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3RB20 36, 3RB21 33, size S2 with straight-through transformer
45
55
5
Ø
15
Ø
3RB20 46, 3RB21 43, size S3 with straight-through transformer
60
5
70
Ø
■
Schematics
3RB20 16
1 L 1
3 L 2 5 L 3
2 T 1
4 T 2 6 T 3
3RB20 26 to 3RB20 66
1 L 1
3 L 2 5 L 3
2 T 1
4 T 2 6 T 3
5
104
22
27
2
5
119
16
34
9 5
9 7
9 6
9 8
A 2 1 4 / 2 2
9 5
9 7
9 6
9 8
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
3RB20 56, 3RB21 53, size S6 with straight-through transformer
5
95
7,2
Ø
120
36
36
24
3RB21 13
1 L 1
3 L 2 5 L 3
2 T 1
4 T 2 6 T 3
3RB21 23 to 3RB21 63
1 L 1
3 L 2 5 L 3
2 T 1
4 T 2 6 T 3
NSB0_01517a
73
150
( – )
9 5
9 7
A 3
2 4 V
( + )
9 6
9 8
A 2 1 4 / 2 2
A 4
9 5
9 7
A 3
( – )
2 4 V
9 6
9 8
A 4
( + )
Siemens · 2011
27
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