GGD (GGD1, GGD2, GGD3)

Low-voltage AC distribution switchboard

Fixed-type low-voltage switchboards for 380 V, 50 Hz AC systems in power plants, substations and industrial facilities, used for power distribution and control of power, lighting and distribution equipment.

Key parameters

Rated voltage: 380 V
Rated current: up to 3150 A
Rated short-circuit breaking current: 15 / 30 / 50 kA
Installation: indoor

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General information

GGD-type low-voltage AC distribution cabinets are designed for 50 Hz AC distribution systems with a rated operating voltage of 380 V and rated operating current up to 3150 A at power plants, substations, industrial and mining enterprises and other electricity consumers. They are used for conversion and distribution of electric power and for control of power, lighting and distribution equipment.

The GGD cabinet is a new-type low-voltage distribution cabinet developed in line with the requirements of a wide range of electricity users and design institutes, following the principles of safety, economy, rationality and reliability. It features high breaking capacity, good dynamic and thermal stability, flexible electrical schemes, convenient combination, strong serialisation and practicality, a new structure and a high degree of protection. It can be used as a new-generation product to replace outdated low-voltage switchgear assemblies.

GGD cabinets comply with IEC 439 "Low-voltage switchgear and controlgear assemblies".

Type designation

GGDx-xx

G	Low-voltage AC distribution cabinet
G	Fixed mounting of electrical apparatus and fixed connections
D	Power distribution cabinet
x	Design serial number: 1 — breaking capacity 15 kA, 2 — 30 kA, 3 — 50 kA
-x	Main circuit scheme code
x	Auxiliary circuit scheme code

Service conditions

Ambient air temperature: not higher than +40 °C and not lower than −5 °C; 24-hour average temperature not higher than +35 °C.
Indoor installation and operation; altitude of the installation site not more than 2000 m.
Relative humidity of ambient air not more than 50 % at the maximum temperature of +40 °C; higher relative humidity is permitted at lower temperatures (e.g. 90 % at +20 °C). Occasional condensation due to temperature changes should be taken into account.
Inclination of the equipment from the vertical when installed: not more than 5°.
The equipment should be installed in places free from strong vibration and shocks, where there are no conditions causing corrosion of electrical apparatus.
Special requirements — on request when ordering.

Main technical data

Model	Rated voltage, V	Rated current, A		Rated short-circuit breaking current, kA	Rated short-time withstand current (1 s), kA	Rated peak withstand current, kA
GGD1	380	A	1000	15	15	30
		B	600 (630)
		C	400
GGD2	380	A	1500 (1600)	30	30	63
		B	1000
		C	600
GGD3	380	A	3150	50	50	105
		B	2500
		C	2000

Main circuit schemes

A total of 129 main circuit schemes with 298 versions have been developed for GGD cabinets (not counting schemes and versions derived from changes in auxiliary circuit functions and control voltage), of which:

Type	Number of main circuit schemes	Number of versions
GGD1	49	123
GGD2	53	107
GGD3	27	68

The main circuit schemes take into account proposals from a wide range of design and operating organisations; schemes required for power plants have been added. Rated current is up to 3150 A; the cabinets are suitable for use with distribution transformers up to and including 2000 kVA. In addition, GGJ1 and GGJ2 capacitor compensation cabinets have been developed for reactive power compensation: 4 main circuit schemes, 12 versions in total.

Low-voltage switchgear assemblies — product range

GGJ — low-voltage intelligent reactive power compensation unit

GCK — low-voltage withdrawable switchgear cabinet

GCS — low-voltage withdrawable switchgear cabinet

MNS — low-voltage withdrawable switchgear cabinet

XL-21 — low-voltage power distribution cabinet

Mobile outdoor distribution box for construction sites

JXF — low-voltage combined distribution box

All products