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Single phase transformer

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 Enhancing Reliability & Efficiency with Advanced Thermal Management and Electrical Solutions

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Product Overview

Compact single-phase transformer, high-efficiency conversion, widely applicable.

  • Single-phase power supply application: suitable for single-phase power input equipment.
  • High-efficiency conversion: provides high-efficiency power conversion, reduces losses and improves economy.
  • Compact design: small design, saves installation space, and adapts to a variety of installation environments.

Key Advantages

  • Ultra-Low No-Load Losses via Amorphous Core
    Amorphous-metal laminations reduce no-load (iron) losses by up to 60% compared to CRGO cores, delivering significant energy savings in lightly loaded or continuously energized applications.
  • Vacuum Pressure Impregnation (VPI) for Superior Insulation
    VPI-treated windings provide complete void-free resin encapsulation, enhancing dielectric strength, moisture resistance, and extending service life in high-humidity or corrosive environments.
  • Custom Tap-Changers for Precise Voltage Regulation
    On-load and off-load tap-changer options let you fine-tune secondary voltage in ±2.5 % steps without interruption, maintaining optimal output for sensitive loads like lighting, instrumentation, or UPS systems.
  • High Inrush Current Mitigation Designs
    Special “split-core” and interleaved winding topologies limit magnetizing inrush currents at energization, preventing nuisance tripping of upstream breakers and reducing mechanical stress on coils.
  • Low-Noise Acoustic Engineering
    Magnetic flux dispersion techniques and vibration-damping mounting brackets quiet core hum to below 25 dB(A), an essential feature in commercial, medical, or residential settings.
  • Embedded Thermal Protection & Diagnostics
    Built-in thermal sensors at hot-spot winding locations feed to remote monitoring systems, allowing real-time overload detection and predictive maintenance alerts before insulation degradation occurs.
  • Compact High-Flux Density Construction
    Optimized core stacking and high-grade silicon steel yield a 20–30 % smaller envelope compared to legacy designs, freeing panel or floor space in OEM machinery and electrical rooms.
  • Enhanced EMI/RFI Suppression
    Integrated electrostatic shields and line-filtering windings attenuate high-frequency noise and transient spikes, safeguarding downstream electronics and communication equipment.
  • Corrosion-Resistant Finishes & Enclosures
    Powder-coated steel or stainless-steel housings, plus class-H varnish on coils, ensure durability in outdoor, marine, or chemical-process environments without sacrificing thermal performance.
  • Eco-Friendly Dielectric Fluids
    In oil-cooled variants, biodegradable ester fluids replace mineral oil, offering a 30 °C higher flash point, improved fire safety, and reduced environmental impact in case of leaks.

Product Catagories

JBK 2 transformer

JBK2 Series: A cost-effective solution for basic control circuit applications. providing dependable performance with minimal maintenance requirements.

wdt_ID wdt_created_by wdt_created_at wdt_last_edited_by wdt_last_edited_at Model L (mm) W (mm) H (mm) A (mm) B (mm) KF F
1 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-63VA 84 94 92 64 ± 0.2 62 ± 0.2 46 15
2 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-100VA 96 105 105 84 ± 0.2 87 ± 0.2 58 15
3 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-160VA 96 110 105 84 ± 0.2 85 ± 0.2 58 15
4 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-250VA 120 100 122 90 ± 0.2 85 ± 0.2 58 15
5 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-400VA 120 115 122 90 ± 0.2 96 ± 0.2 7 2
6 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-500VA 150 110 145 122 ± 0.2 90 ± 0.2 7 2
7 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-630VA 150 128 145 122 ± 0.2 105 ± 0.2 7 2
8 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-800VA 168 125 155 138 ± 0.2 105 ± 0.2 9 2
9 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-1KVA 168 125 155 138 ± 0.2 105 ± 0.2 9 2
10 Kiva 09/07/2025 05:20 AM Kiva 09/07/2025 05:20 AM JBK2-1.6KVA 168 138 155 138 ± 0.3 116 ± 0.5 10 3
Model L (mm) W (mm) H (mm) A (mm) B (mm) KF F

JSG 3 Control transformers

JBK5 Series: Desiqned for advanced industrial environments, with improved aesthetics, safety features, and voltage stability for more demanding conditions.

wdt_ID wdt_created_by wdt_created_at wdt_last_edited_by wdt_last_edited_at Model Order number B max D max E max A C Hole diameter K F max Remarks
1 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-40. 63 4011-01-01 78 72 90 56±0.15 46±0.125 46 15
2 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-100 4011-01-03 84 75 96 64±0.15 62±0.15 46 15
3 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-160 4011-01-04 96 92 105 84±0.175 73.5±0.15 55 15
4 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-250 4011-01-05 96 100 104 84±0.175 85±0.175 58 15
5 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-400 4011-01-06 120 100 122 90±0.175 8510.175 58 2
6 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-500 120 110 122 90±0.175 96±0.175 58 2
7 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-630 4011-01-07 150 no 140 122±0.2 9010.175 7 2
8 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-800 4011-01-08 150 128 142 122±0.2 10510.2 7 2
9 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-1000 150 190 142 126±0.2 15210.2 7 3 Horizontal
10 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK5-1000 168 125 155 138±0.2 10510.2 9 2 Vertical
Model Order number B max D max E max A C Hole diameter K F max Remarks

