This document introduces the technical parameters and characteristics of the MTR-A time relay, including the working modes of delay mode and widening mode, automatic correction of relay action time, wide delay range, high accuracy, etc. This time relay is suitable for relay protection of secondary circuits in power systems and time logic coordination and setting in industrial control systems.
The MTR‑A digital time relay from ODES offers two operating modes—delay mode (delay action, instantaneous return) and widening mode (instantaneous action, delay return). It features a wide delay range, high accuracy, and convenient adjustment for power system secondary protection and industrial control timing.
The manual describes rail‑mount installation, terminal definitions, and typical wiring. Time values are set with three panel dials (a, b, k) while the device is powered off; new settings become effective after power is restored. Ordering information and model naming rules are also provided. This manual is written in Chinese.
| Rated start voltage (DC) | 220 V, 110 V |
|---|---|
| Contact current rating | 8 A |
| Arc extinguishing capacity | 60 V W (220 VDC) ; 2000 VA |
| Operating voltage limit | ≤ 70 % Un |
| Time adjustment range | 20 ms – 99 h |
| Contact type | 1 NO + 1 NC or 2 NO |
| Installation method | Rail mounting |
| Length | 140 mm |
The relay can operate in delay mode (delay action, instantaneous return) or widening mode (instantaneous action, delay return).
The relay is rated for 220 V DC or 110 V DC start voltage.
The contacts can carry up to 8 A.