| Customization: | Available |
|---|---|
| Breaking Capacity: | High Voltage Circuit Breakers |
| Speed: | High-Speed Circuit Breaker |
|
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The FZW28-12F is a 12kV, three-phase 50Hz outdoor pole-mounted distribution switchgear, utilizing vacuum arc-extinguishing technology and SFsix gas for phase-to-ground and phase-to-phase insulation.
The FFK unit is electrically connected to the FDR-01 Fault Detector via control cables, providing:
Fault detection
Control protection
Communication functions
Automatic single-phase ground fault clearance
Automatic isolation of phase-to-phase short circuits
Installation: Designed for 10kV distribution lines at:
• User incoming line demarcation points
• Compliant T-junction locations
Standards Compliance: Meets GB3804-2004 and GB/T726-2008 technical standards.
Operating Environment
Ambient Air Temperature:
Upper limit: +40°C
Lower limit: -40°C
Relative Humidity:
Daily average: ≤95%
Monthly average: ≤90%
Altitude: ≤3,000m
Wind Pressure: ≤700Pa (equivalent to 34m/s wind speed)
Pollution Degree: Class IV (Creepage distance ≥31mm/kV)
Ice Coating Thickness: ≤10mm
Neutral Point Grounding Methods:
Ungrounded neutral
Arc suppression coil grounding
Low-resistance grounding
| Parameter | Unit | Value |
|---|---|---|
| Rated Voltage | kV | 12 |
| Rated Frequency | Hz | 50 |
| Rated Insulation Level | kV | 75/85 (across contacts) |
| Rated Current | A | 630 |
| Rated Short-Time Withstand Current & Duration | kA/2s | 16 |
| Rated Peak Withstand Current | kA | 40 |
| Rated Short-Circuit Making Current | kA | 40 |
| Mechanical Life | operations | 10,000 |
| Net Weight | kg | 210 |
Functional Features
Automatic Phase-to-Phase Short-Circuit Lockout
When a phase-to-phase short circuit occurs on the user branch line, the boundary switch immediately trips and locks out after the substation breaker/recloser operates.
Other branch users on the feeder rapidly restore power after substation reclosing.
Rapid Fault Localization
If the boundary switch trips due to a user branch fault, the responsible user is isolated and proactively reports fault data.
Utility crews locate faults onsite via PDAs or communication modules.
Automatic Single-Phase Ground Fault Clearing
Automatically trips for single-phase ground faults on user branches.
Substation and other feeder users remain unaffected.
Advanced Protection & Control Functions
Instantaneous overcurrent protection
Time-delayed overcurrent protection
3-auto-reclosing cycles
Event recording (time-stamped)
Inrush current restraint
Zero-sequence protection
Real-time clock synchronization
Reclose acceleration
Real-time status monitoring
PDA smart control (Bluetooth/Wi-Fi)
Local & remote setting adjustment
Active fault reporting
GSM SMS alerts
FAQ (Frequently Asked Questions)
Q: Are you a trading company or manufacturer?
A: We are a factory with over 20 years of experience.
Q: Can customers use their own brand name?
A: Yes, we accept OEM service with your brand authorization.
Q: How do you control quality?
A: Our QC team follows TQM (Total Quality Management). Every step meets standards. We can provide photos/videos if needed.
Q: How long to get a quote?
A: For standard products, within 24 hours. For customized products, 48 hours after receiving your details.
Q: Why choose your company?
A: High quality, competitive price, professional team, rich experience, fast delivery, excellent after-sales service, and good reputation.
Q: What are your main products?
A: Various high & low voltage electrical products and related accessories.
Q: Can we get samples?
A: Yes, sample orders are available for quality check and market testing.
Q: What are your payment terms?
A: We accept T/T, L/C, Western Union, and cash.
Q: Do you have ready stock?
A: Standard models are available. Special products/large orders will be newly produced.
Q: Can we visit your factory?
A: Yes, you are welcome to visit us.
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