JBK6 Control transformers

JBK6 Series: Built for harsh environments, featuring corrosion resistanceand protection against extreme conditions like humidity, coastal exposureor desert climates.

wdt_ID wdt_created_by wdt_created_at wdt_last_edited_by wdt_last_edited_at Model Order number B max D max E max A C Hole diameter K F max Remarks
2 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK6-40. 63 4013.001/2 78 72 90 56±0.15 46±0.125 4.6 1.5
3 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JJBK6-100 4013.003 85 75 96 64±0.15 62±0.15 4.6 1.5
4 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK6-160 4013.004 96 92 105 84±0.175 73.5±0.15 5.5 1.5
5 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK6-250 4013.005 96 100 104 84±0.175 85±0.175 5.8 1.5
6 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK6-400 4013.006 120 100 122 90±0.175 85±0.175 5.8 2
7 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK6-500 4013.007 120 110 122 90±0.175 96±0.175 5.8 2
8 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK6-630 4013.008 150 110 140 122±0.2 90±0.175 7 2
9 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK6-800 4013.009 150 128 142 122±0.2 105±0.2 7 2
10 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK6-1000 4013.01 150 190 142 126±0.2 152±0.2 7 3 Horizontal
11 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK6-1000 4013.011 168 125 155 138±0.2 105±0.2 9 2 Vertical
Model Order number B max D max E max A C Hole diameter K F max Remarks
JBK7 Control transformers

JBK7 Series: The premium option for critical and high-performance applications, delivering low energy loss, high efficiency, and superiorreliabilityin extreme temperatures.

wdt_ID wdt_created_by wdt_created_at wdt_last_edited_by wdt_last_edited_at Model Order number B max D max E max A C Hole diameter K F max Remarks
2 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-40. 63 4014.001/2 78 72 90 56±0.5 46±0.5 4.6 1.5
3 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-100 4014.003 84 75 96 64±0.5 62±0.5 4.6 1.5
4 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-160 4014.004 96 92 105 84±0.5 73.5±0.5 5.5 1.5
5 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-250 4014.005 96 100 104 84±0.5 85±0.5 5.8 1.5
6 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-300 4014.006 120 112 105 84±0.5 85±0.5 5.8 2
7 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-400 4014.007 150 100 122 90±0.5 85±0.5 5.8 2
8 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-630 4014.008 150 110 140 122±0.5 90±0.5 7 2
9 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-800 4014.009 150 128 142 122±0.5 105±0.5 7 2
10 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-1000 4014.01 150 205 142 126±0.2 152±0.2 7x12 3 Horizontal
11 Kiva 09/07/2025 07:29 AM Kiva 09/07/2025 07:29 AM JBK7-1000 4014.011 168 138 155 138±0.5 105±0.5 9x15 2 Vertical
Model Order number B max D max E max A C Hole diameter K F max Remarks

Applications

  • Residential Power Supply – Step down utility voltage (240 V/120 V) for safe, reliable home appliances and lighting circuits.
  • Lighting & Signage – Provide low-voltage power (e.g., 24 V, 12 V) for LED signage, landscape lighting, and architectural fixtures.
  • HVAC Control Circuits – Feed thermostats, valves, and control relays with stable 24 V or 120 V supplies in heating, ventilation, and air-conditioning systems.
  • Industrial Control Panels – Supply safe low-voltage power to PLCs, timers, and control relays in small-to-mid-size machine enclosures.
  • Telecom & Data Equipment – Isolate and regulate 48 V or 24 V DC station power for routers, switches, and remote terminal units.
  • Solar Power Inverters – Step up or down panel-mounted DC inverters to match grid or battery-bank voltages in small photovoltaic systems.
  • UPS & Battery Chargers – Provide isolated AC input for battery-charger circuits and uninterruptible power supplies in critical backup applications.
  • Medical & Laboratory Instruments – Deliver isolated, low-noise power for sensitive diagnostic, imaging, and analytical equipment.
  • EV Charger Control – Step down line voltage to control electronics (PLC, metering, display) within single-phase electric vehicle charging stations.
  • Audio & Broadcast Systems – Isolate and regulate voltage for studio consoles, amplifiers, and rack-mount broadcast gear to prevent ground loops and noise.

