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GGD / MNS — low-voltage switchgear assemblies up to 690 V, 6300–7600 A

LOW-VOLTAGE EQUIPMENT

GGD / MNS — low-voltage switchgear assemblies up to 690 V, 6300–7600 A

Country: China · Model: GGD / MNS

GGD and MNS low-voltage switchgear assemblies receive and distribute electricity in networks up to 690 V with a rated current of up to 6300 A (GGD) and up to 7600 A (MNS). They are installed at substations, power plants, industrial sites and in buildings, from the main distribution boards of transformer substations to auxiliary-supply boards and motor control centres.

GGD
fixed low-voltage assembly, Ue 400/690 V, Ui 690/1000 V, up to 6300 A, Icw up to 100 kA
MNS
modular withdrawable low-voltage assembly, Ue up to 690 V, Ui 1000 V, up to 7500–7600 A, vertical busbars up to 2500 A
Impulse withstand voltage
12 kV
Frequency
50/60 Hz
Request a quoteAll specifications

Technical specifications

GGDfixed low-voltage assembly, Ue 400/690 V, Ui 690/1000 V, up to 6300 A, Icw up to 100 kA
MNSmodular withdrawable low-voltage assembly, Ue up to 690 V, Ui 1000 V, up to 7500–7600 A, vertical busbars up to 2500 A
Impulse withstand voltage12 kV
Frequency50/60 Hz
FrameC-profile 2.0 mm + G-beam 2.5 mm (or 8MF)
StandardsIEC 61439, GB/T 7251

Replacement for

These are analogues of domestic low-voltage switchgear assemblies of the ShchO-70, ShchO-2000, ShNV and ShchSN series and modular withdrawable cabinets.

selected by purpose and main parameters, please confirm with the manager

Specifications are taken from the manufacturer’s technical documentation. Updated .

Description

GGD is built as a fixed AC low-voltage assembly. The rated operating voltage is 400/690 V, the insulation voltage is 690/1000 V, the short-time withstand current reaches 100 kA, and the impulse withstand voltage is 12 kV. The frame is welded and assembled from cold-formed C-profile 2.0 mm thick and G-beams 2.5 mm (or 8MF profile), so the section carries the load of the apparatus without extra reinforcement. The design includes channels for heat removal. MNS is built as a modular system in which fixed, fixed with partitions and withdrawable functional units are combined by power and purpose. Withdrawable units of different heights hold many outgoing feeders and motor starters; the vertical busbars are rated up to 2500 A, and the insulation voltage is 1000 V. The enclosure is made with different degrees of protection, and a removable bottom plate and seals are provided. The 'intelligent' version integrates with metering and dispatching systems. Both types are rated for 50/60 Hz and comply with IEC 61439 and GB/T 7251.

How to choose

The choice starts with the main incoming current. Up to 6300 A, GGD is enough, and above that, up to 7600 A, you need MNS. Another criterion is the need for withdrawable modules. If there are many feeders and motor starters, and a unit has to be replaced while the section is in operation, choose MNS. The board composition is set by the customer's project, so the diagrams and the list of apparatus are agreed before the order.

Request a price and lead time

GGD / MNS — low-voltage switchgear assemblies up to 690 V, 6300–7600 A. We reply within one business day.

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Or email office@usk.ua or call +38 (044) 339-50-20.

FAQ

What maximum current are GGD and MNS rated for?

GGD has a rated current of up to 6300 A. MNS is rated up to 7600 A, and its vertical busbars withstand up to 2500 A.

What is the rated voltage of GGD and MNS boards?

The operating voltage of GGD is 400/690 V and the insulation voltage is 690/1000 V. MNS works in networks up to 690 V with an insulation voltage of 1000 V.

What short-circuit current does GGD withstand?

The short-time withstand current of GGD reaches 100 kA, and the impulse withstand voltage is 12 kV.

How does MNS differ from GGD in design?

GGD is fixed, while MNS is modular, and it combines fixed, fixed with partitions and withdrawable modules. Withdrawable units of different heights hold more outgoing feeders and motor starters.

Which standards do GGD and MNS comply with?

Both types comply with IEC 61439 and GB/T 7251. The mains frequency is 50/60 Hz.

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