WEG MPW18 User manual

Low Voltage Industrial Controls
New WEG MPW18 & MPW40
Manual Motor Protectors

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Low Voltage Industrial Controls
1-800-ASK4WEG | www.weg.net/us Data is subject to change without notice.

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WEG Automation - Products and Solutions
Data is subject to change without notice.
Low Voltage Industrial Controls
Manual Motor Protectors
WEG MPW18 AND MPW40
MPW18 & 40 Part Number Structure C-3
MPW18 Selection Table and Pricing C-3
MPW40 Selection Table and Pricing C-4
MPW18 Overview C-5
MPW40 Overview C-6
Accessories C-7
Technical Data C-11
Breaking Capacities C-14
Curves C-15
Diagrams and Dimensions C-16

C-2
Low Voltage Industrial Controls
1-800-ASK4WEG | www.weg.net/us Data is subject to change without notice.
Developed according to IEC 60947 and UL 508 international standards, the new WEG MPW line of
motor protective circuit breakers are modular and compact but at the same time robust and highly
reliable, meeting the expectations of the most demanding users.
The MPWs are designed with the visual identity of WEG, a brand recognized worldwide for its quality.
MPW40
JMotor protective circuit breaker up to 40 A - 45 mm wide
JThermal-magnetic circuit breaker (provides protection
against short-circuit and overload) or only magnetic circuit
breaker (provides protection against short-circuit)
JSame technical features (mechanical and electrical) of
former MPW25 (up to 32 A)
JRotary handle operated
MPW18
JMotor protective circuit breaker up to 18 A
JThermal-magnetic circuit breaker (provides protection
against short-circuit and overload) or only magnetic circuit
breaker (provides protection against short-circuit)
JSame technical features (mechanical and electrical) of
former MPW16 (up to 16 A)
JPushbutton operated
New WEG MPW Motor Circuit Breakers

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WEG Automation - Products and Solutions
Data is subject to change without notice.
Low Voltage Industrial Controls
40 - 3 -
Frame
*For Reference only. Not intended to create part numbers.
MPW18/40 Catalog Number Structure
Overload Setting Range
U020 = 16.0 - 20.0 Amps
U025 = 20.0 - 25.0 Amps
U032 = 25.0 - 32.0 Amps
U040 = 32.0 - 40.0 Amps**
D016= 1.0 - 1.60 Amps
D025 = 1.60 - 2.50 Amps
U004 = 2.80 - 4.0 Amps
D063 = 4.0 - 6.30 Amps
U004 = 2.80 - 4.0 Amps
D063 = 4.0 - 6.30 Amps
3 = 3NO Power Poles MPW18
C025 = 0.160 - 0.250 Amps
MPW40
MPW U004
Mounts To
CWB9 - CWB38
C016 = 0.10 - 0.160 Amps
U010 = 6.30 - 10.0 Amps
U016 = 10.0 - 16.0 Amps
C016 = 0.10 - 0.160 Amps
C025 = 0.160 - 0.250 Amps
D004 = 0.250 - 0.40 Amps
C063 = 0.43 - 0.63 Amps
U001 = 0.630 - 1.0 Amps
U004 = 2.80 - 4.0 Amps
Power Poles
U010 = 6.30 - 10.0 Amps
U016 = 10.0 - 16.0 Amps
18 = 18 Amps
40 = 40 Amps
U018 = 12.0 - 18.0 Amps
D004 = 0.250 - 0.40 Amps
C063 = 0.43 - 0.63 Amps
U001 = 0.630 - 1.0 Amps
U004 = 2.80 - 4.0 Amps
D016= 1.0 - 1.60 Amps
D025 = 1.60 - 2.50 Amps
MPW18 Motor Protective Circuit Breaker up to 18 A (Screw Terminal) - Thermomagnetic or Magnetic Only
JWith overload and short-circuit protection
JFixed short-circuit release 13 x lu
JWith phase-failure sensitivity according to IEC 60947-4-1
JWith temperature compensation
JFor use as main switch (IEC 60947-2)
JPushbutton operated
Maximum UL Horsepower
Thermal Setting Short-Circuit interruption capacity
Catalog Number List Price Multiplier SymbolSingle Phase Three Phase
115V 230V 200V 230V 460V 575V [A] 480V 600V
------0.10 - 0.16 50kA 10kA MPW18-3-C016 $97 Z4
- - - - - - 0.16 - 0.25 50kA 10kA MPW18-3-C025 $97 Z4
- - - - - 0.25 - 0.40 50kA 10kA MPW18-3-D004 $97 Z4
- - - - - - 0.40 - 0.63 50kA 10kA MPW18-3-C063 $105 Z4
-----1/2 0.63 - 1.0 50kA 10kA MPW18-3-U001 $105 Z4
-1/10 - - 3/4 3/4 1.0 - 1.6 50kA 10kA MPW18-3-D016 $105 Z4
-1/6 1/2 1/2 11 1/2 1.6 - 2.5 50kA 10kA MPW18-3-D025 $105 Z4
1/8 1/3 3/4 3/4 2 3 2.5 - 4.0 50kA 10kA MPW18-3-U004 $105 Z4
1/4 1/2 11 1/2 3 5 4.0 - 6.3 50kA 10kA MPW18-3-D063 $105 Z4
1/2 1 1/2 2357 1/2 6.3 - 10 50kA 5kA MPW18-3-U010 $105 Z4
1 2 3 5 10 10 10 - 16 30kA 5kA MPW18-3-U016 $105 Z4
1 3 5 5 10 15 12 - 18 30kA 5kA MPW18-3-U018 $120 Z4
Note: Horsepower ratings shown in the table are for reference only. Please refer to the Full Load Amps of the Motor for final selection.
MPW18 & MPW40
MPW18 Manual Motor Protector - Selection Table

