Multi‑Speed Flameproof Motors from Hindustan Electric Motors are specifically designed for applications requiring variable operating speeds and explosion protection. Certified to IS/IEC 60079‑1 Ex “d” for Gas Groups IIA & IIB, these motors enable efficient performance in hazardous environments while allowing adaptability through multiple speed settings.

Constructed with TEFC (Totally Enclosed Fan Cooled) enclosures and Class F insulation, these motors ensure high safety, low maintenance, and reliable operation even under extreme industrial conditions.

Key Specifications:

• Multi‑Speed Capability: Designed to operate at various preset speeds
• Gas Group Certification: IIA & IIB
• Protection: Flameproof “Ex d”, IP55 TEFC
• Frame Sizes: Typically 71 to 315 (please confirm exact range)
• Power Range: Up to approximately 200 kW
• Poles: Configurable as 2, 4, 6 & 8
• Mounting Options: B3, B5, B14 & combined types
• Voltage: 415 V ±10% or custom
• Frequency: 50 Hz ±5% or customizable
• Ambient Temp: Up to 50 °C
• Altitude Rating: Up to 1000 m
• Insulation: Class F with temperature rise limited to Class B

Applications & Benefits:

Ideal for pumps, fans, compressors, and mixers that require variable speed operation in hazardous settings such as chemical plants, oil & gas facilities, refineries, and offshore installations. These motors offer enhanced process control, energy savings, and explosion-proof safety.