FOB Price
Get Latest Price3000 ~ 5000 / Acre
|Minimum Order
Place of Origin:
-
Price for Minimum Order:
Minimum Order Quantity:
1 Set
Packaging Detail:
wooden case
Delivery Time:
30days
Supplying Ability:
1 Set per Year
Payment Type:
T/T
連絡先担当者 Ms. lily
No.118 West Fuxing Road,Baoding city, Hebei province,China, Baoding, Hebei
stainless steel resistor in door neutral earthing Resistor (NER)
Application:
Neutral
Grounding Resistor iscurrent limiting electrical
equipment which
connects between neutral point of the generator, transformer and
the earth. When the grid line fails, the voltage of power supply
neutral point will be shifted, especially in the cable power grid
system, capacitive current to ground is relatively large. When the
current is greater than the regulated value, it will produce arc
grounding overvoltage, so that the non-fault phase-to-ground
voltage increase dramatically, which damage the insulation of the
equipment, form a two-point or multi-point ground short circuit and
cause blackouts accident.
The purpose of using neutral
grounding resistor is to inject the resistive current into the
point of failure, which will make the grounding fault current
become the nature of resistance-capacitance, and decrease the phase
difference with the voltage. Over-voltage is limited at certain
level in order to improve the sensitivity of relay protection
equipment and to achieve the trip, quickly find fault line and
standby switch, so that it can effectively protect the normal
operation of the system.
Neutral grounding device is applied to the neutral grounding system
of voltage level from 0.4kV to **0kV distribution network. It has
been widely used in the substation or power plant in the
electricity system. The application in enterprise power system such
as mining, petrochemical and others have become increasing
widespread. It has significantly improved system reliability and
safe operation.
Characteristics:
• Big power, highcurrent
withstanding:
1~***0A
• Wide range for voltage: 0.*8kV~**0Kv
• Allowable rated time: 5S,*0S,*0S,*0S,*0MIN,continuously
• Wide range for resistance value: 0.*1~***0Ω
• Little maintenance, ease of dismantlement and
replacement
• Compact framework, ease of installation
• Protection degree for enclosure: IP*0~IP*5,Available
for indoor and outdoor
• Switches,
breakers, CT, PT and etc can be subsidiarily
installed
Optional Accessories
• Intelligent monitoring device: monitor current, temperature
and number of failures
• Isolated switch
• Current transformer, voltage transformer
• Temperature and humidity controller and heater
• Lighting in the cabinet
ApplicableStandards
The design of the product complies with the flowing standards:
DL/*******1 Neutral Grounding Resistor in Power Distribution
IEC**6 Dry-Type Power Transformer
DL/T*******7 Overvoltage Protection and Insulation Co-ordination of AC
Electrical Equipments
IEC***1 Experimental Technique of High Voltage
GB********7 Current Transformer
IEC****9:***1 Enclosure Protection Degree (IP code)
IEEE******2 Technique Terms and Experiment of Neutral Grounding Device
IEC****1 Insulation Co-ordination of Transmission and Distribution
Device of High Voltage.
DL/T*******6 Common Specifications for Purchasing High Voltage
Switch Equipment.
GB*********1 Electrical Equipments Hand-over and Test Standard of
Electrical Device Installation Project.