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Low Voltage Industrial Controls
1-800-ASK4WEG | www.weg.net/us Data is subject to change without notice.
MPW40 Motor Protective Circuit Breaker up to 40 A (Screw Terminal) - Thermomagnetic or Magnetic Only
JWith overload and short-circuit protection
JFixed short-circuit release 13 x Iu
JWith phase-failure sensitivity according to IEC 60947-4-1
JWith temperature compensation
JFor use as main switch (IEC 60947-2)
JRotary handle operated
MPW40-PRODUCT SELECTION
Maximum UL Horsepower Thermal
Setting
Short-Circuit interruption
capacity Catalog Number List Price Multiplier
Symbol
Single Phase Three Phase
115V 230V 200V 230V 460V 575V [A] 480V 600V
------0.10 - 0.16 50kA 25kA MPW40-3-C016 $116 Z4
- - - - - - 0.16 - 0.25 50kA 25kA MPW40-3-C025 $116 Z4
- - - - - - 0.25 - 0.40 50kA 25kA MPW40-3-D004 $116 Z4
-----1/4 0.40 - 0.63 50kA 25kA MPW40-3-C063 $137 Z4
- - - - 1/2 1/2 0.63 - 1.0 50kA 25kA MPW40-3-U001 $137 Z4
-1/10 1/4 1/3 3/4 11.0 - 1.6 50kA 25kA MPW40-3-D016 $137 Z4
-1/6 1/2 1/2 1 1/2 1 1/2 1.6 - 2.5 50kA 25kA MPW40-3-D025 $137 Z4
1/8 1/3 3/4 1 2 3 2.5 - 4.0 50kA 25kA MPW40-3-U004 $137 Z4
1/4 3/4 1 1/2 1 1/2 3 5 4.0 - 6.3 50kA 25kA MPW40-3-D063 $137 Z4
1/2 1 1/2 3357 1/2 6.3 - 10 50kA 25kA MPW40-3-U010 $137 Z4
1 3 5 5 10 15 10 - 16 50kA 25kA MPW40-3-U016 $150 Z4
1 1/2 3 5 7 1/2 15 15 16 - 20 50kA 25kA MPW40-3-U020 $150 Z4
2 3 7 1/2 7 1/2 15 20 20 - 25 50kA 25kA MPW40-3-U025 $170 Z4
- 5 10 10 20 25 25 - 32 42kA 25kA MPW40-3-U032 $190 Z4
- 5 10 15 25 - 32 - 40 20kA 0kA MPW40-3-U040** $225 Z4
Note: Horsepower ratings shown in the table are for reference only. Please refer to the Full Load Amps of the Motor for final selection.
MPW40 with current limiter block (CLT25) - PRODUCT SELECTION
Maximum UL Horsepower
Thermal Setting Short-Circuit interruption
capacity
Individual Component Catalog Number1
Multiplier Symbol
Single Phase Three Phase
Catalog Number List Price Catalog Number List Price
115V 230V 200V 230V 460V 575V [A] 480V 600V
------0.10 - 0.16 100kA 50kA MPW40-3-C016 $116 CLT32 MPW40 $100 Z4
- - - - - - 0.16 - 0.25 100kA 50kA MPW40-3-C025 $116 CLT32 MPW40 $100 Z4
- - - - - - 0.25 - 0.40 100kA 50kA MPW40-3-D004 $116 CLT32 MPW40 $100 Z4
-----1/4 0.40 - 0.63 100kA 50kA MPW40-3-C063 $137 CLT32 MPW40 $100 Z4
- - - - 1/2 1/2 0.63 - 1.0 100kA 50kA MPW40-3-U001 $137 CLT32 MPW40 $100 Z4
-1/10 1/4 1/3 3/4 11.0 - 1.6 100k A 50kA MPW40-3-D016 $137 CLT32 MPW40 $100 Z4
-1/6 1/2 1/2 1 1/2 1 1/2 1.6 - 2.5 100kA 50kA MPW40-3-D025 $137 CLT32 MPW40 $100 Z4
1/8 1/3 3/4 1 2 3 2.5 - 4.0 100kA 50kA MPW40-3-U004 $137 CLT32 MPW40 $100 Z4
1/4 3/4 1 1/2 1 1/2 3 5 4.0 - 6.3 100kA 50kA MPW40-3-D063 $137 CLT32 MPW40 $100 Z4
1/2 1 1/2 3357 1/2 6.3 - 10 100kA 50kA MPW40-3-U010 $137 CLT32 MPW40 $100 Z4
1 3 5 5 10 15 10 - 16 100kA 50kA MPW40-3-U016 $150 CLT32 MPW40 $100 Z4
1 1/2 3 5 7 1/2 15 15 16 - 20 100kA 50kA MPW40-3-U020 $150 CLT32 MPW40 $100 Z4
2 3 7 1/2 7 1/2 15 20 20 - 25 100kA 50kA MPW40-3-U025 $170 CLT32 MPW40 $100 Z4
- 5 10 10 20 25 25 - 32 100kA 50kA MPW40-3-U032 $190 CLT32 MPW40 $100 Z4
Note: Horsepower ratings shown in the table are for reference only. Please refer to the Full Load Amps of the Motor for final selection.
1Individual Component Catalog Numbers are ordered separately.
** UL Certification Pending (32.0-40.0 Unit
MPW40 Manual Motor Protector - Selection Table

