Products Description
Our dry type transformer grounding uses a three-phase ZN,yn11 connection with F- or H-class insulation. Intelligent temperature control and forced ventilation can manage winding temperature under service conditions.
Technical Principle
The transformer creates an artificial neutral point for a system that otherwise has no accessible neutral. During a ground fault, zero-sequence current flows through the grounding path so the connected resistor or arc-suppression coil can limit or compensate fault curren
Product Features
The dry type transformer grounding avoids an oil-filled insulation system for indoor grounding service. The Z-connected primary provides the neutral point required by the grounding scheme. Temperature control and optional forced air support thermal management. IP20 and IP23 enclosure choices address different indoor protection needs.
Operating Conditions
The product shall be installed and operated within the ratings stated in the technical parameters. Key site requirements include: ambient temperature, humidity, and phase-voltage balance.; altitude, ambient temperature, humidity, and phase-voltage balance.; protection level.. Keep the installation area clean, adequately ventilated, free from corrosive gas and severe vibration, and provide the specified grounding, clearance, and power quality.
Product Parameters
|
Parameter |
Details |
|
Rated capacity |
100-5000 kVA |
|
Primary voltage |
13.8 ±2×2.5% kV or 33 ±2×2.5% kV |
|
Connection group |
ZN,yn11 |
|
Impedance voltage |
6-8% at 13.8 kV; 7-9% at 33 kV |
|
Insulation class |
F or H |
|
Cooling method |
AN or AF |
|
Enclosure protection |
IP20 or IP23 |
|
Ambient temperature |
-30°C to +40°C |
|
Altitude |
≤1000 m |
|
Grid voltage fluctuation |
≤±2×2.5% |
Product Advantages
- The dry type transformer grounding avoids an oil-filled insulation system for indoor grounding service.
- The Z-connected primary provides the neutral point required by the grounding scheme.
- Temperature control and optional forced air support thermal management.
- IP20 and IP23 enclosure choices address different indoor protection needs.
Main Applications
The dry type transformer grounding is used for indoor 13.8 kV or 33 kV distribution systems that need a neutral grounding point.
Typical locations include substations, industrial plants, mines, and renewable-energy stations.
The unit can work with resistor grounding or other neutral-treatment equipment.
Components
|
Part |
Function |
|
Z-connected winding set |
Creates the neutral point and carries grounding duty. |
|
Dry insulation system |
Provides F- or H-class winding insulation. |
|
Temperature controller |
Monitors winding temperature and controls alarms or fans. |
|
Protective enclosure |
Provides the selected IP20 or IP23 protection level. |
FAQ
Q: What information is needed for model selection?
A: Provide system voltage, required capacity, secondary load, connection group, and impedance requirement.
Q: What should be checked before installation?
A: Check indoor clearance, ventilation, altitude, ambient temperature, humidity, and phase-voltage balance.
Q: How can the device or system be integrated?
A: Alarm contacts and fan-control signals can be coordinated with the station control and protection design.
Q: Which options should be confirmed before production?
A: Confirm insulation class, enclosure grade, cooling method, taps, and temperature-control functions.
Hot Tags: dry type transformer grounding, China dry type transformer grounding manufacturers, suppliers, factory
