Overload Relays ■ General data

© Siemens AG 2007
Overload Relays
General data
■ Overview
Features
Benefits
3RU11
3RB20/3RB21
3RB22/3RB23
S00 ... S12
S00 ... S12
0.1 ... 630 A
0.3 ... 630 A
( ... 820 A)1)
General data
Sizes
• Are coordinated with the dimensions, connections S00 ... S3
and technical characteristics of the other devices
in the SIRIUS modular system (contactors, soft
starters, ...)
• Permit the mounting of slim and compact load
feeders in widths of 45 mm (S00), 45 mm (S0),
55 mm (S2), 70 mm (S3), 120 mm (S6) and
145 mm (S10/S12)
Seamless current range
• Allows easy and consistent configuration with one 0.11 ... 100 A
series of overload relays (for small to large loads)
• Simplify configuration
Protection functions
• Provides optimum inverse-time delayed protection
of loads against excessive temperature rises due
to overload
✔
✔
✔
Tripping in the event of phase
unbalance
• Provides optimum inverse-time delayed protection
of loads against excessive temperature rises due
to phase unbalance
(✔)
✔
✔
Tripping in the event of phase failure
• Minimizes heating of induction motors during
phase failure
✔
✔
✔
Protection of single-phase loads
• Enables the protection of single-phase loads
✔
--
✔
Tripping in the event of overheating
• Provides optimum temperature-dependent protection of loads against excessive temperature rises, e.g. for stator-critical motors or in the event of
insufficient coolant flow, contamination of the motor surface or for long starting or braking operations
--2)
--2)
✔
--
✔
(only 3RB21)
✔
✔
✔
✔
✔
(by means of separate module)
✔
(only 3RB21 with
24 V DC)
✔
by
integrated thermistor motor
protection function
5
Tripping in the event of overload
• Eliminates the need for additional special
equipment
• Saves space in the control cabinet
• Reduces wiring outlay and costs
Tripping in the event of a ground fault • Provides optimum protection of loads against
high-resistance short-circuits or ground faults due
by
to moisture, condensed water, damage to the insulation material, etc.
internal ground fault detection
• Eliminates the need for additional special
(activatable)
equipment.
• Saves space in the control cabinet
• Reduces wiring outlay and costs
Features
RESET function
• Allows manual or automatic resetting of the relay
Remote RESET function
• Allows the remote resetting of the relay
TEST function for auxiliary contacts
• Allows easy checking of the function and wiring
✔
✔
✔
TEST function for electronics
• Allows checking of the electronics
--
✔
✔
Status display
• Displays the current operating status
✔
✔
✔
Large current adjustment button
• Makes it easier to set the relay exactly to the
correct current value
✔
✔
✔
Integrated auxiliary contacts
(1 NO + 1 NC)
• Allows the load to be switched off if necessary
• Can be used to output signals
✔
✔
✔
(2 ×)
1)
Motor currents up to 820 A can be recorded and evaluated by a current
measuring module, e.g. 3RB29 06-2BG1 (0.3 ... 3 A) , in combination with
a 3UF18 68-3GA00 (820 A / 1 A) series transformer.
2)
The SIRIUS 3RN thermistor motor protection devices can be used to
provide additional protection temperature-dependent protection.
Siemens LV 1 · 2007
5/31
© Siemens AG 2007
Overload Relays
General data
Features
Benefits
3RU11
3RB20/3RB21
3RB22/3RB23
Design of load feeders
Short-circuit strength up to 100 kA
• Provides optimum protection of the loads and opat 690 V
erating personnel in the event of short-circuits due
(in conjunction with the corresponding
to insulation faults or faulty switching operations
fuses or the corresponding motor starter
protector)
Electrical and mechanical matching
to 3RT1 contactors
• Simplifies configuration
✔
✔
✔
✔
✔
✔1)
--
✔
(S2 ... S6)
✔
(S00 ... S6)
✔
(S00)
--
--
✔
✔
✔
✔
✔
✔
(✔)
✔
✔
--
✔
(1:4)
✔
(1:10)
--
✔
(only 3RB21)
✔
• Reduces wiring outlay and costs
5
• Enables stand-alone installation as
well as space-saving direct mounting
Straight-through transformers for
main circuit2)
(in this case the cables are routed
through the feed-through openings of
the overload relay and connected
directly to the box terminals of the contactor)
• Reduces the contact resistance
(only one point of contact)
Spring-loaded terminal connection
system for main circuit2)
• Enables fast connections
• Saves wiring costs (easy, no need for tools,
and fast).
• Saves material costs
• Reduces installation costs
• Permits vibration-resistant connections
• Enables maintenance-free connections
Spring-loaded terminal connection
system for auxiliary circuits2)
• Enables fast connections
• Permits vibration-resistant connections
• Enables maintenance-free connections
Other features
Temperature compensation
• Allows the use of the relays at high temperatures
without derating
• Prevents premature tripping
• Allows compact installation of the control cabinet
without distance between the units/load feeders
• Simplifies configuration
• Enables space to be saved in the control cabinet
Very high long-term stability
• Provides safe protection for the loads even after
years of use in severe operating conditions
Wide setting ranges
• Reduce the number of variants
• Minimize the engineering outlay and costs
• Minimize storage overhead, storage costs, tied-up
capital
Trip class CLASS 5
• Enables solutions for very fast starting motors
requiring special protection (e.g. Ex motors)
Trip class > CLASS 10
• Enable heavy starting solutions
--
✔
✔
Low power loss
• Reduces power consumption and energy costs
(up 98 % less power is used than for thermal
overload relays).
--
✔
✔
• Minimizes temperature rises of the contactor and
control cabinet – in some cases this may eliminate
the need for control cabinet cooling.
• Direct mounting to contactor saves space, even
for high motor currents (i.e. no heat decoupling is
required).
1)
2)
Exception: up to size S3, only stand-alone installation is possible.
Alternatively available for screw terminals.
5/32
Siemens LV 1 · 2007
© Siemens AG 2007
Overload Relays
General data
Features
Benefits
3RU11
3RB20/3RB21
3RB22/3RB23
Other features
Internal power supply
• Eliminates the need for configuration and connecting an additional control circuit
Variable adjustment of the trip
classes
• Reduces the number of variants
Overload warning
• Indicates imminent tripping of the relay directly on
the device due to overload, phase unbalance or
phase failure
--1)
✔
--
--
✔
(only 3RB21)
✔
--
--
✔
--
--
✔
• Minimizes the configuring outlay and costs
(The required trip class can be adjusted • Minimizes storage overhead, storage costs, and
by means of a rotary switch depending
tied-up capital
on the current start-up condition.)
• Allows the imminent tripping of the relay to be
signaled
• Allows measures to be taken in time in the event of
continuous inverse-time delayed overloads
• Eliminates the need for an additional device
5
• Saves space in the control cabinet
• Reduces wiring outlay and costs
Analog output
• Allows the output of an analog output signal for actuating moving-coil instruments, feeding programmable logic controllers or transfer to bus systems
• Eliminates the need for an additional measuring
transformer and signal converter
• Saves space in the control cabinet
• Reduces wiring outlay and costs
1)
The SIRIUS 3RU11 thermal overload relays use a bimetal contactor and
therefore do not require a control supply voltage.