C-5
WEG Automation - Products and Solutions
Data is subject to change without notice.
Low Voltage Industrial Controls
1- MPW18 motor protective circuit breaker (screw terminal)
2- Feeder terminal FTBBS
3- Three-phase busbars BBS
4- Push-in-lugs PLMP
5- Side mounted auxiliary contact block ACBS
(screw terminal)
6- Undervoltage release URMP or shunt release SRMP
(screw terminal)
7- Front mounted auxiliary contact block ACBF
(screw terminal)
8 - Insulated enclosure PE66GN
9- Scale cover SCMP
10 - Trip signaling block TSB
11 - CWB9...38 contactors
12 - Link module ECCMP-18B38 (MPW18+CWB9...38)
2
3
6
110
57
11
12
4
8
MPW40-PRODUCT SELECTION
Maximum UL Horsepower Thermal
Setting
Short-Circuit interruption
capacity Catalog Number List Price Multiplier
Symbol
Single Phase Three Phase
115V 230V 200V 230V 460V 575V [A] 480V 600V
- - - - - - 0.10 - 0.16 50kA 25kA MPW40-3-C016 $116 Z4
- - - - - - 0.16 - 0.25 50kA 25kA MPW40-3-C025 $116 Z4
- - - - - - 0.25 - 0.40 50kA 25kA MPW40-3-D004 $116 Z4
- - - - - 1/4 0.40 - 0.63 50kA 25kA MPW40-3-C063 $137 Z4
- - - - 1/2 1/2 0.63 - 1.0 50kA 25kA MPW40-3-U001 $137 Z4
-1/10 1/4 1/3 3/4 11.0 - 1.6 50kA 25kA MPW40-3-D016 $137 Z4
-1/6 1/2 1/2 1 1/2 1 1/2 1.6 - 2.5 50kA 25kA MPW40-3-D025 $137 Z4
1/8 1/3 3/4 1 2 3 2.5 - 4.0 50kA 25kA MPW40-3-U004 $137 Z4
1/4 3/4 1 1/2 1 1/2 3 5 4.0 - 6.3 50kA 25kA MPW40-3-D063 $137 Z4
1/2 1 1/2 3357 1/2 6.3 - 10 50kA 25kA MPW40-3-U010 $137 Z4
1 3 5 5 10 15 10 - 16 50kA 25kA MPW40-3-U016 $150 Z4
1 1/2 3 5 7 1/2 15 15 16 - 20 50kA 25kA MPW40-3-U020 $150 Z4
2 3 7 1/2 7 1/2 15 20 20 - 25 50kA 25kA MPW40-3-U025 $170 Z4
- 5 10 10 20 25 25 - 32 42kA 25kA MPW40-3-U032 $190 Z4
- 5 10 15 25 - 32 - 40 42kA 25kA MPW40-3-U040** $225 Z4
Note: Horsepower ratings shown in the table are for reference only. Please refer to the Full Load Amps of the Motor for final selection.
MPW18 Manual Motor Protector - Overview

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Low Voltage Industrial Controls
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1- MPW40 motor protective circuit breaker (screw terminal)
2- Feeder terminal FTBBS
3- Three-phase busbars BBS
4- Push-in-lugs PLMP
5- Side mounted auxiliary contact block ACBS (screw terminal)
6- Undervoltage release URMP or shunt release SRMP
(screw terminal)
7- Front mounted auxiliary contact block ACBF (screw terminal)
8- Door coupling rotary handle RMMP
9- Door coupling rotary handle MRX
10- Front plate FME55
11 -Standard insulated enclosure PE55GN-E
12 -Large insulated enclosure LPE55GN-3
13 - Trip signaling block TSB
14 - LST25 - Feeder terminal for “Type E” motor starter
according to UL
15 - Current limiter CLT32 MPW40
16 - Scale cover SCMP
17 -Link moduleECCMP-40B38 (MPW40+CWB9...38)
18 - CWB9...38 contactors
5
3
2
4
14
1
17
18
13
1
7
9
8
10
6
1
11
12
15
16
MPW40 Manual Motor Protector - Overview

