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MANUAL MOTOR STARTER GUIDE

APRIL 19

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7.2.10 Additional current limiting devices

In addition to transformers, other devices, such as some types of fuses and circuit-breakers, also serve to limit the
available fault current within a facility. The published let-through energy I

2

t and peak let-through I

p

can be used to

determine the load-side available fault current. The higher of these two ratings is the available fault current beyond
the device.

Using our example above, we know that our facility has a maximum available fault current of 63 kA. Let’s assume that
for a 63 kA fault at 480 V AC, a current-limiting circuit-breaker as has an I

2

t of 30 kA²s, and an I

p

of 27 kA. The available

fault current downstream from this circuit-breaker is 30 kA.

In this example, the required SCCR for all components installed beyond this circuit-breaker must be equal to, or
greater than, 30 kA at 480 V AC.

7.3 Defining branch circuits

Electrical distribution within a facility requires the coordination of many circuits to loads. Beyond the point of the
service entrance, all circuits leading away are considered feeders or feeder taps, until just ahead of a load. The circuit
between the load-side terminals of the final overcurrent protective device and the load itself is called the branch cir-
cuit. This also means that the branch circuit protective device is actually part of the feeder circuit, not the branch.
The figure below shows an example of this.

Feeder vs. branch circuits

Figure 36: Defining branch circuits.

Manual motor starters are suitable for branch circuit protection when tested as Type E or F combination motor con-
trollers. However, these devices cannot be used for providing protection of feeder circuits. Feeder circuit protection
is typically provided using either fuses, UL 489 / CSA C22.2 No.5 molded case or UL 1066 / CSA C22.2 No.31 power
circuit-breakers.

The term “branch circuit’ applies regardless of the type of load. Common load types for industrial and commercial
applications include motors, heaters, and lamps. The requirements for motor branch circuits are more intense than
other load types, so the following section reviews these requirements in detail.

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Содержание MO132

Страница 1: ... MANUAL MOTOR STARTER GUIDE Manual motor starter MS116 MS132 and MS165 ...

Страница 2: ...s handbook is written with the aim of being a general guide for people working with manual motor starter appli cations but also for those who are simply interested in learning more about the products standards and applications All these are relevant for European applications based on IEC and North American applications UL CSA The handbook is neither a complete technical guide nor a manual for all ...

Страница 3: ...al voltage Ue 17 2 2 2 Rated short circuit making capacity Icm 17 2 2 3 Rated short circuit breaking capacity 17 2 2 4 Rated short time withstand current Icw 17 2 2 5 Selectivity categories 18 2 2 6 Ambient air temperature compensation 18 2 2 7 Temperature rise of the manual motor starter 19 2 2 8 Trip free mechanism 20 2 2 9 Phase loss sensitivity 20 2 2 10 Mechanical and electrical durability 20...

Страница 4: ...ertification marks 53 7 1 2 Joint U S Canadian approvals 54 7 1 3 Relevant North American standards 54 7 1 4 Global harmonization efforts 55 7 1 5 Categorizing manual motor starters 55 7 1 6 Selecting the right Short Circuit Current Ratings SCCR level for your UL application 57 7 2 North American voltage supply networks and load types 58 7 2 1 North American voltages 58 7 2 2 Three phase network c...

Страница 5: ...MANUAL MOTOR STARTER GUIDE APRIL 19 5 80 7 6 1 Defining Manual Motor Controllers NLRV 66 7 6 2 Defining Combination Motor Controllers NKJH 72 8 Glossary 76 9 Appendix 78 ...

Страница 6: ...ing ever stronger It has been estimated that around 300 million electric motors are installed today with an annual growth rate of more than 5 percent Furthermore it has been estimated that electric motors account for about 65 percent of the electricity con sumed in industrial applications ABB is not only a long standing advocate of the need for high efficiency in motors and its policy is to offer ...

Страница 7: ... over current locked rotors long starting or braking times changes of the friction ratio of the operated engine non permissible intermittent operations long term overloads in continuous operation undervoltage Supply problems which could cause unsymmetrical over currents earth faults phase loss phase unbalance on the supply side interwinding or interturn fault within the motor Cooling problems redu...

Страница 8: ...g the Low Voltage Directive 2014 35 EU and it is allowed to apply the CE marking on the product EN 60947 4 1 is the harmonized standard for manual motor starters and it is identical to IEC 60947 4 1 The same applies to the EN 60947 2 EN 60947 1 for the accessories the EN60947 5 1 In this case the CE marking does not cover the Machinery Directive Directive 2006 42 EC which requires a special verifi...

Страница 9: ...r This creates a risk of an explosion The amount of a substance needed to create an explosive atmosphere depends on the substance in ques tion The area where this possibility exists is defined as a potentially explosive atmosphere These atmospheres can be found throughout industries from chemical pharmaceutical and food to power mining and wood processing The areas may also be known as hazardous a...

Страница 10: ...ccepted as an alternative system in North America Authorities normally determine the area but it can also be performed by a third party a notified body or other ex pert It is the owner s responsibility to ensure that the classification of their site is performed before suitable products can be selected and installed at the location Globally a zone system is used to classify potentially explosive a...

