AIR CIRCUIT BREAKERS - Electrical and Electronics Division

2
2/23
TECHNICAL DATA - DM
Type Designation DM 16 DM 100 DM 160 DM 250 DM 400
Rated Uninterrupted current
at 40o C. - Ith (AC/DC) A 16 70 160 250 400
Rated impulse withstand voltage - Uimp kV 8 8 8 8 8
Rated operational voltage - Ue V 415 415 415 415 415
�requency Hz 50/60 50/60 50/60 50/60 50/60
Rated insulation voltage - Ui V 690 690 690 690 690
Operating Temperature °C -5 to +55 -5 to +55 -5 to +55 -5 to +55 -5 to +55
Overvoltage category / pollution degree III/3 III/3 III/3 III/3 III/3
Rated Short-circuit making capacity - Icm kA 105 105 105 105 105
Rated ultimate S.C. breaking capacity - Icu
at 660V ac kA 10 10 10 10 10
at 550V ac kA 25 25 25 25 25
at 500V ac kA 35 35 35 35 35
at 415V ac kA 50 50 50 50 50
at 380V ac kA 50 50 50 50 50
at 240V ac kA 85 85 85 85 85
Rated Service S.C.
breaking capacity - Ics at 415V ac kA 100% 100% 100% 100% 100%
Utilisation category A A A A A
Mechanical life
Electrical life
Release Type Magnetic Magnetic Magnetic Magnetic Magnetic
Short Circuit release setting (+/- 20%) 12*In 12*In 12*In 12*In 12*In
Weight kg 1 1.65 4.8 5.5 5.5
Terminal capacity Cables mm 2 10 50 185 300 300
Accessories
As per standard IS 13947-2 / IEC 60947-2
Links mm - 16 36 40 40
Auxiliary contacts 1 NO + 1 NC 1 NO + 1 NC 1 NO + 1 NC 2 NO + 2 NC 2 NO + 2 NC
Shunt release y y y y y
Under voltage release – y y y y
Trip alarm contacts y y y y y
Rotary operating mechanism y y y y y