C-7
WEG Automation - Products and Solutions
Data is subject to change without notice.
Low Voltage Industrial Controls
Front Auxiliary Contact Block - ACBF
Left Side Auxiliary Contact Block - ACBS
For use with Auxiliary contacts Catalog # List Price
NO NC
MPW18
MPW401)
1 1 ACBS-11-B
$22.002 - ACBS-20-B
- 2 ACBS-02-B
For use with
Illustrative picture
Auxiliary contacts Catalog # List Price
NO NC
MPW18
MPW40 1 1 ACBF-11-B $20.00
Trip Signalling Block - TSB2)
Undervoltage Release - URMP1)
For use with Description Catalog # List Price
MPW18
MPW40
- Equipped with 2 auxiliary contacts (1NO + 1NC) for overload trip signalling and 2 other
auxiliary contacts (1NO + 1NC) for short-circuit trip signaling;
- To reset the circuit breaker after a short-circuit, the flag must be manually reset after the
cause of the failure has been solved;
- Lateral auxiliary contacts can be assembled together with the trip signalling block;
- Left side assembly only.
TSB-22-B $38.00
For use with Description Voltage and frequency2) Catalog # List Price
MPW12/18
MPW40
- Operating voltage:
>0.85...1.1 x Ue
- Non operating voltage:
<0.35...0.7 x Ue
- Right side assembly
220 V 50/60 Hz URMP D23-B
$56.00
24 V 50/60 Hz URMP D02-B
110 V 50 Hz / 120 V 60 Hz URMP V18-B
180 V 50 Hz / 208 V 60 Hz URMP V23-B
208 V 50 Hz / 240 V 60 Hz URMP V30-B
400-415 V 50 Hz / 480 V 60 Hz URMP V47-B
Shunt Release - SRMP1)
Notes: 1) TSB, URMP, AND SRMP are only available with screw terminals.
The following accessories can be assembled at the same time: ACBF + URMP/SRMP + TSB or ACBS + URMP/SRMP + TSB.
For use with Description Voltage and frequency2) Catalog # List Price
MPW12/18
MPW401)
- Operating voltage:
0.7...1.1 x Ue
- Right side assembly
20-24 V 50/60 Hz SRMP D51-B
$56.00
100-127 V 50/60 Hz SRMP D59-B
200-240 V 50/60 Hz SRMP D65-B
MPW Manual Motor Protector - Accessories

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Low Voltage Industrial Controls
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Connector Links for MPW18/40 & CWB Contactors
For use with Description Contactors Catalog # List Price
MPW18
For direct connection (electrical and
mechanical) of motor circuit breakers to
contactors.
CWB9...38 AC coil ECCMP-18B38 $20.00
MPW40
CWB9...38 AC coil ECCMP-40B38
$25.00
CWB9...38 DC coil ECCMP-40B38DC
Rotary Handles & Mechanism
For use with Description Handle
color Catalog # List Price
MPW40
- Degree of protection IP55/NEMA 1
- Shows circuit breaker position “I”(ON) or “O”(OFF);
- Panel door can only be opened in OFF position;
- Adjustable shaft length. There are 2 standard shaft sizes: 130-155 mm
(Model 130) and 330-355 mm (Model 330). To assemble the handle on the
circuit breaker the shaft must have a length of at least 80 mm;
- Up to 3 padlocks can be used in the OFF position. This blocks circuit breaker
operation and opens panel door;
- Handle can be mounted on panels with a thickness of 1 to 5 mm;
- Handle can be assembled even with circuit breaker turned in 90º position.
Black
RMMP-130 $60.00
RMMP-330 $70.00
Red
RMMP-130E $60.00
RMMP-330E $70.00
MPW40
- Panel door can be opened in ON position (thermometry);
- Degree of protection: MRX = IP65/NEMA 4X;
- Shows circuit breaker position “I”(ON) or “O”(OFF);
- Adjustable shaft length. There are 2 standard shaft sizes: 130-155 mm
(Model 130) and 330-355 mm (Model 330). To assemble the handle ON the
circuit breaker the shaft must have a length of at least 80 mm;
- Up to 3 padlocks can be used in the OFF position. This blocks circuit breaker
operation and opens panel door;
- Handle can be mounted on panels with a thinkness of 1 to 5 mm.
Black
MRX-130 $105.00
MRX-330 $115.00
Red
MRX-130E $105.00
MRX-330E $115.00
Standard Insulated Enclosure - MPE
For use with Picture Description Terminals Handle
color Catalog # List Price
MPW18
- Empty plastic enclosure;
- Degree of protection: IP66;
- Two M25 metric cable entry knockouts, top and bottom;
- Two M20 metric cable entry, back;
- Allows installing: MPW + ACBF11/PL lamps + ACBS;
- Color: cover (grey RAL 7035) and base (black RAL 7021).
Ground and
neutral - PE66GN $45.00
MPW40
- Empty plastic enclosure;
- Protection degree IP55;
- Allows installing: MPW + ACBF11/PL lamps + ACBS;
- Two M25 metric cable entry knockouts, top and bottom;
- Two M20 metric cable entry, back;
- Rotary handle on the cover connected on MPW's handle;
- Handle can be locked with up to 3 padlocks in the OFF position;
- Color: cover (grey RAL 7035) and base (black RAL 7021).
Ground and
neutral
Black PE55GN $45.00
Red PE55GN-E $45.00
MPW Manual Motor Protector - Accessories

