The Siemens RMS-TSIG-TZ RMS-TSIG-TZ-C RMS-TSIG-TZ-R series represents a versatile family of electronic trip units for molded case circuit breakers. These trip units provide precise overcurrent and short-circuit protection for industrial distribution systems. The family includes three variants: the base RMS-TSIG-TZ, the RMS-TSIG-TZ-C with communication, and the RMS-TSIG-TZ-R with remote reset functionality.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Family | RMS-TSIG-TZ, RMS-TSIG-TZ-C, RMS-TSIG-TZ-R |
| Number of Poles | 3 poles (configurable for 4-pole) |
| Rated Current Range | 0.5A to 6A (adjustable) |
| Trip Class | 5, 10, 20, 30 (selectable) |
| Protection Functions | Overload, short-circuit, ground fault |
| Display | Backlit LCD (128 x 64 pixels) |
| Communication (C variant) | Modbus RTU over RS-485 |
| Remote Reset (R variant) | 24V DC input for external reset |
| Dimensions (W x H x D) | 120 x 80 x 70 mm |
| Weight | 0.45 kg (base), 0.48 kg (C/R variants) |
| Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Number of Current Sensors | 3 x Rogowski coils |
| Internal Memory | 4 MB EEPROM for event logging |
| Terminal Type | Plug-in connectors (12 pins) |
| Power Supply | 24V DC (external, from breaker auxiliary) |
| Approvals | UL 489, IEC 60947-2, CCC |
Advanced Protection Logic and Adjustability
The Siemens RMS-TSIG-TZ RMS-TSIG-TZ-C RMS-TSIG-TZ-R base model offers comprehensive protection with selectable trip classes from 5 to 30. Users can adjust the rated current from 0.5A to 6A to match specific load requirements. Three Rogowski coils provide accurate current sensing across the entire range. The unit continuously monitors phase currents and triggers a trip when it detects overcurrent or short-circuit conditions.
Communication Variant for Smart Grid Integration
The Siemens RMS-TSIG-TZ RMS-TSIG-TZ-C RMS-TSIG-TZ-R adds Modbus RTU communication over RS-485 for remote monitoring. This variant transmits real-time current readings, trip status, and event logs to a central control system. Operators can adjust trip parameters remotely without opening the switchgear panel. The communication interface supports daisy-chaining multiple trip units on a single network.
Remote Reset Capability for Unattended Locations
The Siemens RMS-TSIG-TZ-R features a 24V DC input for external reset signals. This variant allows automatic reset from a supervisory control system after fault clearance. This remote reset capability proves especially valuable for installations in remote or hazardous locations. The external reset input accepts pulses of 100 ms minimum duration.
User-Friendly Interface and Diagnostics
A backlit LCD display with 128 x 64 pixel resolution shows real-time current values for each phase. The display also indicates the active trip class, protection status, and any active fault codes. Four membrane buttons allow users to navigate menus and adjust parameters easily. The internal 4 MB EEPROM stores up to 100 event records with timestamps for diagnostics.
Compact Mechanical Design and Installation
The trip unit measures 120 x 80 x 70 mm and weighs approximately 0.45 kg for the base model. Plug-in connectors with 12 pins provide secure electrical connections to the breaker’s internal wiring. The device operates reliably from -25°C to +70°C for demanding industrial environments.
Details
| Weight | 1.2 kg |
|---|---|
| Dimensions | 50 × 290 × 217 mm |
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