Power Distribution Panels
LV Switchgear (MNS / GCS / GCK Drawer-Type & GGD Fixed) | UniRegal
Factory LV switchgear: drawer-type MNS, GCS and GCK motor-control and power centers plus fixed GGD boards, 380-660 V, 50/60 Hz, main bus to 6300 A.
Specifications
- Types
- MNS / GCS / GCK drawer-type; GGD fixed-type
- Rated working voltage
- GCK 380 V; GCS 400/660 V; MNS 380/660 V; GGD 380 V (main circuits)
- Rated frequency
- 50 / 60 Hz
- Main busbar
- To 6300 A (GCK); 1600-4000 A horizontal bus (MNS); to 4000 A horizontal, 1000 A vertical (GCS)
- Short-time withstand
- To 100 kA (GCK); 50/80 kA (MNS); 80 kA (GCS); 15/30/80 kA (GGD tiers)
- Peak withstand
- To 220 kA (GCK); 105/176 kA (MNS)
- Drawer units
- GCS: 1/2 to 3 unit sizes, up to 11 units or 22 half-units per section
- Modular frame
- GCK: 20 mm module holes; MNS: E=25 mm modular system
- Enclosure protection
- IP30-IP40 (IP32 for GCK)
- Cable entry
- Top, bottom or side cable entry (GGD); bottom cable outlets (GCK)
- Standards
- IEC 60439-1 / IEC 439-1, GB 7251.12 design basis
When a plant, water or infrastructure project needs low-voltage power distribution and motor control, the switchgear decision usually comes down to three numbers: main busbar rating, short-circuit withstand, and how fast a failed unit can be serviced. UniRegal supplies factory-assembled LV switchgear in four proven families - drawer-type MNS, GCS and GCK centers plus fixed-type GGD boards - built to your single-line diagram, load schedule and enclosure requirements.
Drawer-Type or Fixed-Type: Which Switchgear Fits Your Plant?
Choose drawer-type construction (MNS, GCS or GCK) when the board feeds motors or process loads that must keep running while another circuit is serviced. Withdrawable units disconnect from the main bus, so a pump, fan or compressor starter can be isolated, pulled and replaced without de-energizing the whole section. GCS drawer units have clearly marked connected / test / disconnected / withdrawn positions with mechanical interlocks, and a single GCS section holds up to 11 unit drawers or 22 half-unit drawers - dense enough for motor control centers.
Choose fixed-type GGD boards for radial distribution where circuit changes are rare and first cost matters more than unit interchangeability: incoming and outgoing power and lighting feeders in one naturally ventilated board, with top, bottom or side cable entry.
Ratings, Construction and Options
GCK centers are built on a 20 mm modular frame and carry main busbar ratings up to 6300 A with short-time withstand up to 100 kA and peak withstand to 220 kA, using aluminium slide rails for the withdrawable units. MNS boards use an E=25 mm modular system with horizontal busbar from 1600 A to 4000 A and 50/80 kA short-time withstand. GCS boards rate horizontal busbar to 4000 A with vertical busbar at 1000 A. GGD fixed boards are produced in 15 kA, 30 kA and 80 kA short-circuit tiers at 380 V. Enclosure protection is IP30-IP40 (IP32 for GCK), and all families are designed to the IEC 60439-1 / IEC 439-1 and GB 7251.12 requirements.
Sections can combine incoming, bus-coupler and feeder compartments, and GCK boards can additionally be assembled as power-factor-compensation, metering and lighting distribution units. Drawer boards can be delivered as power centers (GCK) or motor control centers, with mechanical and electrical interlocks, position indication and optional auxiliary contacts.
What We Need to Quote Your Switchgear
Send us your single-line diagram and load schedule. To return a section layout, busbar rating and lead time, our engineers also need the site nominal voltage and earthing system (TN-S / TN-C-S / TT), short-circuit level if known, and whether future feeders must be added - if they will, specify drawer-type construction now.
Buyer tip: for motor control center duty, list motors by kW, starting method and duty class; for pure distribution, a fixed GGD board usually delivers the lowest installed cost.
Request a proposal with your SLD and load schedule, and we will confirm the board arrangement, ratings and delivery time before you commit.