BUMHAN CO., LTD.

Technical data

BHNCT (NOISE CUT TRANSFORMER)

Cause of Noise

High-frequency rates from time to time reaching dozens MHz

Mainly transterre by way of Power Line of electric, controlling and power-supplying hdvices.

Inceasing number of devices demanding power
▷ Signalization occurring very commonly from varied devices

Beccones very weak to surge and noises
▷ Increasing number of devices noise-affected

Preventive Measures

Noise Filter

Surge Protector

NCT (Noise Cut Transformer)

Head-to head Comparisons among Preventive Measures

Category	Property	Note

Noise Filter Surge Protector	Most common means. Functionally limited as the power line and circuit are not nsulatable.	Used mostly by domestic Companies

NCT	Cuts noises in principle by breaking Ground Loop of noises and surges for insulation. Manifests higher noise-controlling properties	Used mostly by foreign Companies

Principle

Conventional : Entire magnetic fluxes from "Pri." transmitted to "Sec." for the perfect induction.
          NCT : Low-frequency magnetic fluxes selectively transmitted to "Sec.", with harmonic fluxes eliminated in the middle(within magnetic circuit) before reaching "Sec."
                    (by way of Metal Pin / Shielding Method)

Perfect control of electric capacity and induction feasible for the eventual noise cut.

Operational property

Features perfect insulation between PS and SS (very much improved from the conventional shielded transformer)

Adopts Multi-shield System to maximize shielding property.

Sets input and output apart from each other by way of the foregoing perfect insulation

Input / Output wiring adopts 'Shielded Twist Wiring' to maximize shielding property against the spatial noise.

Operational example
	Link NCT at where the device received input to get rid of noises and surges to supply 'Clean Power' ▷ Mechanically protects device, extends life, prevents mal-operation and damage.

Strengths

No further earthing necessary while bringing the mechanical property of the device all along.
▷ Noise cut also feasible at where earthing is not spatially feasible

Impedance matching no longer becomes al matter.

Insulation provided for anti-surge property.

Less power leaked over device operation.
▷ Best-fit for medical devices and any other devices subject to the power leakage limit.

Effective means of cutting bi-directional noises
▷ Bi-directionally cuts noises led-in or generated within the device(Switching noises)

Effective means of cutting noises with wider frequency (up to dozens KHz) thanks to the advanced structural property compared to the conventi conventional means of Noise Filter, etc..

Use

Controller Systems(PLC / ROBOT / DCS / CONTROLLER)

Precise measuring devices

Broadcasting / Audio-visual devices

Medical devices

Any other devices subject to noise influence

Office automation devices (OA / FA)

Semi-conductor manufacture facilities

Devices subject to surge influence

Rail network, subway signaling and communication devices

NCT와 TRANSFORMER 특성비교

일반 TRANSFORMER	실드 TRANSFORMER (ISOLATION)	NOISE CUT TRANSFORMER

Normal Mode. Common Mode Noise 모두통과함.	Normal Mode Noise는 통과 Common Mode의 Noise의 저주파대는 감쇠되나 높은 대역은 모두 통과함.	Normal Mode. Common Mode의 Noise 모두 감쇠함.