C-9
WEG Automation - Products and Solutions
Data is subject to change without notice.
Low Voltage Industrial Controls
For use with Description Terminals Handle
color Catalog # List Price
MPW40
- Empty plastic enclosure;
- Protection degree IP55;
- Allows installing: MPW + ACBF11/PL lamps + ACBS /TSB +
URMP/SRMP;
- Two M25 metric cable entry knockouts, top and bottom;
- Two M20 metric cable entry, back;
- Rotary handle on the cover connected on MPW's handle;
- Handle can be locked with up to 3 padlocks in the OFF position;
- Color: cover (grey RAL 7035) and base (black RAL 7021).
Ground and
neutral
Black LPE55GN
$55.00
Red LPE55GN-E
Large Insulated Enclosure - MLPE
Manual Motor Protector Mounting Plate Adapter
For use with Picture Description Contactors Catalog # List Price
MPW18
MPW40
- Used for direct on line starters;
- Adapter fixed by screws or DIN rail 35 mm;
- 45 mm width;
- Motor protective circuit breaker + contactors: connection by cables.
CWB9...38 MA45DOL $40.00
MPW18
MPW40
- Used for reversing starters;
- Adapter fixed by screws or DIN rail 35 mm;
- 90 mm width;
- Motor protective circuit breaker + contactors: connection by cables.
2 x CWB9...38 MA90RVS $50.00
MPW18
MPW40
- Used for star-delta starters;
- Adapter fixed by screws or DIN rail 35 mm;
- 90 mm width;
- Motor protective circuit breaker + contactors: connection by cables.
CWB9...38 MA90SDS $50.00
Three-Phase Feeder Terminals
For use with Picture Description Catalog # List Price
MPW18
MPW40
- For feeding the busbars;
- Rated insulation voltage: 690 V ac;
- Ie = 63 A;
- Terminals: 6-25 mm2rigid wire and 6-16 mm2flexible wire with terminal.
FTBBS $35.00
MPW40
- Block module for Type E combination motor controller in accordance with UL (LST25+MP-
W+TSB);
- Rated insulation voltage: 690 V ac;
- Ie = 63 A;
- Terminals: 8-20 AWG.
LST25 $30.00
MPW Manual Motor Protector - Accessories

C-10
Low Voltage Industrial Controls
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Current Limiter
For use with Description Catalog # List Price
MPW40
- For protecting electrical circuits where high short-circuit breaking capacity is required:
100 kA @ 500 V ac.
Note: this accessory must be used together with a MPW motor protective circuit breaker up to
32 A.
CLT32
MPW40 $100.00
Three-Phase Busbars for Circuit Breakers Without Side Fitted Auxiliary Contacts
For use with Description Number of
circuit breakers Catalog # List Price
MPW18
MPW40
- For parallel blocking of side-by-side mounted circuit breakers;
- Without side auxiliary contacts;
- Enables the use of frontal auxiliary contact block ACBF-11;
- Rated insulation voltage: 690 V ac;
- Ie = 63 A.
2 BBS45-2 $32.00
3 BBS45-3 $35.00
4 BBS45-4 $45.00
5 BBS45-5 $60.00
Three-Phase Busbars for Motor Protective Circuit Breakers with Side Fitted Auxiliary Contacts - BBS54
For use with Description Number of
circuit breakers Catalog # List Price
MPW18
MPW40
- For parallel connection of circuit breakers with screw terminals mounted
side-by-side;
- Enables the use of side auxiliary contact block ACBS mounted on each motor
protective circuit breaker;
- Rated Insulation Voltage: 690 V ac;
- Ie = 63 A.
2 BBS54-2 $32.00
3 BBS54-3 $35.00
4 BBS54-4 $45.00
5 BBS54-5 $60.00
Shrouded for Unused Terminals - CSD
For use with Description Catalog # List Price
BBS45 and BBS54
Protection against direct contact in energized terminals without the use of busbars BBS.
NOTE: Sold in packs of 6 ea.
CSD $10.00
Scale Cover - SCMP
Push-In-Lugs - PLMP
For use with Description Catalog # List Price
MPW12...18
MPW40
Protects the current adjustment dial against direct contact while enabling the adjusted current to
be viewed. SCMP $5.00
For use with Description Catalog # List Price
MPW12...18
MPW40
For direct assembly of motor protective circuit breaker into any surface using screws.
NOTE: Sold in packs of 2 ea.
PLMP $0.50
MPW Manual Motor Protector - Accessories

