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JT3125T
The JT3125T from Eaton Cutler-Hammer is a thermal-magnetic trip unit designed to provide reliable circuit protection. Featuring three poles and a continuous current rating of 125 A, this unit operates effectively at AC voltages up to 600 Vac and DC voltages up to 250 Vdc.
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Technical specifications for JT3125T
| Manufacturer | Eaton Cutler-Hammer |
|---|---|
| Product Type | Thermal-Magnetic Trip Unit |
| Product Line | Series C Circuit Breakers |
| Part Number | JT3125T |
| Weight | 1.31 lbs (0.60 kg) |
| UPC | 786679404126 |
| Poles | Three Poles |
| Continuous Current Rating | 125 Amps |
| Maximum AC Voltage | Up to 600 Vac |
| Maximum DC Voltage | Up to 250 Vdc |
| Thermal Element | Fixed Long-Time Thermal |
| Protection Type | Thermal-Magnetic |
| Magnetic Adjustment | Adjustable Instantaneous Trip |
| Instantaneous Pickup | ~5–10× Rated Current |
| Frequency Compatibility | 50/60 Hz |
| Termination Style | Cable-In / Cable-Out |
| Ambient Temperature (Baseline) | Calibrated at 40 °C |
The Eaton Cutler-Hammer JT3125T is a thermal-magnetic trip unit engineered for robust performance in circuit protection applications. With three poles, this unit is capable of handling continuous currents rated at 125 Amps. It can operate with alternating current (AC) voltages up to 600 Vac and direct current (DC) voltages reaching 250 Vdc.
The JT3125T incorporates a fixed long-time thermal element, enabling it to respond accurately to sustained overloads. This model also features a magnetic adjustment function that allows for an adjustable instantaneous trip, which is set to activate around 5 to 10 times the rated current. This flexibility provides added protection against sudden surges that could potentially harm connected equipment.
Designed to function effectively in both 50 and 60 Hz frequency environments, this trip unit ensures compatibility across various electrical systems. The cable-in/cable-out termination style facilitates straightforward installation and wiring, simplifying integration into existing setups. For reliable performance, the unit is calibrated at a baseline ambient temperature of 40 °C, ensuring effective protection in typical operating conditions.
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