Control Transformer

JBK Series Singe-Phase Machine Tool Control Transformer

JBK series single-phase control transformer is widely used in AC 50/60Hz low-voltage systems, serving as control power, signal power and local lighting for machine tools, automated production lines, industrial control cabinets and electromechanical equipment. This product adopts high-permeability cold-rolled silicon steel core and 100% pure copper enameled wire winding. It features low no-load loss, low operating noise, stable output voltage and compact structure. Multiple universal voltage taps are configured to match solenoid valves, indicator lights and various small control components. Compliance Standards: JB/T 555 (China Industrial Standard), fully approved with CE certificate, compliant with EU, Vietnam and Southeast Asian 220V/380V 50Hz power grid.

Model Explanation

JBK Seiris

- JBK3/JBK4: Traditional old structure, gradually phased out;
- JBK5: Mainstream universal type (our standard model, compact size, widely used worldwide);
- JBK6: New optimized type with enhanced vibration resistance, for high-end machine tools.
Note: All capacity specifications are universal among JBK3/4/5/6; we mainly supply JBK5 series for overseas market.

Core Features & Advantages

100% pure copper winding + high-quality silicon steel core, low heat generation and long service life.
Multi-tap output (6V/12V/24V/36V/220V), one transformer for multiple control purposes.
Small voltage deviation, strong anti-interference, guarantee stable power for precision control circuits.
Integrated shell structure, good shock resistance, suitable for harsh industrial workshop environment.
Excellent dielectric strength and insulation performance, safe for long-term indoor operation.
Withstand ±5% power voltage fluctuation, strong grid adaptability.

Normal Working Conditions

Altitude: ≤ 2000 m above sea level.
Ambient temperature: -5℃ ~ +40℃; average temperature within 24h ≤ 35℃.
Relative humidity: ≤ 90% (at +40℃), no internal condensation.
Working environment: No corrosive gas, explosive medium, severe vibration or impact.
Power waveform: Approximate sine wave; voltage deviation ≤ ±5%.
Installation: Indoor fixed installation, well-ventilated area is recommended.

Technical Parameters

Model Model No.	Rated Capacity (VA)	Rated Frequency	Primary Voltage (V)	Secondary Multi-output Voltage (V)	Winding Material
JBK-25	25	50/60Hz	220 / 380	6, 12, 24, 36, 220	Pure Copper
JBK-40	40	50/60Hz	220 / 380	6, 12, 24, 36, 220	Pure Copper
JBK-63	63	50/60Hz	220 / 380	6, 12, 24, 36, 220	Pure Copper
JBK-100	100	50/60Hz	220 / 380	6, 12, 24, 36, 220	Pure Copper
JBK-160	160	50/60Hz	220 / 380	6, 12, 24, 36, 220	Pure Copper
JBK-250	250	50/60Hz	220 / 380	6, 12, 24, 36, 220	Pure Copper

Overall Dimension & Installation Size

Model	Overall Size L×W×H (mm)	Mounting Hole Distance A×C (mm)	Hole Diameter (mm)	Single Gross Weight (kg)
JBK-25	76 × 70 × 82	56 × 46	4.8	0.80
JBK-40	84 × 78 × 92	56 × 46	4.8	1.00
JBK-63	84 × 78 × 92	56 × 46	4.8	1.20
JBK-100	86 × 92 × 95	72 × 62	4.8	1.50
JBK-160	98 × 97 × 105	84 × 73.5	5.8	1.80
JBK-250	98 × 110 × 105	84 × 85	5.8	2.20

Packing SpecificationSize

Model	Single Outer Carton L×W×H (mm)	Qty per Carton
JBK-25 ~ JBK-250	100 × 80 × 100	1 Pcs/Box

Electrical Performance Indicators
1. No-load Current: ≤ 8% of rated current, ultra-low no-load loss.
2. Voltage Regulation: ≤ 5% at full load, stable output.
3. Dielectric Withstand Voltage: Primary to secondary ≥ AC 2500V / 1min, no breakdown.
4. Insulation Resistance: ≥ 100 MΩ (room temperature).
5. Temperature Rise: ≤ 45K under rated continuous operation.
Application Scope
- Control circuits & indicator lights of machine tools and automated equipment;
- Solenoid valve and small electrical power supply;
- Local lighting for industrial workshops and production lines;
- Auxiliary power for low-voltage distribution cabinets and panel boards;
- Widely exported to Vietnam, Europe, Africa and other regions.
Custom & After-sales Remark
1. Custom voltage combinations (110V, 127V) are available for special power grids.
2. All products pass 100% full-load aging test before delivery.
3. Standard protection grade: IP20, for indoor use.
4. OEM & ODM: Custom logo, nameplate and package are supported.
5. Certificate: CE certified, comply with EU and Vietnam import standards.

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