C-11
WEG Automation - Products and Solutions
Data is subject to change without notice.
Low Voltage Industrial Controls
Notes: 1) 500 V with plastic enclosure.
2) Reduce current for temperatures exceeding +60 °C (87% to 70 °C).
3) Only available with spring terminal.
Models MPW18 MPW40
Maximum rated current Inmax (Ie) 18 A 40 A
Number of poles 3 3
Short-circuit release 13xIemax 13xIemax
Rated operational voltage Ue 690 V1) 690 V1)
Rated frequency 50/60 Hz 50/60 Hz
Rated insulation voltage Ui 690 V 690 V
Rated impulse withstand voltage Uimp 6 kV 6 kV
Use category IEC 60947-2 (circuit breaker) A A
IEC 60947-4-1 (motor starter) AC-3 AC-3
Tripping test Yes Yes
Overload protection Yes Yes
Phase failure sensitivity (IEC 60947-4-1) Yes Yes
Tripping indication No Yes
Tripping class (IEC 60947-4-1) 10 10
Maximum operation per hour Operations/hour 15 15
Altitude (m) 2000 2000
Degree of protection (IEC 60529) IP20 IP20
Mechanical life Number of operations 100000 100000
Electrical life Number of operations 100000 100000
Permissible ambient temperature
Transport and storage -50...+80 °C -50...+80 °C
Operation2) -20...+70 °C -20...+70 °C
Temperature compensation (IEC 60947-4-1) -20...+60 °C -20...+60 °C
Power dissipation per circuit breaker
Maximum rated currents In
≤10 A 7 W 7 W
≤12 A3) 7 W --
≤16 A 8 W 8 W
≤18 A 7 W --
≤20 A -- 9 W
≤25 A -- 15 W
≤32 A -- 15 W
≤40 A -- 15 W
Resistance to impact (IEC 60068-2-27) 15 g 15 g
Standards
IEC 60947-1 Yes
IEC 60947-2 Yes
IEC 60947-4-1 Yes
Connection
Type of terminal Spring Screws
Phillips (Nº 2)
Screws
Phillips (Nº 2)
Tightening torque N.m - 1.2...1.7 2...2.5
lb.in - 11...16 18...22
Dimensions
Width (mm) 45 45
Height (mm) 100 90
Depth (mm) 77 77
Altitude
(above sea level) - h
Rated operational voltage
Ue
Current correction factor
Iu
h ≤2000 m 690 V 1 x In
2000< h ≤3000 m 550 V 0.96 x In
3000< h ≤4000 m 480 V 0.93 x In
4000< h ≤5000 m 420 V 0.90 x In
Altitude - Correction Factor
The MPW motor protective circuit breakers do not undergo
any change to their specifed performance when applied at
an altitude of up to 2000 meters above sea level.
However, as the altitude increases, the atmospheric
properties vary in terms of dielectric rigidness and pressure.
Therefore, current and voltage correction factors must be
applied for altitudes exceeding 2000 meters, as shown in the
following table:
MPW Manual Motor Protectors - Technical Data

C-12
Low Voltage Industrial Controls
1-800-ASK4WEG | www.weg.net/us Data is subject to change without notice.
Main Terminal Capacity
Notes: 1) Mandatory use (finely stranded cable without end sleeve is not allowed).
2) 8 AWG for flexible cable only.
Models Type Number of conductors Cross-section
MPW18 Rigid or flexible cable 1...4 mm2
18...12 AWG
MPW40 Rigid or flexible cable
1...2.5 mm2
2.5...6 mm2
14...8 AWG2)
1 or 2
1 or 2
Auxiliary Contact Blocks - ACB
Undervoltage Release - URMP
Reference URMP
For use with MPW18 & MPW40
Rated insulation voltage Ui 690 V
Operating voltage
(enables cir. breaker switch ON) 0.85...1.1 x Ue
Non-operating voltage
(guarantees circuit breaker switch OFF) 0.35...0.7 x Ue
Energization consumption 20.2 VA / 13 W
Consumption 7.2 VA / 2.4 W
Max. opening time 20 ms
Type of terminal Flat
Type of screws Phillips (Nº 2)
Tightening torque 1...1.5 N.m (7...10 lb.in)
Rigid cable 1 or 2 x (0.5...1.5 mm2)
1 or 2 x (0.75...2.5 mm2)
1 or 2 x (18...14 AWG)
Flexible cable
Backup fuses gL/gG 10 A
Reference ACBF-11 ACBS- _ _ , TSB
For use with MPW18 & MPW40
Rated insulation voltage Ui 250 V 690 V
Utilization category 24 Vac 220-230 Vac 24 V ac 230 V ac 400 V ac 690 V ac
AC-15 2 A 0.5 A 6 A 6 A 3 A 1 A
AC-12 2.5 A 2.5 A 10 A 10 A 10 A 10 A
DC-13 24 V d 48 V dc 60 V dc 24 V dc 110 V dc 220 V dc 440 V dc
1 A 0.3 A 0.15 A 2 A 0.5 A 0.25 A 0.1 A
Type of terminal Flat Spring Flat Spring
Type of screw Phillips (Nº 2) - Phillips (Nº 2) -
Tightening torque 1...1.5 N.m (7...10 lb.in) - 1...1.5 N.m (7...10 lb.in) -
Rigid cable 1 or 2 x (0.5...1.5 mm2)
1 or 2 x (0.75...2.5 mm2)
1 or 2 x (18...14 AWG)
1 or 2 x (1...1.5 mm2)
1 or 2 x (18...16 AWG) 1 or 2 x (0.5...1.5 mm2)
1 or 2 x (0.75...2.5 mm2)
1 or 2 x (18...14 AWG)
1 or 2 x (1...1.5 mm2)
1 or 2 x (18...16 AWG)
Flexible cable - -
Finely stranded with end sleeve1) 1 or 2 x (1 mm2)
1 or 2 x (18 AWG)
1 or 2 x (1 mm2)
1 or 2 x (18 AWG)
Backup fuses gL/gG 10 A
MPW Manual Motor Protectors - Technical Data

