1.Product Overview
The 3.3kV/6.6kV explosion-proof switchgear is engineered for high-voltage power distribution in hazardous areas, ensuring operational safety under extreme conditions. Constructed with reinforced stainless steel or aluminum alloy, the enclosure complies with IEC 60079-1 for flameproof (Ex d) or pressurized (Ex p) protection.
TThe switchgear incorporates vacuum circuit breakers (VCB) or SF6 interrupters (IEC 62271-100) for reliable arc quenching. Advanced protection relays (microprocessor-based) ensure precise fault detection, while mechanical interlocks (IEC 62271-200) prevent unsafe operations.
TDesigned for modularity, the switchgear supports various busbar configurations (single or double bus) and can integrate with smart grid systems via IEC 61850 protocols. Its corrosion-resistant coating and seismic withstand capability (IEC 60068-3) make it suitable for harsh industrial environments.
2.Main Functions
TIsolation & Switching: Safe load breaking under normal and fault conditions.
TOvercurrent & Earth Fault Protection: Integrated relays (IEC 60255).
TArc-Resistant Design: Internal arc classification (IEC 62271-200).
TRemote Monitoring: SCADA-compatible with IEC 61850 communication.
3.Switchgear Model & Dimensions
TModel Dimensions (W×D×H, mm) Configuration
TEP-SG-3.3kV 800×1500×2200 Fixed / Withdrawable
TEP-SG-6.6kV 1000×1800×2300 Withdrawable (Metal-Cla
4.Product Functions (Detailed)
TExplosion Containment: Flameproof (Ex d) or pressurized (Ex p) per IEC 60079.
TArc Flash Mitigation: Internal arc tested to 40kA/1s (IEC 62271-200).
TModular Design: Withdrawable circuit breakers for easy maintenance.
TDigital Protection: Overcurrent (51), earth fault (50N/51N), and differential (87) relays.
TCondition Monitoring: Temperature, humidity, and partial discharge sensors.
TInterlocking System: Mechanical & electrical interlocks per IEC 62271-200.
TCommunication Protocols: IEC 61850, Modbus RTU/TCP, DNP3.0.
5.Product Features (Detailed)
THazardous Area Compliance: Certified for Zone 1/21 (ATEX) and Class I, Div 1 (NEC).
TEnhanced Safety: Arc-resistant construction with pressure relief channels.
TLow Maintenance: Vacuum/SF6 interrupters with long service life.
TSmart Grid Ready: Supports IEC 61850 for digital substation integration.
TRobust Construction: Stainless steel enclosure with anti-corrosion treatment.
TSeismic Performance: Withstands 8.0 Richter scale (IEC 60068-3).
TUser-Friendly HMI: Touchscreen interface with real-time diagnostics.
6.Standards Compliance:
TIEC 62271 (High-voltage switchgear)
TIEC 60079 (Explosion-proof equipment)
TIEC 60255 (Protection relays)
TIEC 61850 (Communication networks)
TIEEE C37.20.7 (Arc resistance testing)
TThis switchgear ensures reliable, safe, and intelligent power distribution in high-risk environments while meeting global electrical safety standards.
Technical Parameters (Detailed)
Rated Voltage (Ur): 3.3kV / 6.6kV
Rated Current (Ir) :Up to 1250A
Short-Circuit Current (Isc): 25kA / 31.5kA (1s)
Breaking Capacity (IEC 62271-100): 31.5kA (VCB/SF6)
Insulation Level: LI 60kV / AC 20kV (IEC 62271-1)
Protection Degree: IP65 (Outdoor), IP54 (Indoor)
Ambient Temperature :-20°C to +40°C
Humidity :≤95% (non-condensing)
Weight: 800–1500 kg (depending on configuration)
