Moulded-case Circuit Breaker-FTM2


Thermomagnetic trip units, for direct and alternating current network protection, using the physical properties of a bimetal and an electromagnet to detect the overloads and short-circuits; Electronic trip units, for alternating current network protection. Releases with microprocessor technology obtain protection functions that make the operations extremely reliable and accurate. The power required for operating them correctly is supplied straight from the current sensors of the releases. This ensures that they trip even in single-phase conditions and on a level with the minimum setting.

Technical data

Product illustration

Tripping characteristic

Exterior and dimensions

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Frame size 400 800
Model FTM2L(Z)-400L FTM2L(Z)-400H FTM2L(Z)-800L FTM2L(Z)-800H
Rated current (A) FTM2L 250,315,350,400 160,180,200,225,250
Number of poles 3-Poles,4-Poles
Rated insulation voltage(V) 690
Rated impulse withstand voltage Uimp(KV)
Rated frequency 50/60Hz
Ultimate short-circuit capacity Icu (KA) 50 70 50 70
Service short-circuit capacity Ics (KA) 50 50 50 50
Electrical life: 3,500
Mechanical life: 13,000
Arcing distance(mm) Zero
Ambient temperature (°C) -5°C ~ +40°C
Altitude (m) ≦2000m
When the ambient air temperature is +40℃, the relative humidity of the air shall not be higher than 50%;
a higher relative humidity is allowed at a lower temperature; for the wettest month,
the maximum relative humidity averaged shall be 90% while the lowest temperature aeraged in that month
+25℃,and the condensation produced due to temperature change shall be taken into consideration,
Atomospheric conditions
Pollution degree
Connection Front connection  plate,rear connection plate,plug-in rear connection plate
Dimensions L 257 275
W 3-Pole:140   4-Pole:184 3-Pole:140  4-Pole:184
H1 95 97.5
H 153 153

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