JDZX9-20, JDZX11-20 Indoor Epoxy Cast-Resin Voltage Transformer

Product Overview

Functional Definition

The JDZX9-20 and JDZX11-20 series are indoor epoxy cast-resin voltage transformers designed for voltage measurement, energy metering, and relay protection in AC power systems with rated voltages up to 24kV. These single-phase transformers utilize electromagnetic induction principles to provide isolated secondary voltage signals proportional to primary system voltage.

The epoxy resin construction provides excellent dielectric strength, moisture resistance, and mechanical durability, making these transformers suitable for indoor switchgear applications in industrial and utility power distribution networks.

Key Features

• Indoor epoxy cast-resin insulation for superior dielectric performance
• Single-phase design for flexible system configurations
• Multiple accuracy class options: 0.2, 0.5, 1.0, 3P, 6P
• Rated voltages: 15kV and 20kV system applications
• Compliant with GB20840.3-2013 and IEC 61869-3:2011 standards
• Compact arch-type design for space-efficient installation
• Weight: approximately 42.4 kg

Product Display

Technical Parameters

Rated Voltage (kV)	Rated Insulation (kV)	Accuracy Class / Output (VA)	Max Output (VA)
15/√3	17.5/55/105	0.2-30 / 0.5-100 0.5-80 / 1.0-100 3P-30 / 6P-100	600
20/√3	24/65/125	0.2-30 / 0.5-100 0.5-80 / 1.0-100 3P-30 / 6P-100	600
15/√3 : 0.1/√3 : 0.1/√3 : 0.1/3	17.5/55/105	0.2/0.5/3P-30/30/100	600
20/√3 : 0.1/√3 : 0.1/√3 : 0.1/3	24/65/125	0.2/0.5/6P-30/30/100	600

General Specifications:

• Rated Frequency: 50Hz / 60Hz
• Ambient Temperature: -5°C to +40°C
• Standards: GB20840.3-2013, IEC 61869-3:2011
• Overall Dimensions: 380 × 225 × 312 mm (L × W × H)
• Weight: approximately 42.4 kg

Note: 1. Each transformer can only satisfy one accuracy class and corresponding rated output. 2. If parameters required by the user exceed the above ranges, specifications can be determined through consultation with the manufacturer.

Installation & Wiring

The JDZX9-20 and JDZX11-20 voltage transformers feature an arch-type design with metal base plate mounting. The primary winding connects directly to the high-voltage system, while secondary windings provide isolated voltage outputs for metering and protection devices.

Overall Dimensions

Wiring Diagram

Installation Steps:

1. Mount the transformer to a flat surface using the base plate mounting holes (4×M6)
2. Connect primary terminals to the high-voltage system
3. Connect secondary windings to metering and protection devices
4. Ensure proper grounding through the M8 grounding terminal

Wiring Configurations:

• Star (Y) connection for three-phase systems with grounded neutral
• Open delta connection for residual voltage detection
• Multiple secondary winding options for simultaneous metering and protection

FAQs

Q1: JDZX9-20 kuchlanish transformatori qanday maqsadlarda ishlatiladi?

JDZX9-20 va JDZX11-20 seriyali yopiq epoksidli quyma kuchlanish transformatorlari 24kV gacha bo’lgan o’zgaruvchan tok tizimlarida kuchlanishni aniq o’lchash, elektr energiyasini hisobga olish va rele himoyasi tizimlarini ta’minlash uchun ishlatiladi. Ular sanoat korxonalari va kommunal quvvat taqsimot tarmoqlaridagi yopiq kommutatsiya qurilmalarida (KRU) keng qo’llaniladi. Epoksid smola konstruktsiyasi yuqori dielektrik mustahkamlikni ta’minlaydi.

Q2: Ushbu transformatorlar uchun qaysi aniqlik sinflari mavjud?

