36
Ground fault protection
(only for ref. MP4/TA)
Setting of current
(9 steps) Ig=0.2-0.3-0.4-0.5-0.6-
0.7-0.8-1 xIn - OFF
Setting of time delay
(@12xIg) (4+4 steps)
tg=0.1-0.2-0.5-1s (t=const)
tg=1-0.5-0.2-0.1s (I
2
t=const)
Overload protection
(Long Time Protection)
Setting of current (2x6 steps)
Ir=0,4÷1 x In
With 2 switches
(0,4÷0,9, steps of 0,1
0,0÷0,1, steps of 0,02)
Example:
Ir = 0.4+0.06
= 0.46 In
Setting of time delay (@6Ir)
(4+4 steps)
tr=5-10-20-30s (MEM ON)
tr= 30-20-10-5s (MEM OFF)
"MEM OFF" =
thermal memory off
"MEM ON" =
thermal memory on
Short Time Protection
Setting of current (9 steps)
Isd=1.5-2-2.5-3-4-5-6-8-10xIr
* Fixed instantaneous
override - Isf
t
I
t=const
I²t=const
t
I
t
I
t
I
*
*
*
If Ii<Isd, then istantaneous
setting prevails against the
magnetic one.
Summary of Contents for Megabreak MP4 Series
Page 2: ...2 Protection unit MP4 Megabreak IT EN ITALIANO 3 ENGLISH 33 ...
Page 32: ...32 ...
Page 50: ...50 To come back to the upper level of menu push C To scroll up push 49 ...
Page 52: ...52 To come back to the upper level of menu push C To scroll up push Overtemp 51 ...
Page 54: ...54 To come back to the upper level of menu push C To scroll up push In Absent 53 55 ...
Page 58: ...58 To come back to the upper level of menu push C To scroll up push 2 7 X ...
Page 62: ...62 ...
Page 63: ...Protection unit MP4 Megabreak Installation manual 63 ...
