Home/ProductsHazardous AreaYBBP
Hazardous Area

YBBP

YBBP Series Flameproof Variable-Frequency Three-Phase Induction Motor

A flameproof machine certified for the drive, not merely tolerated on it — Ex db I Mb for underground mining, with separate forced cooling so low-speed operation is genuinely usable.

Ex db I Mb3–100 HzIC416
Request a QuoteDownload Datasheet
YBBP flameproof variable-frequency induction motor with a separately driven fan

YBBP is a totally enclosed flameproof variable-frequency three-phase induction motor built to GB/T 3836.1-2021 and GB/T 3836.2-2021, and to JB/T 11201.1-2011, the industry technical specification for flameproof variable-frequency machines in frames 80 to 355.

It runs constant torque from 3 to 50 Hz and constant power from 50 to 100 Hz (some ratings 50 to 60 Hz). Cooling is IC416 — a separately driven fan — which is what allows the bottom of the speed range to be used at torque.

The published marking is Ex db I Mb, the underground mining rating.

The point of a dedicated series is certification. A flameproof certificate covers the machine under the conditions it was tested; running a fixed-speed flameproof motor on a drive is outside that. This series is tested and certified for the drive.

Core specifications

ParameterValue
Frame sizeH80 – H355 mm
Power range0.18 – 315 kW
Explosion protectionEx db I Mb (mining)
Constant-torque range3 – 50 Hz
Constant-power range50 – 100 Hz (50 – 60 Hz on some ratings)
Voltage380 V · 660 V · 1140 V · 380/660 V · 660/1140 V, 50 Hz
Protection degreeIP55
CoolingIC416 (separately driven fan)

Standards and certification

  • GB/T 3836.1-2021
  • GB/T 3836.2-2021 (flameproof enclosure "d")
  • JB/T 11201.1-2011 (flameproof variable-frequency motors, frames 80–355)

Typical applications

  • Underground mining variable-speed drives — ventilation fans, winches, conveyors
  • Any mining application where speed control and flameproof certification are both required

Selection guide

Because the certificate does not cover it. Flameproof certification is issued for the machine as tested; adding a drive changes the thermal and electrical conditions. Using a certified variable-frequency flameproof series keeps the paperwork valid, which is what an inspection will actually look at.
YBBP carries the mining rating Ex db I Mb. YBBPX3 is the high-efficiency version and carries both the mining rating and the industrial rating Ex db IIB. If the site is a surface plant, YBBPX3 is the one with the applicable certificate.
IC416 means the fan runs independently of the motor, so cooling at 3 Hz is the same as at 50 Hz. That is the difference between a specification that works and one that overheats in service.

FAQ

Certification copies for the explosion-protection marking, and the dimension drawings for your frame size, are issued on request. Tell us the area classification, gas or dust group and temperature class for your site.

Downloads

DatasheetPDF · 750 kBDownload
Installation & maintenance manualInstallation, commissioning and servicingRequest
CertificationCertificates and test reportsRequest

Certificates and test reports are issued against the specific model and rating rather than the series, so we send the ones that apply to your order. Tell us the rating and the market and we will send them.

Related products

YBBPX3

Flameproof variable frequency, mining and industrial

YBX3

Flameproof induction motor

YFBBPX3

Dust ignition-proof variable frequency

Technical articles on this series

Explosion-Proof Motor Fasteners: Replacement and Inspection

How to identify, replace and inspect enclosure fasteners without compromising an explosion-protected motor's certified construction.

Read

Explosion-Proof Motor Inspection: Scope, Frequency and Records

Plan visual, close and detailed inspections for explosion-protected motors, with clear escalation and return-to-service evidence.

Read

Ex db IIB T4 Gb Meaning: Reading the Marking

Ex db IIB T4 Gb is five separate decisions written as one string. What each segment answers, and why none substitutes for another.

Read

Repainting Explosion-Proof Motors: Masking and Inspection Rules

Plan surface preparation and repainting without covering Ex markings, flamepaths, earthing contacts, drains or evidence of enclosure damage.

Read

Flameproof / Explosion-Proof Motors on a VFD

Can a flameproof motor run on a VFD? Yes, and a product standard covers it. It adds where constant torque stops and how narrow that window gets.

Read

What an Inverter-Duty Efficiency Figure Actually Measures

Converter-fed efficiency is tested against a standardised reference converter — good for comparing designs, not a prediction for your drive.

Read

VFD Reactors and Filters: Work Out Which Side the Problem Is On

Line reactors, dv/dt filters and insulated bearings are not stronger versions of one device. They fix three different problems in three different places.

Read

From Zone to Motor: What a Zone 1, 2, 21 or 22 Area Actually Requires

The area classification comes first, the nameplate later. Here is the zone-to-protection-level correspondence, from the installation standard.

Read

Request a quote — YBBP

Tell us the rating, quantity and application and an engineer will come back with a specification, the documents for that model, and a price.

Contact Sales