People Electric · Explosion-Proof Star-Delta Motor Starter
Product overview
People Electric BQX51 is an explosion-proof star-delta motor starter family for project-selected motor starting. The page keeps the original model-specific selection table, outline drawings and electrical schematic. Choose one documented factory model; motor ratings, starting performance, protection and control devices must remain matched to that model and the actual load.
Technical selection summary
| Manufacturer / series | Original People Electric BQX51 |
|---|---|
| Main supply | AC 380V; three-phase circuit shown in the manufacturer schematic. Confirm system frequency and control supply. |
| Starting method | Star-to-delta transition for a suitable six-terminal motor |
| Manufacturer Ex marking | Exd IIB T6 as printed; verify actual supplied unit nameplate and applicable conformity documents |
| Enclosure / corrosion protection | IP54; WF1 |
| Standards referenced | GB 3836.1, GB 3836.2 and IEC 60079 |
| Cable / entry | G1 1/2 to G3 thread entries; source cable diameter 14–25mm; final inlet/outlet count and size depend on the project |
| BQX51-13 | Motor-power entry 13kW; rated current 26A; thermal-relay setting 1.05In as source; time-relay reference entry 11 |
| BQX51-17 | Motor-power entry 17kW; rated current 33A; thermal-relay setting 1.05In as source; time-relay reference entry 13 |
| BQX51-22 | Motor-power entry 22kW; rated current 42.5A; thermal-relay setting 1.05In as source; time-relay reference entry 15 |
| BQX51-30 | Motor-power entry 30kW; rated current 58A; thermal-relay setting 1.05In as source; time-relay reference entry 17 |
| BQX51-37 | Motor-power entry 37kW; rated current 72A; thermal-relay setting 1.05In as source; time-relay reference entry 17 |
| BQX51-45 | Motor-power entry 45kW; rated current 90A; thermal-relay setting 1.05In as source; time-relay reference entry 20 |
| BQX51-55 | Motor-power entry 55kW; rated current 105A; thermal-relay setting 1.05In as source; time-relay reference entry 24 |
| BQX51-75 | Motor-power entry 75kW; rated current 150A; thermal-relay setting 1.05In as source; time-relay reference entry 30 |
| BQX51-95 | Motor-power entry 95kW; rated current 190A; thermal-relay setting 1.05In as source; time-relay reference entry 35 |
| Motor connection / duty | Motor must be suitable for delta running at the supply voltage, with the required accessible terminals and a load suitable for reduced-torque star starting. Confirm the motor design and transition conditions. |
| Timer / intermittent duty | Timer adjustable 0–60s; manufacturer states 30 operations/hour for intermittent work and an interval of at least 90s. Final transition time must match the actual acceleration and load. |
The model choices reproduce the original selection-table codes. Numerical current/power entries whose units are omitted in the English table require a factory-confirmed technical schedule. Do not combine a model with a different row motor rating, protection setting or CT ratio. Confirm actual control/coil supply, upstream fault protection, starting time, duty and applicable hazardous-area documentation.
Typical applications
- Reduced-voltage starting of suitably selected industrial three-phase motors.
- Project motor-control installations matching the supplied hazardous-area marking and approved electrical design.
Specify your enquiry
For a focused quotation, include:
- Factory model, motor nameplate current/power, voltage/frequency, connection and load acceleration requirements.
- Starting current/torque, duration, operations/hour, control supply and protection coordination.
- Actual Ex marking/site requirements, cable-entry count/size, final enclosure drawing, quantity and destination.
Download People Electric BQX51 catalogue (PDF)
Product reference images and drawings