Siemens LV 1 · 2007
5/33
© Siemens AG 2007
Overload Relays
General data
Overload relays Current
measurement
Type
Type
Current
range
A
Contactors (type, size, rating in kW)
3RT10 1
3RT10 2
3RT10 3
3RT10 4
3RT10 5
3RT10 6
3RT10 7
S00
S0
S2
S3
S6
S10
S12
3/4/5.5
5.5/7.5/11 15/18.5/22 30/37/45
55/75/90
110/132/160 200/250
3TF68/69
Size 14
375/450
3RU11 thermal overload relays
3RU11 1
integrated
0.11 … 12
✔
--
--
--
--
--
--
--
3RU11 2
integrated
1.8 … 25
--
✔
--
--
--
--
--
--
3RU11 3
integrated
5.5 … 50
--
--
✔
--
--
--
--
--
3RU11 4
integrated
18 … 100
--
--
--
✔
--
--
--
--
3RB20/3RB211) solid-state overload relays
3RB2. 1
integrated
0.1 … 12
✔
--
--
--
--
--
--
--
3RB20 2
3RB21 2
integrated
integrated
3 … 25
1 … 25
---
✔
✔
---
---
---
---
---
---
3RB2. 3
integrated
6 … 50
--
--
✔
--
--
--
--
--
3RB2. 4
integrated
12.5 … 100
--
--
--
✔
--
--
--
--
3RB2. 5
integrated
50 ... 200
--
--
--
--
✔
--
--
--
3RB2. 6
integrated
55 ... 630
--
--
--
--
--
✔
✔
✔
3RB29 0
0.3 … 25
✔
✔
--
--
--
--
--
--
3RB29 0
10 ... 100
--
--
✔
✔
--
--
--
--
3RB22/3RB23 + 3RB29 5
20 … 200
--
--
--
--
✔
--
--
--
3RB29 6
63 ... 630
--
--
--
--
--
✔
✔
✔
3RB29 0 +
3UF18
630 ... 820
--
--
--
--
--
--
--
✔
5
3RB22/3RB231) solid-state overload relays
1)
When using the overload relays with trip class ≥ CLASS 20, see Technical
Specifications, Short-Circuit Protection with Fuses for Motor Feeders and
the configuring aid "Configuring SIRIUS Fuseless Load Feeders".
5/34
Siemens LV 1 · 2007
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
■ Overview
The 3RB20 and 3RB21 solid-state overload relays up to 630 A
with internal power supply have been designed for inverse-time
delayed protection of loads with normal and heavy starting (see
LV 1 T, Function) against excessive temperature rises due to
overload, phase unbalance or phase failure. An overload, phase
unbalance or phase failure result in an increase of the motor current beyond the set motor rated current. This current rise is detected by the current transformers integrated into the devices
and evaluated by corresponding solid-state circuits which then
output a pulse to the auxiliary contacts. The auxiliary contacts
then switch off the load by means of a contactor. The break time
depends on the ratio between the tripping current and set current Ie and is stored in the form of a long-term stable tripping
characteristic (see LV 1 T Characteristic Curves).
The "tripped" status is signaled by means of a switch position indicator (see LV 1 T, Function). Resetting takes place either manually or automatically after the recovery time has elapsed (see
LV 1 T, Function).
The devices are manufactured in accordance with environmental guidelines and contain environmentally friendly and reusable
materials. They comply with all important worldwide standards
and approvals.
■ Benefits
The most important features and benefits of the 3RB20/3RB21
solid-state overload relays are listed in the overview table (see
Overload Relays, General Data).
Siemens LV 1 · 2007
5/35
5
(1) Connection for mounting onto contactors:
Optimally adapted in electrical, mechanical and design terms to the
contactors and soft starters, these connecting pins can be used for direct mounting of the overload relays. Stand-alone installation is possible as an alternative (in some cases in conjunction with a stand-alone
installation module).
(2) Selector switch for manual/automatic RESET and RESET button:
With the slide switch you can choose between manual and automatic
RESET. A device set to manual RESET can be reset locally by pressing
the RESET button. On the 3RB21 a solid-state remote RESET is integrated.
(3) Switch position indicator and TEST function of the wiring:
Indicates a trip and enables the wiring test.
(4) Solid-state test (device test):
Enables a test of all important device components and functions.
(5) Motor current setting:
Setting the device to the motor rated current is easy with the large
rotary knob.
(6) Trip class setting/internal ground-fault detection (only 3RB21):
Using the rotary switch you can set the required trip class and activate
the internal ground-fault detection dependent on the start-up conditions.
(7) Connecting terminals (removable terminal block for auxiliary circuits):
The generously sized terminals permit connection of two conductors
with different cross-sections for the main and auxiliary circuits. The
auxiliary circuit can be connected with screw connection and alternatively with spring-type connection.
In addition to inverse-time delayed protection of loads against
excessive temperature rises due to overload, phase unbalance
and phase failure, the 3RB21 solid-state overload relays also allow internal ground-fault detection (not possible in conjunction
with wye-delta assemblies). This provides protection of loads
against high-resistance short-circuits due to damage to the insulation material, moisture, condensed water etc.
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
■ Application
"Increased safety" type of protection EEx e according to
ATEX directive 94/9/EC
Industries
The 3RB20/3RB21 solid-state overload relays are suitable for
customers from all industries who want to guarantee optimum inverse-time delayed protection of their electrical loads (e.g. motors) under normal and heavy starting conditions (CLASS 5 to
CLASS 30), minimize project completion times, inventories and
power consumption, and optimize plant availability and maintenance management.
Application
The 3RB20/3RB21 solid-state overload relays have been designed for the protection of induction motors in sinusoidal 50/60
Hz voltage networks. The relays are not suitable for the protection of single-phase AC or DC loads.
The 3RU11 thermal overload relay or the 3RB22/3RB23 solidstate overload relay can be used for single-phase AC loads. For
DC loads we recommend the 3RU11 thermal overload relay.
Ambient conditions
The devices are insensitive to external influences such as
shocks, corrosive environments, ageing and temperature fluctuation.
5
For the temperature range from –25 C to +60 °C, the
3RB20/3RB21 solid-state overload relays compensate the temperature according to IEC 60947-4-1.
For the 3RB20/3RB21 solid-state overload relays with the sizes
S6, S10 and S12, the upper set value of the setting range must
be reduced for ambient temperatures > 50 °C by a certain factor
(see tables below).
Type
Setting range
Derating factor for the upper set
value for stand-alone installation
at ambient temperature
+50 °C
+60 °C
3RB20 56/3RB21 56
50 ... 200 A
100 %
100 %
3RB20 66/3RB21 66
55 ... 250 A
100 %
100 %
3RB20 66/3RB21 66
160 ... 630 A
100 %
90 %
Type
Setting range
Derating factor for the upper set
value for mounting onto
contactor
at ambient temperature
+50 °C
+60 °C
3RB20 56/3RB21 56
50 ... 200 A
100 %
70 %
3RB20 66/3RB21 66
55 ... 250 A
100 %
70 %
3RB20 66/3RB21 66
160 ... 630 A
100 %
70 %
5/36
Siemens LV 1 · 2007
The 3RB20/3RB21 solid-state overload relays are suitable for the
overload protection of explosion-proof motors with "increased
safety" type of protection EEx e. The relays meet the requirements of EN 60079-7 (Electrical apparatus for potentially explosive atmospheres – Increased safety "e").
The basic safety and health requirements of ATEX directive
94/9/EC are fulfilled by compliance with
• EN 60947-1
• EN 60947-4-1
• EN 60947-5-1
• EN 60079-14
EU type test certificate for Group II, Category (2) G/D exists.
