Overview

This product is developed by absorbing advanced foreign technologies and combining domestic actual conditions. The entire product features small size, easy installation and maintenance, low noise, low loss, anti-theft, strong overload capacity, and full protection. It is suitable for new residential communities, green belts, parks, stations, hotels, construction sites, airports, and other places.

The FB prefabricated box-type substation (American-style) is applicable to 10kV ring network power supply, dual-power supply, or terminal power supply systems, serving as a device for power transformation, metering, compensation control, and protection.

This product complies with the following standards: GB/T17467-1998 【High-Voltage and Low-Voltage Prefabricated Substations】; DL/T537-93 【Technical Conditions for Ordering 6-35kV Box-Type Substations.】

Model Meaning

Operating Conditions

Altitude: Not exceeding 1000 meters;
Ambient temperature: -35°C ~ +40°C;
Relative humidity: Daily average not greater than 95%, monthly average not greater than 90%;
Installation site: Locations free from fire, explosion hazards, and chemically corrosive gases, with good ventilation; the ground inclination angle shall not exceed 3°.

Functions and Features

Fully insulated, fully sealed, maintenance-free or low-maintenance, reliably ensuring personal safety;
Compact structure: its volume is only 1/3 to 1/5 of that of European-style transformers with the same capacity, and its height is lower;
A split-box structure can be adopted to avoid oil contamination inside the transformer oil tank;
Double-fuse full-range protection is used on the high-voltage side, greatly reducing costs;
Can be used in both ring networks and terminals; the cable head can be plugged and unplugged emergently under a 200A load current;
The cabinet body is made of stainless steel material, with both heat insulation and heat dissipation functions;
An electronic phase-loss protector is installed on the low-voltage side; when abnormal voltage occurs in the system, it can quickly trip the main incoming switch;
The oil-immersed load switch on the high-voltage side can be upgraded to electric operation, laying a foundation for realizing distribution network automation;
Uses oil-immersed S11 transformers or higher-performance S13 series transformers;

Technical Parameters

Item	Unit	Parameter
Rated Voltage	kV	10/0.4 (High Voltage/Low Voltage)
Maximum Operating Voltage Rated Frequency Rated Capacity 1-Minute Power Frequency Withstand Voltage	kV	12 (High Voltage Side)
	Hz	50
	kVA	50-1600
	kV	42
Lightning impulse voltage	kV	75
Cooling method		Oil-immersed self-cooled
High-Voltage Backup Fuse Breaking Capacity	kA	50
Plug-in Fuse Breaking Capacity	kA	2.5
Ambient Temperature	℃	-35~+40
Allowable Coil Temperature Rise	℃	65
No-Load Voltage Regulation		±5% or ±2x2.5%
Noise Level	dB	50
Protection Rating		IP33

Item	Unit	FKN12-12 Load Switch	FZN25-12 Vacuum Load Switch
Rated Voltage	kV	10
Maximum Operating Voltage	kV	12
Rated Frequency	Hz	50
Rated Current	A	630
Rated Breaking Capacity	A	630
Thermal Stability Current (RMS)	kA/s	20/2	20/4
Dynamic Stability Current	kA	50	50
Short-Circuit Closing Current (Peak)	kA	50	50
Full-Load Breaking Cycles	Cycles	2000	10000
Mechanical Life	Cycles	2000	10000
Power Frequency Withstand Voltage (Phase-to-Phase and Phase-to-Ground)	kV	42	42
Lightning impulse voltage (phase-to-phase and phase-to-ground)	kV	75	75