Eaton NDC3800T33WP10S11Z09 MCCB Unit

Module Feature

NDC3800T33WP10S11Z09 belongs to Eaton Cutler-Hammer Series G NDC molded case circuit breaker. It is a three-pole heavy-duty distribution MCCB with 800A frame size, equipped with electronic LS long-time and short-time delay trip unit.

It features high short-circuit interrupt capacity at 480V, supports adjustable overload and short-circuit protection settings. This configuration includes shunt trip coil accessory, suitable for remote tripping function. Widely used in industrial power distribution cabinets, MCC, large feeder protection for factory, water treatment and power plant low voltage systems.

Working principle

Electronic trip unit continuously samples three-phase current signal. When current exceeds long-time overload threshold, it triggers delayed trip. When short-circuit fault occurs, short-time protection acts rapidly to cut off the circuit. The shunt trip coil can receive external control signal for remote opening command. Arc quenching chamber extinguishes electric arc during breaking.

Onboard components

Electronic trip controller, current transformer set, contact assembly, arc chute, operating mechanism, shunt trip coil, molded insulating housing, terminal base.

LED indicators

Trip unit has status LED for alarm and protection indication.

Hardware self‑diagnosis

Electronic trip module monitors internal power supply and sampling channel, reports trip alarm and fault code, supports test function via trip unit button.

Programming software

Eaton Power Software, used for protection curve configuration and parameter verification.

Electrical & Process Parameters

Model:NDC3800T33WP10S11Z09 Brand:Eaton (Cutler-Hammer) Device type:Electronic Trip MCCB Poles:3P Frame:800A Rated voltage:600V AC Trip type:LS electronic trip Function:Overload, short-circuit protection, remote shunt trip

Mechanical & Structure

Mounting:Cabinet fixed mounting Protection class:IP20 front face Housing:Flame retardant thermoset plastic

Environmental

Operating temperature:-25℃ ~ +60℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:UL, CE Status:Eaton original power distribution spare

Installation

Install inside power cabinet, tighten bus connections to specified torque. Set protection parameters according to feeder requirement. Verify shunt trip wiring polarity before energizing. Periodically check contact temperature rise.

Interface

Main line/load terminals, shunt trip control terminals, trip unit test port.

Diagnostic

Unintentional tripping: Overload, protection setting value too low, phase unbalance. Cannot remote trip: Shunt trip coil power supply missing or coil burned. Trip unit no display: Auxiliary power loss of electronic trip. High temperature alarm: Loose bus connection, overloaded running.

Product BriefEaton NDC3800T33WP10S11Z09 Series G 3P 800A electronic molded case circuit breaker, for industrial low voltage feeder power distribution protection.