MRD-FD Neutral Grounding Transformer for 6kv to 20kv

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Product Description:

1,Brief Introduction to Product

1.1  Scope of Application

MRD-FD type neutral ground resistor cabinet is complete equipment specially used by generators in power plant which adopts high-resistance grounding for neutral. The voltage grade for generator mainly ranges from 6kv to 20kv. When one point of the stator grounds, the device is able to limit the grounding current at a reasonable value, and effectively restraint arc flash transient overvoltage associated with single-phase grounding.

1.2  Operation Environment

1,Applies to indoors.

2,Ambient temperature: between -40 and +40 centigrade.

3,The altitude shall not exceed 3000m.

4,Relative humidity be or lower than 95%(25 centigrade)

5,Power grid frequency:58-62Hz (60Hz System), 48-52Hz (50Hz System)

6,The air at the installation site shall be free from chemical corrosion, vapour or explosive dust

2.1  Parameters of Grounding Transformer

Insulation class:H

Temperature rise:≤100K

Cooling:AN

Protection Level: for paper-insulated dry type grounding transformer, the PI is divided into IP00 (no enclosure), IP20, and IP23 (with enclosure) .

Insulation level, impedance voltage on-load loss and no-load loss are according to relevant national standards.

Insulation resistance testing: high voltage-low voltage and to earth≥300MΩ,and low voltage-earth≥100MΩ.

 

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Q:I would like to ask the power experts, according to the annual additional electricity, installed capacity
At least the national research institutions to do, here is about not a conclusion. If such a conclusion, it also belongs to the commercial classified data, not just to show people.
Q:In order to obtain the qualification test of electric equipment
The provincial electricity supervisor application; can only apply for five (10KV and below) or level Four (35KV and below) qualification, the first level of qualification can only apply for the first four to rise
Q:The problem of electric power equipment withstand voltage
The air is easy to produce ionization, so it is necessary to improve the insulation level and increase the gap of high voltage electrical apparatus
Q:What are the business scope of Electric Power Engineering Co., Ltd.
The manufacture, development and sale of electric power equipment, mechanical and electrical equipment, high and low voltage electrical equipment, instruments and meters, electronic products, design, construction and installation of electrical engineering, mechanical and electrical products, metal materials sales.
Q:Pre checking and checking of goods in power system
Pilot: the full name of the preventive test, generally in terms of a power system equipment, in order to find in the operation of equipment problems, to prevent the occurrence of accidents or damage to equipment, equipment for inspection, testing or monitoring, including oil sampling test or gas samples. The preventive test is the operation of power equipment and to maintain an important aspect of the work
Q:Private enterprises must be free transfer of power facilities
4, in the public substation by the user to invest in the construction of power supply equipment, such as transformers, communications equipment, switches, knife gate, etc., by the unified management of power supply enterprises. Prior to the completion of commissioning, the two parties shall sign an agreement on the operation, maintenance, repair and spare parts.5, temporary electricity and other properties of the power supply facilities, in principle, by the owner of the property rights operation and maintenance management, or by the two sides agreed to negotiate and sign an agreement.Three, in fact, property rights is a "negotiation" thing, to see both sides of "power supply contract" about how the past, users are not willing to power assets, because of electricity on the line, you want the assets, after the electrical accidents and other things, will be responsible for asset owners repair, this is the main reason of users not assets.
Q:The relationship between primary equipment and two equipment in power system
Including generator, power transformer, circuit breaker, isolating switch, power bus, power cables and transmission lines, etc..
Q:In power system, the general conditions for the selection of electrical equipment are
Electrical equipment to be as reliable as possible, must be selected according to the normal working conditions and the short circuit conditions for a variety of checks (such as thermal stability check and dynamic stability check)For some equipment also need to check the special items, such as circuit breakers and fuses to check the ability to break the current, the current limiting reactor to check the normal voltage loss and bus residual voltage, etc..
Q:What is the redundancy of electrical equipment
Redundancy is a part of the system that is repeatedly configured. When the system is in trouble, the redundant components are involved in the work of the faulty components, thereby reducing the failure time of the system.
Q:The two devices of the power system have those
Internal equipment:1, measuring meter, such as voltmeter, ammeter, power meter, electric energy meter for measuring electrical parameters in the circuit.2, insulation monitoring device.3, control and signal device.

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