■ Accessories
The following accessories are available for the 3RB20/3RB21
solid-state overload relays:
• One terminal bracket each for the overload relays size S00
and S0 (sizes S2 to S12 can be installed as single units without
a terminal bracket)
• One mechanical remote RESET module for all sizes
• One cable release for resetting devices which are difficult to
access (for all sizes)
• One sealable cover for all sizes
• Box terminal blocks for sizes S6 and S10/S12
• Terminal covers for sizes S2 to S10/S12
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
■ Selection and ordering data
Conversion aid 3RB10 ––> 3RB20
Size
Previous type
Replacement type
3RB10
Setting range in A
3RB20
Setting range in A
3RB10 [email protected]
0.1 ... 0.4
3RB20 [email protected]
0.1 ... 0.4
3RB10 [email protected]
0.4 ... 1.6
3RB20 [email protected]
0.32 ... 1.25
3RB20 [email protected]
1 ... 4
3RB10 [email protected]
1.5 ... 6
3RB10 [email protected]
3
3RB20 [email protected]
3 ... 12
3RB10 [email protected]
0.1 ... 0.4
3RB10 [email protected]
0.4 ... 1.6
3RB10 [email protected]
1.5 ... 6
3RB10 [email protected]
3 ... 12
3RB20 [email protected]
3RB10 [email protected]
6 ... 25
3RB20 [email protected]
6 ... 25
3RB10 [email protected]
6 ... 25
3RB20 [email protected]
6 ... 25
3RB10 [email protected]
13 ... 50
3RB20 [email protected]
12.5 ... 50
3RB10 [email protected]
13 ... 50
3RB20 [email protected]
12.5 ... 50
3RB10 [email protected]
25 ... 100
3RB20 [email protected]
25 ... 100
S00
S0
S2
S3
S6
3RB10 [email protected]
50 ... 200
3RB10 [email protected]
55 ... 250
3RB10 [email protected]
200 ... 540
3RB10 [email protected]
300 ... 630
Use size S00
3RB20 [email protected]
3RB20 [email protected]
3 ... 12
50 ... 200
3RB20 [email protected]
55 ... 250
3RB20 [email protected]
160 ... 630
5
S10/S12
3RB10 [email protected]
... 12
CLASS 10
1
1
CLASS 20
2
2
Conversion aid 3RB10 ––> 3RB21
Size
Previous type
Replacement type
3RB10
Setting range in A
3RB21
Setting range in A
3RB10 [email protected]
0.1 ... 0.4
3RB21 13-4RB0
0.1 ... 0.4
3RB10 [email protected]
0.4 ... 1.6
3RB21 13-4NB0
0.32 ... 1.25
3RB21 13-4PB0
1 ... 4
3RB10 [email protected]
1.5 ... 6
3RB10 [email protected]
3
3RB21 13-4SB0
3 ... 12
3RB10 [email protected]
0.1 ... 0.4
3RB10 [email protected]
0.4 ... 1.6
3RB10 [email protected]
1.5 ... 6
3RB21 23-4PB0
1 ... 4
3RB10 [email protected]
3 ... 12
3RB21 23-4SB0
3 ... 12
3RB10 [email protected]
6 ... 25
3RB21 23-4QB0
6 ... 25
3RB10 [email protected]
6 ... 25
3RB21 33-4QB0
6 ... 25
3RB10 [email protected]
13 ... 50
3RB21 33-4UB0
12.5 ... 50
3RB10 [email protected]
13 ... 50
3RB21 43-4UB0
12.5 ... 50
3RB10 [email protected]
25 ... 100
3RB21 43-4EB0
25 ... 100
S00
S0
S2
S3
S6
S10/S12
3RB10 [email protected]
3RB10 [email protected]
... 12
50 ... 200
3RB10 [email protected]
55 ... 250
3RB10 [email protected]
200 ... 540
3RB10 [email protected]
300 ... 630
Use size S00
3RB21 53-4FW2
3RB21 53-4FC2
3RB21 63-4GC2
3RB21 63-4MC2
50 ... 200
55 ... 250
160 ... 630
Note:
CLASS 10
1
CLASS 20
2
CLASS 5, 10, 20 and 30
can be adjusted on the unit
Siemens LV 1 · 2007
5/37
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
3RB20 solid-state overload relays with screw terminals on auxiliary current side for direct mounting1)2)
and stand-alone installation2)3), CLASS 10
Features and technical specifications:
• Overload protection, phase failure protection and unbalance
protection
• Internal power supply
• Auxiliary contacts 1 NO + 1 NC
Size of
Rating
contactor for induction
4)
motor
Rated value5)
kW
• Manual and automatic RESET
• Switch position indicator
• TEST function and self-monitoring
Set current value
of the inversetime delayed
overload release
Short-circuit DT Screw terminals
protection
(on auxiliary current side)
with fuse,
type of coorOrder No.
Price
dination 2,
per PU
gL/gG operational class6)
A
A
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Size S001)
S00
0.04 … 0.09
0.1 … 0.4
1
}
3RB20 16-1RB0
1
1 unit
101
0.200
0.12 … 0.37
0.32 … 1.25
2
}
3RB20 16-1NB0
1
1 unit
101
0.200
0.55 … 1.5
1…4
10
}
3RB20 16-1PB0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
}
3RB20 16-1SB0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
}
3RB20 26-1SB0
1
1 unit
101
0.220
3 … 11
6 … 25
35
}
3RB20 26-1QB0
1
1 unit
101
0.220
3 … 11
6 … 25
63
0.360
3RB20 16-1RB0
Size S01)
5
S0
3RB20 26-1QB0
Size S21)3)7)
S2
7.5 … 22
12.5 … 50
80
}
3RB20 36-1QB0
1
1 unit
101
}
3RB20 36-1QW1
1
1 unit
101
0.230
}
3RB20 36-1UB0
1
1 unit
101
0.360
}
3RB20 36-1UW1
1
1 unit
101
0.230
3RB20 36-1UB0
Size S31)3)7)
S3
7.5 … 22
12.5 … 50
160
}
3RB20 46-1UB0
1
1 unit
101
0.560
11 … 45
25 … 100
315
}
3RB20 46-1EB0
1
1 unit
101
0.560
}
3RB20 46-1EW1
1
1 unit
101
0.450
}
3RB20 56-1FC2
1
1 unit
101
1.030
}
3RB20 56-1FW2
1
1 unit
101
0.690
3RB20 46-1EB0
Size S6 2)7)
S6 with
bar connection
22 … 90
50 … 200
315
S6 with
box terminals
3RB20 56-1FW2
Size S10/S122)
S10/S12
and size
14
(3TF68/
3TF69)
22 … 110
55 … 250
400
}
3RB20 66-1GC2
1
1 unit
101
1.820
90 … 450
160 … 630
800
}
3RB20 66-1MC2
1
1 unit
101
1.820
3RB20 66-1MC2
1)
The relays with an Order No. ending with "0" are designed for direct
mounting. With the matching terminal brackets (see Accessories) the sizes
S00 and S0 can also be installed as stand-alone units.
5)
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)
The relays with an Order No. ending with "2" are designed for direct
mounting and stand-alone installation. For 3TF68/3TF69 contactors, direct
mounting is not possible.
6)
Maximum fuse for overload relay, type of coordination 2. For fuse values in
conjunction with contactors, see Technical Specifications, Short-Circuit
Protection with Fuses for Motor Feeders.
3)
The relays with an Order No. ending with "1" are designed for stand-alone
installation.
Observe maximum rated operational current of the devices.
7)
The relays with an Order No. with "W" in penultimate position are
equipped with a straight-through transformer.