Basic Knowledge

1. Core Lamination & Magnetic Flux Management

  • Grain-oriented silicon steel with ultra-thin (≤0.23 mm) laminations slashes hysteresis losses. Cheaper units use thicker, non-oriented laminations, generating excess heat under light loads and accelerating insulation ageing.

2. Inrush Current Mitigation

  • Split-winding topologies or auxiliary “magnetizing” windings limit energization inrush to ≤5× rated current. Without this, breakers trip and core stress “buzz” develops, especially in larger kVA units.

3. Insulation & Varnish Techniques

  • Vacuum pressure impregnation (VPI) creates a void-free resin encapsulation around coils, preventing moisture ingress and corona discharge in high-humidity or fluctuating-voltage environments.

4. Thermal Hot-Spot Monitoring

  • Embedding fiber-optic temperature probes at the coil’s hottest turn gives real-time hotspot data. Traditional external RTDs lag actual winding temperature by 10–15 °C, risking unseen insulation breakdown.

5. Acoustic & Mechanical Vibration Control

  • Acoustic dampening laminations and spring-isolated feet eliminate core-coil microphonic noise in office or residential installs. Rigid mounting in mobile or pump-room panels leads to fatigue cracks over time.

6. Tap-Changer Accuracy

  • On-load tap changers (OLTC) with ±1% step accuracy maintain precise secondary voltage under varying loads. Off-load units spur downtime for adjustments, unacceptable in continuous processes.

7. Environmental & Chemical Resistance

  • Class H varnish coatings resist chemical fumes in manufacturing plants, while LSZH (Low Smoke Zero Halogen) materials prevent toxic gas release in enclosed or public-space installations.

8. Lifecycle & Predictive Maintenance

  • Annual partial-discharge testing detects microscopic voids in insulation before full failure. Infrared thermography pinpoints loose connections or early hotspot formation, extending service life by years.

Why Choose Leipole?

As a professional buyer, do you face these challenges?

❌ Delivery delays – affecting project progress and production line stability

❌ Poor technical adaptability – standard products cannot meet complex working conditions

❌ High hidden costs – frequent maintenance, excessive energy consumption, slow after-sales response

❌ Compliance risks – lack of international certification leads to customs clearance and warranty disputes

Leipole is proud to offer one-stop solution:

💎 Global layout, zero delivery delays 

  • R&D and sales headquarter led by the team in Singapore – cutting-edge cooling technology iteration to ensure product leadership
  • Manufacturing base in Shanghai, China – ISO 9001 & ISO14001 certified, cost optimization + high quality control standards
  • Localized warehousing in 24 countries – spot shipments from the EU, America, and Southeast Asia, urgent orders arrive within 3 days

🔧 Deep customization capabilities to solve complex needs

  • OEM/ODM full-case support – from cooling structure design to branding customization, 100+ successful cases (Industrial Automation/ New Energy Industry/Data Centers)
  • Working condition simulation test – Free simulation of air volume, high temperature, high humidity and vibration environment to ensure 100% adaptability of the solution

🌍 Worry-free compliance, global access

  • Authoritative certification – CE, UL, RoHS, REACH full coverage, hassel-free customs clearance in Europe, America and Southeast Asia

🚀 Cost optimization throughout the entire life cycle

  • Energy consumption reduced by 30% – patented airflow design, saving 30% in electricity bills per year compared to peer product
  • 1-year warranty – redundant design of key components, failure rate <0.2%
  • 7×24 localized service – 50+ national technical teams, 4-hour response, direct supply of spare parts.

Customization Process

Accurate Demand Analysis

Professional engineers deeply understand your equipment parameters, application environment, and special requirements.

Customized Technical Solutions

R&D teams develop optimal heat dissipation solutions based on your needs, including airflow calculations and installation planning.

 Sample Testing and Validation

Provide samples for real-environment testing, collect data feedback, and ensure solution effectiveness.

Mass Production

After confirming the solution, production follows strict ISO9001 quality management systems to ensure batch stability.

FAQ

🔹When do I need a 240 V to 120 V step-down transformer?

💡Use it when you must power 120 V appliances from a 240 V supply—common in international machinery retrofits and specialty HVAC equipment.

🔹What makes a 1 kVA transformer ideal for home applications?

💡A 1 kVA unit safely handles typical household loads—lighting, small appliances, and electronics—without over-specifying and wasting energy.

🔹Why choose a toroidal transformer for low-noise requirements?

💡Toroidal cores emit < 25 dB(A) hum thanks to uniform winding and low magnetic flux leakage—perfect for studios, labs, and audio equipment.

🔹What are the benefits of dry-type transformers in industrial settings?

💡Dry-type units eliminate oil-related fire risk, require no leak-prone maintenance, and withstand high ambient temperatures with Class H insulation.

🔹How does a transformer for HVAC control differ from general-purpose types?

💡HVAC control transformers provide precise low-voltage outputs (often 24 V) and handle high inrush currents from motor starters and solenoid valves.

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