1SDH002031A1002 ECN000092998 Rev. B
SACE Tmax XT2
– XT4 | 66
21 - Motor Protections
List
The Motor Protection package, available by default and only for Ekip M-Touch, includes the
protections:
Name
Type of protection
Page
R JAM
rotor blockage (after startup)
R STALL
rotor blockage (always active)
UC
Undercurrent
U
Phase loss
PTC
over temperature
Motor Protections comply with the IEC 60947-4-1 standard and related annex 2.
Trip class and
parameters
The trip class cited in the IEC 60947-4-1 standard is available in the Trip unit with
Motor Class
parameter (page 115), and its value determines:
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
)
Motor Class
t1 (s)
Motor start-up (s)
tmem res (min)
5E
12
3
5
10E
22
5
10
20E
45
10
20
Figure 24
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
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
=
40 A
,
Threshold I1
=
0.8 In
(
32
A
);
Threshold Ij
=
2.5 Ir
(
2.5 x 32 A =
80 A
)
Summary of Contents for SACE Tmax XT2
Page 84: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 84 L curve Ekip M Touch S curve t k I2 ...
Page 86: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 86 G curve t k I2 G curve t k ...
Page 87: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 87 IU curve UV curve UV2 curve ...
Page 88: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 88 OV curve OV2 curve VU curve ...
Page 89: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 89 S V curve S2 V curve RV curve ...
Page 90: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 90 UF curve UF2 curve OF curve OF2 curve ...
Page 91: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 91 RP curve D curve ...
Page 92: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 92 OQ curve OP curve ...
Page 93: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 93 UP curve RQ curve ...
Page 94: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 94 ROCOF curve R JAM curve R STALL ...
Page 95: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 95 UC curve ...
