Powtran PI150 1R5G3 Mini Variable Frequency Drive

Complete Technical Documentation for PI150 1R5G3

1. Model Code Breakdown

PI150 1R5G3

PI150: Product Series, Powtran Economical Mini Sensorless Vector VFD

1R5: Rated Power 1.5kW (R stands for decimal point, 1R5 = 1.5)

G: General Duty (Constant Torque Type)

3: 3-phase AC380V Input

Suffix Supplement:

PI150 1R5G3Z = Built-in braking chopper; Without suffix Z = Standard version, no built-in braking chopper

2. Core Electrical Specifications

3. Mechanical Dimensions & Installation

Overall Dimension (H × W × D): 138 × 72 × 123.5 mm

Mounting Method: 35mm DIN rail mounting / Screw wall mounting

Weight: Approx. 1.1 kg

4. Working Principle Overview

Adopts AC-DC-AC voltage-source inverter topology.

3-phase AC power is rectified into DC bus voltage; IGBT inverter outputs adjustable voltage & adjustable frequency 3-phase AC power.

Equipped with DSP chip to realize sensorless vector algorithm, offering superior low-frequency torque compared with conventional V/F inverters.

5. Typical Application Scenarios

Conveyors, small fans, water pumps, agitators, woodworking machinery, packaging machinery, light-duty small machine tool spindles.

6. Wiring Guidelines
7. Main Circuit Terminals: R, S, T (3-phase Input); U, V, W (Connect to 3-phase motor);
8. Version without suffix Z: For rapid stop function, external braking resistor + external braking chopper are required;
9. Analog input AI supports 0~10V voltage / 4~20mA current, selectable via onboard jumper;
10. RS485 terminals A/B, support PLC networking communication.
11. Selection Pitfall Guide
12. ❌ Do not confuse voltage grades

G1: Single-phase 220V; G3: 3-phase 380V; Direct replacement is prohibited

2. ❌ For frequent start-stop & high inertia loads: Prioritize 1R5G3Z (with built-in braking chopper)
3. ❌ G-type constant torque drive can theoretically be used for fan & pump variable torque loads; Powtran P-series is recommended for high-power fan/pump applications
4. If ambient temperature＞40℃ or installed inside sealed cabinet, derating operation and enhanced ventilation are required
5. Compatible Alternatives
6. Same-brand Upgrade: Powtran PI160 1R5G3 (enhanced functions)
7. Cross-brand equivalent alternatives

Delta VFD015E43A / VFD015EL43A

Inovance MD200T1.5B

Schneider ATV312HU15N4

9. Common Fault Codes (Abbreviated)

Optional deliverables upon request:

1) Full English product datasheet;

2) Text diagram of standard terminal wiring;

3) Motor auto-tuning procedure;

4) Parameter comparison table vs Delta VFD015E43A

Application Fields of Powtran PI150 1R5G3 (1.5kW 380V Mini Vector VFD)

Product Positioning

PI150 is an economical compact sensorless vector VFD. Compact size, DIN rail mounting support, integrated V/F control + SVC sensorless vector control with excellent low-frequency torque. Ideal for small & medium power, standard working conditions, installation space limited drive applications.

Rated Specification: 1.5kW, 3-phase 380V, constant torque G model, standard version without built-in braking chopper.

1. General Automation Equipment Industry (Mainstream Applications)
2. Packaging Machinery

Light-duty conveyors, material arranging machines, simple film winding mechanisms, carton transport, small case sealers, label conveying units.

Features for application: Stable low-speed startup, analog speed regulation available, medium start-stop frequency.

⚠️ For high-speed winding & high-inertia frequent braking scenarios, select 1R5G3Z with built-in braking chopper.

2. Woodworking Machinery

Light feed conveyors, simple sanding transport, small edge trimming feeding mechanism, light roller conveyor drive.

3. Logistics Conveying Equipment

Light belt conveyors, roller conveyor lines, sorting branch transport mechanisms, light-duty small elevators.

2. Fluid Equipment (Fans & Pumps)
3. Small workshop induced draft fans, exhaust fans, cabinet cooling fans;
4. Small circulating water pumps, cooling water pumps, simple constant pressure water supply branches;

✅ Advantage: Built-in PID function, directly connects pressure/liquid level sensors to realize closed-loop speed regulation;

⚠️ Note: Larger submersible pumps & multi-stage pumps are recommended to select one power grade higher.

3. Light Industry & Food Machinery

Small agitators, light screw conveyors, food production line conveyors, simple filling transport mechanisms.

Suitable environment: Normal temperature, light dust; Direct spraying of high humidity & water vapor on control cabinet is forbidden.

