Connection
14
3ZX1012-0RB12-1AA1
En
glis
h
3.1.2
Current range 50 A to 820 A
Busbar connection: see graphics section, Fig.
II
3.2
Auxiliary conductor connection
Thermistor
sensor
A link (A) is in place when the device is delivered. This
link must be removed when the sensor is connected
(see illustration in Fig. V and VI).
3.3
Connection scheme
See graphics section of Fig.
IV
for circuit diagram,
showing
Automatic resets and remote resets.
Facility for connecting summation current transformer
3UL22 for external earth fault monitoring.
Finely stranded
conductor with
cable lug
[mm
2
]
Stranded con-
ductor with
cable lug
[mm
2
]
Connection
screws
Tightening
torque
[
Nm/lb.in
]
Tag
termination
[mm x mm]
3RB1253
35 to 95
50 to 120
M8
10 to 14 /
89 to 24
20 x 4
3RB1257
50 to 240
70 to 240
M10
14 to 24 /
124 to 210
30 x 6
3RB1262
50 to 240
185 to 240
M 10
(Connec-
tion to con-
tactor
3TF68)
14 to 24 /
124 to 210
40 x 8
M 12 (Con-
nection to
contactor
3TF69)
20 to 35 /
177 to 310
Solid
[mm
2
]
Finely stranded with/
without end sleeve
[mm
2
]
AWG
Connecting screws
[mm]
Tightening torque
[Nm/lb.in]
1x(0.5 to 4)
2x(0.5 to 2.5)
1x(0.5 to 2.5)
2x(0.5 to 1.5)
20 to 14 0.8x4...5.5
Pozidriv 2
0.8 to 1.2/
7 to 11
