High-Quality JBK3 series machine tool control transformers Manufacturer, Factory
High-Quality JBK3 series machine tool control transformers Manufacturer, Factory
High-Quality JBK3 series machine tool control transformers Manufacturer, Factory
High-Quality JBK3 series machine tool control transformers Manufacturer, Factory
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High-Quality JBK3 series machine tool control transformers Manufacturer, Factory
High-Quality JBK3 series machine tool control transformers Manufacturer, Factory
High-Quality JBK3 series machine tool control transformers Manufacturer, Factory
High-Quality JBK3 series machine tool control transformers Manufacturer, Factory

High-Quality JBK3 series machine tool control transformers Manufacturer, Factory

All JBK3 series machine tool control transformers use pure oxygen-free copper coils coated with double-layer insulating varnish. They feature ultra-low wire loss, high resistance to oxidation, a long service life, and advanced manufacturing processes. With high magnetic permeability, their loss is far lower than national standards, achieving an internationally leading level in conversion efficiency.These transformers are widely used in 50–60 Hz AC circuits as control power supplies for electrical systems of machine tools and mechanical equipment, as well as power supplies for work lighting and signal lamps.

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Product Description

Type Designation

JBK3-4
1 Machine tool transformer
2 Control
3 Design serial number
4 Rated capacity (VA)
JBK3-5
1 Single-phase
2 Control
3 Design serial number
4 Rated capacity (VA)

Operating Conditions

  • ●Ambient air temperature: -5°C to +40°C, average not exceeding +35°C over 24 hours.
  • ●Installation altitude not exceeding 2000 meters.
  • ●Relative humidity: ≤50% at +40°C; higher humidity allowed at lower temperatures.
  • ●Maximum monthly average humidity: 90% with average minimum temperature of +25°C.
  • ●Free from severe vibration and mechanical shock.
  • ●Protected from rain and snow.
  • ●Supply voltage waveform approximately sinusoidal.

Product Display

JBK3 Series Control Transformers
JBK3 series machine tool control transformers back

Technical Parameters

Parameter Value
Efficiency ≥95%
Insulation Resistance ≥20 MΩ
Overload Capacity 2x rated current for 1 minute
Dielectric Strength 2000V AC for 1 minute (no breakdown/flashover)
Insulation Class Class B (130°C), F (155°C), H (180°C)
Noise ≤55 dB
Ambient Temperature -15°C to +40°C
Max Average Monthly Temp ≤35°C
Installation Altitude <1000m

External Dimensions and Installation Dimensions

JBK3 Series Control Transformers Dimensions
Model Bmax Dmax Emax Mounting Hole Spacing Mounting Hole K or K×J Fmax
A C
JBK3-40/63VA 78 75 89 56±0.4 51±2 4.8×9 12
JBK3-100VA 85 90 91 64±0.4 68±2 4.8×9 12
JBK3-160VA 96 97 105 84±0.4 73±2 5.8×11 14
JBK3-250VA 96 105 105 84±0.4 85±2 5.8×11 14
JBK3-400VA 120 105 123 103±0.4 82±2 7×12 18
JBK3-630VA 150 105 145 128±0.5 86±2 7×12 22
JBK3-1000VA 160 195 145 140±2 158±2 7×12 18
JBK3-1600VA 180 225 155 155±2 180±2 7×12 18
JBK3-2500VA 200 250 171 165±2 210±2 7×12 18

Frequently Asked Questions (FAQ)

What does the designation code on the JBK3 transformer stand for?

The designation indicates the product category (Machine Tool Transformer or Single-phase), function (Control), design serial series (3), followed by the specific rated capacity measured in VA.

What is the operating efficiency and noise level of JBK3 series transformers?

The JBK3 series features an energy-efficient design achieving an efficiency rate of ≥95%, while maintaining an ultra-quiet acoustic noise output of ≤55 dB.

What overload capacity can this transformer handle during standard operation?

The transformer is engineered to safely sustain an overload capacity of up to 2 times its rated current continuously for 1 minute without dielectric breakdown or performance loss.

What insulation standards and temperature classes are supported?

JBK3 transformers support Class B (130°C), Class F (155°C), and Class H (180°C) thermal insulation ratings, offering an insulation resistance of ≥20 MΩ and dielectric test strength up to 2000V AC for 1 minute.

What are the recommended environmental conditions for transformer installation?

The units should be installed in sheltered spaces below 2000m altitude (performance tested <1000m), within -5°C to +40°C ambient temperatures, shielded from snow and rain, and free from intense physical vibration.

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