Features:
Dual Trip Optional: TM provides basic overload/short circuit protection at low cost; ETU supports adjustable short delay and selective coordination; VT2-VT5 trip units can be field-replaced to adapt to load changes.
Breakdown and Safety: Breaking capacity 25-50kA, highly efficient arc extinguishing; phase separators enhance insulation, fixed IP20 protection meets industrial safety requirements.
Installation and Maintenance: Insert/retractable design supports external cabinet operation for quick replacement and maintenance; no derating at 40℃, suitable for harsh environments.
Universal Accessories: Three categories of internal accessories cover the entire series; shunt excitation, undervoltage, auxiliary contacts, etc., can be added as needed, simplifying inventory and selection.
Flexible Applications: Supports line protection (distribution) and motor protection (direct starting), adaptable to different load curves; ETU short delay optimizes selectivity between upper and lower levels.
Typical Applications:
Industrial Sector: Factory secondary power distribution, motor control circuits, frequency converter cabinets, transformer/capacitor protection; ETU adapts to complex selective coordination scenarios.
Public and Commercial Buildings & Infrastructure: Building trunk lines, power circuits for air conditioning/water pumps, data center UPS inputs/outputs; plug-in/retractable design for easy maintenance (Siemens China).
Energy & Municipal: Photovoltaic/energy storage inverter outputs, charging pile power distribution, municipal pump stations/lighting; TM/ETU adapts to different protection requirements.
