A. International Mainstream Brand Series
These series are typically introduced by multinational electrical corporations and are well-known and applied globally.
1.MNS®Series
Brand: ABB
Characteristics: One of the world’s most famous modular, withdrawable low-voltage switchgear systems. It features a modular design, compact construction, excellent interchangeability of withdrawable units, and high reliability. It is widely used across various industrial, infrastructure, and commercial building applications.
2.Blokset® / Okken® / Prisma® Series
Brand: Schneider Electric
Characteristics:
Blokset: High functionality and flexibility, commonly used in large-scale buildings and industrial projects.
Okken: Highly modular and customizable, suitable for industrial and infrastructure sectors.
Prisma: A well-established series covering applications from standard to high performance.
3.SIVACON Series
Brand: Siemens
Characteristics: The flagship low-voltage switchboard series from Siemens, available in both fixed-mounted and withdrawable configurations. It is known for its mature technology and stable performance, and is extensively used in critical power distribution applications worldwide.
B. Series Models Prevalent and Widely Used in the Chinese Market
These models have become highly mature within the Chinese market, with numerous manufacturers and extensive application cases.
1.GGD Series
Type: Fixed-mounted Low-Voltage Switchgear
Characteristics: This is one of the most classic and widely used fixed-mounted cabinet types in the Chinese market. It features a simple structure, cost-effectiveness, and easy maintenance. It is suitable for transformer outlets, power and lighting distribution, and is used as incoming, tie, or feeder units.
2.GCK / GCS / MNS Series
Type: Withdrawable Low-Voltage Switchgear
Characteristics: These three represent the most common types of withdrawable switchgear in the Chinese market.
GCK: An earlier technology with a relatively simpler structure and smaller withdrawable units.
GCS: A withdrawable cabinet type independently designed in China, featuring a different operating mechanism for withdrawable units compared to MNS, but remains a mainstream product.
MNS: As mentioned previously, it is an ABB design. However, due to its widespread use, its design concepts and standards have been adopted and manufactured by many Chinese companies, forming a common category of switchgear.
3.MCCB Distribution Boards / Motor Control Centers (MCCs)
Type: Fixed-mounted or Compact Withdrawable
Characteristics: This is not a specific series name but a general product category. It typically refers to compact distribution panels using Molded Case Circuit Breakers (MCCBs) as the primary switching devices, used for powering motor loads or for area distribution. They are characterized by a simple structure and small footprint.
Summary and Comparison
Selection Guidance:
For applications with limited budget, simple circuits, and no frequent changes, the fixed-mounted GGD is a cost-effective choice.
For applications with high requirements for supply continuity, frequent operation and maintenance, and a large number of circuits (e.g., Motor Control Centers (MCCs) in industrial plants, large commercial complexes), withdrawable types like GCK, GCS, or MNS are preferable.
For high-end projects or where specific brands are required, original series from international brands like ABB MNS, Siemens SIVACON, or Schneider Blokset are typically selected.
