SIEMENS
7/111
Siemens IC 10 · 2017
* You can order this quantity or a multiple thereof.
Illustrations are approximate.
Overload Relays
SIRIUS 3RB2 Electronic Overload Relays
3RB20, 3RB21 for standard applications
7
3RB21 electronic overload relays for mounting onto contactors and stand-alone installation, CLASS 5E, 10E, 20E and 30E
adjustable
Features and technical specifications:
•
Connection methods
- Size S6
Main circuit: With busbar connection or as straight-through
transformer,
Auxiliary circuit: Either screw or spring-type terminals
- Sizes S10/S12:
Main circuit: With busbar connection,
Auxiliary circuit: Either screw or spring-type terminals
•
Overload protection, phase failure protection and asymmetry
protection
•
Internal ground-fault detection (activatable)
•
Internal power supply
•
Auxiliary contacts 1 NO + 1 NC
•
Manual and automatic RESET
•
Electrical remote RESET integrated
•
Switch position indicator
•
TEST function and self-monitoring
PU (UNIT, SET, M) = 1
PS*
= 1 unit
PG
= 41G
1)
Guide value for 4-pole standard motors at 50 Hz 400 V AC. The actual
starting and rated data of the motor to be protected must be considered
when selecting the units.
2)
Maximum protection by fuse only for overload relays, type of
coordination "2". For fuse values in connection with contactors,
see Configuration Manual
.
3)
For 3TF68/3TF69 contactors, direct mounting is not possible.
Size contactor
Rated power for
three-phase motors,
rated value
1)
Current setting value
of the inverse-time
delayed overload
release
Short-circuit
protection with fuse,
type of coordina-
tion "2", operational
class gG
2)
SD
Screw terminals
(on auxiliary current
side)
SD
Spring-type
terminals
(on auxiliary current
side)
Article No.
Price
per PU
Article No.
Price
per PU
kW
A
A
d
d
Size S6
Devices with busbar connection
for mounting onto contactor and stand-alone installation
S6
22 ... 90
50 … 200
315
}
3RB2153-4FC2
}
3RB2153-4FF2
Devices with straight-through transformer
for mounting onto contactor and stand-alone installation
For mounting
onto S6 con-
tactors with
box terminals
22 ... 90
}
3RB2153-4FW2
}
3RB2153-4FX2
Size S10/S12
2)
Devices with busbar connection
for mounting onto contactor and stand-alone installation
S10/S12
and size 14
(3TF68/
3TF69)
3)
22 ... 110
55 … 250
400
}
3RB2163-4GC2
}
3RB2163-4GF2
90 ... 450
160 … 630
800
}
3RB2163-4MC2
}
3RB2163-4MF2
3RB2153-4FX2
3RB2163-4MC2
© Siemens AG 2016