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China HXGN17-12 Box-Type Fixed AC Metal-Enclosed Switchgear Suppliers - High-Quality Factory Equipment for 12kV Networks
Standards
GB 3906-2006 "AC Metal-Enclosed Switchgear and Controlgear for Rated Voltages from 3.6 kV to 40.5 kV"
IEC 60298-1990 "Metal-Enclosed Switchgear and Controlgear for Rated Voltages Above 1 kV and Up to 52 kV"
GB/T 11022-2011 "Common Technical Requirements for High-Voltage Switchgear and Controlgear Standards"
Model and Definitions
Conditions of Use
Ambient Temperature: Upper limit +40℃, Lower limit -25℃;
Altitude: Not exceeding 1000m;
Relative Humidity: Daily average not exceeding 95%, Monthly average not exceeding 90%;
Locations free from fire, explosion hazards, and severe vibrations;
Surrounding air must not contain corrosive or flammable gases, water vapor, or conductive dust, avoiding significant contamination.
Major Technical Specifications
| No. | Items | Units | FN12-12 | FZN25-12 | |
| 1 | Nominal Voltage | kV | 12 | ||
| 2 | 1min Power Frequency Withstand Voltage | kV | Ground and phase-to-phase 42; Isolation Break Point 48 | ||
| 3 | Lightning Impulse Voltage (Peak) | Ground and phase-to-phase 75; Isolation Break Point 85 | |||
| 4 | Rated Frequency | Hz | 50 | ||
| 5 | Load Switch | Rated Currency | A | 630 | |
| 6 | Rated Current Switching Life | Time | Not less than 100 | ||
| 7 | Breaking Capacity of No-load Transformer | kVA | 1250 | ||
| 8 | Rated Thermal Stability Current | kA/s | 20/4; Ground switch 20/2 | ||
| 9 | Rated Dynamic Stability Current (Peak) | kA | 50 | ||
| 10 | Rated Circuit Making Current (Peak) | 50 | |||
| 11 | Fuse Rated Currency | A | 125 | ||
| 12 | Composite Apparatus | Rated Transfer Current | A | 870 | |
| 13 | Rated Short-circuit Breaking Current | kA | 20 | ||
| 14 | Compatible Fuse Model | S □ LAJ-12 | |||
| 15 | Machinery Service Life | Time | 2000 | 10000 | |
| 16 | Auxiliary Circuit 1min Power Frequency Withstand Voltage | kV | 2 | ||
| 17 | Electric Operating Mechanism Working Voltage | V | AC/DC 220; 110 | ||
| 18 | Level of Protection | IP2X | |||
Structural Features
The fully assembled structure is lightweight and aesthetically pleasing, allowing for arbitrary combinations and installations, facilitating infinite expansion.
It can be equipped with the FN12-12 type pneumatic Load Switch, Composite Apparatus, or the FZN25-12 type vacuum Load Switch, Composite Apparatus. It is compact, maintenance-free, features a three-phase linkage structure, and has a distinct Isolation Break Point.
The installation method for the Load Switch and Composite Apparatus is flexible, allowing for left-side, right-side, upright, and inverted installations (FZN25 cannot be inverted).
It supports both manual and electric operation and can have remote control capabilities.
Equipped with a complete and reliable mechanical linkage and interlocking device, it fully meets the "five prevention" functions. When the Load Switch is closed, the grounding switch cannot close, and the front door cannot be opened; when the Load Switch is opened, the grounding switch can close, and the front door can be opened when the grounding switch is closed; when the grounding switch is closed, the Load Switch cannot close, but the front door can be opened; when the grounding switch is opened, the Load Switch can open and close, and the front door cannot be opened; when the cable enters from below, if there is power at the entry, regardless of whether the Load Switch is in the closed or open position, the electromagnetic lock controls the front door, preventing it from being opened (except for emergency unlocking with a special key).
The Load Switch uses interlocking protective insulated valves or transparent insulated covers to shield live contacts, ensuring personal safety.
It employs front operation and maintenance, reliably wall-mounted.
The front door is equipped with a viewing window to clearly observe the working conditions of the components inside the cabinet.
External Dimensions
Ordering Notes
When placing an order, the following technical information must be provided:
Main wiring scheme number, purpose, and single-line system diagram, Nominal Voltage, Rated Current, Rated Short-circuit Breaking Current / layout of the distribution room and arrangement configuration diagram of the switch cabinet, etc.;
Requirements for the control, measurement, and protection functions of the switch cabinet, as well as the requirements and schematic diagrams for other locking and automatic devices;
Model, specifications, and quantity of the main electrical components in the switch cabinet;
If the switch cabinet is used in special environmental conditions, this should be detailed during the order placement.
Frequently Asked Questions (FAQ)
What standards do these switchgear units comply with?
The switchgear complies with GB 3906-2006 (for AC metal-enclosed switchgear from 3.6 kV to 40.5 kV), IEC 60298-1990 (for voltages up to 52 kV), and GB/T 11022-2011 standards.
What are the environmental limits for operating the switchgear?
It should be operated in temperatures between -25℃ and +40℃, at an altitude not exceeding 1000m, and with daily relative humidity below 95% (monthly below 90%). The area must be free of explosive hazards, severe vibrations, or corrosive/conductive gases.
Which types of load switches can be installed?
The system can be equipped with either the FN12-12 pneumatic Load Switch/Composite Apparatus or the FZN25-12 vacuum Load Switch/Composite Apparatus.
How does the "five prevention" mechanical interlocking system work?
The interlocking system prevents the grounding switch from closing and the front door from opening when the load switch is closed. It also prevents the load switch from closing when the grounding switch is active. Additionally, an electromagnetic lock prevents opening the front door if the incoming lower cable is energized.
What information is required when placing an order?
Customers must provide the main wiring scheme, system diagrams, nominal voltage/current parameters, distribution room layout, control/protection requirements, specific electrical component models, and details of any special environmental conditions.