Low-voltage switchgear types

Common low‑voltage switchgear types include fixed‑type systems such as GGD and XL‑21, and withdrawable (drawer‑type) systems such as GCK, GCS, and MNS, along with device‑based categories like ACBs, MCCBs, MCBs, fuses, contactors, relays, and disconnect switches.

1. Structural Categories

Fixed‑Type Low Voltage Switchgear

GGD – Classic fixed cabinet; simple, cost‑effective; requires shutdown for maintenance.
XL‑21 – Fixed wiring distribution cabinet; used for simple distribution and lighting.

Withdrawable (Drawer‑Type) Low Voltage Switchgear

GCK – Early withdrawable design; suitable for motor control centers (MCC).
GCS – Chinese‑designed withdrawable system; modular and high‑capacity.
MNS – ABB modular withdrawable system; widely used globally; high reliability.

2. Brand‑Specific International Series

ABB MNS® Series – Modular, compact, withdrawable.
Schneider Blokset®, Okken®, Prisma® – Flexible, modular systems for industrial and commercial use.
Siemens SIVACON – Available in fixed and withdrawable versions; used in critical distribution.

3. Device‑Based Low Voltage Switchgear Types

Circuit Breakers

MCB (Miniature Circuit Breaker) – Residential/commercial protection.
MCCB (Molded Case Circuit Breaker) – Industrial circuits, adjustable trip settings.
ACB (Air Circuit Breaker) – High‑current protection in industrial systems.

Other Components

Fuses – Overcurrent protection.
Contactors – Motor and lighting control.
Relays – Control and automation switching.
Disconnect Switches (Isolators) – Manual isolation for maintenance.

4. Application‑Specific Cabinets

MCC (Motor Control Centers) – Often MCCB‑based; fixed or compact withdrawable.
GGJ Reactive Power Compensation Cabinets – For power factor correction.

Low‑voltage switchgear spans cabinet‑level systems and individual protective/control devices, enabling safe and flexible power distribution across industrial, commercial, and residential installations.

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