4)
* You can order this quantity or a multiple thereof.
5/38
Siemens LV 1 · 2007
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
3RB20 solid-state overload relays with spring-loaded terminals on auxiliary current side for direct mounting1)2)
and stand-alone installation2)3), CLASS 10
Features and technical specifications:
• Overload protection, phase failure protection and unbalance
protection
• Internal power supply
• Auxiliary contacts 1 NO + 1 NC
Size of
Rating
contactor for induction
4)
motor
Rated value5)
kW
• Manual and automatic RESET
• Switch position indicator
• TEST function and self-monitoring
Set current value
of the inversetime delayed
overload release
Short-circuit DT Spring-loaded terminals
protection
(on auxiliary current side)
with fuse,
type of coorOrder No.
Price
dination 2,
per PU
gL/gG operational class6)
A
A
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Size S001)
S00
0.04 … 0.09
0.1 … 0.4
1
A
3RB20 16-1RD0
1
1 unit
101
0.200
0.12 … 0.37
0.32 … 1.25
2
A
3RB20 16-1ND0
1
1 unit
101
0.200
0.55 … 1.5
1…4
10
A
3RB20 16-1PD0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
A
3RB20 16-1SD0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
A
3RB20 26-1SD0
1
1 unit
101
0.220
3 … 11
6 … 25
35
A
3RB20 26-1QD0
1
1 unit
101
0.220
3 … 11
6 … 25
63
0.360
3RB20 16-1RD0
Size S01)
5
S0
3RB20 26-1QD0
Size S21)3)7)
S2
7.5 … 22
12.5 … 50
80
A
3RB20 36-1QD0
1
1 unit
101
A
3RB20 36-1QX1
1
1 unit
101
0.230
A
3RB20 36-1UD0
1
1 unit
101
0.360
A
3RB20 36-1UX1
1
1 unit
101
0.230
3RB20 36-1UD0
Size S31)3)7)
S3
7.5 … 22
12.5 … 50
160
A
3RB20 46-1UD0
1
1 unit
101
0.560
11 … 45
25 … 100
315
A
3RB20 46-1ED0
1
1 unit
101
0.560
A
3RB20 46-1EX1
1
1 unit
101
0.450
A
3RB20 56-1FF2
1
1 unit
101
1.030
A
3RB20 56-1FX2
1
1 unit
101
0.690
3RB20 46-1ED0
Size S6 2)7)
S6 with
bar connection
22 … 90
50 … 200
315
S6 with
box terminals
3RB20 56-1FX2
Size S10/S122)
S10/S12
and size
14
(3TF68/
3TF69)
22 … 110
55 … 250
400
A
3RB20 66-1GF2
1
1 unit
101
1.820
90 … 450
160 … 630
800
A
3RB20 66-1MF2
1
1 unit
101
1.820
3RB20 66-1MF2
1)
The relays with an Order No. ending with "0" are designed for direct
mounting. With the matching terminal brackets (see Accessories) the sizes
S00 and S0 can also be installed as stand-alone units.
5)
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)
The relays with an Order No. ending with "2" are designed for direct
mounting and stand-alone installation. For 3TF68/3TF69 contactors, direct
mounting is not possible.
6)
Maximum fuse for overload relay, type of coordination 2. For fuse values in
conjunction with contactors, see Technical Specifications, Short-Circuit
Protection with Fuses for Motor Feeders.
3)
The relays with an Order No. ending with "1" are designed for stand-alone
installation.
Observe maximum rated operational current of the devices.
7)
The relays with an Order No. with "X" in penultimate position are equipped
with a straight-through transformer.
4)
* You can order this quantity or a multiple thereof.
Siemens LV 1 · 2007
5/39
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
3RB20 solid-state overload relays with screw terminals on auxiliary current side for direct mounting1)2)
and stand-alone installation2)3), CLASS 20
Features and technical specifications:
• Overload protection, phase failure protection and unbalance
protection
• Internal power supply
• Auxiliary contacts 1 NO + 1 NC
Size of
Rating
contactor for induction
4)
motor
Rated value5)
kW
• Manual and automatic RESET
• Switch position indicator
• TEST function and self-monitoring
Set current value
of the inversetime delayed
overload release
Short-circuit DT Screw terminals
protection
(on auxiliary current side)
with fuse,
type of coorOrder No.
Price
dination 2,
per PU
gL/gG operational class6)
A
A
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Size S001)
S00
0.04 … 0.09
0.1 … 0.4
1
}
3RB20 16-2RB0
1
1 unit
101
0.200
0.12 … 0.37
0.32 … 1.25
2
}
3RB20 16-2NB0
1
1 unit
101
0.200
0.55 … 1.5
1…4
10
}
3RB20 16-2PB0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
}
3RB20 16-2SB0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
}
3RB20 26-2SB0
1
1 unit
101
0.220
3 … 11
6 … 25
35
}
3RB20 26-2QB0
1
1 unit
101
0.220
3 … 11
6 … 25
63
0.360
3RB20 16-2RB0
Size S01)
5
S0
3RB20 26-2QB0
Size S21)3)7)
S2
7.5 … 22
12.5 … 50
80
}
3RB20 36-2QB0
1
1 unit
101
}
3RB20 36-2QW1
1
1 unit
101
0.230
}
3RB20 36-2UB0
1
1 unit
101
0.360
}
3RB20 36-2UW1
1
1 unit
101
0.230
3RB20 36-2UB0
Size S31)3)7)
S3
7.5 … 22
12.5 … 50
160
}
3RB20 46-2UB0
1
1 unit
101
0.560
11 … 45
25 … 100
315
}
3RB20 46-2EB0
1
1 unit
101
0.560
}
3RB20 46-2EW1
1
1 unit
101
0.450
}
3RB20 56-2FC2
1
1 unit
101
1.030
}
3RB20 56-2FW2
1
1 unit
101
0.690
3RB20 46-2EB0
Size S6 2)7)
S6 with
bar connection
22 … 90
50 … 200
315
S6 with
box terminals
3RB20 56-2FW2
Size S10/S122)
S10/S12
and size
14
(3TF68/
3TF69)
22 … 110
55 … 250
400
}
3RB20 66-2GC2
1
1 unit
101
1.820
90 … 450
160 … 630
800
}
3RB20 66-2MC2
1
1 unit
101
1.820
3RB20 66-2MC2
1)
The relays with an Order No. ending with "0" are designed for direct
mounting. With the matching terminal brackets (see Accessories) the sizes
S00 and S0 can also be installed as stand-alone units.
5)
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)
The relays with an Order No. ending with "2" are designed for direct
mounting and stand-alone installation. For 3TF68/3TF69 contactors, direct
mounting is not possible.
6)
Maximum fuse for overload relay, type of coordination 2. For fuse values in
conjunction with contactors, see Technical Specifications, Short-Circuit
Protection with Fuses for Motor Feeders.
3)
The relays with an Order No. ending with "1" are designed for stand-alone
installation.
Observe maximum rated operational current of the devices.
7)
The relays with an Order No. with "W" in penultimate position are
equipped with a straight-through transformer.
4)
* You can order this quantity or a multiple thereof.
5/40
Siemens LV 1 · 2007
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
3RB20 solid-state overload relays with spring-loaded terminals on auxiliary current side for direct mounting1)2)
and stand-alone installation2)3), CLASS 20
Features and technical specifications:
• Overload protection, phase failure protection and unbalance
protection
• Internal power supply
• Auxiliary contacts 1 NO + 1 NC
Size of
Rating
contactor for induction
4)
motor
Rated value5)
kW
• Manual and automatic RESET
• Switch position indicator
• TEST function and self-monitoring
Set current value
of the inversetime delayed
overload release
Short-circuit DT Spring-loaded terminals
protection
(on auxiliary current side)
with fuse,
type of coorOrder No.
