Panduan komprehensif untuk pemilihan dan parameter teknis trafo tipe kering: 10 poin-poin penting yang kemungkinan besar diabaikan oleh para insinyur dan pengadaan

Dalam proyek praktis, the problem of selecting the wrong model for transformator tipe kering is very common.

Kapasitasnya mencukupi, namun kenaikan suhu melebihi standar;
Pencocokan tegangan, but noise is not qualified;
Parameter compliance, but overseas acceptance failed.

This article will delve into the most critical but easily overlooked technical details of dry-type transformers from the perspective of engineering selection.

1.Capacity selection: You cannot just look at kVA

1.1 Continuous load and intermittent load

Dry-type transformers are highly sensitive to ambient temperature and require appropriate derating in the following scenarios:

• high altitude
• high temperature environment
• Closed computer room

1.2 Overload Capacity Assessment

The short-term overload capacity of epoxy cast transformator tipe kering is significantly weaker than that of oil immersed transformers, and the load curve needs to be evaluated in advance.

2.Voltage level and wiring group

Common combinations:

• 10persegi panjang / 0.4persegi panjang
• 20persegi panjang / 0.4persegi panjang

The wiring group should match the system protection logic, seperti:

• Dyn11
• Ya0

3.Insulation level and temperature rise design

Saat memilih, consider long-term operating temperature rather than short-term limits.

4.Selection of cooling method

SEBUAH: Pendinginan alami, kebisingan rendah
DARI: Forced air cooling, capacity can be increased by 30-40%

But the reliability and maintenance of the fan also need to be taken into consideration.

5.Tingkat pelepasan sebagian

High quality dry-type transformers typically require:

• Partial discharge ≤ 10 pC

This is one of the core indicators for overseas project acceptance.

6.Noise control

Noise often becomes a veto in data center and commercial building projects.
Attention should be paid to:

• core structure
• Shock absorption design
• Installation foundation

7.Protection level and environmental adaptability

Common levels:

• IP00 (dalam)
• IP23/IP31 (anti drip, anti foreign object)

8.Energy efficiency and loss indicators

Critical loss parameters:

• kehilangan tanpa beban
• kehilangan beban

The EU and North American markets have particularly strict requirements for this.

9.Standar, certifications, and documents

Common requirements:

• IEC / IEEE
• CE
• ISO system documents

10Hidden risks of export projects

Wooden crate packaging standard
Shipping moisture prevention
Technical document language

Dry-type transformers are not necessarily “the better the parameter table, the safer it is”, but rather highly coupled system equipment with application scenarios.
The truly professional selection is a comprehensive reflection of technical understanding, engineering experience, and standard awareness.

Luoyang Datang Energi Technology Co., Ltd. adalah perusahaan teknologi tinggi yang mengintegrasikan R&D, manufaktur dan penyediaan peralatan listrik seperti trafo, komponen energi baru, lemari distribusi dan inverter. Dengan inovasi teknologi sebagai intinya, kami fokus pada penciptaan solusi kelistrikan dengan keandalan dan kinerja tinggi untuk melayani pelanggan global. Dengan sistem kendali mutu yang ketat dan sertifikasi berstandar internasional, kami terus menghasilkan produk unggulan dan memungkinkan pelanggan membangun sistem tenaga listrik yang aman dan stabil.