33
32
Functions
Functions
(1) Thermomagnetic release TM
Circuit breakers with frame size from Ex9M1- Ex9M6 are all available with thermomagnetic release TM for AC or DC distribution protection, with
rated operating current of 16A-1600A.
The overload protection function is realized by bimetal operating mechanism;
The instantaneous short circuit protection function is realized by magnetic release;
The neutral pole protection of 4-pole circuit breaker (4P4T) is the same as other phase lines, and the contact can be disconnected at the same
time with other phase lines.
Distribution protection
Thermomagnetic
release TM
Ex9M1
Ex9M2
Ex9M3
Ex9M4
Ex9M5
Ex9M6
Pole number
1P
2P
3P
、
4P
1P
2P
、
3P
、
4P
3P
、
4P
3P
、
4P
3P
、
4P
3P
、
4P
Current
specification
16
、
20
、
25
、
32
、
40
、
50
、
63
、
80
、
100
、
125
、
160
16
、
20
、
25
、
32
、
40
、
50
、
63
、
80
、
100
125
、
160
125
、
160
、
180
、
200
、
225
、
250
125
160
、
180
、
200
、
225
、
250
250
、
315
、
350
、
400
、
500
400
、
500
、
630
630
、
700
、
800
800
、
1000
、
1250
、
1600
Overload protection
Current setting
(A) I
r
=I
n
х
1.0 not
adjustable
0.7-0.8-0.9-1.0
1.0 not
adjustable
0.7-0.8-0.9-1.0
0.8-0.9-
1.0
Precision
±20%
Instantaneous short circuit protection
Current setting
(A) I
i
=I
n
х
10
5-6-7-8-9-
10
10
7-8-9-10-
11-12
5-6-7-8-9-10
Precision
±20%
N
极保护
Current setting
(A) I
iN
=I
n
х
/
10
/
Pole of the same phase
Precision
±20%
Electronic release (SU20L)
Ex9M2
Ex9M3
Ex9M4
Ex9M5
Ex9M6
Overload protection
Current setting (A)I
r
=I
n
╳
0.4-0.5-0.6-0.7-0.8-0.9-0.95-1.0
6I
r
release time T
r
(s)
3-6-12-18
，
Precision ±10%
Short time delay short circuit protection
Current setting (A)I
sd
=I
r
╳
1.5-2-3-4-6-8-10
，
can be set to OFF
，
Precision±15%
Release timeT
sd
(s)
0.1-0.2-0.3-0.4
，
Precision ±20% or ±40ms (which is bigger)
Instantaneous short circuit protection
Current setting (A)I
i
=I
n
╳
2-3-4-6-8-10-12
，
can be set to OFF, precision ±15%
Maximum release time (ms)
60
N pole protection
Current setting
I
rN
=(0.5,1)
╳
I
n
；
I
sdN
=(1.5-2-3-4-6-8-10)I
rN
；
I
iN
=(2-3-4-6-8-10-12)I
rN
Release time
Same as phase line protection
(2) Basic type electronic release SU20L
Circuit breakers with frame size from Ex9M2- Ex9M6 are all available with basic type electronic release SU20L for AC distribution protection, with
rated operating current of 32A-1600A.
●
High release precision, reliable operation, free from the impact of ambient temperature
●
Operating ambient temperature: -35°C~+70°C
The basic type electronic release can provide 3-step protections (LSI):
Long time delay overload protection L
This is an inverse time limit protection. There are 8 stages of current setting available (I
r
= 0.4-0.5-0.6-0.7-0.8-0.9-0.95-1.0I
n
), and 4 stages of
overload protection release time available (Tr= 3-6-12-18s).
Short time delay short circuit protection S
There are 7 stages of current setting available (I
sd
= 1.5-2-3-4-6-8-10I
r
), and 4 stages of short time delay short circuit protection release time
(T
sd
= 0.1-0.2-0.3-0.4s). This function can be used with downstream circuit breaker for selection protection. This function can also be set to OFF.
Instantaneous short circuit protection I
There are 7 stages of instantaneous short circuit current setting available (Ii= 2-3-4-6-8-10-12I
n
). This function can also be set to OFF.
Neutral pole protection
Neutral pole protection current I
rN
=(0.5,1)I
n
, I
sdN
=(1.5-2-3-4-6-8-10)I
rN
, I
iN
=(2-3-4-6-8-10-12)I
rN
, the release time is the same as phase line protection.
