Operation manual for the TOYO TDOU-33 digital UV+OV protection relay, covering settings, wiring, and troubleshooting.
The TOYO TDOU-33 (fixed type) and TDOU-33D (draw‑out type) are micro‑processor based protection relays that monitor voltage and provide UV/OV trip functions. The manual describes the LCD panel, LED indicators, key functions, and the two timing curves (definite and normal inverse).
It provides step‑by‑step instructions for system setup, relay configuration, communication settings, password protection, fault memory handling, self‑test procedures, time/date setting, physical dimensions, wiring diagrams, and technical specifications. This manual is written in Chinese.
| Communication protocol | Modbus |
|---|---|
| Communication speed | 9600 / 19200 bps |
| Fault memory capacity | 32 records |
| Input voltage | AC/DC 80~260 V |
| Operating temperature | -10 °C ~ 60 °C (non‑condensing) |
| Rated frequency | AC 110 Hz |
| UV voltage setting range | 20~90 V (step 1 V) |
| OV voltage setting range | 100~160 V (step 1 V) |
| UV delay setting range | 50~120 V (step 1 V) |
| Trip reset time | 0.1~10 s |
In SYSTEM SETUP, use the S‑T keys to select 50 Hz or 60 Hz for SYS Freq, and the S‑T‑W‑X keys to set the PT ratio values.