EN
Low Voltage Petrochemical Distribution Cabinet
Description
GCS switchgear, i.e. enclosed high-voltage switchgear, is an important device for controlling, protecting and isolating electrical equipment in power systems.
Basic Overvie
Definition and Function: GCS switchgear is a Power distribution equipment used in power systems, mainly used to control, protect and isolate electrical equipment. It can ensure the safe and stable operation of the power system and prevent the expansion of faults.
Composition structure: GCS switchgear is usually composed of cabinet, circuit breaker, disconnector, grounding switch, current transformer, voltage transformer and other
components. These components are installed in the cabinet in a certain order and connected by wires to form a complete electrical circuit.
Working principle: Under normal working conditions, the circuit breaker is in the closed state, and the current flows to the load through the circuit breaker; when a fault is detected, the circuit breaker quickly trips to cut off the circuit; the disconnector and grounding switch are used to isolate and ground the equipment from the power supply during inspection or maintenance.
Parameter Table
I. Electrical Parameters
| Parameter Name | Parameter Value |
| Rated Insulation Voltage (Ui) | 660V, 1000V |
| Rated Working Voltage (Ue) | Auxiliary - circuit: AC 220V, 380V; DC 110V, 220V |
| Rated Frequency (f) | 50Hz or 60Hz |
| Rated Current (In) | Horizontal bus - bar: ≤ 6300A；Vertical bus - bar: 1000A, 1600A, 2500A |
| Rated Short - Circuit Withstand Current (Icw, 1s) | 50kA, 65kA, 80kA, 100kA |
| Rated Peak Withstand Current (Ipk) | 105kA, 143kA, 176kA, 220kA |
| Rated Short - Circuit Breaking Current (Icu) | 50kA, 65kA, 80kA, 100kA |
II. Mechanical Parameters
| Parameter Name | Parameter Value |
| Protection Level | IP30, IP40, IP42, IP54, etc. (can be customized according to requirements) |
| Shell Material | Cold - rolled steel plate or stainless steel plate, and the thickness of the plate is generally not less than 1.2mm |
| Overall Dimensions (Width×Depth×Height, mm) | Standard cabinet: 800×800×2200, 1000×800×2200, 1200×800×2200, etc. (can be customized) |
| Number of Circuits in Drawer Unit | 1/4 - unit drawer: up to 22 circuits in a single cabinet 1/2 - unit drawer: up to 11 circuits in a single cabinet 1 - unit drawer: up to 6 circuits in a single cabinet 2 - unit drawer: up to 3 circuits in a single cabinet 3 - unit drawer: up to 2 circuits in a single cabinet |
| Drawer Interlock | It has mechanical and electrical interlocks to prevent misoperation |
| Drawer Unit | The height modulus is 20mm, and the height of the drawer compartment can be divided into 1E, 2E, 3E, 4E, 5E, 6E, 8E, 10E, 12E, 16E, 20E, 24E, etc. (1E = 20mm, for example, the height of an 8E drawer is 160mm) |
Main Features
Highly integrated: GCS switchgear integrates a variety of electrical components in a compact cabinet, which is easy to install and maintain.
Safe and reliable: It adopts advanced manufacturing technology and materials, has good insulation performance and protection level, and can ensure stable operation in harsh environments.
Intelligent management: Some GCS switch cabinets are equipped with intelligent monitoring systems, which can monitor electrical parameters, fault diagnosis and early warning in real time.
Key structural characteristics:
• Modular Design: 8 standardized module widths (160/200/240/320/400/480/560/640mm)
• Separation Levels: Form 3b separation between functional units and busbars
• Thermal Management: Natural convection cooling channels and heat-resistant components
• Withdrawal Mechanism: Three-position (Connected/Test/Disconnected) racking system with mechanical indicators
• Accessory Mounting: Dedicated spaces for CTs, relays, and monitoring devices
• This structure ensures safe operation up to 690V AC with short-time withstand current (Icw) of 50kA/1s. The vertical busbar system allows flexible power distribution configurations.
