MRD-BJ Transformer Neutral Ground Resistor

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Tianjin
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TT OR LC
Min Order Qty:
1 unit
Supply Capability:
30 unit/month

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Product Description:

Neutral Grounding Resistor is used to protect power transformers, power generators and other associated equipment in your power systems against 50/60 Hz faults (short circuit) and transient phenomena (lightning).

Applicable Standards  
The design of the product complies with the flowing standards: 
DL/780-2001   Neutral Grounding Resistor in Power Distribution 
IEC726           Dry-Type Power Transformer 
DL/T620-1997  Overvoltage Protection and Insulation Co-ordination of AC  Electrical Equipments 
IEC60-1         Experimental Technique of High Voltage 
GB1208-1997    Current Transformer 
IEC60529:2001  Enclosure Protection Degree (IP code) 
IEEE32-1972    Technique Terms and Experiment of Neutral Grounding Device 
IEC60081       Insulation Co-ordination of Transmission and Distribution Device of High Voltage. 

DL/T593-1996   Common Specifications for Purchasing High Voltage  
              Switch Equipment. 
GB50150-1991  Electrical Equipment’s Hand-over and Test Standard of 
                Electrical Device Installation Project.

Typical Technology Parameters

Product Model

System Voltage

kV

Rated Current

A

Current Flowing Time in short TimeS

Rated Resistor Value Ω

(±5%

Insulation Withstanding Voltage kV

8/20μS

Thunder Stroke

1min Power Frequency

MRD-BJ-6/36.4

6.3

100

10

36.4

60

32

MRD-BJ-6/18.2

6.3

200

10

18.2

60

32

MRD-BJ-6/9.09

6.3

400

10

9.09

60

32

MRD-BJ-6/6.06

6.3

600

10

6.06

60

32

MRD-BJ-10/15.16

10.5

400

10

15.16

75

42

MRD-BJ-10/10.10

10.5

600

10

10.10

75

42

MRD-BJ-10/7.57

10.5

800

10

7.57

75

42

MRD-BJ-10/6.06

10.5

1000

10

6.06

75

42

MRD-BJ-35/20.20

35

1000

10

20.20

185

95

MRD-BJ-35/10.10

35

2000

10

10.10

185

95

 

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Q:Insulation level of electrical equipment used in neutral point grounding system shall be
For example, 220kV transformer (YNYnd11) insulation level high voltage side is LI950AC395-LI400AC200, the front half part (head) of the lightning impulse voltage and power frequency withstand voltage were significantly higher than that of the second part (neutral side). According to the power frequency withstand voltage needs to achieve 1.6 times the rated voltage requirements, the first end of the line voltage is considered in accordance with 220kV, the neutral point according to the phase voltage (127kV) considerations. But there are some places are fully insulated, that is, according to the line voltage calculation.The triangle connection must be considered by the line voltage. Overall, C is definitely right.
Q:What is the double name of power equipment?
Each power device has a Chinese name and numberSuch as: Zhang Road 905 switch, Zhang road is his Chinese name, and the 905 is his numberThe line is the same
Q:What are the main interference sources of the two power system
The main source of disturbance in power system are: high voltage isolation switch and circuit breaker operation; short circuit and lightning system; partial discharge; two switch operation system; voltage load change and faults when the power grid has sag, interruption, unbalance, harmonics and frequency variation of power frequency and harmonic electric field and harassment; the magnetic field generator and transformer; transmission circuit in the surrounding electric field and magnetic field; high frequency conduction disturbance and radiation disturbance automation equipment, radio equipment; natural phenomena such as lightning, electrostatic discharge, geomagnetic disturbance and dry harassment pulse generated by nuclear power.
Q:How to run a company that operates electric equipment
Or do not do other electric power equipment, but the company's other power products to pull the business on the line, at the beginning of the sale to the quality of good, and then the price is low, a long time there is profit, customers will have.
Q:What specific enterprises and units are used to test the power of the equipment ah
The other really did not ~ ~ ~ ~ ~What do you mean by electrical testing equipment??? High? Low?
Q:Ask the expert about the design of the power system diagram, 6kV side of the electrical equipment how to supply
6kV equipment directly in the 6kV bus out of the lead, do not consider the capacity, it does not affect the use of 380V equipment
Q:How to handle the qualification test, what kind of power equipment
Acceptance; staff review the material you submitted to meet the requirements, may be 10 working days.(three) after acceptance, on-site verification. Staff to review your outfit team.
Q:Two power equipment; I was engaged in a number of more than a few cabinets to know more about the two
The common measurement and control cabinet are generally some common control signals such as AC / DC screen, knife position, device power loss and telemetry some voltage and current value, there are no specific remote control, measurement and control device of equipment access to public control
Q:What is the power system and the power grid 2 what is the rated voltage of electrical equipment
The electric power network is referred to as the "power grid", which refers to the connection between the bus from the booster station of the power plant to the bus of the substation.
Q:Electrical equipment classification
Current carrying conductor and gas insulated equipment. Such as bus, power cable, insulator, wall bushingA device that limits over current or over voltage, such as current limiting reactors, surge arresters, etc.Transformer equipment: make a circuit of the high voltage and large current is reduced, for measuring and relay protection devices, such as the voltage and current transformer protection in order to ensure the normal operation of an electrical equipment, the operation status monitoring, measurement, control and adjustment of the equipment is called two electrical equipment. There are a variety of measuring meter, a variety of relay protection and automatic devices, DC power equipment, etc..

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