6kV 6.3kV 6.6kV 10kV 10.5kV 11kV Neutral Grounding/earthing Transformer Dry Type Power Transformer direct supply

Name: 6kV 6.3kV 6.6kV 10kV 10.5kV 11kV Neutral Grounding/earthing Transformer Dry Type Power Transformer direct supply
Brand: Rockwill Electric GROUP Co., Ltd
SKU: 1259
Price: 1.99 USD
Availability: InStock

Rockwill Electric GROUP Co., Ltd

16yrs 700++ staff 108000m²+m² US$150000000+ China

Rockwill Electric GROUP Co., Ltd

16yrs 700++ staff 108000m²+m² US$150000000+ China

Attributes

Description

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Supplier

Key attributes

Brand	ROCKWILL
Model NO.	6kV 6.3kV 6.6kV 10kV 10.5kV 11kV Neutral Grounding/earthing Transformer Dry Type Power Transformer direct supply
Rated voltage	11kV
Rated frequency	50/60Hz
Rated capacity	630kVA
Series	DKSC

Product descriptions from the supplier

Description

Description

As the trailblazer and China’s first dedicated original manufacturer in the earthing transformer domain, decades of intensive technical expertise accumulation have furnished us with formidable strength and even established the primitive standards for industrial development. From pioneering breakthroughs in core technology R&D to large-scale mass production and delivery, we have constructed a full-chain independent ecosystem. Leveraging leading and stable product performance along with ultra-reliable quality, we have emerged as a trusted preferred choice in the power grid construction sector.

6kV 6.3kV 6.6kV 10kV 10.5kV 11kV Neutral Grounding/earthing Transformer Dry Type Power Transformer with epoxy resin casting offer excellent insulation, fireproof and moisture-proof capabilities. By establishing neutral points, they efficiently connect arc suppression coils or grounding resistors to quickly suppress grid grounding fault currents, enhancing power supply reliability. Suitable for 10kV/35kV distribution networks, data centers, commercial buildings, etc.

Product Advantages:

Designed to excel in demanding power distribution scenarios, our transformers integrate cutting-edge technology to deliver unmatched reliability and performance.

Ultra-low Partial Discharge: With a partial discharge level ≤ 10 pC, our transformers minimize electrical stress and insulation degradation, ensuring stable long-term operation and reducing the risk of premature failure.
Extreme Cold Adaptability: Capable of operating at low temperatures down to -25°C, these transformers maintain reliable performance in harsh environments, making them ideal for cold regions and outdoor installations.
Superior Performance Classifications: Rated at E3 (Exceptional Aging Resistance), C3 (High Contamination Resistance), and F1 (Low Noise Emission), our products meet the highest industry standards for durability, adaptability, and environmental compatibility.
Minimal Temperature Rise: Engineered to achieve a low temperature rise (100K - 125K) even under heavy loads, these transformers optimize energy efficiency, extend service life, and reduce maintenance requirements.
Robust Electrical Tolerance: Designed with high impulse voltage withstand capabilities, our transformers can endure sudden electrical surges and transient overvoltages, while their exceptional short-circuit tolerance ensures safe operation during fault conditions, safeguarding both equipment and power systems.

Main technical specifications

The following table details the key technical specifications of the product, comprehensively covering electrical performance, mechanical characteristics, and dimensional parameters to provide a clear reference for technical selection and application scenarios.

Number of phases	Three
Input voltage	10kV 11kV 22KV 33kV 34.5kV 35kV
frequency	50Hz, 60Hz
use	power transformer
application	Power transformers
Product name	Epoxy cast dry -type transformer
material	100% copper
Cooling method	Free air cooling/AF
Output voltage	440V, 460V, 230V
Number of coils	Three Windings
Coil structure	round coil
type	Dry
frequency	50Hz
authentication	ISO CCC IEC
customize	accept

