Microcomputer relay protection tester wiring check: Differential protection is widely used in power systems in transformers, buses, and short-circuit protection. General differential protection simulation test is more difficult, mainly for the following reasons: First, the differential protection of the current loop is more, two-turn transformer needs high and low voltage on both sides of the current, three-turn transformer needs high, medium and low voltage three-side current Bus protection needs more; Second, the core of differential protection is to provide differential relays for differential relays or automation systems. It requires that the polarity of each current loop must be correct; otherwise, the polarity will become wrong. And current; Third, the characteristic test of differential protection is more difficult. For example, transformer differential protection is constructed by comparing the amplitude and phase of the currents on both sides of the transformer. The current transformers on both sides of the transformer are connected by differential connection. In normal operation and external faults, the current flowing into the relay is the difference between the currents on both sides. The value is close to zero and the relay does not operate. In the event of an internal fault, the relay flows in. The current is the sum of the currents on both sides. The value is the short-circuit current and the relay operates. It can be seen that the correct connection of current transformers on both sides of the transformer directly affects the operational reliability of longitudinal differential protection. In the microcomputer relay protection system, usually the secondary winding of the current transformer has two wiring forms, ie, the current wiring form and the differential current wiring form. Differential current wiring is characterized by the reverse polarity of a set of current transformer secondary windings connected with the other group, the so-called circulating current method wiring. Checking whether the current transformer wiring is correct is a work that relay protection workers often perform. The use of a clamp meter can directly detect and display the phase relationship of each current and voltage loop, thereby determining whether the wiring status is correct, reducing the workload of the testing personnel, and improving Work efficiency. [ Basic Information ] : Layered Powder Material Vtaalc,Vtaalc Black Powder,Mixed Metal Vtaalc Jilin 11 Technology Co.,Ltd , https://www.11techmxene.com
1. Chemical formula: VTaAlC
2. Component elements: V,Ta, Al, C
4. Chemical status: micro-nano size particles
5. Appearance and properties: black brown particles with micro/nano size
[Product Code] : YY201739
[Packaging specifications] : Fixed packaging 2/5/10/20g, or packaging according to customer requirements;
[Intended use] : Used for chemical etching preparation of MXenes, physical chemistry experimental research needs;
[Storage Conditions and Expiry Date]
This product should be stored at room temperature in a dry place away from light, avoid contact with acid, alkali and other liquids, long-term storage will occur slow oxidation.
[Inspection method]
This product can be confirmed by X-ray powder diffractometer crystal results; Confirmation of element composition by energy dispersive X-ray detector; Homomorphologic characterization was used to characterize the particle morphology. And the particle size distribution was evaluated by laser particle size analyzer.
[Safety Protection]
1. Health hazards
Hazard type: non-hazardous chemicals Chemical type: ceramic powder;
Invasion route: inhalation, ingestion;
Health hazards: the dust irritates the eyes, and oral administration irritates the gastrointestinal tract.
2. First aid measures
Skin contact: Take off the contaminated clothing and rinse the skin thoroughly with flowing water.
Eye contact: Lift eyelid and rinse with plenty of running water or normal saline for at least 15 minutes;
Inhalation: quickly leave the site to a place with fresh air;
Ingestion: drink enough warm boiled water to induce vomiting and seek medical treatment;
3. Ignition and explosion characteristics and fire protection
Flammability: non-flammable;
Registrant/Manufacturer Name: Jilin Yiyi Technology Co., LTD
Residence/Production address: Beihu Science Park, New District, Changchun City, Jilin Province
Contact information: +86-18043212860
After-sales service unit Name: Jilin Yiyi Technology Co., LTD