Markari Electric

Application:<br />
MM3 series moulded case circuit breaker (hereinafter called MM3 MCCB) is applicable circuit of AC 50Hz/60Hz, rated insulation voltage 660V, rated operating voltage up to 250V (DC). The rated operating current is 12.5A—1250A, for distribute energy of electricity and infrequent making and breaking circuit, and infrequent starting of squirrel cage motor (rated operating current up to 400A) at normal condition with the function of the protection against overload and short circuit and under voltage.<br />
Characteristics<br />
Internal accessory: shunt release, under-voltage release, auxiliary contact, alarm contact.<br />
External accessory: motor control mechanism, rotation handle operated mechanism<br />
Connection mode: front panel connection, back panel connection, plug-in connection<br />
Mounting mode: vertical (upright), horizontal (transverse)<br />
Breaking capacity: E for basic type, S for standard type, M for higher type, H for highest type.<br />
Arcing distance: short arcing, zero arcing<br />
Appearance: small volume, big current and beautiful shape, white outside, and bright color<br />
Frame current: 125.160, 250. 400. 630. 800. 1250,1600<br />
Current: 12.5,16,20,25,32,40,50,63,80,100,125,160,180,200,225,250,315,350,400,500,630,700,800,1000,1250,1600A<br />
Number of poles: 2. 3. 4 poles<br />
Standards: comply with IEC 947-2 GB14048.2<br />
Classification:


Mounting type: vertical and horizontal mounting
According to usage: distribution and motor protection type
According to the connection mode: front panel connection, back panel connection, plug-in connection.
According to the operating mode: for direct handle operating, for external rotary handle operating, for motor operator operating;
According to the overload release type: magnetic release (only instantaneous), thermodynamic magnetic type (dual)
According to the number of poles: three, four poles.


Type A: no overload release on N pole, which is making all the time; not closing and opening with the other three poles.<br />
Type B: no overload release on N pole, which is closing and opening with the other three poles.<br />
Type C: with overload release on N pole, which is closing and opening with the other three poles.<br />
Type D: with overload release on N pole, which is making all the time; not closing and opening with the other three poles.