Cutler Hammer Freedom Series NEMA
Interchangeable Heater Starters &
Ferraz Shawmut Fuses
Type 2 Protection
Achieving Type 2 “No Damage” Motor Start Protection
Type 2 “No Damage” Protection - What Is It and Which Fuses Are Best?
Type 2 protection, also referred to as “no damage” protection, simply means that if a short circuit occurs, the short circuit protective device
will operate fast enough to prevent fault current damage to healthy equipment in the system. Tests show that current-limiting fuses are the best
choice for the protection of the motor controllers if damage-free performance is required. To ensure that correct fuse choices are made, short
circuit tests must be made on every possible combination of motor control and fuse. This sheet summarizes a major manufacturer’s motor
starter and the Ferraz Shawmut time-delay fuses which give Type 2 “no damage” protection. All combinations are UL witnessed and certified.
200 Volt, Three-Phase Motors
HP
SIZE
STARTER
NUMBER
230 Volt, Three-Phase Motors
HEATER
NUMBER CLASS RK1 SCCR (kA)
HP
SIZE
STARTER
NUMBER
HEATER
NUMBER
CLASS
RK1
SCCR
(kA)
1/2
00
AN16ANO_C H2006B-3
A6D5R
100
1/2
00 AN16ANO_C H2006B-3
A6D5R
100
3/4
00
AN16ANO_C H2007B-3
A6D6R
100
3/4
00 AN16ANO_C H2007B-3
A6D6R
100
1
00
AN16ANO_C H2008B-3
A6D8R
100
1
00 AN16ANO_C H2008B-3
A6D8R
100
1 1/2
0
AN16NDO_C H2009B-3
A6D12R
100
1 1/2
00 AN16ANO_C H2009B-3
A6D12R
100
2
0
AN16BNO_C H2010B-3 A6D17-1/2R
100
2
0
AN16BNO_C H2009B-3
A6D12R
100
3
0
AN16BNO_C H2011B-3
A6D25R
100
3
0
AN16BNO_C H2011B-3
A6D25R
100
7 1/2
1
AN16DNO_B H2013B-3
A6D45R
100
5
1
AN16DNO_B H2012B-3
A6D40R
100
AN16GNO_B H2015B-3
10
2
15
3
AN16KNO_
H2021-3
A6D70R
100
7 1/2
1
AN16DNO_B H2013B-3
A6D45R
100
A6D110R
100
7 1/2
2
AN16GNO_B H2013B-3
A6D45R
100
20
3
AN16KNO_
25
3
AN16KNO_
H2021-3
A6D110R
100
10
2
AN16GNO_B H2014B-3
A6D60R
100
H2022-3
A6D175R
100
15
2
AN16GNO_B H2015B-3
A6D70R
100
30
4
40
4
AN16NNO_
H2023-3
A6D200R
100
20
3
AN16KNO_
H2021-3
A6D110R
100
AN16NNO_
H2024-3
A6D200R
100
25
3
AN16KNO_
H2022-3
A6D175R
100
50
60
5
AN16SNO_B H2007B-3 A6D400R
100
30
3
AN16KNO_
H2022-3
A6D175R
100
5
AN16SNO_B H2007B-3 A6D400R
100
40
4
AN16NNO_
H2023-3
A6D200R
100
75
5
AN16SNO_B H2008B-3 A6D400R
100
50
4
AN16NNO_
H2024-3
A6D200R
100
60
5
AN16SNO_B H2007B-3 A6D400R
100
75
5
AN16SNO_B H2007B-3 A6D400R
100
100
5
AN16SNO_B H2008B-3 A6D400R
100
“_” Empty space designates where coil suffix must be added.
