T3N250 TMD250/2500 FF 3P_ABB_PRODUCT_吉林易择科技技术发展有限公司

Technical Parameters Parameter Specification Product type Molded Case Circuit Breaker (MCCB) Product series ABB SACE Tmax XT3N Poles 3 poles Terminal type Fixed front terminals (FF) Trip unit type TMD (Thermal‑magnetic) Adjustable instantaneous (short‑circuit) setting 250 A to 2500 A Rated uninterrupted (frame) current 250 A Rated operational voltage (Ue) Up to 690 V AC / 500 V DC Rated insulation voltage (Ui) 800 V AC Rated impulse withstand voltage (Uimp) 8 kV Rated service short‑circuit breaking capacity (Ics) e.g., 37.5 kA @ 230 V AC, 27 kA @ 380–415 V AC (typical IEC values) Rated ultimate short‑circuit breaking capacity (Icu) Higher values depending on system voltage and configuration Protection functions Overload protection, short‑circuit protection Standards compliance IEC 60947‑2 (low‑voltage circuit breakers) Mechanical durability ~25,000 operations Electrical durability ~8,000 operations at rated load Mounting Fixed panel installation Typical applications Industrial and commercial power distribution, feeder protection, switchboards

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DESCRIBE

The ABB XT3N 250 TMD 250‑2500 3P FF is a three‑pole molded case circuit breaker designed for low‑voltage power distribution and reliable protection against overloads and short circuits in industrial and commercial electrical installations. It is equipped with a TMD thermal‑magnetic release unit that allows adjustable instantaneous trip settings from 250 A up to 2500 A, offering flexible coordination and protection. The breaker has fixed front terminals (FF) for straightforward installation in switchboards, motor control centers, and panels.

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