Rated capacity (kVA)	Voltage combination (kV)			Connect the group symbol	No-load loss (W)	Load loss of heat resistance class under different insulation (W)			No-load current %
Rated capacity (kVA)	H.V.	High Voltage Taps %	Length	Connect the group symbol	No-load loss (W)	130℃(B)(100℃)	155℃(B)(120℃)	180℃(B)(145℃)	No-load current %
30	6 6.3 6.6 10 10.5 11	±5 ±2×2.5	0.4	Yyno Dyn11	130	605	640	685	4.0
50					185	845	900	965
80					250	1160	1240	1330
100					270	1330	1415	1520
125					320	1565	1665	1780
160					365	1800	1915	2050
200					420	2135	2275	2440
250					490	2330	2485	2665
315					600	2945	3125	3355
400					665	3375	3590	3850
500					790	4130	4390	4750
630					910	4975	5290	5660
630					885	5095	5365	5760	6.0
800					1035	5830	6265	6715
1000					1205	6885	7315	7885
1250					1420	8190	8720	9335
1600					1665	9945	10555	11320
2000					2075	12240	13005	14005
2500					2450	14535	15445	16605

Usage Conditions

Grounding System Compatibility
Suitable for ungrounded or low-current grounded neutral systems, and can be used in conjunction with resistor cabinets and arc suppression coils.

Electrical Environment Requirements
Grid frequency: 50/60 Hz; short-time withstand current: ≤25 kA; continuous ground fault operation time: ≥2 hours.

Installation Environment Conditions
Ambient temperature: -5°C to +40°C

FAQ

Q: Do earthing/grounding transformers need to be equipped with protection devices, and what are the common types of protection?

Special protection devices need to be configured, because their faults may lead to the failure of the system grounding circuit, causing equipment damage or expanding the power outage range. Common protection types include: ① Overcurrent protection: targeting short-time overcurrent during faults, the action time limit matches the fault withstand time (for example, 30-second withstand level is suitable for 0-20 second action time limit); ② Zero-sequence current protection: monitoring abnormal zero-sequence current and distinguishing between normal unbalanced current and ground fault current; ③ Temperature protection: monitoring oil temperature for oil-immersed type and winding temperature for dry-type to prevent overheating damage; ④ Gas protection (only for oil-immersed type): detecting the gas content in oil to warn of internal discharge or overheating faults; ⑤ Overvoltage protection: preventing insulation breakdown caused by operating overvoltage or lightning overvoltage through parallel arresters. These protections need to cooperate with the system relay protection and meet the action logic requirements of the IEEE 32 standard.

Q: What are the differences in daily operation and maintenance focuses between oil-immersed and dry-type earthing/grounding transformers?

The focus of operation and maintenance varies due to differences in insulation cooling methods: ① For oil-immersed type, it is necessary to focus on monitoring oil quality (moisture, dielectric loss), oil level, and the operation status of the cooling system (such as ONAF fan start and stop), conduct regular oil chromatographic analysis, and investigate internal discharge hazards; ② For dry-type, it is necessary to focus on checking the insulation appearance of windings (whether there is cracking or fouling), environmental humidity (to avoid condensation), and temperature rise, conduct regular insulation resistance tests, and increase the cleaning frequency especially in humid or dusty environments. Both need to regularly verify the zero-sequence impedance value to ensure matching with the protection setting value.

Know your supplier

ROCKWILL

Rockwill Electric GROUP Co., Ltd
16yrs 700++ staff 108000m²+m² US$150000000+ China

Rockwill Electric GROUP Co., Ltd

16yrs 700++ staff 108000m²+m² US$150000000+ China

Online store

On-time delivery rate

Response time

100.0%

≤4h

Company overview

Workplace: 108000m²m² Total staff: 700+ Highest Annual Export(usD): 150000000

Workplace: 108000m²m²
Total staff: 700+
Highest Annual Export(usD): 150000000

Services

Business Type: Design/Manufacture/Sales

Main Categories: High Voltage Electrical Apparatus/Electric transformer

Whole life care manager

Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.

Negotiable

Pricing calculator

Model

DKSC-11-630

Warranty by

Whole life care manager

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.

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