http://www.eaton.com/EatonCom/Markets/Electrical/Products/MotorControl/NEMAStartersContactors/
FreedomNEMA/index.htm?ssSourceNodeId=3483&ssSourceSiteId=EatonCom
460V & 575V on Reverse
Phone: 978-462-6662 Fax: 978-462-0181 us.ferrazshawmut.com
➤
Cutler Hammer Freedom Series NEMA
Interchangeable Heater Starters &
Ferraz Shawmut Fuses
Type 2 Protection
460 Volt, Three-Phase Motors
HP
SIZE
1/2
00
STARTER
NUMBER
575 Volt, Three-Phase Motors
HEATER
NUMBER CLASS RK1 SCCR (kA)
AN16ANO_C H2004B-3 A6D2-1/4R
100
HP
3/4
SIZE
STARTER
NUMBER
HEATER
NUMBER
CLASS
RK1
00 AN16ANO_C H2004B-3 A6D2-1/4R
SCCR
(kA)
100
3/4
00
AN16ANO_C H2005B-3 A6D3-2/10R
100
1
00 AN16ANO_C H2005B-3
A6D32/10R
1
00
AN16ANO_C H2006B-3
A6D5R
100
1 1/2
00 AN16ANO_C H2006B-3
A6D5R
100
1 1/2
00
AN16ANO_C H2007B-3
A6D6R
100
2
00 AN16ANO_C H2007B-3
A6D6R
100
2
00
AN16ANO_C H2008B-3
A6D8R
100
3
0
AN16BNO_C H2008B-3
A6D8R
100
3
0
AN16BNO_C H2009B-3
A6D12R
100
5
0
AN16BNO_C H2009B-3
A6D12R
100
5
0
AN16BNO_C H2010B-3 A6D17-1/2R
100
7 1/2
1
AN16DNO_B H2010B-3 A6D17-1/2R
100
7 1/2
1
AN16DNO_B H2011B-3
A6D25R
100
10
1
AN16DNO_B H2011B-3
A6D25R
100
10
1
AN16DNO_B H2012B-3
A6D40R
100
15
2
AN16GNO_B H2012B-3
A6D40R
100
15
2
AN16GNO_B H2013B-3
A6D45R
100
20
2
AN16GNO_B H2013B-3
A6D45R
100
20
2
AN16GNO_B H2014B-3
A6D60R
100
25
2
AN16GNO_B H2014B-3
A6D60R
100
25
2
AN16GNO_B H2015B-3
A6D70R
100
30
3
AN16KNO_
H2019-3
A6D60R
100
30
3
AN16KNO_
H2020-3
A6D80R
100
40
3
AN16KNO_
H2020-3
A6D80R
100
40
3
AN16KNO_
H2021-3
A6D110R
100
50
3
AN16KNO_
H2021-3
A6D110R
100
50
3
AN16KNO_
H2022-3
A6D175R
100
60
4
AN16NNO_
H2021-3
A6D110R
100
60
4
AN16NNO_
H2022-3
A6D175R
100
75
4
AN16NNO_
H2022-3
A6D175R
100
75
4
AN16NNO_
H2023-3
A6D200R
100
100
4
AN16NNO_
H2023-3
A6D200R
100
AN16NNO_
H2024-3
100
100
4
A6D200R
100
125
5
AN16SNO_B H2006B-3 A6D400R
100
125
5
AN16SNO_B H2007B-3 A6D400R
100
150
5
AN16SNO_B H2007B-3 A6D400R
100
150
5
AN16SNO_B H2007B-3 A6D400R
100
200
5
AN16SNO_B H2007B-3 A6D400R
100
200
5
AN16SNO_B H2008B-3 A6D400R
100
“_” Empty space designates where coil suffix must be added.
http://www.eaton.com/EatonCom/Markets/Electrical/Products/MotorControl/NEMAStartersContactors/FreedomNEMA/index.htm?ssSourceNodeId=3483&ssSourceSiteId=EatonCom
200V & 230V on Reverse
Phone: 978-462-6662 Fax: 978-462-0181 us.ferrazshawmut.com
➤
Cutler Hammer Freedom Series IEC
Interchangeable Heater Starters &
Ferraz Shawmut Fuses
Type 2 Protection
Achieving Type 2 “No Damage” Motor Start Protection
Type 2 “No Damage” Protection - What Is It and Which Fuses Are Best?
