comprehensive grounding scheme is usually adopted. Lead two sets of ground wires into the laboratory from the common grounding body, one is the AC work ground, and the other is the safety protection ground. The AC working place enters the special power distribution cabinet of the laboratory, and the safety protection ground is connected with the laboratory grounding ring. The ground resistance of the system is less than 1 ohm.
CopyRight: KOMAN Laboratory Equipment Co., Ltd.
