Motor Protections - ABB SACE Tmax XT2 User Manual

21 - Motor Protections

List The Motor Protection package, available by default and only for Ekip M-Touch, includes the
protections:
Name
R JAM
R STALL
UC
U
PTC
Motor Protections comply with the IEC 60947-4-1 standard and related annex 2.
The trip class cited in the IEC 60947-4-1 standard is available in the Trip unit with Motor Class
Trip class and
parameters parameter (page 115), and its value determines:



Motor Class
5E
10E
20E
Figure 24
Thresholds The thresholds of R Stall, R Jam and UC, unlike other current protections, do not refer to In but
rather to threshold I1 (L protection), called Ir in the respective configuration menus.
Example:
Rated size =
1SDH002031A1002 ECN000092998
Type of protection
rotor blockage (after startup)
rotor blockage (always active)
Undercurrent
Phase loss
over temperature
The trip time L (Time t1)
The start-up time (Motor start-up, calculated from when at least one phase exceeds the
fixed threshold of 0.25 x I1, during which some protections are inhibited
The reset time from thermal memory L following a TRIP (tmem res)
t1 (s)
12
22
45
NOTE 1: temporary shutdown during Motor Start-up is valid and active for the G, R
Jam and U protections, if enabled. If the protections are disabled, they remain off
before and after Motor start-up
40 A, Threshold I1 =
Rev. B
Motor start-up (s)
3
5
10
0.8 In ( 32 A); Threshold Ij =
Page
67
67
68
68
69
tmem res (min)
5
10
20
2.5 Ir ( 2.5 x 32 A = 80
SACE Tmax XT2 – XT4 | 66
A)