NHP TemBreak PRO, User Manual

Page: 29 / 105

Protection Settings
29
TemBreak PRO
B_BE-UM-001-EN
– V1.1.0
Long Time Delay Protection (LTD)
The Long Time Delay protection protects against current overloads or surges in power distribution or motor control applications.
Long Time Delay protection is an inverse-time protection which includes a thermal image function.
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
threshold is set using the I
R
adjustment dial in step increments.
I
r
settings (A)
Rating (I
n
)
I
R
Dial position
1 2 3 4 5 6 7 8 9 10
40A 16 20 25 32 36 38 40
125A 50 62 78 100 112 118 125
160A 64 80 100 128 144 152 160
250A 100 125 157 200 225 237 250
400A 160 200 252 320 340 360 400
630A 250 315 395 440 470 505 535 565 600 630
800A 320 400 505 560 600 640 680 720 760 800
1000A 400 500 630 700 750 800 850 900 950 1000
1250A 500 630 790 875 940 1000 1060 1125 1190 1250
1600A 640 800 1000 1120 1200 1280 1360 1440 1550 1600
Long Time Delay Settings Description
L
I
r
Long Time Delay protection threshold (current rating)
t
r
Long Time Delay (time delay)
Notice : For B250 / 400 models, the I
R
dial adjusts in increments of percentage (%) values of I
n
:
I
R
= 40, 50, 63, 80, 85, 90, 95, 100% x I
n