ZTK(E) Series Explosion-Proof VFD System
- Core Performance : ExdIICT6 explosion-proof, IP66 protection
- Applicable scenarios : Inflammable and explosive gas/dust environment
- Safety redundancy : Temperature rise limitation, explosion-proof structure design
-
Environmental adaptability :
Corrosion-resistant and impact-resistant housing
- INTRODUCTION
- SPECIFICATION
- RELATED
- INQUIRY
ZTK(E) Series Explosion-Proof VFD System
Designed for hazardous environments with explosive risks, compliant with GB3836.1-2010 (equivalent to ATEX/IECEx standards). Certified for use in petroleum, chemical, and coal mining industries (Ex d IIC T4 Gb classification).
Core Features
▸ Explosion-proof enclosure (Stainless Steel 316L) with IP65 protection
▸ Wide operating temperature: -20℃ to +60℃
▸ 3-level harmonic suppression (THD ≤3%) with built-in DC reactor
▸ Fast dynamic response: Torque accuracy ±2% (0.5Hz low-speed operation)
Technical Specifications
| Parameter | Specification |
|---|---|
| Input Voltage | AC 380V-10kV (±15% tolerance) |
| Output Power | 55kW-2500kW (CT&VT modes) |
| Cooling System | Dual redundant fans (IP54) / Optional water cooling |
Safety Protection
► Overcurrent/Overvoltage/Undervoltage protection
► Phase-loss protection & Automatic load balancing
► IGBT overtemperature monitoring (≤85℃ cutoff)
► Intrinsic safety barriers (Ex ia IIC certification)
Typical Applications
Oil & Gas
Oil transfer pumps (Explosion Zone 1)
Gas compressors (Group IIA/IIB)
Chemical Plants
Agitator speed control (T3/T4 temp class)
Corrosion-resistant models available
Certifications
◙ CNEX National Explosion-proof Certification
◙ IEC 60079-11 Intrinsic Safety Standard
◙ SIL3 Functional Safety Certification
Installation Guidelines
• Maintain ≥500mm clearance around enclosure
• Use certified explosion-proof conduits
• Grounding resistance ≤4Ω
| Model | Power Range (kW) | Input Voltage (V) | Frequency Range (Hz) | Ex Certification | Protection Class |
|---|---|---|---|---|---|
| ZTKE-7.5 | 7.5-15 | 380±15% | 0-400 | Ex d IIC T4 Gb | IP66 |
| ZTKE-37 | 30-55 | 660±10% | 0-650 | Ex db IIC T4 Gb | IP66 |
| ZTKE-90 | 75-132 | 1140±10% | 0-1000 | Ex tD A21 IP66 T135°C | IP67 |
Technical Specifications:
Hazardous Area Certification:
ATEX: II 2G Ex db IIC T4 Gb
IECEx: Ex db IIC T4 Gb
NEC 500: Class I Div 1 Groups A-D
Enclosure Material: Stainless steel 316L
Cooling System: Liquid-cooled heat exchanger
Control Method: Sensorless vector control
Ambient Temperature: -20℃ to +50℃
Safety Features:
Double-sealed cable entries
Intrinsic safety barriers (Ex ia)
Temperature monitoring with auto-shutdown
Gas detection interface (4-20mA input)
* Compliant with IEC 60079-0/1/7/31 standards
** Optional remote control stations with Ex certification
† Maintenance interval: 2 years or 20,000 operating hours
