Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of the ABB TMAX XT1C 160 Molded Case Circuit Breaker (MCCB). Please read this manual thoroughly before attempting any installation or operation.
Safety Information
WARNING: Electrical shock hazard. Only qualified personnel should install, operate, or maintain this device.
- Disconnect all power before working on the circuit breaker.
- Use appropriate personal protective equipment (PPE), including insulated gloves and eye protection.
- Follow all local and national electrical codes and regulations.
- Do not operate the circuit breaker if it is visibly damaged or if any components are missing.
- Ensure proper grounding where required.
Product Overview
The ABB TMAX XT1C 160 is a 3-pole fixed molded case circuit breaker with a thermomagnetic release, designed for protection against overloads and short circuits in electrical systems. It features front terminals for easy connection.
This image shows the ABB TMAX XT1C 160 circuit breaker. Key features visible include the ABB logo, the SACE Tmax branding, the 'off' position indicator, and the current rating adjustment dials (MED 106A, MAX 125A). The top section displays technical specifications such as rated operational voltage (Ue), rated ultimate short-circuit breaking capacity (Icu), and rated impulse withstand voltage (Uimp). The breaker is a 3-pole design with front terminals.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | XT1C 160 |
| Current Rating | 125 Amps |
| Number of Poles | 3 |
| Circuit Breaker Type | Standard, Thermal-Magnetic |
| Mounting Type | DIN Rail Mount |
| Rated Operational Voltage (Ue) | 690V AC, 500V DC |
| Rated Ultimate Short-Circuit Breaking Capacity (Icu) | 25kA @ 415VAC |
| Rated Impulse Withstand Voltage (Uimp) | 8kV |
| Release Type | Thermomagnetic (TMD) |
| Terminals | Front |
| Standards | IEC60947-2, NEMA AB1 |
| Manufacturer | ABB |
| ASIN | B07JJL7XGD |
Installation
Before Installation: Ensure the power supply is disconnected and locked out according to safety procedures. Verify the circuit breaker's ratings match the application requirements.
Mounting
The XT1C 160 is designed for DIN rail mounting.
- Securely attach the DIN rail to the mounting surface in the electrical enclosure.
- Align the circuit breaker's rear clips with the DIN rail.
- Press firmly until the breaker clicks into place, ensuring it is securely fastened.
Wiring
Connect the power supply and load cables to the designated front terminals.
- Connect incoming phase conductors to the top terminals (L1, L2, L3).
- Connect outgoing load conductors to the bottom terminals (T1, T2, T3).
- Ensure all connections are tight and secure to prevent overheating and arcing. Use a torque wrench to achieve specified torque values.
- Use appropriate wire gauges for the current rating to avoid overheating.
Operation
Switching On/Off
The circuit breaker has a toggle handle for manual operation.
- To switch ON: Push the handle upwards to the "ON" position.
- To switch OFF: Push the handle downwards to the "OFF" position.
- In case of a trip: The handle will move to an intermediate "TRIP" position. To reset, push the handle fully down to "OFF" first, then push it up to "ON".
Current Adjustment (TMD Release)
The thermomagnetic release allows for adjustment of the rated current (In) and instantaneous trip setting.
- The nominal current (In) can be set between 106A (MED) and 125A (MAX) using the adjustment dial on the front face of the breaker.
- The instantaneous trip setting (Ii) is typically fixed or adjustable within a specific range, as indicated on the device's label. Consult the product datasheet for precise values.
Maintenance
Regular maintenance ensures the longevity and reliable operation of the circuit breaker. Always disconnect power before performing any maintenance.
- Periodic Inspection: Visually inspect the circuit breaker for any signs of physical damage, discoloration, or loose connections. Check for dust accumulation, especially in ventilation openings.
- Cleaning: Disconnect power before cleaning. Use a dry, clean, lint-free cloth to wipe the exterior. Do not use solvents, abrasive cleaners, or liquids that could enter the breaker.
- Terminal Tightness: Periodically check the tightness of all terminal connections. Loose connections can lead to increased resistance, overheating, and potential failure.
- Functional Test: If possible and safe, perform periodic functional tests according to ABB guidelines or relevant industry standards to verify proper tripping characteristics.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Breaker trips frequently | Overload or short circuit in the protected circuit. | Identify and remove the overload. Check for short circuits in the connected circuit using appropriate testing equipment. |
| Breaker does not reset after tripping | Persistent fault in the circuit or internal damage to the breaker. | Ensure the fault is completely cleared. If it still doesn't reset, the breaker may be damaged internally and require replacement by a qualified technician. |
| Overheating at terminals | Loose connections or undersized wiring for the load. | Disconnect power and tighten terminal screws to the specified torque. Verify wire gauge is appropriate for the maximum current. |
| Breaker does not trip on fault | Breaker malfunction or incorrect rating for the application. | Immediately disconnect power. Do not use the breaker. It must be inspected and potentially replaced by a qualified professional. Verify the breaker's ratings match the system requirements. |
Warranty and Support
For detailed warranty information and technical support, please refer to the official ABB website or contact your authorized ABB distributor. Keep your purchase receipt for warranty claims.
Manufacturer: ABB
ASIN: B07JJL7XGD
Date First Available: July 3, 2019
For further assistance, visit the ABB Store on Amazon.