4. Plastic & Rubber Machinery

Small conveyors, simple traction machines, light auxiliary extruder transport, small pelletizing conveying equipment.

5. Light-duty Machine Tools & Hardware Equipment

Small machine tool feed conveyors, simple rack feeding mechanisms, small grinder drive;

❌ Not suitable: Precision spindles, high-speed high-precision processing equipment (No encoder interface, insufficient positioning capability).

6. HVAC, Environmental Protection & Water Treatment Auxiliaries

Small waste gas treatment fans, water treatment dosing agitators, small sewage circulating pumps, dust removal branch fans.

7. Agricultural Machinery Accessories

Greenhouse circulating fans, water & fertilizer integrated machine transfer pumps, light material conveying equipment.

Not Recommended / Forbidden Application Scenarios

1. Lifting equipment, heavy hoists, elevators (No safety braking certification, strictly prohibited);
2. High-speed tension winding, frequent rapid braking with high inertia loads (No built-in braking chopper, prone to OV overvoltage fault);
3. High-precision positioning & synchronous control applications (No encoder feedback support);
4. Explosion hazardous areas (No explosion-proof certification);
5. Strong corrosive, high humidity, outdoor exposed environments without protection;
6. Impact heavy loads, crushers, large agitators.

Selection & Matching Recommendations

1. Frequent stop & high inertia loads → Select PI150 1R5G3Z (built-in braking chopper) + braking resistor;
2. Remote speed regulation via 4~20mA / 0~10V signal: Directly use onboard AI analog input;
3. Multi-drive monitoring via network: Adopt RS485 Modbus RTU communication;
4. Compact control cabinet layout: Supports 35mm DIN rail mounting, alternative to larger general-purpose VFDs.

Full Technical Specifications of Powtran PI150 1R5G3

Model Distinction: PI150 1R5G3 (Standard, without built-in braking chopper); PI150 1R5G3Z (Built-in braking chopper)

Brand: Powtran, Compact Economical Sensorless Vector Mini VFD

1. Model Code Breakdown

PI150: Compact economical vector inverter series

1R5: Rated power 1.5kW (R represents decimal point)

G: Constant torque general-duty model

3: 3-phase AC380V power supply

Z (Optional suffix): Built-in braking chopper; No Z = without built-in braking chopper

2. Main Circuit Rated Electrical Parameters

3. Control Performance Index

4. I/O Terminal Configuration (Control Circuit)

Digital Input DI

5-channel multi-function digital input terminals; NPN/PNP universal. Functions customizable: Run/Stop, Forward/Reverse, Multi-speed, Fault Reset, External Emergency Stop, etc.

Analog Input AI1

1-channel analog input, selectable via onboard jumper

0～10V DC voltage signal / 4～20mA current signal

Used for external speed setting or PID feedback signal

Output Signals

1. Relay Output (1 channel)

Contact Capacity: 5A/250VAC; 1A/30VDC; Can be defined as fault output, running status, frequency arrival and other 40 functions

2. DA1 Analog Output (1 channel)

0~10V / 0~20mA optional; Available signals: Output frequency, output current, DC bus voltage, output torque and other 16 monitoring signals

Communication Interface

Standard RS485, Modbus RTU / ASCII protocol; Support upper computer & PLC network control.

5. Built-in Function List
6. Built-in PID regulator: Support constant pressure water supply, constant flow, constant tension closed-loop control
7. Multi-speed operation: Up to 16 preset speeds
8. DC Braking: Pre-run DC braking & stopping DC braking; braking current and time adjustable
9. Jog operation, frequency skip function (avoid mechanical resonance point)
10. Speed tracking startup: Smooth startup when motor is still rotating
11. Timing operation function (Max. 6500 min)
12. Fast current limiting algorithm to suppress overcurrent faults
13. Independent acceleration/deceleration time setting: 0.0～6500.0 s
14. Complete Protection Functions

Overcurrent, Overvoltage, Undervoltage, VFD Overheat, Motor Overload, Output Earth Short Circuit, Stall Protection, External Fault, Communication Abnormality, PID Feedback Loss, Optional Input Phase Loss Detection.

7. Mechanical Dimensions & Installation Parameters

8. Ambient Operating Conditions

9. Important Selection Notes
10. For frequent braking & high inertia loads (rapid stop of conveyor lines): Must select 1R5G3Z + matched braking resistor; Standard version without braking chopper easily triggers OV overvoltage fault;
11. If motor cable length＞50m, reduce carrier frequency or install output reactor;
12. No encoder interface, High-precision position synchronization & closed-loop tension winding control are not supported;
13. G-type drive can be used for fan & pump variable torque loads; Select one power grade higher for heavy impact loads.