Price
dination 2,
per PU
gL/gG operational class6)
A
A
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Size S001)
S00
0.04 … 0.09
0.1 … 0.4
1
A
3RB20 16-2RD0
1
1 unit
101
0.200
0.12 … 0.37
0.32 … 1.25
2
A
3RB20 16-2ND0
1
1 unit
101
0.200
0.55 … 1.5
1…4
10
A
3RB20 16-2PD0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
A
3RB20 16-2SD0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
A
3RB20 26-2SD0
1
1 unit
101
0.220
3 … 11
6 … 25
35
A
3RB20 26-2QD0
1
1 unit
101
0.220
3 … 11
6 … 25
63
0.360
3RB20 16-2RD0
Size S01)
5
S0
3RB20 26-2QD0
Size S21)3)7)
S2
7.5 … 22
12.5 … 50
80
A
3RB20 36-2QD0
1
1 unit
101
A
3RB20 36-2QX1
1
1 unit
101
0.230
A
3RB20 36-2UD0
1
1 unit
101
0.360
A
3RB20 36-2UX1
1
1 unit
101
0.230
3RB20 36-2UD0
Size S31)3)7)
S3
7.5 … 22
12.5 … 50
160
A
3RB20 46-2UD0
1
1 unit
101
0.560
11 … 45
25 … 100
315
A
3RB20 46-2ED0
1
1 unit
101
0.560
A
3RB20 46-2EX1
1
1 unit
101
0.450
A
3RB20 56-2FF2
1
1 unit
101
1.030
A
3RB20 56-2FX2
1
1 unit
101
0.690
3RB20 46-2ED0
Size S6 2)7)
S6 with
bar connection
3RB20 56-2FX2
22 … 90
50 … 200
315
S6 with
box terminals
Size S10/S122)
S10/S12
and size
14
(3TF68/
3TF69)
22 … 110
55 … 250
400
A
3RB20 66-2GF2
1
1 unit
101
1.820
90 … 450
160 … 630
800
A
3RB20 66-2MF2
1
1 unit
101
1.820
3RB20 66-2MF2
1)
2)
3)
4)
The relays with an Order No. ending with "0" are designed for direct
mounting. With the matching terminal brackets (see Accessories) the sizes
S00 and S0 can also be installed as stand-alone units.
The relays with an Order No. ending with "2" are designed for direct
mounting and stand-alone installation. For 3TF68/3TF69 contactors, direct
mounting is not possible.
The relays with an Order No. ending with "1" are designed for stand-alone
installation.
5)
6)
7)
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.
Maximum fuse for overload relay, type of coordination 2. For fuse values in
conjunction with contactors, see Technical Specifications, Short-Circuit
Protection with Fuses for Motor Feeders.
The relays with an Order No. with "X" in penultimate position are equipped
with a straight-through transformer.
Observe maximum rated operational current of the devices.
* You can order this quantity or a multiple thereof.
Siemens LV 1 · 2007
5/41
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
3RB21 solid-state overload relays with screw terminals on auxiliary current side for direct mounting1)2)
and stand-alone installation2)3), CLASS 5, 10, 20 and 30 adjustable
Features and technical specifications:
• Overload protection, phase failure protection and unbalance
protection
• Internal ground fault detection (activatable)
• Internal power supply
• Auxiliary contacts 1 NO + 1 NC
Size of
Rating for
contactor induction motor
4)
Rated value5)
kW
•
•
•
•
Manual and automatic RESET
Electrical remote RESET integrated
Switch position indicator
TEST function and self-monitoring
Set current value
of the inversetime delayed
overload release
Short-circuit DT Screw terminals
protection
(on auxiliary current side)
with fuse,
type of coorOrder No.
Price
dination 2,
per PU
gL/gG operational class6)
A
A
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Size S001)
S00
0.04 … 0.09
0.1 … 0.4
1
}
3RB21 13-4RB0
1
1 unit
101
0.200
0.12 … 0.37
0.32 … 1.25
2
}
3RB21 13-4NB0
1
1 unit
101
0.200
0.55 … 1.5
1…4
10
}
3RB21 13-4PB0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
}
3RB21 13-4SB0
1
1 unit
101
0.200
0.220
3RB21 13-4RB0
Size S01)
0.55 ... 1.5
1 ... 4
10
}
3RB21 23-4PB0
1
1 unit
101
1.1 … 5.5
3 … 12
20
}
3RB21 23-4SB0
1
1 unit
101
0.220
3 … 11
6 … 25
35
}
3RB21 23-4QB0
1
1 unit
101
0.220
3 … 11
6 … 25
35
0.360
5
S0
3RB21 23-4QB0
Size S21)3)7)
S2
7.5 … 22
12.5 … 50
100
}
3RB21 33-4QB0
1
1 unit
101
}
3RB21 33-4QW1
1
1 unit
101
0.230
}
3RB21 33-4UB0
1
1 unit
101
0.360
}
3RB21 33-4UW1
1
1 unit
101
0.230
3RB21 33-4UB0
Size S31)3)7)
S3
7.5 … 22
12.5 … 50
125
}
3RB21 43-4UB0
1
1 unit
101
0.560
11 … 45
25 … 100
200
}
3RB21 43-4EB0
1
1 unit
101
0.560
}
3RB21 43-4EW1
1
1 unit
101
0.450
}
3RB21 53-4FC2
1
1 unit
101
1.030
}
3RB21 53-4FW2
1
1 unit
101
0.690
3RB21 43-4EB0
Size S6 2)7)
S6 with
bar connection
22 … 90
50 … 200
355
S6 with
box terminals
3RB21 53-4FC2
Size S10/S122)
S10/S12
and size
14
(3TF68/
3TF69)
22 … 110
55 … 250
500
}
3RB21 63-4GC2
1
1 unit
101
1.820
90 … 450
160 … 630
800
}
3RB21 63-4MC2
1
1 unit
101
1.820
3RB21 63-4MC2
1)
The relays with an Order No. ending with "0" are designed for direct
mounting. With the matching terminal brackets (see Accessories) the sizes
S00 and S0 can also be installed as stand-alone units.
5)
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)
The relays with an Order No. ending with "2" are designed for direct
mounting and stand-alone installation. For 3TF68/3TF69 contactors, direct
mounting is not possible.
6)
Maximum fuse for overload relay, type of coordination 2. For fuse values in
conjunction with contactors, see Technical Specifications, Short-Circuit
Protection with Fuses for Motor Feeders.
3)
The relays with an Order No. ending with "1" are designed for stand-alone
installation.
7)
The relays with an Order No. with "W" in penultimate position are
equipped with a straight-through transformer.
4)
Observe maximum rated operational current of the devices.
* You can order this quantity or a multiple thereof.
5/42
Siemens LV 1 · 2007
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
3RB21 solid-state overload relays with spring-loaded terminals on auxiliary current side for direct mounting1)2)
and stand-alone installation1)3), CLASS 5, 10, 20 and 30 adjustable
Features and technical specifications:
• Overload protection, phase failure protection and unbalance
protection
• Internal ground fault detection (activatable)
• Internal power supply
• Auxiliary contacts 1 NO + 1 NC
Size of
Rating
contactor for induction
4)
motor
Rated value5)
kW
•
•
•
•
Manual and automatic RESET
Electrical remote RESET integrated
Switch position indicator
TEST function and self-monitoring
Set current value
of the inversetime delayed
overload release
Short-circuit DT Spring-loaded terminals
protection
(on auxiliary current side)
with fuse,
type of coorOrder No.
