YB3280-6 applications & standards — Flameproof (Ex d) Motor by Manufacturer

YB3280-6 is a high-performance Flameproof (Ex d) Motor built by the manufacturer, rated approx. 60 kW, voltage 380V / 660V, synchronous speed 1000 r/min, protection Ex d ⅡB T4 Gb, efficiency IE3（GB 18613-2020 2级）. This guide covers model meaning, specifications, applications and ordering.

1. What YB3280-6 means: series ≠ model

Many buyers treat “YB3” as a full model — a common mistake. The series code is only a product family; a complete motor model must include the frame size and pole count. For YB3280-6:

• YB3 — series code, Flameproof (Ex d) Motor;
• 280 — frame size (center height in mm);
• -6 — pole count, 6 poles → synchronous speed 1000 r/min.

Only YB3280-6 is the unique, orderable model; “YB3” alone cannot pin down the spec.

2. Key specifications

3. Technical features

• Flameproof enclosure per Ex d IIB T4 Gb contains internal explosion.
• Precision-machined joints meet GB 3836 flameproof gap requirements.
• For petroleum, chemical and coal-mine hazardous areas.
• Keeps the corresponding IE class while flameproof.
• Explosion-proof terminal box with optional temperature / vibration monitoring.

4. Adjacent frame selection

5. Typical industries

6. Standards

• GB 3836.1 / GB 3836.2
• GB 18613-2020

7. Ordering notes

• State full model, power, voltage, speed/poles, mounting (IMB3/B5/V1) and protection/Ex level.
• Specify environment (temp, altitude, humidity, medium) and starting method (DOL/VFD/soft-start).
• Request special shaft, dual shaft, tachogenerator, encoder or brake at order time.
• Confirm cooling (IC411/IC416/IC611/IC81W) and matching cooler / inverter brand.
• Allow 10–15% power margin; confirm lead time, warranty and site commissioning scope.

8. FAQ

Q: What is the difference between “YB3” and YB3280-6?

A: “YB3” is only the Flameproof (Ex d) Motor family code; YB3280-6 adds frame and poles and is the orderable spec.

Q: What is the rated power of YB3280-6?

A: Estimated approx. 60 kW (380V / 660V); final value per datasheet and order confirmation.

Q: Is frame 280 large? Any mounting notes?

A: 280 mm is a medium-large frame; bolt pattern per IMB3, foundation must be leveled, on-site guidance recommended.

Q: What is the protection / Ex level?

A: Protection Ex d ⅡB T4 Gb; for hazardous areas confirm the Ex mark and gas group.

Q: Why does efficiency IE3（GB 18613-2020 2级） matter?

A: Higher efficiency cuts running cost and heat, ideal for continuous duty with short payback.

Q: How is YB3280-6 cooled?

A: Cooling IC411; keep cooling water/air path clear under full load.

Q: Can it be customized?

A: Yes — voltage, speed, shaft, mounting, sensors and coating; state requirements at order.

Q: Where to get quote and datasheet for YB3280-6?

A: Visit www.xadjw.com or contact Xi’an XIMA sales engineers for selection and quote.

9. About the manufacturer

YB3280-6 is designed and built by Xi'an XIMA Electric (Group) Co., Ltd. (founded 1955), covering HV, LV, flameproof, VFD and DC motors, shipped to 30+ countries. For datasheet, quote or customization of YB3280-6, visit www.xadjw.com or contact a sales engineer.