100kVA 20kv 0.4kv Earthing Transformer Grounding Transformers

• Customization: Available
• Application: Power, Electronic, Instrument, Lighting, Rectifier, Audio, Power, Electronic, Instrument, Lighting, Rectifier, Audio, Power Plant
• Phase: Three
• Model NO.: SL11 100/20/0.4KV
• Core: Amorphous Alloy Transformer
• Cooling Method: Oil-immersed Type Transformer
• Winding Type: Customized
• Certification: ISO9001-2000, ISO9001, ISO9001-2000, ISO9001
• Usage: Single-phase Transformer, Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer, Single-Phase Transformer, Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer, Earthing Transformer
• Frequency Characteristics: 50Hz 60Hz
• Shape of Core: Ring
• Brand: Ville
• Transport Package: Nude, Wooden Case
• Specification: IEC, CE
• Trademark: Ville industrial
• Origin: China
• HS Code: 8514300020
• Production Capacity: 100 Sets Per Year

Product Description

Grounding Transformers are designed to provide an artificial, neutral point for ungrounded three phase power systems.

During the line-to-ground faults, grounding transformers provide an easy path to ground faults, thus limit the fault currents and transient over-voltages.

Grounding transformers normally carry short-circuit ground current until the circuit breaker clears the fault. Therefore, they have short time ratings.

The kVA rating of a earthing transformer depends on the normal line-to-neutral voltage and the fault current value for a specified time, such as seconds to minutes.

Voltage	Up to 22kV
Operating Voltage	20kV
Standard	IEC 60076-6 or Equivalent
Rated Neutral current
Power rating	100kVA
Voltage Rating HV/LV	20/0.4kV
Cooling methods	ONAN
Frequency	50 Hz
Installation	Outdoor
Zero sequence impedance	19 Ohm
No phase	3
Voltage regulation range (No of Taps)	5
Temperature rise for the windings	As per IEC standard
Winding material	Copper
Insulation level	According to the rated voltage (IEC70076-3)
Impedance Voltage	5.5 %
Ambient temperature	-40 to +40 °C, other temperatures on request
Vector group	ZNyn11
Voltage regulation Range (No.of Taps)	5
Bushing	porcelain
Creepage	31mm/kV
Breather	Silica gel

Please take a brief moment and use the "Check List" below to gather the following (13) basic pieces of Grounding Transformer information:

 

1. Winding configuration; either Zig Zag or Two Winding.
2. Voltage(s) and BIL; The line-to-line value of the system to which the grounding transformer is to be connected. If a two winding grounding transformer is required, the secondary voltage must be provided as well.
3. Continuous neutral current.
4. System available neutral fault current and duration; example 500 amps for 10 seconds, 4000 amps for 2 seconds.
5. Zero Sequence impedance percentage.
6. Per phase impedance in Ohms.
7. Per phase resistance in Ohms.
8. X/R ratio; typically a value > 4.0.
9. Special application conditions; i.e. 2000 MASL, etc.
10. Enclosure construction or NEMA designation preference; i.e. high security compartmentalized padmounted, standard ventilated or substation design, special paint color, etc.
11. Terminal connectivity preference; i.e. dead front, live front, conventional terminals, etc.
12. Winding material; CU if not specified.
13. Transformer temperature rise; 150° C if not specified.

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