3RU11, 3RB10, and 3RB12 overload relays
SIRIUS System Manual
4-6
GWA 4NEB 430 0999-02b
4.2.2 General device description
The 3RU11 and 3RB10 overload relays are electrically and mechanically com-
patible with the 3RT10 contactors and 3RW30/31 soft starters in the corre-
sponding frame size.
Frame sizes
The 3RU11 thermal overload relays and the 3RB10 electronic overload relays
are available in 4 frame sizes:
• Frame size S00: width 45 mm; up to 12 A
• Frame size S0: width 45 mm; up to 25 A
• Frame size S2: width 55 mm; up to 50 A
• Frame size S3: width 70 mm; up to 100 A
The 3RB12 electronic overload relay is available with the following dimen-
sions:
• 3RB12 46: width 70 mm; up to 100 A
• 3RB12 53: width 120 mm; up to 205 A
• 3RB12 57: width 145 mm; up to 500 A
• 3RB12 62: width 230 mm; up to 820 A
3RU11
S00 S0 S2
Figure 4-1: 3RU11 overload relays (frame sizes S00 to S2)
S3
Figure 4-2: 3RU11 overload relay (frame size S3)
3RB10
The construction of the 3RB10 is the same as that of the 3RU11.
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