Panel | Digital ammeter with overcurrent protection and warning signal | with current transformer (CT) 400A | 150-270VAC

Technical Specifications:
Power Supply (Un): 150V - 270V AC
Frequency: 50/60 Hz
Maximum Power: <4VA
Operating Temperature: -20°C to +55°C
Measurement Accuracy: ±2%
Display: Digital LED screens (20mm and 14mm)
Connection Type: Plug-in terminal
Maximum Cable Diameter: 1.5mm²
Maximum Weight: 300g
Panel Cutout Size: 91x91mm
Mounting: Front panel mounting
Operating Altitude: <2000m
Current Transformer (CT): 400A  
Functions and Operating Principle:
1. Overcurrent Monitoring and Protection:
The device monitors the electrical current and automatically disconnects the relay when the set limit is exceeded.
2. Current Setting:
Press and hold the up/down buttons (3 sec.) to enter the current transformer (CT) value.
After 3 seconds, the device saves the setting and returns to normal operation.
3. Setting the Maximum Current Limit:
In normal screen mode, use the buttons to set the upper current limit.
When the current exceeds this limit, the relay disconnects the current, and the warning LED indicator (ERR) is activated.
When the current decreases by 0.5A below the set limit, the relay automatically turns on, and the error indicator turns off.
4. Additional Protections:
Can operate in warning mode only, activating an alarm without relay operation when the limit is reached.
Automatic activation after current returns to a normal range.
5. Safety Recommendations:
Do not use the device in humid environments.
Install a separate switch and fuse for device protection.
Before installation, clearly label the switch and fuse as the primary disconnection source.
Applications:
Electrical Panels: Monitors and protects electrical circuits from overcurrent.
Industrial Automation: Used to protect production lines and electrical control systems.
Protection Systems: Ensures proper power distribution and prevents system overheating.
Generators and Inverters: Prevents overloads and ensures safe operation.
Laboratories and Research Facilities: Suitable for scientific research, testing, and electrical system analysis.
Pros:
High measurement accuracy (±2%)
Integrated overcurrent protection – automatically disconnects power at the limit value
LED display – clearly shows measurement results and error indications
Automatic on/off based on current limits
Can function in warning mode without automatic disconnection
Suitable for both industrial and household use
Easy panel mounting

Cons:
May require additional calibration based on the electrical system
No isolated connection function, so separate switches must be used
Requires an additional fuse for short-circuit protection

This panel-mounted digital ammeter with overcurrent protection and warning signal is essential for electrical system protection, especially in industrial equipment, generators, and inverters. Its functionality allows both active device protection against overloads and use as a simple monitoring device with visual warnings. It is an excellent choice for those seeking a reliable and versatile electrical circuit monitoring solution.