AEG MM-PM10-300

Digital guide

Product Name: AEG MM-PM10-300 Motor Protection Relay (Motor Management Relay)
Product Category: Motor Protection / Monitoring Device
Model Series: AEG MM-PM10 Series
Current Range: 0.1 – 300A (via external CT)
Protection Functions: Overload, Short-Circuit, Phase Loss, Phase Reversal, Ground Fault

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Detailed content

Product Description:
The AEG MM-PM10-300 is a microprocessor-based motor protection relay from the AEG MM series, designed for comprehensive protection and monitoring of three-phase AC induction motors. It continuously monitors motor current and provides multiple protection functions with adjustable trip settings. The “300” designation indicates a maximum current measurement range of 300A (via external current transformers).

Technical Specifications:

Current Measurement Range: 0.1A – 300A (via external CT, ratio selectable: 50/5A to 600/5A)
Voltage Input: 100V – 690V AC (3-phase, direct connection or via PT)
Auxiliary Power Supply: 24V – 240V AC/DC (universal)
Overload Protection (Class 10 / Class 20 / Class 30): Adjustable trip current: 0.4 – 1.0 × In; Trip time: 2 – 30 seconds (inverse time)
Short-Circuit Protection (Instantaneous): Adjustable: 2 – 15 × In; Trip time: ≤ 20ms
Phase Loss Protection: Detects loss of any one phase; Trip delay: 0.5 – 30s (adjustable)
Phase Reversal Protection: Detects incorrect phase sequence; Trip: instantaneous
Ground Fault Protection (Sensitive): Adjustable: 0.1 – 1.0 × In; Trip time: ≤ 100ms
Thermal Model: I²t thermal motor model with thermal memory (RTD/PTC input optional)
Digital Inputs: 3× DI (motor start/stop, reset, external fault)
Digital Outputs: 2× DO (trip relay + alarm relay), Rating: 5A / 250V AC (resistive)
Communication: RS-485 (Modbus RTU), baud rate: 9600 – 115200 bps
Accuracy: ±1% (current), ±0.5% (voltage)
Standards Compliance: IEC 60947-6-2, IEC 60255, EN 60947-6-2, UL 508
Protection Rating: IP20 (front panel), IP40 (with cover)
Installation: DIN 35mm rail (EN 60715 TH35)
Dimensions (W×H×D): 72mm × 105mm × 110mm
Weight: ~400g

Protection Functions Detail:

Function	Setting Range	Trip Time
Overload (L)	0.4–1.0 × In	Inverse time (2–30s)
Short Circuit (I)	2–15 × In	≤ 20ms (instantaneous)
Phase Loss (Δ)	0.5–30s delay	Adjustable
Phase Reversal (↔)	Instantaneous	≤ 50ms
Ground Fault (G)	0.1–1.0 × In	≤ 100ms
Unbalance (U)	5–30% current unbalance	2–30s
Lock Rotor (LR)	4–8 × In	0.5–5s
Start Time Monitor	0.5–60s	Adjustable

Material Composition:

Housing: Polycarbonate (PC) + ABS blend — UL94 V-0, halogen-free
Terminals: Tin-plated copper alloy, screw terminal (1.5–4mm²)
Display: Front-panel LED indicators (Power, Run, Trip, Alarm) + optional LCD display variant

Structural Features:

DIN rail mounting with snap-lock mechanism
Front-accessible terminal connection (no rear wiring required)
Rotary dial + push-button for parameter setting (no PC software required for basic configuration)
Optional LCD display module for real-time current/voltage readout

Advantages: