Brochure

PowerPact H-, J-, and L-Frame Circuit Breakers
Circuit Breakers
28
02/2016 © 2011–2016 Schneider Electric
All Rights Reserved
Thermal-Magnetic Trip Units
Thermal-magnetic trip units require the current rating (I
n
) to be derated and the magnetic trip setting
(I
m
) to be increased.
Auxiliary Switch (OF) in 400 Hz Networks
Shunt Trip (MX) or Undervoltage Trip (MN) Voltage Release at 400 Hz and 440 V
For circuit breakers on 400 Hz systems, only 125 Vdc undervoltage trip (MN) or shunt trip (MX) releases
may be used. The release must be supplied by the 400 Hz system through a rectifier bridge (to be selected
from the table below) and an additional resistor with characteristics depending on the system voltage.
Table 15: Current Rating (In) and Magnetic Trip Setting (Im) Rerating
Circuit Breaker Maximum Setting Coefficient Max I
r
Setting at 400 Hz Magnetic I
m
Coefficient at 400 Hz
H-Frame, 150 A 0.9 135 1.6
J-Frame, 250 A 0.9 225 1.6
L-Frame, 400 A 0.8 320 1.6
L-Frame, 600 A 0.65 390 1.6
Table 16: Electrical Characteristics of Auxiliary Switches
Contact Standard Low Level
Utilization cat. (IEC 60947-5-1) AC12 AC15 AC12 AC15
Operational current
24 V 6 A 6 A 5 A 3 A
40 V 6 A 6 A 5 A 3 A
110 V 6 A 5 A 5 A 2.5 A
200/240 V 6 A 4 A 5 A 2 A
380/415 V 6 A 2 A 5 A 1.5 A
Table 17: Rectifier Bridges for MN or MX Releases
Voltage Rectifier Additional Resistor
220/240 V
Thomson 110 BHz or
General Instrument W06 or
Semikron SKB at 1.2/1.3
4.2 kȍ-5 W
380/240 V Semikron SKB at 1.2/1.3 10.7 kȍ-10 W