C-13
WEG Automation - Products and Solutions
Data is subject to change without notice.
Low Voltage Industrial Controls
Shunt Release - SRMP
Reference codes SRMP
For use with MPW18 & MPW40
Rated insulation voltage Ui 690 V
Operating voltage
(guarantee cir. breaker switch OFF) 0.7...1.1 x Ue
Energization consumption 20.2 VA / 13 W
Max. opening time 20 ms
Type of terminal Flat
Type of screws Phillips (Nº 2)
Tightening torque 1...1.5 N.m (7...10 lb.in)
Rigid cable 1 or 2 x (0.5...1.5 mm2)
1 or 2 x (0.75...2.5 mm2)
1 or 2 x (18...14 AWG)
Flexible cable
Backup fuses gL/gG 10 A
Live or grounded parts distance to the circuit breaker
Model Ue
Minimum distance between the circuit
breaker and live or grounded parts (mm)
B C A
MPW18 Up to 690 V 20 75 9
MPW40 Up to 500 V 30 95 9
Up to 690 V 50 95 30
The motor protective circuit breaker can be mounted in any position, but according to IEC 60447 standard, the “On - I” indicator must be to the right, or up.
MPW Manual Motor Protectors - Technical Data
Mounting Configurations for MPW Motor Protective Circuit Breaker

C-14
Low Voltage Industrial Controls
1-800-ASK4WEG | www.weg.net/us Data is subject to change without notice.
MPW18 & MPW40
Models
Setting
overload
release
(A)
220-230 V ac 380-415 V ac 440 V ac 460-500 V ac 630-690 V ac
Icu Ics Icu Ics Icu Ics Icu Ics Icu Ics
kA kA kA kA kA kA kA kA kA kA
MPW12...18
0.10...0.16 100 100 100 100 100 100 100 100 10 10
0.16...0.25 100 100 100 100 100 100 100 100 10 10
0.25...0.4 100 100 100 100 100 100 100 100 10 10
0.4...0.63 100 100 100 100 100 100 100 100 10 10
0.63...1 100 100 100 100 100 100 100 100 10 10
1...1.6 100 100 100 100 100 100 100 100 10 10
1.6...2.5 100 100 100 100 100 100 100 100 8 8
2.5...4 100 100 100 100 100 100 100 100 8 8
4...6.3 100 100 100 100 100 100 100 100 8 8
6.3...10 100 100 50 10 50 10 10 10 5 5
10...16 100 100 10 10 10 10 10 8 4 3
12...18 100 100 10 10 10 10 10 8 4 3
MPW40
0.10...0.16 100 100 100 100 100 100 100 100 100 100
0.16...0.25 100 100 100 100 100 100 100 100 100 100
0.25...0.4 100 100 100 100 100 100 100 100 100 100
0.4...0.63 100 100 100 100 100 100 100 100 100 100
0.63...1 100 100 100 100 100 100 100 100 100 100
1...1.6 100 100 100 100 100 100 100 100 100 100
1.6...2.5 100 100 100 100 100 100 100 100 8 8
2.5...4 100 100 100 100 100 100 100 100 8 8
4...6.3 100 100 100 100 100 100 100 100 8 8
6.3...10 100 100 100 100 50 25 42 21 8 8
10...16 100 100 50 25 50 15 10 8 5 5
16...20 100 100 50 25 50 15 10 8 5 5
20...25 100 100 50 25 50 15 10 8 5 5
25...32 100 100 50 25 25 15 10 8 5 5
32...40 100 100 30 15 20 10 10 5 5 2
Model
Setting
overload
release
(A)
380-415 V ac 440 V ac 460-500 V ac 630-690 V ac
Icu Ics Icu Ics Icu Ics Icu Ics
kA kA kA kA kA kA kA kA
MPW40 +CLT32 MPW40
0.10...0.16 ♦♦♦♦♦♦♦♦
0.16...0.25 ♦♦♦♦♦♦♦♦
0.25...0.4 ♦♦♦♦♦♦♦♦
0.4...0.63 ♦♦♦♦♦♦♦♦
0.63...1 ♦♦♦♦♦♦♦♦
1...1.6 ♦♦♦♦♦♦♦♦
1.6...2.5 ♦♦♦♦♦♦50 50
2.5...4 ♦♦♦♦♦♦50 50
4...6.3 ♦♦♦♦♦♦50 50
6.3...10 ♦ ♦ 100 100 100 100 50 50
10...16 100 100 100 100 100 100 50 50
16...20 100 100 100 100 100 100 50 50
20...25 100 100 100 100 100 100 10 10
25...32 100 100 100 100 100 100 10 10
MPW Manual Motor Protectors - Rated Short-Circuit
Breaking Capacity (IEC 60947-2)
MPW Manual Motor Protectors + CLT32 Current Limiter
Rated Short-Circuit Breaking Capacity (IEC 60947-2)
MPW40+CLT32 MPW40