Type 2 protection, also referred to as “no damage” protection, simply means that if a short circuit occurs, the short circuit protective device will operate fast enough to prevent fault current damage to healthy equipment in the system. Tests show that current-limiting fuses are the best choice for the
protection of the motor controllers if damage-free performance is required. To ensure that correct fuse choices are made, short circuit tests must be
made on every possible combination of motor control and fuse. This sheet summarizes a major manufacturer’s motor starter and the Ferraz Shawmut
time-delay fuses which give Type 2 “no damage” protection. All combinations are UL witnessed and certified.
200 Volt, Three-Phase Motors
HP (FLC)
STARTER
NUMBER
1/2
AE16ANSO_C
230 Volt, Three-Phase Motors
HEATER
NUMBER CLASS J CLASS CC SCCR (kA)
H2106B-3
AJT6
ATDR6
HP (FLC)
STARTER
NUMBER
100
1/2
AE16ANSO_C
HEATER
NUMBER CLASS J CLASS CC
H2106B-3
AJT6
ATDR6
SCCR
(kA)
100
3/4
AE16ANSO_C
H2107B-3
AJT6
ATDR6†
100
3/4
AE16ANSO-C
H2106B-3
AJT6
ATDR6†
100
1
AE16ANSO_C
H2108B-3
AJT15
ATDR15
100
1
AE16ANSO-C
H2108B-3
AJT15
ATDR15
100
1 1/2
AE16ANSO_C
H2109B-3
AJT15
ATDR15
100
1 1/2
AE16ANSO-C
H2109B-3
AJT15
ATDR15
100
2
AE16BNSO_C
H2110B-3
AJT25
ATDR25
100
2
AE16BNSO_C
H2109B-3
AJT15
ATDR15
100
3
AE16CNSO_C
H2111B-3
AJT35
-
100
3
AE16BNSO_C
H2110B-3
AJT25
ATDR25
100
5
AE16DNSO_C
H2112B-3
AJT50
-
100
5
AE16DNSO_C
H2112B-3
AJT50
-
100
7 1/2
AE16ENSO_B
H2114B-3
AJT60
-
100
7 1/2
AE16ENSO_C
H2113B-3
AJT50
-
100
10
AE16HNSO_B
H2115B-3
AJT80
-
100
10
AE16FNSO_B
H2114B-3
AJT60
-
100
15
AE16JNSO_B
H2116B-3
AJT110
-
100
15
AE16HNSO_B
H2116B-3
AJT110
-
100
20
AE16KNSO_B
H2117B-3
AJT110
-
100
20
AE16JNSO_B
H2117B-3
AJT110
-
100
25
AE16LNSO_
H2022-3
AJT150
-
100
25
AE16KNSO_B
H2117B-3
AJT110
-
100
30
AE16MNSO_
H2023-3
AJT200
-
100
30
AE16LNSO_
H2022-3
AJT150
-
100
40
AE16NNSO_
H2024-3
AJT200
-
100
40
AE16MNSO_
H2023-3
AJT200
-
100
50
AE16NNSO_
H2024-3
AJT200
-
100
HP (FLC)
STARTER
NUMBER
3/4
AE16ANSO_C
H2104B-3
AJT3
ATDR3
100
460 Volt, Three-Phase Motors
HP (FLC)
STARTER
NUMBER
1/2
AE16ANSO_C
575 Volt, Three-Phase Motors
HEATER
NUMBER CLASS J CLASS CC SCCR (kA)
H2104B-3
AJT3
ATDR3
100
HEATER
NUMBER CLASS J CLASS CC
SCCR
(kA)
3/4
AE16ANSO_C
H2105B-3
AJT3
ATDR3†
100
1
AE16ANSO_C
H2105B-3
AJT3
ATDR3†
100
1
AE16ANSO_C
H2105B-3
AJT3
ATDR3
100
1 1/2
AE16ANSO_C
H2106B-3
AJT6
ATDR6
100
1 1/2
AE16ANSO_C
H2106B-3
AJT6
ATDR6
100
2
AE16ANSO_C
H2107B-3
AJT6
ATDR6
100
2
AE16ANSO_C
H2108B-3
AJT15
ATDR15
100
3
AE16ANSO_C
H2108B-3
AJT15
ATDR15
100
3
AE16ANSO_C
H2108B-3
AJT15
ATDR15
100
5
AE16ANSO_C
H2109B-3
AJT15
ATDR15
100
5
AE16BNSO_C
H2110B-3
AJT25
ATDR25
100
7 1/2
AE16BNSO_C
H2110B-3
AJT25
ATDR25
100
7 1/2
AE16CNSO_C
H2111B-3
AJT35
