Key facts
- Brand
- Schneider
- Model
- ATV21
- Documents
- 6
- Languages
- ZH · EN
- Last added
- 2012-03-21
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Schneider Electric ATV 21 Frequency Transformer User Manual
The ATV 21 frequency transformer is intended for general industrial use to control the speed of three‑phase induction motors. This user manual covers the required safety precautions, installation steps, wiring guidelines, operating procedures and maintenance practices.
Key sections include safety symbols and warnings, transport and installation requirements, wiring restrictions, electrical installation procedures, routine inspection, and proper disposal of the unit. The document also specifies required emergency stop devices and recommended protective measures. This manual is written in Chinese.
Schneider ATV21 specifications
| Input voltage tolerance | +10% to -15% |
|---|---|
| Maximum measurable DC voltage for testing | 800 V DC or higher |
| Maximum output voltage to PC side | 5 V |
Source: Schneider ATV 21 Motor Frequency Transformer User Manual
All Schneider ATV21 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Disassembly, diagnostics and part numbers, for repair.
Questions answered in these manuals
What should be done if the transformer starts to smoke, emit an odor or unusual sounds?
Immediately turn off the power and contact the local sales agent for repair.
From: Schneider Electric ATV 21 Frequency Transformer User Manual
Is it allowed to connect the input power to the output motor terminals?
No. Connecting the input power to the output terminals is prohibited and may cause fire.
From: Schneider Electric ATV 21 Frequency Transformer User Manual
Can the ATV 21 be used for safety‑critical equipment?
No. The transformer must not be used for any equipment where a fault could endanger lives.
From: Schneider ATV 21 Motor Frequency Transformer User Manual
What power range does the ATV21 support?
The ATV21 can drive three‑phase asynchronous motors from 0.75 kW up to 75 kW.
What are the operating temperature limits?
It operates from –10 °C to +40 °C without derating and up to +50 °C with derating.
What communication protocols does the ATV21 support?
The ATV21 supports Modbus, Lonworks, BACnet, MetasysN2 and Apogee FLN.