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GE THED136125
Product Name: GE THED Series 3-Pole Molded Case Circuit Breaker (MCCB)
Overview: The THED136125 is a high interrupting capacity, bolt-on molded case circuit breaker from GE’s E150 line. It provides overcurrent and short-circuit protection for three-phase commercial and industrial power distribution systems and serves as a direct replacement for legacy TED136125 units.
Detailed content
Technical Specifications:
- Frame Type: E150, THED series
- Poles: 3
- Rated Current: 125 A
- Voltage Rating: 240 / 480 / 600 VAC, 250 / 500 VDC
- Interrupting Capacity (AIC):
- 65 kA @ 240 VAC
- 25 kA @ 480 VAC
- 18 kA @ 600 VAC
- 10 kA @ 250 VDC
- 10 kA @ 500 VDC
- Trip Type: Fixed thermal-magnetic, LI (long-time + instantaneous) functions
- Mounting: Bolt-on, feed-through
- Terminals: Line and load lug terminals, Cu/Al rated
- Wire Range: 3 AWG – 3/0 AWG (Copper), 1 AWG – 3/0 AWG (Aluminum)
- Temperature Rating: 40 °C
- Standards: UL 489, CSA C22.2 No.5, NEMA AB-1, HACR rated, reverse feed capable
- Dimensions: 4-1/8 in (W) × 3-3/8 in (D) × 6-5/16 in (H)
- Options: Shunt trip, auxiliary switch, undervoltage release, alarm switch, padlock attachment
Structural Features: Molded case housing with quick-make/quick-break, trip-free mechanism; non-interchangeable trip unit; high interrupting capacity construction; bolt-on frame with lug terminals for secure panellboard mounting.
Functional Features: Thermal-magnetic trip delivers long-time overload protection and instantaneous short-circuit protection; HACR rated for heating, air-conditioning and refrigeration circuits; reverse feed capable; trip-free design prevents manual hold-closed during fault.
Application Scenarios: GE A-Series and Spectra Series panelboards; motor control centers; 600 VAC three-phase commercial and industrial power distribution; HVAC and refrigeration disconnect protection.
Working Principle: Under sustained overload the bimetallic thermal element heats and bends, tripping the mechanism after a time inversely proportional to the current magnitude (long-time characteristic). Under a short-circuit the electromagnetic coil generates a instantaneous magnetic force that releases the latch immediately (instantaneous characteristic). Both actions open the contacts and isolate the faulted circuit.
Installation Requirements: Mount as a bolt-on breaker in a compatible GE panelboard or MCC; torque the line and load lugs to the specified value for the conductor size; verify the supply phase sequence; install optional accessories (shunt trip, auxiliary contacts) per the relevant GE wiring diagram.
Usage Precautions: De-energize and lock out the panel before installation or removal; verify the breaker’s AIC rating meets the available fault current at the installation point; do not exceed 40 °C ambient unless the ampacity is derated; confirm polarity for reverse-feed applications.
