Terrax Automatic Phase Selector 125A

📌 Product: Automatic Phase Switch – TS3PS-125A

🔹 Features

* True RMS measurement
* Digital display for voltage & current values
* Protection against **over/under-voltage** and **overcurrent**
* Neutral loss detection
* Parameter setting via keys (with password protection option)
* 8 modules, DIN rail mounting

—

🔹 Technical Data

Operation voltage range:** AC 45V ~ 450V
Rated supply voltage:** AC 220V
Rated frequency:** 50/60Hz
* **Overvoltage setting range:** 220–300V
* **Undervoltage setting range:** 80–210V
* **Current rating:** 1A–125A
* **Max permissible current:** 150A
* **Overcurrent trip delay:** adjustable (0.1s to 600s)
* **Continuous overcurrent times:** OFF – 1~20
* **Short circuit fault trip delay (Tsd):** 0s–5s
* **Hysteresis:** Overvoltage & asymmetry: 5V; Undervoltage: 3V
* **Voltage measurement accuracy:** ±1%
* **Output contact:** 1NO
* **Rated insulation voltage:** 450V
* **Protection degree:** IP20
* **Altitude:** ≤ 2000m
* **Operating temperature:** -20°C to +55°C
* **Mechanical life:** 10⁶
* **Electrical life:** 10⁴

—

🔹 Protection Functions

1. **Overvoltage / Undervoltage** → trips with adjustable delay
2. **Overcurrent protection** with configurable delays
3. **Short-circuit protection** with fast trip (0.04s at 0s setting)
4. **Neutral loss detection**
5. **Phase sequence & phase failure detection**
6. **Priority phase switching**:

* **Priority ON:** Always returns to preferred phase when stable
* **Priority OFF:** Switches sequentially L1 → L2 → L3

—

🔹 Settings (Configurable by Keys)

* Umax (Overvoltage trip value): 220V–300V
* Umin (Undervoltage trip value): 80V–210V
* Overcurrent setting: 1A–125A
* Start/Reclose delay: 1s–600s
* Return to priority phase delay: 5s–600s (or OFF)
* Switch delay between reserve phases: 0s–20s
* Password setting: 000–999 (optional lock)

—

🔹 Indicators & Display

* Voltage display: L1, L2, L3
* Current display
* Delay timers shown on lower display during switching
* Fault codes for:

* Overvoltage / Undervoltage
* Overcurrent
* Relay output fault
* Continuous faults exceeded

—

🔹 Safety Precautions

* Installation must be by a qualified person
* Disconnect all power before wiring
* Avoid moisture, corrosive gas, or direct sunlight
* Do not dismantle/repair by yourself
* Clean only with a dry cloth
* Incorrect use may result in serious injury or death

—

🔹 Dimensions (mm)

* **Width:** 143
* **Height:** 90
* **Depth:** 67.5
* **DIN rail mount:** 8 modules

—

🔹 Typical Applications

* Automatic transfer between 3 phases for loads (e.g., motors, ACs, pumps)
* Protecting equipment from **voltage fluctuations** and **phase failures**
* Useful in areas with unstable or single-phase outages