ZMJ POWER

dry Type Transformer

Dry-type transformers are preferable for indoor installations, especially in locations where the risk of fire or environmental concerns related to oil leakage is a significant factor.

Technical Parameters

Phrase	Three-phase
Rated Capacity	UP TO 20000 KVA
Rated Voltage	UP TO 40.5 KV
Secondary Voltage	0.4 KV
Frequency	50Hz / 60Hz
Winding Material	Copper / Aluminum
Iron Core	Cold-rolled Silicon Steel Sheet
Insulation Material	Resin
Standard	GB1094.1 (IEC60076)
Connection Symbol	Dyn11/Yyn0/YNd11
Tapping Range	±2×2.5%, ±5%
Insulation Class	F
Cooling Type	AN / AF
Running Environment	Highest temperature: +40℃ Highest daily average air temperature: +30℃ Highest annual average air temperature: +20℃ Lowest outdoor air temperature: -45℃ Altitude: ≤4000m
Protection Enclosure	IP00 – IP54

Product Details

Questions and Answers

Dry-type transformers offer several advantages compared to oil-filled transformers:

Safety: One of the significant advantages is safety. Dry-type transformers eliminate the risk of oil-related hazards, such as leaks, spills, or fires associated with oil-filled transformers. This makes them safer for indoor applications and environmentally sensitive areas.
Environmental Friendliness: Dry-type transformers are more environmentally friendly as they do not use oil as an insulating medium. They eliminate the potential environmental impact caused by oil leaks or spills, making them a greener choice.
Maintenance: They generally require less maintenance compared to oil-filled transformers. There’s no need to monitor or replace oil, and there’s a reduced risk of insulation degradation due to oil contamination.
Fire Resistance: Dry-type transformers are inherently more fire-resistant than oil-filled transformers due to the absence of flammable liquid insulation. This property makes them suitable for installations where fire safety is a primary concern.
Installation Flexibility: They are suitable for indoor installations and areas with limited ventilation due to their self-cooling design, eliminating the need for oil containment or elaborate ventilation systems.
No Oil Containment Requirements: Dry-type transformers do not require additional infrastructure for oil containment or the associated maintenance and safety measures.
Minimal Risk of Contamination: With no oil used in the insulation, there’s minimal risk of contamination of surrounding equipment or the environment due to oil leaks or spills.
Odorless and Clean Operation: They operate without oil, eliminating any associated odors or concerns related to oil spillage or leakage.
Suitability for Specific Applications: Dry-type transformers are often preferred for applications where fire safety, environmental concerns, or specific regulations restrict the use of oil-filled transformers.
Longer Lifespan: They can have a longer lifespan compared to oil-filled transformers due to reduced insulation degradation caused by oil contamination.

These advantages make dry-type transformers a preferred choice in various applications, especially in indoor installations, environmentally sensitive areas, or locations where safety and environmental concerns take precedence.

Choosing dry-type transformers over oil-filled transformers depends on specific circumstances and considerations:

Indoor Applications: Dry-type transformers are preferable for indoor installations, especially in locations where the risk of fire or environmental concerns related to oil leakage is a significant factor.
Fire Safety: In areas where fire safety is a primary concern, such as residential buildings, hospitals, schools, or commercial spaces, dry-type transformers are often preferred due to their reduced fire risk.
Environmental Considerations: If there are strict environmental regulations or concerns about potential oil leaks or spills, dry-type transformers are a more environmentally friendly option as they don’t contain oil.
Minimal Maintenance: Dry-type transformers generally require less maintenance compared to oil-filled transformers, making them suitable for applications where minimal upkeep is desired.
Indoor Spaces with Limited Ventilation: Dry-type transformers operate without oil and are suitable for spaces where adequate ventilation or oil containment measures are challenging to implement.
Sensitive Areas: In locations where cleanliness and absence of oil-related odors are important, such as in clean rooms or laboratories, dry-type transformers are often preferred.
Lower Power Requirements: For lower power applications or smaller installations where the compact size and lower power capacity of dry-type transformers are sufficient.
Compliance with Regulations: In regions or industries where regulations favor or specify the use of dry-type transformers due to safety or environmental concerns.

When selecting a transformer, assess the specific application requirements, environmental considerations, safety regulations, and the operational context to determine whether a dry-type transformer aligns with the needs and constraints of the project.

Routine Test
Measurement of winding resistance
Measurement of voltage ratio and check of phase displacement
Measurement of short-circuit impedance and load loss
Measurement of no-load loss and current
Separate-source AC withstand voltage test
Induced AC withstand voltage test
Partial discharge measurement

Type Test
Lightning impulse test
Temperature-rise test

Special Test
Partial discharge measurement
Measurement of sound level
Short-circuit test

Oil Immersed Transformer:
650KVA＜ Rated Capacity ≤ 10MVA: 8504220000
Rated Capacity ≤ 650KVA: 8504210000

Dry Type Transformer:
Rated Capacity ＞ 500KVA: 8504349000
16KVA < Rated Capacity ≤ 500KVA: 8504339000

For orders of less than 5 transformers, we can usually deliver within 1 month. If the customer is particularly anxious or has special requirements, we can also handle it flexibly. Before signing a sales contract each time, we will agree on a delivery time with the customer based on the actual situation.