Price
dination 2,
per PU
gL/gG operational class6)
A
A
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Size S001)
S00
0.04 … 0.09
0.1 … 0.4
1
A
3RB21 13-4RD0
1
1 unit
101
0.200
0.12 … 0.37
0.32 … 1.25
2
A
3RB21 13-4ND0
1
1 unit
101
0.200
0.55 … 1.5
1…4
10
A
3RB21 13-4PD0
1
1 unit
101
0.200
1.1 … 5.5
3 … 12
20
A
3RB21 13-4SD0
1
1 unit
101
0.200
0.220
3RB21 13-4RD0
Size S01)
0.55 ... 1.5
1 ... 4
10
A
3RB21 23-4PD0
1
1 unit
101
1.1 … 5.5
3 … 12
20
A
3RB21 23-4SD0
1
1 unit
101
0.220
3 … 11
6 … 25
35
A
3RB21 23-4QD0
1
1 unit
101
0.220
3 … 11
6 … 25
35
0.360
5
S0
3RB21 23-4QD0
Size S21)3)7)
S2
7.5 … 22
12.5 … 50
100
A
3RB21 33-4QD0
1
1 unit
101
A
3RB21 33-4QX1
1
1 unit
101
0.230
A
3RB21 33-4UD0
1
1 unit
101
0.360
A
3RB21 33-4UX1
1
1 unit
101
0.230
3RB21 33-4UD0
Size S31)3)7)
S3
7.5 … 22
12.5 … 50
125
A
3RB21 43-4UD0
1
1 unit
101
0.560
11 … 45
25 … 100
200
A
3RB21 43-4ED0
1
1 unit
101
0.560
A
3RB21 43-4EX1
1
1 unit
101
0.450
A
3RB21 53-4FF2
1
1 unit
101
1.030
A
3RB21 53-4FX2
1
1 unit
101
0.690
3RB21 43-4ED0
Size S6 2)7)
S6 with
bar connection
22 … 90
50 … 200
355
S6 with
box terminals
3RB21 53-4FX2
Size S10/S122)
S10/S12
and size
14
(3TF68/
3TF69)
22 … 110
55 … 250
500
A
3RB21 63-4GF2
1
1 unit
101
1.820
90 … 450
160 … 630
800
A
3RB21 63-4MF2
1
1 unit
101
1.820
3RB21 63-4MF2
1)
2)
3)
4)
The relays with an Order No. ending with "0" are designed for direct
mounting. With the matching terminal brackets (see Accessories) the sizes
S00 and S0 can also be installed as stand-alone units.
The relays with an Order No. ending with "2" are designed for direct
mounting and stand-alone installation. For 3TF68/3TF69 contactors, direct
mounting is not possible.
The relays with an Order No. ending with "1" are designed for stand-alone
installation.
5)
6)
7)
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.
Maximum fuse for overload relay, type of coordination 2. For fuse values in
conjunction with contactors, see Technical Specifications, Short-Circuit
Protection with Fuses for Motor Feeders.
The relays with an Order No. with "X" in penultimate position are equipped
with a straight-through transformer.
Observe maximum rated operational current of the devices.
* You can order this quantity or a multiple thereof.
Siemens LV 1 · 2007
5/43
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB22, 3RB23 for high-feature applications
■ Overview
5
The modular, solid-state overload relays with external power
supply type 3RB22 (with monostable auxiliary contacts) and
type 3RB23 (with bistable auxiliary contacts) up to 630 A (up to
820 A possible with a series transformer) have been designed
for inverse-time delayed protection of loads with normal and
heavy starting (see LV 1 T, Function) against excessive temperature rises due to overload, phase unbalance or phase failure.
An overload, phase unbalance or phase failure result in an increase of the motor current beyond the set motor rated current.
This current rise is detected by means of a current measuring
module and electronically evaluated by a special evaluation
module which is connected to it. The evaluation electronics
sends a signal to the auxiliary contacts. The auxiliary contacts
then switch off the load by means of a contactor. The break time
depends on the ratio between the tripping current and set current Ie and is stored in the form of a long-term stable tripping
characteristic (see LV 1 T, Characteristic Curves). The "tripped"
status is signaled by means of a continuous red "OVERLOAD"
LED.
3RB22/3RB23 evaluation module
(1) Green "READY" LED:
A continuous green light signals that the device is working correctly.
(2) Red "GND FAULT" LED
A continuous red light signals a ground-fault tripping.
(3) Red "THERMISTOR" LED:
A continuous red light signals an active thermistor trip.
(4) Red "OVERLOAD" LED:
A continuous red light signals an active overload trip; a flickering red
light signals an imminent trip (overload warning).
(5) Motor current and trip class adjustment:
Setting the device to the motor current and to the required trip class
dependent on the start-up conditions is easy with the two rotary
switches.
(6) Selector switch for manual/automatic RESET:
With this switch you can choose between manual and automatic
RESET.
(7) Test/RESET button:
Enables testing of all important device components and functions,
plus resetting of the device after a trip when manual RESET is selected.
(8) Connecting terminals (removable terminal block):
The generously sized terminals permit connection of two conductors
with different cross-sections for the auxiliary, control and sensor circuits. Connection is possible with screw connection and alternatively
with spring-type connection.
(9) 3RB29 85 function expansion module:
Enables more functions to be added, e.g. internal ground fault detection and/or an analog output with corresponding signals.
The LED indicates imminent tripping of the relay due to overload,
phase unbalance or phase failure by flickering when the limit
current has been violated. This warning can also issued as a signal through auxiliary contacts.
In addition to the described inverse-time delayed protection of
loads against excessive temperature rises, the 3RB22/3RB23
solid-state overload relays also allow direct temperature monitoring of the motor windings (full motor protection) by connection
with short-circuit and open-circuit detection of a PTC sensor circuit. With this temperature-dependent protection, the loads can
be protected against overheating caused indirectly by reduced
coolant flow, for example, which cannot be detected by means
of the current alone. In the event of overheating, the devices
switch off the contactor, and thus the load, by means of the auxiliary contacts. The "tripped" status is signaled by means of a
continuously illuminated "THERMISTOR" LED.
To also protect the loads against high-resistance short-circuits
due to damage to the insulation, humidity, condensed water,
etc., the 3RB22/3RB23 solid-state overload relays offer the possibility of internal ground fault monitoring in conjunction with a
function expansion module (for details see Selection and Ordering Data, not possible in conjunction with contactor assembly for
Wye-Delta starting). In the event of a ground fault the 3RB22/
3RB23 relays trip instantaneously. The "tripped" status is signaled by means of a continuous red "GND Fault" LED. Signaling
through auxiliary contacts is also possible.
After tripping due to overload, phase unbalance, phase failure,
thermistor tripping or ground fault, the relay is reset manually or
automatically after the recovery time has elapsed
(see, LV 1 T Function).
In conjunction with a function expansion module the motor current measured by the microprocessor can be output in the form
of an analog signal 4 ... 20 mA DC for operating rotary coil instruments or for feeding into analog inputs of programmable
logic controllers. With an additional AS-Interface analog module
the current values can also be transferred over the AS-i bus
system.
The devices are manufactured in accordance with environmental guidelines and contain environmentally friendly and reusable
materials.
