There are many types and models of low voltage switchgear, such as common ones: GCS drawer cabinets, GGD power distribution cabinets, incoming cabinets, outgoing cabinets, etc. Low voltage distribution cabinets also include: soft start control cabinets, variable frequency drive (VFD) control cabinets, star-delta start control cabinets, PLC control cabinets, etc. Common low voltage switchgear models include GCS, GCK, MNS, GGD, PGL, GCL, BFC, MNS, etc. This guide details the structural features, technical parameters, and application scenarios of mainstream models including GCK, GCL, PGL, GGD, and MNS to help you make informed selection decisions.

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1. GCK Cabinet: Drawer-Type High Reliability Switchgear

The GCK cabinet is a drawer-type low voltage switchgear widely used in industrial distribution and motor control centers (MCC).

Parameter	Value
Protection rating	IP30, IP40
Dimensions (W×D×H)	600/800/1000 mm × 800/1000 mm × 2200 mm
Max feeder circuit current	3150A
Max drawer circuit current	3150A

Key advantages:

• Modular drawer structure with good interchangeability
• Safe operation – fault affects only the individual circuit
• Suitable for frequent operation

Therefore, GCK cabinets are ideal for industrial plants and high-rise building distribution centers.

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2. GCL Cabinet: High-Strength Compartmentalized Switchgear

The GCL cabinet uses thin-walled special-shaped profiles assembled into the cabinet body, featuring:

• High strength, light weight – Sturdy yet light structure
• Epoxy powder electrostatic spraying – Uniform coating, good insulation, durable
• Five-zone isolation design – Horizontal busbar area, vertical busbar area, functional unit area, cable room, and neutral grounding busbar area are isolated from each other, effectively preventing fault expansion

Therefore, GCL cabinets are especially suitable for MCC schemes with high safety isolation requirements.

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3. PGL Cabinet: Double-Sided Maintenance Open Switchgear

The PGL cabinet is an indoor, double-sided maintenance low voltage distribution unit. Its basic structure is welded from steel plates and angle steel.

Structural features:

• Door at the front; the upper panel has a small openable door for indicating instruments
• Partitions added between cabinets when assembled side-by-side to reduce accident spread from a single cabinet
• Main busbar installed on an insulated frame above the rear frame of the cabinet
• Equipped with a busbar protective cover to prevent short circuits caused by falling metal objects from above

✅ PGL cabinets suit distribution rooms where maintenance convenience and ample space are priorities.

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4. GGD Cabinet: General-Purpose Distribution Cabinet

The GGD cabinet uses a frame combining partial welding and assembly.

Key technical features:

• Frame made of 8MF cold-formed steel
• Mounting holes arranged at E=20mm and E=100mm moduli, significantly improving assembly versatility
• Busbar clip is ZMJ type – injection molded from high flame-retardant PPO material, modular block structure with high mechanical strength and excellent insulation

Therefore, GGD cabinets are among the most common economical and practical choices for general distribution applications.

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5. MNS Cabinet: Modular High-Strength Switchgear

The MNS cabinet is a typical representative of low voltage draw-out switchgear.

Structural features:

• Frame is a modular structure; the basic skeleton is assembled from C‑shaped steel
• All structural parts are galvanized for strong corrosion resistance
• Firmly connected with self-tapping locking screws or grade 8.8 hexagon bolts, providing excellent overall rigidity

Therefore, MNS cabinets are suitable for applications demanding high electrical performance, mechanical strength, and protection ratings, such as power plants, petrochemical plants, and data centers.

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6. Quick Comparison Table of Models

Model	Structural Features	Application	Protection Rating	Max Current
GCK	Drawer-type, modular	Industrial distribution, MCC	IP30/IP40	3150A
GCL	Profile assembly, five-zone isolation	High isolation requirements	–	–
PGL	Double-sided maintenance, open	Maintenance-friendly distribution rooms	–	–
GGD	Welded + assembled, modulus hole design	General distribution	–	–
MNS	C‑channel assembly, galvanized	Power plants, data centers	High	High

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7. How to Choose the Right Low Voltage Switchgear?

When selecting, consider the following factors:

1. Installation environment – Indoor or outdoor? Corrosive gas or dust present?
2. Protection rating required – IP30 for normal indoor; IP40 for limited dust environments.
3. Maintenance method – Drawer-type (GCK/MNS) allows quick replacement; fixed type (GGD/PGL) has lower cost.
4. Current capacity – Choose feeder circuit max current based on total load.
5. Isolation requirements – For critical loads, cabinets with multiple zones (like GCL) effectively limit fault spread.

Therefore, it is recommended to consult a professional engineer for final model selection based on project needs and budget.

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8. Summary

Low voltage switchgear models offer diverse advantages. GCK cabinets excel in drawer-type high reliability; GCL cabinets feature five-zone isolation; PGL cabinets allow double-sided maintenance; GGD cabinets are economical and general-purpose; MNS cabinets provide modular high strength. Proper selection improves safety, reliability, and maintainability of your power distribution system.