Ushbu bir fazali transformatorlar turli aniqlik sinflari va chiqish quvvati variantlarini taklif etadi. Mavjud aniqlik sinflariga 0.2, 0.5, 1.0, 3P va 6P kiradi. Har bir transformator faqat bitta aniqlik sinfini va unga mos keladigan nominal chiqish quvvatini qondira olishini esda tuting. Maksimal chiqish quvvati 600 VA ni tashkil qiladi. Agar foydalanuvchi talablari ushbu diapazondan oshib ketsa, ishlab chiqaruvchi bilan maslahatlashing.

Q3: JDZX11-20 transformatorini o’rnatishda qanday konstruktiv yechimlar qo’llaniladi?

JDZX9-20 va JDZX11-20 modellari ixcham arka (arch-type) dizayniga ega bo’lib, cheklangan joylarda samarali o’rnatish imkonini beradi. Transformatorning umumiy o’lchamlari 380 × 225 × 312 mm ni tashkil qiladi va og’irligi taxminan 42.4 kg ga teng. Ular ichki muhitda, ya’ni yopiq kommutatsiya qurilmalarida ishlatilish uchun mo’ljallangan. Atrof-muhit harorati -5°C dan +40°C gacha bo’lgan sharoitlarda ishlashi kafolanadi.

Q4: Kuchlanish transformatorlari qachon yopiq kommutatsiya qurilmalarida o’rnatiladi?

Ular asosan yopiq muhitda, ya’ni yopiq kommutatsiya qurilmalarida (KRU) o’rnatiladi va ishlatiladi. Transformatorlarni o’rnatish uchun atrof-muhit harorati -5°C dan +40°C gacha bo’lgan sharoitlar talab qilinadi. Tashqi ochiq muhitda yoki haddan tashqari yuqori namlik va changli joylarda o’rnatish tavsiya etilmaydi, chunki ularning epoksidli izolyatsiyasi aynan yopiq sanoat va kommunal tarmoqlar uchun optimallashtirilgan.

Q5: Maxsus loyihalar uchun maxsus texnik parametrlarni so’rash mumkinmi?

Ha, agar sizning loyihangiz uchun zarur bo’lgan parametrlar standart katalogdagi diapazonlardan tashqarida bo’lsa, maxsus sozlamalarni amalga oshirish mumkin. Standart modellarda nominal kuchlanish 15/√3 kV va 20/√3 kV tizimlar uchun mo’ljallangan. Qo’shimcha yoki o’zgartirilgan texnik talablar, masalan, boshqa izolyatsiya darajalari yoki chiqish quvvati, to’g’ridan-to’g’ri ishlab chiqaruvchi bilan maslahatlashish orqali individual ravishda belgilanadi.

Q6: Nima uchun ushbu transformatorlarda epoksidli quyma smola izolyatsiyasi ishlatiladi?

Epoksidli quyma smola konstruktsiyasi yopiq sharoitda ishlash uchun eng yaxshi himoya va ishlash ko’rsatkichlarini taqdim etadi. U yuqori dielektrik mustahkamlikni ta’minlaydi, namlikka chidamlilikni oshiradi va mexanik shikastlanishlarga qarshi turadi. Bu material transformatorning uzoq muddatli ishonchliligini ta’minlaydi va qo’shimcha texnik xizmat ko’rsatish ehtiyojini kamaytiradi. Shuningdek, u sanoat va kommunal tarmoqlardagi yopiq kommutatsiya qurilmalari uchun optimal yechim hisoblanadi.

Q7: 15kV va 20kV modellar uchun izolyatsiya darajalari farq qiladimi?

Ha, tizim kuchlanishiga qarab izolyatsiya darajalari farq qiladi. 15/√3 kV modellar uchun nominal izolyatsiya darajasi 17.5/55/105 kV ni tashkil qiladi. 20/√3 kV modellar uchun esa yuqoriroq izolyatsiya talab qilinadi va u 24/65/125 kV ga teng. Bu ko’rsatkichlar transformatorning yuqori kuchlanishli impulsli va qisqa muddatli kuchlanishlarga bardosh berish qobiliyatini kafolatlaydi.