They comply with all important worldwide standards and approvals.
3RB29 06 current measuring module
5/44
Siemens LV 1 · 2007
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB22, 3RB23 for high-feature applications
The most important features and benefits of the 3RB22/3RB23
solid-state overload relays are listed in the overview table
(see Overload Relays, General Data).
■ Application
Industries
The 3RB22/3RB23 solid-state overload relays are suitable for
customers from all industries who want to guarantee optimum
inverse-time delayed and temperature-dependent protection of
their electrical loads (e.g. motors) under normal and heavy starting conditions (CLASS 5 to CLASS 30), minimize project completion times, inventories and power consumption, and optimize
plant availability and maintenance management.
Application
The 3RB22/3RB23 solid-state overload relays have been designed for the protection of three-phase asynchronous and
single-phase AC motors.
If single-phase AC motors are to be protected by the
3RB22/3RB23 solid-state overload relays, the main current
paths of the current measuring modules must be seriesconnected (see LV 1 T, Schematics).
Ambient conditions
The devices are insensitive to external influences such as
shocks, corrosive environments, ageing and temperature
fluctuation.
"Increased safety" type of protection EEx e according to
ATEX directive 94/9/EC
The 3RB22 (monostable) solid-state overload relays are suitable
for the overload protection of explosion-proof motors with "increased safety" type of protection EEx e. The relays meet the requirements of EN 60079-7 (Electrical apparatus for potentially
explosive atmospheres – Increased safety "e").
The basic safety and health requirements of ATEX directive
94/9/EC are fulfilled by compliance with
• EN 60947-1
• EN 60947-4-1
• EN 60947-5-1
• EN 60079-14
EU type test certificate for Group II, Category (2) G/D exists.
■ Accessories
The following accessories are available for the 3RB22/3RB23
solid-state overload relays:
• A sealable cover for the evaluation module
• Box terminal blocks for the current measuring modules size S6
and S10/S12
• Terminal covers for the current measuring modules size S6
and S10/S12
• Push-in lugs for screw mounting the size S00 to S3 current
measuring modules
For the temperature range from –25 C to +60 °C, the 3RB22/
3RB23 solid-state overload relays compensate the temperature
according to IEC 60947-4-1.
Configuration notes for use of the devices below –25 °C or above
+60 °C on request.
Siemens LV 1 · 2007
5/45
5
■ Benefits
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB22, 3RB23 for high-feature applications
■ Selection and ordering data
Conversion aid 3RB12 ––> 3RB22/3RB23
Size
Previous type
Replacement type
Overload relays (complete units)
Current measuring module
Evaluation module
Function expansion
module
3RB22/3RB23
3RB29
[email protected] 83-4AA1
3RB29 [email protected]@@
3RB12
Setting range in A
3RB12 [email protected]@@ 1.25 ... 6.3
S00/S0
3RB12 [email protected]@@ 6.3 ... 25
S2/S3
3RB12 [email protected]@@ 25 ... 100
S6
3RB12 [email protected]@@
S10/S12
3RB12 [email protected]@@ 125 ... 500
3RB12 [email protected]@@
5
50 ... 205
200 ... 820
3RB29
Setting range in A
3RB29 06-2BG11)
0.3 ... 3
3RB29 06-2DG11)
2.4 ... 25
3RB29 06-2JG11)
10 ... 100
3RB29 56-2TG22)
3RB29 56-2TH2
2)
3RB29 66-2WH22)
20 ... 200
63 ... 630 (820)3)
110 ... 120 V AC
G
Integrated
Integrated
220 ... 240 V AC
M
Integrated
Integrated
24 V DC
B
Integrated
Integrated
--
Standard version with
ground fault signaling
00
Not available
Standard version with
overload warning
10
2
Version with internal
ground fault detection and
ground fault signal
20
2
CB1
Version with internal
ground fault detection and
overload warning
30
2
CA1
Version with analog output
40
2
AA0
Bistable version with
ground fault signaling
01
Bistable version with
overload warning
11
1)
2)
3)
Use 3RB29 87-2B connecting cable.
Use 3RB29 87-2D connecting cable.
Motor currents up to 820 A can be recorded and evaluated by a current
measuring module, e.g. 3RB29 06-2BG1 (0.3 ... 3 A) , in combination with
a 3UF18 68-3GA00 (820 A / 1 A) series transformer.
5/46
Siemens LV 1 · 2007
Not available
3
Not required
-Not required
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB22, 3RB23 for high-feature applications
3RB22/3RB23 solid-state overload relays for full motor protection with screw terminals or spring-loaded terminals
for stand-alone installation, CLASS 5, 10, 20 and 30 adjustable
Features and technical specifications:
• Overload protection, phase failure protection and unbalance
protection
• External power supply 24 ... 240 V AC/DC
• Auxiliary contacts 2 NO +2 NC
• Manual and automatic RESET
• Electrical remote RESET integrated
• 4 LEDs for operating and status displays
Size of
contactor
• TEST function and self-monitoring
• Internal ground fault detection with function expansion
module
• Screw terminals or spring-loaded terminals for auxiliary,
control and sensor circuits
• Input for PTC sensor circuit
• Analog output with function expansion module
Version
DT Screw terminals
Order No.
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
Price
per PU
kg
Evaluation modules
S00 ... S12
Monostable
}
3RB22 83-4AA1
1
1 unit
101
0.300
Bistable
}
3RB23 83-4AA1
1
1 unit
101
0.300
Version
DT Spring-loaded terminals
Size of
contactor
Order No.
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
Price
per PU
kg
Evaluation modules
S00 ... S12
Monostable
A
3RB22 83-4AC1
1
1 unit
101
0.300
Bistable
A
3RB23 83-4AC1
1
1 unit
101
0.300
Version
DT Order No.
3RB2. 83-4AC1
Size of
contactor
Price
per PU
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Function expansion modules
for plugging into evaluation module (1 unit)
S00 ... S12
1)
Analog Basic 11) modules
Analog output DC 4 ... 20 mA,
with overload warning
}
3RB29 85-2AA0
1
1 unit
101
0.030
Analog Basic 1 GF1)2) modules
Analog output DC 4 ... 20 mA,
with internal ground fault detection and
overload warning
}
3RB29 85-2AA1
1
1 unit
101
0.030
Analog Basic 2 GF1)2) modules
Analog output DC 4 ... 20 mA,
with internal ground fault detection and
ground fault signaling
}
3RB29 85-2AB1
1
1 unit
101
0.030
Basic 1 GF2) modules
with internal ground fault detection and
overload warning
}
3RB29 85-2CA1
1
1 unit
101
0.030
Basic 2 GF2) modules
with internal ground fault detection and
ground fault signaling
}
3RB29 85-2CB1
1
1 unit
101
0.030
The analog signal DC 4 ... 20 mA can be used for operating rotary coil
instruments or for feeding into analog inputs of programmable logic
controllers.
2)
The following information on ground-fault protection refers to sinusoidal
residual currents at 50/60 Hz:
- With a motor current of between 0.3 and 2 times the set current Ie the unit
will trip at a ground-fault current equal to 30 % of the set current.
- With a motor current of between 2 and 8 times the set current Ie the unit
will trip at a ground fault-current equal to 15 % of the set current.
- The response delay amounts to between 0.5 and 1 second.
* You can order this quantity or a multiple thereof.
