MV / LV Switchgear — KYN28-12, GGD, GCK

Medium Voltage Switchgear

KYN28-12 Metal-Clad Switchgear

Sufficiently large air insulation distance, avoiding the possibility of inter-phase accidents.
IP4X enclosure protection level — effectively prevents the human body and external solids from approaching live parts, ensuring personal safety and reliable operation.
Non-magnetic conductive materials used for key high-current components, solving temperature-rise problems caused by high currents.

Max. Temperature+40°C

Min. Temperature−15°C

Altitude≤1000m

Daily average relative humidity ≤95%; monthly average relative humidity ≤90%.

Low Voltage Switchgear

1
Reasonable design — unitized design according to the characteristics of various switching electrical appliances, combined into functional units.
2
Universal structure, flexible assembly — C-shaped profile meets various structural forms.
3
Standard modules — standard unit module structures for protection, operation, conversion and control can be separately and arbitrarily selected and combined.
4
Safety protection — isolation between regions and mutual isolation between incoming/outgoing lines of functional units.

Model	Rated Voltage (V)	Frame	Rated Current (A)	Short-Circuit Breaking (kA)	Short-Time Withstand (kA/1s)	Peak Withstand (kA)
GGD1	380	A	1000	15	15	30
GGD1	380	B	600 (630)	15	15	30
GGD1	380	C	400	15	15	30
GGD2	380	A	1500 (1600)	30	30	63
GGD2	380	B	1000	30	30	63
GGD2	380	C	600	30	30	63
GGD3	380	A	3150	50	50	105
GGD3	380	B	2500	50	50	105
GGD3	380	C	2000	50	50	105
GGD4	380	A	4000	80	80	176
GGD4	380	B	3150	80	80	176
GGD4	380	C	2500	80	80	176

Low Voltage Switchgear

1
Compact design — enables a relatively small space to accommodate more functional units.
2
Flexible assembly — capable of meeting the requirements of various structural forms, protection levels, and operating environments.
3
Standard module design for procurement — users can select and assemble as needed.
4
High safety — extensive use of high-strength flame-retardant engineering plastic components to enhance protection and safety performance.

Item	Unit	Data
Main circuit rated voltage	V	AC 380 (400), 660 (690)
Auxiliary circuit rated voltage	V	AC 220, 380 (400); DC 110, 220
Rated frequency	Hz	50 (60)
Rated insulation voltage	V	660 (1000)
Rated current — horizontal busbar	A	≤4000
Rated current — vertical busbar (MCC)	A	1000
Busbar short-time withstand (1s)	kA	50, 80
Busbar peak withstand (0.1s)	kA	105, 176
Power-frequency test — main circuit (1min)	V	2500
Power-frequency test — auxiliary circuit (1min)	V	1760
Busbar — 3-phase 4-wire	—	A, B, C, PE, N
Busbar — 3-phase 5-wire	—	A, B, C, PE, N
Protection degree	—	IP40

Rated peak withstand current expressed in kA, consistent with GGD3/GGD4 peak ratings above; reproduced as published in the source datasheet.