Technical data
11.3 3RU21 thermal overload relays
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
122 Manual, 09/2014, A5E03656507420A/RS-AA/002
Rated operating current, short-circuit protection, tripping class, and active power loss
Technical data for current and short-circuit protection
Adjustable response current of
the current-dependent overload
release
Design of the fuse
link for short-circuit
protection of the main
circuit necessary
Trip class Active power loss
total typical
initial value final value
A A W
11 16 fuse gL/gG: 40 A CLASS 10 8
14 20 Fuse gL/gG: 50 A CLASS 10 8
18 25 fuse gL/gG: 63 A CLASS 10 8
22 32 Fuse gL/gG: 80 A CLASS 10 11
28 40 Fuse gL/gG: 80 A CLASS 10 11
36 45 fuse gL/gG: 100 A CLASS 10 11
40 50 fuse gL/gG: 100 A CLASS 10 11
47 57 fuse gL/gG: 100 A CLASS 10 11
54 65 fuse gL/gG: 125 A CLASS 10 12
62 73 fuse gL/gG: 160 A CLASS 10A 13
70 80 fuse gL/gG: 160 A CLASS 10A 14
Technical data for rated operating current UL/CSA
Full-load current (FLA) for 3-phase motor
at 480 V rated value at 600 V rated value
A A
16 16
20 20
25 25
32 32
40 40
45 45
50 50
57 57
65 65
73 73
80 80
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