User Manual

Accessories
14.2 Accessories for 3UG4 monitoring relays
3UG4 / 3RR2 monitoring relays
320 Manual, 02/2013, NEB927043002000/RS-AA/002
14.2.4 Summation current transformer for the 3UG4624 monitoring relay
Description
The 3UL22 summation current transformers acquire residual current in machines and plants.
Together with the 3UG4624 residual current monitoring relay or the motor management and
control unit SIMOCODE 3UF, residual current monitoring and ground-fault monitoring are
possible. The 3UL22 summation current transformer is available in three sizes with a
bushing opening of ∅ 40 mm, ∅ 65 mm and ∅ 120 mm.
a
1
a
6
a
4
a
5
a
2
a
3
b
5
b
1
b
2
b
3
b
4
c
1
c
2
c
3
A2
Z2Z1
Z3
Figure 14-6 3UL22 summation current transformers
Type a
1
a
2
a
3
a
4
a
5
a
6
b
1
b
2
b
3
b
4
b
5
c
1
c
2
c
3
3UL2201 100 75 10 15 for
M4
80 85 72,5 42,5 7,5 40 65 50 40
3UL2202 125 95 10 15 for
M4
100 110 97,5 55 7,5 65 70 60 45
3UL2203 200 165 20 20 for
M4
170 200 100 100 10 120 85 70 55