AMDL series motor protectors are motor protection devices used for star/delta starting. It uses a microcontroller as the core, with digital setting and digital display functions, complete protection functions, and reliable performance. It is suitable for three-phase AC motors with voltages less than 1140V and frequencies of 50Hz or 60Hz. It has protection functions such as grounding, short circuit, phase loss, stalling, three-phase current imbalance, and overload.
The AMDL series motor protection devices provide digital core control, adjustable current settings, and comprehensive protection functions such as ground fault, short‑circuit, overload, and phase‑unbalance detection. The manual describes the operating principles of star‑delta control, wiring diagrams, and the function of contactors and indicator lights.
Technical data for each model (AMDL‑5, AMDL‑10, AMDL‑20, AMDL‑50, AMDL‑100, AMDL‑150, AMDL‑200) are listed, including rated current, power consumption, contact ratings, operating temperature range, and installation dimensions. The document also explains the control circuit analysis and the steps for normal start, reverse start, and stop operations. This manual is written in Chinese.
| Power consumption | 2 W |
|---|---|
| Current setting accuracy | 1.0 % |
| Operating voltage | AC 220 V ±20 % |
| Operating temperature range | -20 °C to 50 °C |
| Maximum rated phase current (AMDL‑5) | 5.5 A |
The devices protect against ground fault, short‑circuit, overload, phase‑unbalance, and other fault conditions.
The device consumes about 2 W of power.
The device operates from –20 °C up to 50 °C.