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JBK3 Series - Single-Phase Machine Tool Transformers
The JBK3 series machine tool transformers are designed for CNC machines and automated equipment, providing isolated and stable power for control circuits.
Model Number Breakdown
Key Features
- Designed for CNC machine applications
- Electrostatic shielding for noise reduction
- Multiple secondary voltage outputs
- High dielectric strength
Applications
- CNC machines
- Servo drive power supply
- PLC control systems
- Robotic automation
TECHNICAL DRAWING
Model: JBK3-300VA | Type: Oil-immersed transformer | Capacity: 300 kVA
FRONT ELEVATION
ELECTRICAL SCHEMATIC
EFFICIENCY vs LOAD
SIDE VIEW
TOP VIEW
TERMINAL BLOCK
CORE & WINDING
LEGEND:
Specifications Range
All specifications and dimensions can be customized upon request
Model Selector
| Key parameters | Model Range |
|---|---|
| Capacity | 50–1000 VA |
| Input voltage | ≤1000V |
| Output voltage | Custom |
| Frequency (Hz) | 50/60 |
| Efficiency | ≥85%, ≥90%, ≥93% |
| Allowed temperature rise | ≤65 K |
| Short-circuit impedance | ≤8% |
| Insulation class | Class B (130°C) |
| Compare | Model | Series | Capacity (kVA) | Input voltage | Output voltage | Frequency (Hz) | Weight | Dimensions |
|---|---|---|---|---|---|---|---|---|
| JBK3-50VA | JBK3 | 50VA | ≤1000V | Custom | 50/60 | 130 kg | 78×85×83 mm | |
| JBK3-100VA | JBK3 | 100VA | ≤1000V | Custom | 50/60 | 130 kg | 86×90×95 mm | |
| JBK3-160VA | JBK3 | 160VA | ≤1000V | Custom | 50/60 | 130 kg | 96×95×105 mm | |
| JBK3-200VA | JBK3 | 200VA | ≤1000V | Custom | 50/60 | 130 kg | 96×100×105 mm | |
| JBK3-250VA | JBK3 | 250VA | ≤1000V | Custom | 50/60 | 130 kg | 96×115×105 mm | |
| JBK3-300VA | JBK3 | 300VA | ≤1000V | Custom | 50/60 | 130 kg | 120×115×120 mm | |
| JBK3-400VA | JBK3 | 400VA | ≤1000V | Custom | 50/60 | 130 kg | 120×120×120 mm | |
| JBK3-500VA | JBK3 | 500VA | ≤1000V | Custom | 50/60 | 130 kg | 120×125×120 mm | |
| JBK3-630VA | JBK3 | 630VA | ≤1000V | Custom | 50/60 | 130 kg | 150×120×145 mm | |
| JBK3-1000VA | JBK3 | 1000VA | ≤1000V | Custom | 50/60 | 130 kg | 150×145×145 mm |
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Certification
The values below are computed from what you selected above. Anything that cannot be computed yet is shown as an em dash — never as zero.
Iₙ = S / (√3·U) · I_sc = 100·Iₙ / uₖ · S_sc = √3·U·I_sc · I_p = k·Iₖ
Still required to complete the calculation: rated capacity S, impedance voltage uₖ, short-time or peak withstand current.
Per-model values (P0 / Pk / uₖ declared by the factory, losses, noise, temperature rise, dimensions, weight) are not in the product library: those rows stay at an em dash until the factory parameter sheet is supplied. An em dash means the value is unavailable — it is never rendered as zero.
Read-only: no price factor, not part of the sum — the loss-grade cost is already carried by the efficiency (subtype) base price, so charging here would double-bill. Values come from the product library type-test data, interpolated between published capacities; grades the library does not cover show an em dash, never zero.
Reference prices are for estimation only and do not constitute a formal offer.
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