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GCS AC Low Voltage Switchgear - Reliable Power Distribution Solution from China Suppliers and Factory
Model and Definitions
Performance Indexes
The design of the device complies with the following standards:
IEC 439-1: Low-voltage switchgear and controlgear assemblies
GB 7251: Low-voltage switchgear and controlgear assemblies
ZBK 36001: Low-voltage withdrawable switchgear assemblies
Basic Parameters
| Main Current Nominal Voltage（V） | AC 380（4000)，(660) Exchange 380(400)、(660) | |
| Auxiliary Circuit Nominal Voltage(V) | AC 220、380(400) DC (110、220) |
|
| Rated Frequency(Hz) | 50(60) | |
| Rated Insulation Voltage (V) | 660 (1000) | |
| Rated Currency(A) | Horizontal Busbar | ≤4000 |
| Vertical Busbar (MCC) | 1000 | |
| Bus Rated Short-time Withstand Current(kA,1s) | 50,80 | |
| Bus Rated Peak Withstand Current(kA/0.1s) | 105,176 | |
| Power Frequency Test Voltage (V/1min) | Main Circuit | 2500 |
| Auxiliary Circuit | 1760 | |
| Bus | Three-phase Four-wire System | A.B.C.PE.N |
| Three-phase Five-wire System | A.B.C.PE.N | |
| Level of Protection | IP30.IP40 |
Installation Features
Improving the thermal capacity of transfer components significantly reduces the additional temperature rise caused by the temperature increase in connectors, cable heads, and partition plates.
The segregation between functional units and compartments is clear and reliable. This ensures that the failure of one unit does not affect the operation of others, thus confining faults to the smallest possible scope.
The horizontal arrangement of busbars enhances the device's dynamic thermal stability, allowing it to withstand short-circuit current impacts of 80/176 kA.
Furthermore, the Motor Control Center (MCC) cabinets can accommodate up to 22 circuits each, fully considering the needs of large-capacity power generation and automation of electric motor clusters in industries such as petrochemicals.
Connections between the device and external cables are completed within the cable compartment, allowing cables to enter and exit from either the top or bottom. Current transformers are installed within the cable compartment, facilitating easy installation and maintenance.
Within the same Power distribution system, current-limiting reactors can be utilized to match and limit short-circuit currents, stabilizing busbar voltage at a specific value. This can also partially reduce the short-circuit strength requirements for components.
Lastly, drawer units are equipped with a sufficient number of secondary connectors (32 pairs for one unit or more, and 20 pairs for half units), meeting the connection point requirements for computer interfaces and automatic control circuits.
Auxiliary Electric Devices
The design of auxiliary circuit diagrams complies with the "Technical Specifications for Power Supply Design of Thermal Power Plants" and other relevant design technical regulations. It is suitable for low-voltage power supply systems in power plants, substations, as well as low-voltage distribution systems in industrial enterprises and high-rise buildings.
The auxiliary circuit scheme is designed based on the main circuit scheme, divided into functional units for Power incoming lines, feeder lines (PC), and motor feeder lines (MCC) for operational control.
Installation Schematic Diagram
| Cabinet No. | A | B | C | D | remarks |
|---|---|---|---|---|---|
| GCS-TG1010-4 | 1000 | 1000 | 850 | 956 | Contact Cabinet |
| GCS-TG0810-4 | 800 | 800 | 650 | 956 | Power receiving cabinet |
| GCS-TG0808-4 | 800 | 800 | 650 | 756 | Power receiving cabinet |
| GCS-TG0608-4 | 600 | 600 | 450 | 756 | Power receiving cabinet |
Fig. 2 PC Cabinet Installation Schematic Diagram
| Cabinet No. | A | B | C | D | E | FXG |
|---|---|---|---|---|---|---|
| GCS-TG1010-2 | 1000 | 1000 | 850 | 956 | 60 | 400x400 |
| GCS-TG0810-2 | 800 | 1000 | 650 | 956 | 160 | 200x400 |
| GCS-TG0808-2 | 1000 | 800 | 850 | 756 | 60 | 400x400 |
| GCS-TG0608-2 | 800 | 800 | 650 | 756 | 160 | 200x400 |
Fig. 3 MCC Cabinet Installation Schematic Diagram
| Cabinet No. | A | B | C | D | E | FXG |
|---|---|---|---|---|---|---|
| GCS-TG1006-1 | 1000 | 600 | 850 | 556 | 60 | 400x350 |
| GCS-TG0806-1 | 800 | 600 | 650 | 556 | 160 | 200x350 |
Ordering Notices
The order contract includes the following contents:
The complete model of the product, including the main circuit scheme number and auxiliary circuit scheme number.
The main circuit system combination sequence diagram
The electrical schematic diagram of the auxiliary circuit.
A list of components within the cabinet.
Setting parameters for voltage, current, time, and other relevant factors in the circuit.
Any other special requirements that do not conform to the normal use of the product.
Frequently Asked Questions (FAQ)
Which standards does the design of this device comply with?
The device complies with the following standards: IEC 439-1 (Low-voltage switchgear and controlgear assemblies), GB 7251 (Low-voltage switchgear and controlgear assemblies), and ZBK 36001 (Low-voltage withdrawable switchgear assemblies).
What are the main electrical parameter ratings for this equipment?
The main circuit nominal voltage is AC 380V (400V), (660V). The rated insulation voltage is 660V (1000V), with a rated frequency of 50(60) Hz, and the level of protection is IP30 or IP40.
How is the fault containment managed in this switchgear?
The segregation between functional units and compartments is clear and reliable. This ensures that the failure of one unit does not affect the operation of others, thus confining faults to the smallest possible scope.
What is the capacity and circuit limit for the Motor Control Center (MCC) cabinets?
The vertical busbar of the MCC has a rated current of 1000A. Each MCC cabinet can accommodate up to 22 circuits, meeting the requirements of large-capacity power generation and automation of electric motor clusters.
How are external cable connections and transformers configured?
All connections between the device and external cables are completed within the cable compartment, allowing top or bottom entry and exit. Current transformers are also installed within this compartment to facilitate easy installation and maintenance.
What essential information is required when placing an order?
The order contract must include: the complete product model (main/auxiliary circuit schemes), the main circuit system combination sequence diagram, the auxiliary circuit electrical schematic, a list of internal components, setting parameters (voltage, current, time), and any special requirements.