C-15
WEG Automation - Products and Solutions
Data is subject to change without notice.
Low Voltage Industrial Controls
The tripping characteristic shows the motor circuit breaker trip time in relation to the rated current.
The curves show average tolerance range values for an ambient temperature of 20 °C, starting in cold state. Thermal trip time
when working in operating temperature is reduced to around 25% of the presented values. Under normal operating conditions,
all 3 circuit breaker phases must be conducting.
MPW18 & MPW40
X Adjusted current Ie
second minute
3-phase
2-phase
milisecond
2h
100
60
40
20
10
6
4
2
1
40
20
10
6
4
2
1
600
400
200
100
60
40
20
10
6
411.5 2 3 4 5 6 7 8 9 10 15 20 30
Short-Circuit Current Limitation
Curve at 440 V - MPW40
Peak current (kA)
Prospective short-circuit current (kA) [RMS]
32 20
10
4.0
1.6
0.63
0.40
1.0
2.5
6.3
1625
0.16
0.25
1001010.1
0.001
0.01
0.1
1
10
MPW Manual Motor Protectors - Characteristics Curves

C-16
Low Voltage Industrial Controls
1-800-ASK4WEG | www.weg.net/us Data is subject to change without notice.
Diagrams
Typical Circuits
ACBF-11-B ACBS-11-B ACBS-20-B
Undervoltage release URMP Shunt release SRMP Trip signalling block TSB
S0...Sn - Buttons in the plant (NC)
URMP - Undervoltage release
S0...Sn - Buttons in the plant (NO)
S - MPW auxiliary contact
H1 - Short-circuit trip signalling
H2 - Overcurrent trip signalling
MPW - Motor protective circuit breaker thermomagnetic
(MPW12...40)
ACBS-02-B TSB-22-B
URMP. . . SRMP. . .
MPW
S
MPW40 + CLT32 MPW40 MPW40
ALIMENTADOR
MPW25
CARGA
CLT25
Feeder
Load
MPW - Diagrams and Typical Circuits

C-17
WEG Automation - Products and Solutions
Data is subject to change without notice.
Low Voltage Industrial Controls
MPW18 + Accessories
MPW18
Mounting Position
Single-phase or two-phase motor connection with MPW
49,9
I>I>I>
2T1 4T2 6T3
1L1 3L2 5L3
I>I>I>
2T1 4T2 6T3
1L1 3L2 5L3
M
~
M
~
L1 N L1 L3
90 49.9
30
Ø5
77
45
119
106
97
18
18
9
ACBS
ACBF
TSB
URMP
SRMP
DIN Trail 35
mm
MPW18 + CWB9...18 / CWB25...38
97
44.8
77
44.7
50
72
44.7
97
50
72
77
44.8
77
93 (BOBINA CA)
45
198
45 77
A
MPW18
ECCMP18-B38
CWB9...38
195 (CWB9...18)
198 (CWB25...38)
A CWB9...18 CWB25...38
AC coil 89.5 93
MPW - Diagrams and Typical Circuits
MPW - Dimensions (mm)

C-18
Low Voltage Industrial Controls
1-800-ASK4WEG | www.weg.net/us Data is subject to change without notice.
97.2
10.2
15.5 97.5
44.8
MPW40 + Accessories
MPW40
Mounting Position
ON
L
OFF
D
URMP
SRMP
ACBS
TSB
ACBF
90
1818 45
98 30
Ø5
DIN Trail
35 mm
119
106
98
9
MPW40 + CWB9...18 / CWB25...38
5
Current Limiter - CLT32 MPW40
98
45
98
45
102 (BOBINA CC)
93 (BOBINA CA)
198
98
45
97.5
45
72 30
Ø5
118
105 105
B
A
MPW40
CWB9...38
ECCMP-40B38 AC coil
ECCMP-40B38 DC coil
A CWB9...18 CWB25...38
AC coil 89.5 93
DC coil 95.7 102.2
BCWB9...18 CWB25...38
196 199
15.5
44.8
10.2
97.2
MPW - Dimensions (mm)