Precision Protection for Low-Voltage Power Systems
The Siemens RMS-TIG-TZ-C provides adjustable electronic overcurrent protection for Siemens low-voltage power circuit breakers. This Static Trip III unit continuously monitors phase currents and initiates tripping actions during fault conditions. The device features a modular design that plugs directly into compatible circuit breaker frames. Its microprocessor-based architecture ensures accurate and repeatable protection settings.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | Siemens RMS-TIG-TZ-C |
| Brand | Siemens |
| Category | Electronic Trip Unit / Protection Relay |
| Product Family | Static Trip III (ST III) Series |
| Application | Low-voltage power circuit breakers (e.g., 600V class) |
| Protection Functions | Long-time, short-time, instantaneous, ground fault |
| Adjustment Dials | Multiple dials for current and time settings |
| Power Supply | Self-powered from current sensors (no external source needed) |
| Mounting | Plugs into breaker frame (e.g., RMS, RL, RJ styles) |
| Indicators | Status LEDs and optional target indicator |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Weight | Lightweight (approx. 1-2 kg depending on configuration) |
Protection Functions and Adjustability
The trip unit provides four essential protection functions for comprehensive circuit protection. Long-time pickup and delay settings prevent nuisance tripping during normal overload conditions. Short-time pickup and delay settings coordinate with downstream devices for selective coordination. Instantaneous protection responds rapidly to high-magnitude fault currents. Ground fault detection enhances system safety by identifying leakage currents.
Physical Design and Installation
The Siemens RMS-TIG-TZ-C mounts directly into the designated compartment of compatible Siemens breakers. The user interface features clearly labeled adjustment dials for all protection parameters. Installation requires only inserting the unit and securing it in place. The self-powered design eliminates the need for external control power connections.
Compatibility and System Integration
This trip unit fits Siemens RMS, RL, and RJ breaker frame styles. Users must verify frame compatibility before installation to ensure proper fit and function. The unit operates with various interrupting capacities and continuous current ratings.
Operational Reliability
The microprocessor-based design provides stable protection settings that do not drift over time. Self-powered operation ensures protection remains available even during loss of control power. The rugged construction withstands the mechanical and thermal stresses of normal breaker operation. Status indicators assist with troubleshooting and maintenance activities.
Details
| Weight | 1.2 kg |
|---|---|
| Dimensions | 50 × 290 × 217 mm |
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