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BK Series - Single-Phase Control Transformers
The BK series single-phase control transformers are widely used for machine tool control circuits and signal lighting power supply. Available in 25VA to 5000VA ratings.
Model Number Breakdown
BTransformer
KControl
Key Features
- Rated capacity 25VA-5000VA
- Input voltage 220V/380V
- Multiple output voltage taps
- IP00 protection class
Applications
- Machine tools
- Automation equipment
- Control panel power supply
- Signal lighting
TECHNICAL DRAWING
Model: BK-500VA | Type: Oil-immersed transformer | Capacity: 500 kVA
FRONT ELEVATION
ELECTRICAL SCHEMATIC
EFFICIENCY vs LOAD
SIDE VIEW
TOP VIEW
TERMINAL BLOCK
CORE & WINDING
LEGEND:
Iron core
HV winding/bushing
LV winding/bushing
Dimension line
Specifications Range
All specifications and dimensions can be customized upon request
Model Selector
| Key parameters | Model Range |
|---|---|
| Capacity | 50–3000 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) |
Select 2-3 models to compare
| Compare | Model | Series | Capacity (kVA) | Input voltage | Output voltage | Frequency (Hz) | Weight | Dimensions |
|---|---|---|---|---|---|---|---|---|
| BK-50VA | BK | 50VA | ≤1000V | Custom | 50/60 | 130 kg | 77×75×75 mm | |
| BK-100VA | BK | 100VA | ≤1000V | Custom | 50/60 | 130 kg | 86×85×85 mm | |
| BK-160VA | BK | 160VA | ≤1000V | Custom | 50/60 | 130 kg | 96×89×95 mm | |
| BK-200VA | BK | 200VA | ≤1000V | Custom | 50/60 | 130 kg | 96×104×95 mm | |
| BK-250VA | BK | 250VA | ≤1000V | Custom | 50/60 | 130 kg | 96×104×95 mm | |
| BK-300VA | BK | 300VA | ≤1000V | Custom | 50/60 | 130 kg | 120×100×115 mm | |
| BK-400VA | BK | 400VA | ≤1000V | Custom | 50/60 | 130 kg | 120×105×115 mm | |
| BK-500VA | BK | 500VA | ≤1000V | Custom | 50/60 | 130 kg | 120×117×115 mm | |
| BK-630VA | BK | 630VA | ≤1000V | Custom | 50/60 | 130 kg | 150×114×140 mm | |
| BK-1000VA | BK | 1000VA | ≤1000V | Custom | 50/60 | 130 kg | 150×134×140 mm | |
| BK-1500VA | BK | 1500VA | ≤1000V | Custom | 50/60 | 130 kg | 162×135×155 mm | |
| BK-2000VA | BK | 2000VA | ≤1000V | Custom | 50/60 | 130 kg | 192×130×185 mm | |
| BK-2500VA | BK | 2500VA | ≤1000V | Custom | 50/60 | 130 kg | 192×140×185 mm | |
| BK-3000VA | BK | 3000VA | ≤1000V | Custom | 50/60 | 130 kg | 192×150×185 mm |
Instant Selection & Quote Calculator
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EXW (FOB Qingdao)
$2
Range $2 ~ $2 (±8%)
Price Breakdown
| Base price (interpolation) | $2 |
| × Product factor | ×1.0000 |
| × Country factor | ×1.0000 |
| × Copper-linked factor | ×1.0000 |
| + Options / accessories | $0 |
Shipping quoted separately per destination port.
Complete equipment — no winding copper linkage
Reference prices are for estimation only and do not constitute a formal offer.
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