-
100
10
AE16CNSO_C
H2111B-3
AJT35
-
100
10
AE16DNSO_C
H2111B-3
AJT35
-
100
15
AE16DNSO_C
H2112B-3
AJT50
-
100
15
AE16ENSO_C
H2113B-3
AJT50
-
100
20
AE16ENSO_C
H2113B-3
AJT50
-
100
20
AE16FNSO_B
H2114B-3
AJT60
-
100
25
AE16FNSO_B
H2114B-3
AJT60
-
100
25
AE16GNSO_B
H2115B-3
AJT80
-
100
30
AE16GNSO_B
H2115B-3
AJT80
-
100
30
AE16HNSO_B
H2116B-3
AJT110
-
100
40
AE16HNSO_B
H2116B-3
AJT110
-
100
40
AE16JNSO_B
H2116B-3
AJT110
-
100
50
AE16KNSO_B
H2116B-3
AJT110
-
100
50
AE16KNSO_B
H2117B-3
AJT110
-
100
60
AE16LNSO_
H2021-3
AJT110
-
100
60
AE16LNSO_
H2022-3
AJT150
-
100
75
AE16LNSO_
H2022-3
AJT150
-
100
75
AE16MNSO_
H2023-3
AJT200
-
100
100
AE16MNSO_
H2023-3
AJT200
-
100
100
AE16NNSO_
H2024-3
AJT200
-
100
125
AE16NNSO_
H2024-3
AJT200
-
100
“_” Empty space designates where coil suffix must be added.
† May be too small to allow some motors to start.
http://www.eaton.com/EatonCom/Markets/Electrical/Products/MotorControl/NEMAStartersContactors/FreedomNEMA/index.htm?s
sSourceNodeId=3483&ssSourceSiteId=EatonCom
IEC Fixed Heater Starters on Reverse
Phone: 978-462-6662 Fax: 978-462-0181 us.ferrazshawmut.com
➤
Cutler Hammer Freedom Series IEC
Fixed Heater Starters &
Ferraz Shawmut Fuses
Type 2 Protection
200 Volt, Three-Phase Motors
230 Volt, Three-Phase Motors
STARTER
NUMBER
HP (FLC) (FIXED HEATERS) CLASS J CLASS CC SCCR (kA)
STARTER
NUMBER
HP (FLC) (FIXED HEATERS) CLASS J CLASS CC SCCR (kA)
1/2
AE17ANSO_FJ
AJT6
ATDR6
100
1/2
AE17ANSO_FH
AJT3†
ATDR3†
100
3/4
AE17ANSO_FK
AJT6
ATDR6
100
3/4
AE17ANSO_FK
AJT6
ATDR6†
100
1
AE17ANSO_FL
AJT15
ATDR15
100
1
AE17ANSO_FK
AJT6†
ATDR6†
100
1 1/2
AE17ANSO_FM
AJT15
ATDR15
100
1 1/2
AE17ANSO_FM
AJT15
ATDR15
100
2
AE17BNSO_FP
AJT25
ATDR25
100
2
AE17BNSO_FN
AJT15
ATDR15
100
3
AE17CNSO_FQ
AJT35
-
100
3
AE17CNSO_FP
AJT25
ATDR25
100
5
AE17DNSO_FR
AJT35
-
100
5
AE17DNSO_FR
AJT35
-
100
7 1/2
AE17FNSO_FT
AJT60
-
100
7 1/2
AE17ENSO_FS
AJT50
-
100
10
AE17HNSO_KC
AJT80
-
100
10
AE17FNSO_FT
AJT60
-
100
15
AE17JNSO_KE
AJT110
-
100
15
AE17HNSO_KD
AJT110
-
100
20
AE17KNSO_KF
AJT110
-
100
20
AE17JNSO_KE
AJT110
-
100
25
AE17KNSO_KF
AJT110
-
100
460 Volt, Three-Phase Motors
575 Volt, Three-Phase Motors
STARTER
NUMBER
HP (FLC) (FIXED HEATERS) CLASS J CLASS CC SCCR (kA)
STARTER
NUMBER
HP (FLC) (FIXED HEATERS) CLASS J CLASS CC SCCR (kA)
1/2
AE17ANSO_FF
AJT2
ATDR2
100
3/4
AE17ANSO_FF
AJT2
ATDR2†
3/4
AE17ANSO_FG
AJT3
ATDR3
100
1
AE17ANSO_FG
AJT3
ATDR3†
100
100
1
AE17ANSO_FH
AJT3
ATDR3†
100
1 1/2
AE17ANSO_FH
AJT3†
ATDR3†
100
1 1/2
AE17ANSO_FJ
AJT6
ATDR6
100
2
AE17ANSO_FJ
AJT6
ATDR6
100
2
AE17ANSO_FK
AJT6
ATDR6†
100
3
AE17ANSO_FL
AJT15
ATDR15
100
3
AE17ANSO_FM
AJT15
ATDR15
100
5
AE17ANSO_FM
AJT15
ATDR15
100
5
AE17BNSO_FN
AJT15
ATDR15
100
7 1/2
AE17BNSO_FP
AJT25
ATDR25
100
7 1/2
AE17CNSO_FQ
