Siemens HDM3M150L Circuit Breaker Unit

Module Feature

HDM3M150L is Siemens VL series molded case circuit breaker. It is a mid‑magnetic type 3‑pole breaker with rated current 150A and 65kA breaking capacity. It adopts lug terminal connection, integrates thermal‑magnetic trip function, used for overload and short‑circuit protection in low‑voltage distribution cabinets.

Working principle

Thermal bimetallic strip triggers tripping for long‑time overload protection. Magnetic trip unit acts rapidly when short‑circuit current occurs to cut off the power circuit and protect downstream cables and loads.

Onboard components

Thermal‑magnetic trip unit, contact assembly, arc extinguishing chamber, operating mechanism, lug terminals, plastic insulating housing.

LED indicators

No onboard LED indicators. Status judged by handle position and trip indicator window.

Hardware self‑diagnosis

Check trip indicator, inspect contact heating, measure insulation resistance, verify terminal tightness.

Programming software

No configuration software, fixed thermal‑magnetic trip characteristics.

Electrical & Process Parameters

Model:HDM3M150L Brand:Siemens Device type:3‑Pole Molded Case Circuit Breaker Rated current:150A Breaking capacity:65kA Trip type:Thermal‑magnetic Function:Overload and short‑circuit protection for power distribution circuit

Mechanical & Structure

Mounting:Cabinet panel mounting Protection class:IP20 (front) Housing:Plastic insulated housing

Environmental

Operating temperature:-20℃ ~ +60℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:CE, UL, IEC60947‑2 compliant Status: Siemens original VL series MCCB

Installation

Install inside distribution cabinet, connect incoming and outgoing cables via lug terminals. Confirm rated current matches load, close cabinet door after wiring inspection.

Interface

Lug type main power input and output terminals, manual operation handle.

Diagnostic

Breaker trips repeatedly: overload or hidden short‑circuit. Terminal overheat: loose cable lug. Cannot close: trip latch locked by fault current.

Product Brief

Siemens HDM3M150L VL molded case circuit breaker, provides overload and short‑circuit protection for low‑voltage power distribution circuits.