EX-proof Intirnsic VF Supply
Product Overview:
LCX Power-GBP flame-proof & intrinsically-safe variable-frequency power supply is special frequency-conversion power equipment for explosive hazardous locations.
It complies with GB3836 series explosion-proof standards, adopting heavy-duty flame-proof enclosure plus intrinsically-safe control circuit dual-safety design.
It converts fixed-frequency AC input into adjustable-frequency pure sine-wave AC output, adopting SVPWM space-vector modulation and full-digital DSP vector control technology.
Modular power unit supports parallel capacity expansion. The intrinsically-safe auxiliary circuit supplies power for local monitoring and communication instruments in hazardous zones.
The unit passes explosion-proof, damp-heat and anti-impact tests, featuring high safety, anti-vibration performance and high reliability, suitable for speed-regulation driving and variable-frequency power supply under coal mine, petrochemical and other explosive-gas hazardous environments.
Typical Applications:
· Coal-mine underground belt conveyor, fan, water-pump variable-frequency speed-regulation drive
· Petrochemical & oil-gas field explosive hazardous-area motor frequency-conversion power supply
· Tunnel, mine engineering explosion-proof fan, pumping-station equipment speed-governing control
· Hazardous-zone test platform for explosion-proof motor variable-frequency performance verification
· Flammable-gas workshop variable-frequency drive for metallurgy and chemical industry
· Explosion-proof variable-frequency power source for mining and petro-chemical off-grid energy-storage supporting system
Technical Specifications：
1. Explosion-proof Structure & Control Topology Heavy-duty flame-proof enclosure, intrinsically-safe auxiliary control circuit, explosion-proof mark Ex d[ib] I Mb. Adopt SVPWM space-vector PWM modulation, full-digital DSP vector / V/F control. Modular power unit, multi-module parallel expansion function.
2、Electrical Performance
· Wide-range three-phase AC input, adapt to large-amplitude grid voltage fluctuation of mine sites
· Three-phase pure sine-wave AC output; output frequency 0-120Hz continuously adjustable
· Frequency setting accuracy ≤±0.1%FS; output voltage precision ≤±1%FS; THD ≤3%
· Max conversion efficiency ≥94%
· Strong overload capacity:150% rated current for 60s, 200% rated current for 3s
· Support multi-segment speed, PID closed-loop regulation, AVR automatic voltage stabilization function
3、Intrinsically-safe Auxiliary Circuit Intrinsically-safe control & communication auxiliary loop with double-redundant voltage-limiting and current-limiting protection. Strictly restrict ignition energy of secondary circuit; suitable for power supply of local sensors and monitoring instruments in hazardous zones.
4、Complete Multi-level Protection Functions Input over-voltage / under-voltage, phase-loss protection; output over-voltage, over-current, short-circuit, over-temperature, stall-protection, leakage-locking protection; motor over-load protection. Fault latch-off and complete fault-event record function.
5、HMI & Communication Interface Local explosion-proof color display window with Chinese-English bilingual. Real-time display of input/output voltage, current, frequency, running status and alarm information. Standard RS485, Ethernet interfaces, Modbus protocol, support remote monitoring, parameter setting and data uploading for unattended hazardous sites.
6、Cooling & Environmental-mechanical Adaptability Intelligent temperature-controlled forced air cooling, optional water-cooled version. High-strength flame-proof enclosure, anti-shock, anti-vibration, damp-heat & corrosion-resistant. Operating temperature:-20℃ ~ +55℃, adapt to underground mine, petrochemical sites with dust and corrosive gas.
Technical Parameters and Selection
Technical Parameters and Selection