AJT35
-
100
10
AE17CNSO_FQ
AJT35
-
100
10
AE17DNSO_FR
AJT35
-
100
15
AE17DNSO_FR
AJT35
-
100
15
AE17ENSO_FS
AJT50
-
100
20
AE17ENSO_FS
AJT50
-
100
20
AE17FNSO_FT
AJT60
-
100
25
AE17FNSO_FT
AJT60
-
100
25
AE17GNSO_KC
AJT80
-
100
30
AE17GNSO_KC
AJT80
-
100
30
AE17HNSO_KD
AJT110
-
100
40
AE17HNSO_KD
AJT110
-
100
40
AE17JNSO_KE
AJT110
-
100
50
AE17KNSO_KE
AJT110
-
100
50
AE17KNSO_KF
AJT110
-
100
“_” Empty space designates where coil suffix must be added.
† May be too small to allow some motors to start.
http://www.eaton.com/EatonCom/Markets/Electrical/Products/MotorControl/NEMAStartersContactors/FreedomNEMA/index.htm?ssSourceNodeId=3483&ssSourceSiteId=EatonCom
Disclaimer: Regarding information available in this document, Ferraz Shawmut, Inc. does not warrant or assume any legal liability or responsibility for the accuracy or usefulness of
any information disclosed. The content in this guide is for informational purposes only. All information has been gathered from the individual websites of the product manufacturers
listed in this document.
IEC Interchangeable Heater Starters on Reverse
Phone: 978-462-6662 Fax: 978-462-0181 us.ferrazshawmut.com
➤
Facts About Type 2 “Do Damage”
Protection for Motor Starters
Type 2 Protection
How Do Short Circuit Currents Damage Motor Starters?
Short circuit currents can cause damage to electrical components by a combination of up to three ways:
➤ Excessive electromagnetic forces,
➤ Excessive heating, and
➤ Extreme heat energies due to arcs.
In the case of a contactor, the repulsive force created between contact surfaces during a short circuit can cause
the contacts to part and begin to break the fault current. The resultant arcing caused by this phenomena can lead to
disintegration of the contacts and without proper precautions could lead to a serious arc flash event. Because this force
is proportional to the “square of the current” (F ∝ Ip2), the magnitude of the force can build rapidly in the first half cycle.
Protection against these forces often requires that the instantaneous peak current be kept to a sufficiently low level by
current limiting devices.
The next element to consider is heating. Heating of the contact’s surfaces normally occurs because of the contact
resistance. Since this resistance is very low, the heat generated during normal operation can easily be dissipated and
operating temperatures kept within specified levels. However, under short circuit conditions the heat can build quickly to
high levels due to the thermal energy delivered by the current (Heat ∝ I2t). Excessive heating can damage contacts and also
burn open the current element of the overload relay which can potentially lead to an arc flash event if not properly protected.
