NHP TemBreak PRO P, User Manual

Page: 26 / 66

Protection Settings
Long Time Delay (LTD) protection
26
TemBreak PRO
P_BE-UM-001-EN V1.3.0
Adjusting I
r
(Current)
The LTD protection trip range is: 1.05...1.20 x I
r
according to standard AS/NZS IEC 60947.2.
The trip threshold tolerance I
r
for the long-time delay protection is +5% to +20%.
The I
r
trip threshold is adjusted using two I
r
dials on the front of the MCCB:
I
r1
– maximum scale adjustment
I
r2
– fine adjustment of the maximum scale in increments of 1%
The I
r
threshold is firstly set using the I
r1
dial to set the maximum current range, then, if necessary, from the I
r2
dial further adjustments in fine increments of
1% can be made from OFF to 0.92 x I
r1
dial. Refer to the Commissioning – LTD Adjustments (I
r
, t
r
) section for further information on using the I
r1
and I
r2
adjustment dials.
Rating (I
n
)
Dial position
1 2 3 4 5 6 7 8 9 10
40A
I
r1
max 16 I
r1
max 18 I
r1
max 20 I
r1
max 22 I
r1
max 25 I
r1
max 28 I
r1
max 32 I
r1
max 34 I
r1
max 37 I
r1
max 40
14.72...16 16.56...18 18.4...20 20.24...22 23...25 25.76...28 29.44...32 31.28...34 34.04-37 36.8-40
100A
I
r1
max 40 I
r1
max 45 I
r1
max 50 I
r1
max 57 I
r1
max 63 I
r1
max 72 I
r1
max 80 I
r1
max 87 I
r1
max 93 I
r1
max 100
36.8...40 41.4...45 46...50 52.44...57 57.96...63 66.24...72 73.6...80 80.04...87 85.56-93 92-100
160A
I
r1
max 63 I
r1
max 70 I
r1
max 80 I
r1
max 90 I
r1
max 100 I
r1
max 110 I
r1
max 125 I
r1
max 135 I
r1
max 150 I
r1
max 160
58...63 64.4...70 73.6...80 82.8...90 92...100 101.2...110 115...125 124.2...135 138-150 147.2-160
250A
I
r1
max 100 I
r1
max 110 I
r1
max 125 I
r1
max 140 I
r1
max 160 I
r1
max 180 I
r1
max 200 I
r1
max 225 I
r1
max 250
92...100 101.2...110 115...125 128.8...140 147.2...160 165.6...180 184...200 207...225 230-250
400A
I
r1
max 160 I
r1
max 180 I
r1
max 200 I
r1
max 225 I
r1
max 250 I
r1
max 300 I
r1
max 350 I
r1
max 370 I
r1
max 400
147.2...160 165.6...180 184...200 207...225 230...250 276...300 322...350 340.4...370 368-400
630A
I
r1
max 250 I
r1
max 300 I
r1
max 350 I
r1
max 370 I
r1
max 400 I
r1
max 500 I
r1
max 600 I
r1
max 630
230...250 276...300 322...350 340.4...370 368...400 460...500 552...600 579.6...630
I
r1
max scale setting (A)
I
r2
fine adjustment range (A)
WARNING : Setting I
r2
to OFF will disable both LTD and STD protection modes; therefore, the MCCB will provide
instantaneous protection only.