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Truong Nam Hai Co.ltd, APFC panel design, manufacture, supply for project

Power quality is critical to efficient operation of equipment. One contributing element to power quality is power factor at Loads

Auto Power Factor Correction (APFC) aims to improve power factor and hence power quality, utilising capacitors to offset usually inductive loads, for motors. PFC systems increase the efficiency of power supply, delivering immediate cost savings on electricity and stabilization of power supply


The main distribution box for the branches. Usually installed behind LV-SB cabinets and in front of DB cabinets.


Main Low Voltage Switchboards of Truong Nam Hai Co., Ltd are the modular designed which can be tailor-made to meet the client’s exact specification. It can be a Line straight, L shape or the U shape to fit in your limit space switch room.

Assembled from standard parts, this versatile system can be modified during production or even on-site to keep up with any last-minute design changes and inspection before active operation at site.

The systems design with the modular system also allows us to join two or more frame sections together enabling a larger cubicle for housing bulky protection devices.

In-house testing to ensure our reliable & quality products.

General characteristics

Standard: IEC 61439-1 & 61439-2

Type Tested Assemblies: Yes, with 4000A.

Rated Insulation Voltage: 690VAC.

Rated Operational Voltage: 400VAC.

Rated Impulse Withstand Voltage: 6kV.

Degree of Pollution: 3.

Frequency: 50Hz.

Main Busbars: up to 6300A.

Rated Peak Withstand Current: 143kA.

Rated Short-time Current: 65kA / 1s.

Degree of Protection: up to 54.

Segregation Form: up to 4b.

Material: Steel Sheet.

Metal Sheet Thickness: 2mm.

External Surface Protection: Powder Coated.

Painting Thickness: more than 50 micro mm.

Standard Color: RAL 7032, 9002.

Standard Dimension :

High standard : 2150 mm

Width: From 600 to 2000 mm

Depth:  From 600 to 1600 mm


The Motor Control Centers are versatile solutions for the needs of the industry even with high nominal currents.

The MCC – system is used in realization of various types of solutions for the supply and control of electrical motors. With a wide range of selection, form 2b up to 4b, the outgoing units can be removable or fixed. The system also includes instrumentation cabinets, integrated power factor compensation solutions.

Our products are always delivered ready-to-install and special attention has been paid to the productivity of installation.

General characteristics:

Standard: IEC 61439-1 & 61439-2, IEC 60947-3

Rated Insulation Voltage: 690VAC

Rated Operational Voltage: 400VAC

Rated Impulse Withstand Voltage: 6kV

Degree of Pollution: 3

Frequency: 50Hz

Main Busbars:  up to 3200A

Rated Peak Withstand Current: 143kA

Rated Short-time Current: 65kA / 1s

Degree of Protection: up to 54

Segregation Form: up to 4b

Material: Steel Sheet

Metal Sheet Thickness:  2mm

External Surface Protection: Powder coated

Painting Thickness: more than 50 micro mm.

Standard Color: RAL 7032, 9002

Standard Dimension:

High standard : 2150 mm

Width: From 600 to 2000 mm

Depth:  From 600 to 1600 mm



Distribution cabinets for each area need to use electricity. Usually installed to control the lighting system, power supply to the engine


Truong Nam Hai Co., Ltd. Our manufactures, consisting of a Main Distribution Board (MDB), Sub Main Distribution Boards (SMDBs) and Final Distribution Boards , by which the electrical energy is transmitted via branches to reach the exact end user.

A MDB is a panel enclosure that consult the fuses, circuit breakers and ground leakage protection units where the electrical energy, which is used to distribute electrical power to numerous individual circuits or consumer points, is taken in from the transformer or an upstream panel.

The MDB typically has a single or multiple incoming power sources and includes main circuit breakers and residual current or earth leakage protection devices.

The MDB is comprised of a free standing enclosure, a bus bar system, MCCB’s, metering the flow required. Panels are design, manufacture in a systematic manner such as incomer section and outgoing section