Protection against this heating often requires that the I2t be kept to a sufficiently low level by current limiting devices.
Achieving Type 2 Protection
Type 2 Coordination not only ensures that there is no danger, but that there is “No-Damage” to the controller for downstream faults. The following
excerpt is from the UL 508E definition for Type 2 Coordination:
“Under short circuit conditions, the controller shall not result in danger to persons or the installation,
and after the short circuit test the controller shall be suitable for further use...”
The only allowable damage under Type 2 Coordination is light contact welding provided that the contacts are easily separable. To qualify for Type 2
Coordination (No-Damage Protection) the motor starter manufacturers must test all combinations of starters, contactors, overload relay and short
circuit protective devices (SCPD). The tests include:
➤ A low-level short circuit test to confirm proper operation of the SCPD.
➤ A high-level short circuit test to check for No Damage protection of the contactor and overload relay.
➤ A Dielectric Voltage-Withstand Test to prove the adequacy of the insulation after both short circuit current tests have been performed.
➤ An Overload Relay Calibration Test to verify that the overload relay conforms to published tripping characteristics.
➤ A discrimination test to ensure proper coordination between the overload relay and the fuse.
Achieving “No-Damage” short circuit protection of a motor starter requires that the overcurrent protective device limit both the peak current and the
I2t let - through energy. Type 2 coordination is typically obtained with tests at 100,000A with very current limiting devices.
Which fuses are Best?
Tests show that current - limiting fuses are the best choice for the protection of motor controllers if damage - free performance is required. In
particular, Ferraz Shawmut AJT (Class J) and A6D (Class RK1) fuses are ideally suited for this application. These current - limiting fuses will clear a
short circuit within their current - limiting range in less than ½ cycle and prevent the fault current from reaching its first peak.
More on Reverse
Phone: 978-462-6662 Fax: 978-462-0181 us.ferrazshawmut.com
➤
Facts About Type 2 Continued...
Type 2 Protection
Fuses for Type 2 Coordinated Protection of Motor Starters
The fuses shown are UL Listed for branch circuit protection and have been proven in third party laboratory tests to meet the requirements of IEC
947-4-1 by motor control manufacturers. To properly select these fuses for Type 2 protection of motor starters, refer to the individual selection tables
available from Ferraz Shawmut. The data in these tables has been obtained from the manufacturers or their web sites for your convenience. These
tables are also available on our web site at www.us.ferrazshawmut.com. Also, refer to the Application Section of the Advisor for more information on
selecting fuses for motor circuits.
Amp-Trap 2000® AJT Class J Fuse
Starter manufacturer’s testing has proven that the AJT’s lower let-thru energies provide Type 2 protection of NEMA- and
IEC- style starters. The ideal choice for new applications of 600 amps and less, the AJT offers excellent current-limiting
performance for short circuits and time delay for reliable operation in the presence of temporary overloads. The unique Class J
dimensions prevent improper substitutions.
Amp-Trap 2000® A6D Class RK1 Fuse
When it comes to upgrading existing applications of 600 amps and less there is no better alternative than the A6D. Starter
manufacturer’s testing has proven that the A6D’s low current-limiting let-thru energies provide Type 2 protection of NEMA - style
starters. The time delay feature ensures reliable operation in the presence of temporary overloads. Its dimensions allow for
direct replacement of existing Class H, Class K and Class RK5 fuses.
Amp-Trap 2000® ATDR Class CC Fuse
Often a good choice for motor circuit applications with motor full load amps of 15 amps and less, ATDR’s current-limiting
performance can provide Type 2 Protection of NEMA- and IEC- style starters. Consult sizing tables as Class CC fuses do not
have as much time delay for overloads as the AJT. Advantages of using Class CC include its small footprint fuse block and
rejection feature that prevents improper substitutions.
Disclaimer: Regarding information available in this document, Ferraz Shawmut, Inc. does not warrant or assume any legal liability or responsibility for the accuracy or usefulness of
any information disclosed. The content in this guide is for informational purposes only. All information has been gathered from the individual websites of the product manufacturers
listed in this document.
Phone: 978-462-6662 Fax: 978-462-0181 us.ferrazshawmut.com