Overview

The GGD low-voltage fixed switchgear is suitable for power distribution systems in power plants, substations, industrial and mining enterprises, and other power users, operating at 50 Hz AC, with a rated working voltage of 380 V and a rated working current up to 3150 A. It is used for the conversion, distribution, and control of electrical energy in power, lighting, and distribution equipment.

The GGD low-voltage switchgear is a new type of distribution cabinet designed in accordance with the requirements of the competent authorities under the Ministry of Energy, as well as those of power users and design departments, adhering to the principles of safety, economy, rationality, and reliability. The product features high breaking capacity, excellent dynamic and thermal stability, flexible electrical configurations, convenient modular assembly, strong series compatibility, high practicality, innovative structure, and high protection ratings; it can be used as a replacement and upgrade for low-voltage complete switchgear. The GGD complies with standards such as IEC 439 “Low-Voltage Switchgear and Controlgear Assemblies” and GB 7251 “Low-Voltage Complete Switchgear and Controlgear.”

Model Meaning

G: Low-Voltage Complete Fixed Switchgear

G: Fixed installation and fixed wiring of electrical components

D: Electrical cabinets

Terms of Use

The ambient air temperature shall not exceed +40°C or fall below -5°C, and the average temperature over any 24‑hour period shall not exceed +35°C; it is intended for indoor installation and use, and the altitude of the installation site shall not exceed 2000 m.
The relative humidity of the surrounding air should not exceed 50% at a maximum temperature of +40°C, but higher relative humidity levels are permissible at lower temperatures (for example, 90% at +20°C), taking into account the potential for condensation to occur occasionally due to temperature fluctuations.
The tilt of the equipment during installation should not exceed 5 degrees from the vertical plane.
The equipment should be installed in a location free from severe vibration and impact, as well as in an environment where electrical components are not exposed to corrosive conditions.
When users have special requirements, they may negotiate with the manufacturer to find a solution.

Technical Parameters

Model	Rated Voltage (V)	Rated current range	Rated Current (A)	Rated Short-Circuit Breaking Current (kA)	Rated short-time withstand current	Rated Peak Withstand Current
GGD1	380	A	1000	15	15	30
	380	B	600(630)	15	15	30
	380	C	400	15	15	30
GGD2	380	A	1500(1600)	30	30	63
	380	B	1000	30	30	63
	380	C	600	30	30	63
GGD3	380	A	4000	50	50	105
	380	B	3150	50	50	105
	380	C	2500	50	50	105
	380	D	2000	50	50	105