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- Last added
- 2026-09-28
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TOYO TDOU-33 Protection Relay Operation Manual
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.
Covers: Model Overview · Panel Description · Main Functions · Relay Setup · System Setup · Security Settings
Latest Toyo manuals
TOYO TDOU-33 Protection Relay Operation Manual
User Manual 8 pages · 499 KB · ZHOperation manual for the TOYO TDOU-33 digital UV+OV protection relay, covering settings, wiring, and troubleshooting.
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in Toyo manuals
How do I configure system frequency and PT ratio?
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.