Siemens LV 1 · 2007
5/47
5
3RB2. 83-4AA1
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
3RB22, 3RB23 for high-feature applications
Current measuring modules for direct mounting1) and stand-alone installation1)2)
Size of
Rating for
contactor3) induction motor
Rated value4)
kW
Set current value
of the inversetime delayed
overload release
Short-circuit DT Order No.
protection
with fuse,
type of coordination 2,
gL/gG operational class5)
Price
per PU
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
A
Size S00/S0 2)6)
0.09 … 1.1
0.3 … 3
20
}
3RB29 06-2BG1
1
1 unit
101
0.100
1.1 … 11
2.4 … 25
63
}
3RB29 06-2DG1
1
1 unit
101
0.150
S2/S3
5.5 … 45
10 … 100
315
}
3RB29 06-2JG1
1
1 unit
101
0.350
S6 with
bar connection
11 … 90
20 … 200
315
}
3RB29 56-2TH2
1
1 unit
101
1.000
}
3RB29 56-2TG2
1
1 unit
101
0.600
}
3RB29 66-2WH2
1
1 unit
101
1.750
S00/S0
3RB29 06-2.G1
Size S2/S3 2)6)
3RB29 06-2JG1
5
Size S6 1)6)
3RB29 56-2TG2
S6 with
box terminals
Size S10/S121)
S10/S12
37 … 450
and size
14 (3TF68/
3TF69)
63 … 630
800
3RB29 66-2WH2
1)
2)
3)
The current measuring modules with an Order No. ending with "2" are
designed for direct mounting and stand-alone installation. For
3TF68/3TF69 contactors, direct mounting is not possible.
The current measuring modules with an Order No. ending with "1" are
designed for stand-alone installation.
Observe maximum rated operational current of the devices.
Size of
contactor
Version
4)
5)
6)
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.
Maximum fuse for overload relay, type of coordination 2. For fuse values in
conjunction with contactors, see Technical Specifications, Short-Circuit
Protection with Fuses for Motor Feeders.
The modules with an Order No. with "G" in penultimate position are
equipped with a straight-through transformer.
DT Order No.
Price
per PU
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Connecting cables
For connection between evaluation module and
current measuring module
S00 ... S3 • Length 0.1 m
(only for mounting of the evaluation module
directly onto the current measuring module)
}
3RB29 87-2B
1
1 unit
101
0.010
S00 ... S12 • Length 0.5 m
}
3RB29 87-2D
1
1 unit
101
0.020
3RB29 87-2.
* You can order this quantity or a multiple thereof.
5/48
Siemens LV 1 · 2007
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
Accessories
■ Overview
Overload relays for standard applications
Overload relays for high-feature applications
The following accessories are available for the 3RB20/3RB21
solid-state overload relays:
• One terminal bracket each for the overload relays size S00
and S0 (sizes S2 to S12 can be installed as single units without
a terminal bracket)
• One mechanical remote RESET module for all sizes
• One cable release for resetting devices which are difficult to
access (for all sizes)
• One sealable cover for all sizes
• Box terminal blocks for sizes S6 and S10/S12
• Terminal covers for sizes S2 to S10/S12
The following accessories are available for the 3RB22/3RB23
solid-state overload relays:
• A sealable cover for the evaluation module
• Box terminal blocks for the current measuring modules size S6
and S10/S12
• Terminal covers for the current measuring modules size S6
and S10/S12
• Push-in lugs for screw mounting the size S00 to S3 current
measuring modules
■ Selection and ordering data
Version
Size
DT Order No.
Price
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Terminal brackets for stand-alone installation1)
S00
}
3RB29 13-0AA1
1
1 unit
101
0.060
S0
}
3RB29 23-0AA1
1
1 unit
101
0.080
Resetting plungers, holders and formers S00 ...
S10/S12
}
3RU19 00-1A
1
1 set
101
0.038
Pushbuttons with extended stroke
(12 mm), IP65, Ø 22 mm
B
3SB30 00-0EA11
1
1 unit
102
0.021
Extension plungers
for compensation of the distance between
a pushbutton and the unlatching button of
the relay
A
3SX1 335
1
1 unit
102
0.004
• Length 400 mm
}
3RU19 00-1B
1
1 unit
101
0.063
• Length 600 mm
}
3RU19 00-1C
1
1 unit
101
0.073
5
For separate mounting of the overload
relays; screw and snap-on mounting onto
TH 35 standard mounting rail
3RB29 .3-0AA1
Mechanical RESET2)
3RU19 00-1A
with pushbutton and
extension plunger
Cable releases with holder for RESET2)
For Ø 6.5 mm holes in the control panel;
max. control panel thickness 8 mm
S00 ...
S10/S12
3RU19 00-1.
1)
Only for 3RB20/3RB21.
2)
Only for 3RB20/3RB21. The accessories are identical to those of the
3RU11 thermal overload relays.
* You can order this quantity or a multiple thereof.
Siemens LV 1 · 2007
5/49
© Siemens AG 2007
Overload Relays
3RB2 Solid-State Overload Relays
Accessories
Version
Size
DT Order No.
Price
PU
(UNIT,
SET, M)
PS*
PG
Weight
per PU
approx.
kg
Sealable covers
For covering the setting knobs
• For 3RB20/3RB21
S00 ...
S10/S12
}
3RB29 84-0
1 10 units
101
0.020
• For 3RB22/3RB23
–
}
3RB29 84-2
1 10 units
101
0.050
Terminal covers
Covers for cable lugs and rail connections
5
3RT19 46-4EA1
3RT19 36-4EA2
The figures show mounting on the contactor
• Length 55 mm1)
S3
}
3RT19 46-4EA1
1
1 unit
101
0.037
• Length 100 mm
S6
}
3RT19 56-4EA1
1
1 unit
101
0.067
• Length 120 mm
S10/S12
}
3RT19 66-4EA1
1
1 unit
101
0.124
Covers for box terminals
• Length 20.6 mm1)
S2
}
3RT19 36-4EA2
1
1 unit
101
0.016
• Length 20.8 mm1)
S3
}
3RT19 46-4EA2
1
1 unit
101
0.023
• Length 25 mm
S6
}
3RT19 56-4EA2
1
1 unit
101
0.028
• Length 30 mm
S10/S12
}
3RT19 66-4EA2
1
1 unit
101
0.038
Covers for screw terminals
between contactor and overload relay,
without box terminals
(1 unit required per combination)
S6
}
3RT19 56-4EA3
1
1 unit
101
0.021
S10/S12
}
3RT19 66-4EA3
1
1 unit
101
0.062
• Up to 70 mm2
S62)
}
3RT19 55-4G
1
1 unit
101
0.237
• Up to 120 mm2
S6
}
3RT19 56-4G
1
1 unit
101
0.270
• Up to 240 mm2
S10/S12
}
3RT19 66-4G
1
1 unit
101
0.676
}
3RP19 03
1 10 units
101
0.002
100 10 units
101
0.100
Box terminal blocks
For round and ribbon cables
For conductor cross-sections,
see LV 1 T "Technical Specifications"
3RT19 5.-4G
Push-in lugs
For screw fixing of 3RB22/3RB23 overload -relays
3RP19 03
For screw fixing of 3RB29 06 current
measuring modules
(2 units are required per module)
S00 ... S3 C
3RB19 00-0B
3RB19 00-0B
For more accessories (tools for spring-loaded terminals and
labeling plates), see page 5/56.
1)
2)
Only for 3RB20/3RB21. The accessories are identical to those of the
3RU11 thermal overload relays.
In the scope of supply for 3RT10 54-1 contactors (55 kW).
* You can order this quantity or a multiple thereof.
5/50
Siemens LV 1 · 2007

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