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AEG AM-C916-100
Product Introduction:
The AEG AM-C916-100 is a motor protection and control relay designed for the monitoring, protection, and switching of three-phase AC motors. It provides comprehensive motor management including overload protection, phase failure detection, under/over-voltage protection, and remote control capabilities. The “100” designation indicates a 100 A rated current capacity.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Rated Current (In) | 100 A |
| Rated Voltage (Ue) | 690 V AC (max) |
| Control Voltage (Us) | 24–240 V AC/DC |
| Pole Configuration | 3-Pole (3P) |
| Trip Class | Class 10 (overload), Class 20 (short-circuit) |
| Frequency | 50/60 Hz |
| Auxiliary Contacts | 2 NO + 2 NC (changeover) |
| Standards Compliance | IEC 60947-4-1, IEC 60947-6-2, EN 60947-4-1 |
| Degree of Protection | IP20 (front), IP54 (with cover) |
| Ambient Temperature | -25°C to +60°C |
| Mounting | DIN 35 mm rail or screw mounting |
Material Composition:
- Housing: Glass-fibre reinforced polycarbonate (self-extinguishing, UL94 V-0)
- Terminals: Silver-plated copper alloy
- Internal Relay Contacts: AgNi (silver-nickel) for switching contacts
- PCB: FR-4 with conformal coating
- Operating Mechanism: Electromagnetic latching relay
Structural Features:
- Front-panel LED indicators for power, trip, and fault status
- Rotary dial for current range setting (70–100 A)
- Push-button test and reset functions
- DIN rail clip for secure mounting
- Wiring terminals on top and bottom for flexible cable routing
- Transparent cover option for visual inspection of status flags
Working Principle:
The relay continuously monitors the three-phase motor current via built-in current transformers (CT) or external CTs. The electronic processing unit compares the measured values against user-configurable thresholds. Upon detecting an overload condition, the thermal model calculates the accumulated thermal stress and triggers a time-delayed trip. For phase failure, under-voltage, over-voltage, and phase imbalance, instantaneous or time-delayed trips are executed. The output relay contacts control the contactor coil circuit, disconnecting the motor from the supply.
Functional Features:
- Adjustable overload protection: 0.4–1.0 × In
- Phase failure / phase reversal detection
- Under-voltage protection: 0.3–0.85 × Ue
- Over-voltage protection: 1.1–1.3 × Ue
- Phase imbalance detection: >15% imbalance triggers alarm/trip
- Motor start-up current compensation (I²t)
- Remote reset via auxiliary contact input
- Option: communication module (Modbus RTU)
Performance Parameters:
| Parameter | Value |
|---|---|
| Overload Trip Accuracy | ±5% at 1.0 × In |
| Short-Circuit Trip Time | < 20 ms at 10 × In |
| Electrical Endurance | 100,000 operations (at rated load) |
| Mechanical Endurance | 1,000,000 operations |
| Response Time (Under-voltage) | < 100 ms |
Advantages & Highlights:
- Comprehensive motor protection in a single compact device
- Wide control voltage range (24–240 V) for flexible system integration
- Dual auxiliary contact sets for signalling and interlocking
- Front-panel adjustable settings eliminate need for external potentiometers
- Replaceable design reduces downtime during maintenance
Applicable Industries:
- Pump stations
- HVAC systems
- Conveyor systems
- Compressors
- Fan and blower drives
- General industrial motor applications
Installation Requirements:
- Mount on DIN 35 mm rail with adequate spacing (minimum 10 mm between units)
- Connect control wiring to top terminals (control), bottom terminals (power)
- Torque screw terminals to 1.2 Nm
- Ensure proper CT ratio matching if using external current transformers
- Ground the relay chassis to the main earthing bar
Usage Precautions:
- Do not exceed the rated current of 100 A continuously
- Verify CT ratio before commissioning when using external CTs
- Do not cover ventilation slots on the housing
- Reset only after the fault condition has been cleared
- Perform functional test monthly per maintenance schedule
