Siemens 3RB12 Manual de usuario
Elektronisches Überlastrelais 3RB12
Solid-state overload relay
Relais de surcharge electronique
Relé electronico di sobrecarga
Relè elettronico di sovraccarica
Elektroniska överlastrelä
Betriebsanleitung
Instructions
Bestell-Nr./Order No.: 3ZX1012-0RB12-1AA1
Ausgabe/Edition 01/2003
GWA 4NEB 631 2282-30a
3RB1246-1P
3RB1246-1Q
3RB1246-1E
a10 15
b34 29
c29 24
d46 47
e48 ---
f 4 - - -
100
70
50
∅ 4,5
7, 2
Ic
85
127,5
5
100
Ib
Ia
b
e
a
fc
d
x
y
3ZX1012-0RB12-1AA1
3RB1253-
0F
3RB1257-
0K
3RB1262-
0L
a 120 145 230
b858585
c155 175 190
d 110 105 120
e405070
f∅ 7∅ 9∅ 11
g425270
h3748---
i 125 130 135
j414655
k203040
l 131 151 166
m 7,2 7,2 7,2
n 13 - - - - - -
o 145 160 175
idb
a
g
e
h
km
f
o
IIb
IIa
l
j
n
c
3ZX1012-0RB12-1AA1
III
M
1~
NSB00302a
L1 L2 L3
T1 T2 T3
L
N
3RB12
3ZX1012-0RB12-1AA1
H2
F2 F3 F4
A1
A2
K1E
135
642
135
L1 L2 L3
A2 A1
F5
F1
T1 T2 T3
642
U
W
V
CLASS
97
S1A
95
9896
K1E
S1E
Test/
Reset
K1 Overload
K2 Ground
Fault
Y1Y2
Z1
Z2
5, 10, 15, 20, 25, 30
Ground
Fault
H1 H3
05 07
06 08
Ready
Ground
Fault
Overload
C2
T2/
C1
Y1Y2
Automatic-
Reset
Remote-
Reset
ϑ
Y1
Y2
T1
ϑ
T2/
C1
3UL22
3 RB 12
⇑
⇑
K1E
L1
L2
L3
N
M
3 ~
IV
3RB12
3ZX1012-0RB12-1AA1
V3RB12..-...0
3RB12..-...2
25
30
40
50
60 70 80 90
100
5
10
15
20 25
30
Class
Test/
Reset
G/9401 3RB1246-1EM00
95 96 97 98 08070605
A1 Y1 Y2
A2 T1 T2/C1 C2
Overload
Gnd Fault
Ready
Reset
Gnd Fault
AC 220-240V J- -
3RB12
NC Overload NO NC Gnd Fault NO
A
AB
3ZX1012-0RB12-1AA1
25
30
40
50
60 70 80 90
100
5
10
15
20 25
30
Class
Test/
Reset
G/9401 3RB1246-1EM00
95 96 97 98 08070605
A1 Y1 Y2
A2 T1 T2/C1 C2
Overload
Gnd Fault
Ready
Reset
Gnd Fault
AC 220-240V ϑ↑ ↑
3RB12
NC NO NC NO
A
AB
Tripped
OVL-Warning
3RB12..-...1
3RB12..-...3
VI
3ZX1012-0RB12-1AA1
VIII
VII
x Ie
tA
1
2
5
10
20
50
12 580,7
1
2
5
10
20
50
100
120
s min
15
10
5
CLASS
CLASS 30
25
20
x Ie
1
2
5
10
20
50
12 580,7
1
2
5
10
20
50
100
120
s min
15
10
5
CLASS
tA
CLASS 30
25
20
3ZX1012-0RB12-1AA1
Device description
3ZX1012-0RB12-1AA1 11
English
Limited touch protection
Degree of protection in conformity with IEC 60529:
IP 20 for devices 70 mm
IP 00 for devices > 70 mm
Shock-proof in conformity with DIN VDE 0106, Part
100.
Installation and maintenance by technical personnel
only. Follow the operating instruction!
1 Device description
The 3RB12 electronic overload relay protects electrical
equipment, such as three-phase AC motors and trans-
formers, with three different protection mechanisms.
Overload
protection The 3RB12 compares the motor current actually
flowing with the set current and evaluates the values
in a microprocessor.
Thermistor
protection PTC thermistors in the motor windings sense the motor
temperature. If the thermistor responds, the relay trips.
Earth-fault
protection Versions with internal earth-fault detection are suitable
for service in three-wire systems.
Versions with earth-fault detection by means of an
external summation current transformer are suitable
for service in three-wire and four-wire systems.
WARNING
HAZARDOUS VOLTAGE
CAN CAUSE ELECTRICAL SHOCK
AND BURNS.
DISCONNECT POWER BEFORE PROCEEDING
WITH ANY WORK ON THIS EQUIPMENT.
Installation
12 3ZX1012-0RB12-1AA1
English
2Installation
For dimension drawings, see graphics section, Fig. I
and II.
Mounting position: any
Mounting of 70 mm devices:
■ Snap-on mounting on 35 mm mounting rail in con-
formity with EN 50 022 or
■ srew mounting by means of inserted lugs as
accessory (3RB1900-0B).
Mounting of the 120 mm, 145 mm und 230 mm
devices:
■ Crew mounting integrated in the casing.
■ In addition for 120 mm size:
Baseplate for snap-on fastening on 75 mm mount-
ing rail (3UF1900-0J) available as accessory.
3 Connection
3.1 Main conductor connection
3.1.1 Current range up to 100 A
■ Rated motor currents from 1.25 A to 100 A:
Insert the motor leads per phase through the open-
ings (x) in the unit (see graphics section, Fig. Ia).
■ Rated motor currents less than 1.25 A:
Insert the motor leads per phase through the open-
ings (x), take them back through the loop opening (y)
and insert them again through the openings (x). You
will produce two loops in this way (see graphics sec-
tion, Fig. Ia).
The following table lists the number of loops for the
various rated motor currents.
Tabla de contenidos
Otros manuales de Relé de Siemens
Siemens
Siemens 3RB2483-4AA1 Manual de usuario
Siemens
Siemens 3RU7116 Series Manual de usuario
Siemens
Siemens SIRIUS 3ZX1012-0RU11-1DA1 Manual de usuario
Siemens
Siemens POWERS RL 243 MP Manual del propietario
Siemens
Siemens SIRIUS 3RR24 Manual de usuario
Siemens
Siemens SIRIUS S00 Manual de usuario
Siemens
Siemens SIRIUS 3UG4583-1CW30 Manual de usuario
Siemens
Siemens 3TK2810-0 Manual de usuario
Siemens
Siemens 7SR45 Argus Guía de aplicación
Siemens
Siemens 3RP25 Manual de usuario
Siemens
Siemens Reyrolle 7SR46 Manual de usuario
Siemens
Siemens 7SG11 Argus Manual de usuario
Siemens
Siemens SIRIUS 3RU1.3 Manual de usuario
Siemens
Siemens Sirius 3UG4621 Manual de usuario
Siemens
Siemens 7UT51 Manual de usuario
Siemens
Siemens 7SR45 Argus Manual de usuario
Siemens
Siemens 3MU8400 Series Manual de usuario
Siemens
Siemens 7PV0 712 Series Manual de usuario
Siemens
Siemens LZS PT Series Manual de usuario
Siemens
Siemens SIPROTEC4 7SJ61 Manual de usuario