Страница 11: ... Very high The zone classification is not used in mines I Mines M1 Mb High M2 II Gas Ga Very high 0 II Surface 1G Gb High 1 2G Gc Enhanced 2 3G III Dust Da Very high 20 1D Db High 21 2D Dc Enhanced 22 3D Table 1 Select the device type according to the zone and category EPL 1 7 8 Manual motor starters in potentially explosive atmospheres Manual motor starters e g MS132 and MS165 are authorized unde...

Страница 12: ...ents Electromechanical Control Circuit Devices Standards for Canada Title CSA C22 2 No 60947 1 formerly CSA C22 2 No 14 Low voltage switchgear and controlgear Part 1 General rules CSA C22 2 No 60947 4 1 formerly CSA C22 2 No 14 Low voltage switchgear and controlgear Part 4 1 Contactors and motor starters Elec tromechanical contactors and motor starters Standards for China Title GB T14048 2 Low vol...

Страница 13: ...to the load side circuits and motor by operating within milliseconds following a short circuit fault The term manual motor starter is not directly stated in either standard with the terms for the UL Manual Motor Controller or Combination Motor Controller used as these terms refer to these devices For the International Elec trotechnical Commission IEC these devices are referred to as motor protecti...

Страница 14: ...een overloads and short circuits by means of separate signaling does not apply to the MS116 2 1 2 Time current characteristics tripping characteristics Tripping times in accordance with the harmonized IEC 60947 4 1 UL 60947 4 1A and CSA C22 2 No 60947 4 1 stand ards can be seen in the figures below The tripping characteristics of the inverse time delay thermal over current release applies for dire...

Страница 15: ... disconnect the load from the grid in each of short circuits thus preventing further damage With a short circuit breaking capacity up to 100 kA at a voltage of 400 V AC the manual motor starter is considered to be short circuit proof if higher short circuit currents are not to be expected at the installation site of the devices 2 1 5 1 Short circuit coordination The main task of the short circuit ...

Страница 16: ...amage motors and other loads Manual motor starters are designed to detect these conditions and trip to prevent load side circuit and motor damage 2 1 7 Single phase and direct current DC loads In order for manual motor starters to protect single phase loads or direct current DC loads all three main poles must be connected in series see figures below Figure 4 Connection diagram for single phase and...

Страница 17: ...can repeatedly interrupt without being damaged After the short circuit interruption the manual motor starter is able to carry the rated oper ational current and to trip in the case of an overload 2 2 3 3 What are the difference between the rated ultimate short circuit breaking capacity Icu and rated service short circuit breaking capacity Ics The difference between rated ultimate short circuit bre...

Страница 18: ...ue short time withstand current rating according to standard 2 2 6 Ambient air temperature compensation Ambient air temperature compensation is realized by utilizing a bimetal which counteracts the working bimetals of the inverse time delay thermal over current release This second bimetal is not heated by the motor current but bends only under the influence of the ambient air temperature As a resu...

Страница 19: ... devices of small dimensions but not exceeding by more than 10 K the values of this table Table 4 Table 2 from IEC 60947 1 Temperature rise limits of terminals Accessible parts Temperature rise limits a in Kelvin K Manual operating means Metallic Non metallic 15 20 Parts intended to be touched but not hand held Metallic Non metallic 30 40 Parts which need not be touched during normal operation b E...

Страница 20: ...symmetrically loaded on all three poles to prevent early tripping due to phase loss sensitivity In order to protect single phase or direct current devices all three main poles have to be connected in series see also Chapter 2 1 7 Single phase and direct current DC loads 2 2 10 Mechanical and electrical durability Due to product design characteristics manual motor starters vary in regard to the num...

Страница 21: ...onducted high short circuit resistance but not switched off 2 3 4 Disconnect switch The disconnect switch is a mechanical switching device that in the open position meets the requirements specified for the disconnection function IEC 60947 1 The disconnection function is to switch off the power supply to the en tire system or part of the system whereby the system or part of the system is disconnect...

Страница 22: ...F TRIP ON OFF TRIP ON OFF TRIP Magnetic trip indication X X X Lockable handle without accessories X X X Disconnection function X X X X Width 45 mm 45 mm 55 mm 45 mm Rated operational current Ie 0 1 32 A 0 1 32 A 10 80 A 0 1 25 A Short circuit breaking capacities up to 100 kA up to 100 kA up to 100 kA up to 100 kA Ambient air temperature w o derating 25 55 C 25 60 C 25 60 C 20 60 C MO132 MO165 Ther...

Страница 23: ... For small cable cross sections or for cables without ferrules simply push a screwdriver into the clearly marked holes to open the terminal Also this device has thermal and electromagnetic protection for rated operational currents Ie from 0 10 to 32 A Like the MS116 and MS132 the MS132 K offers motor protection up to 15 kW 400 V AC and has a module width of 45 mm 2 4 3 MS165 The MS165 are manual m...

Страница 24: ... Current limiters S803W Reducing in stallation time and saving space Three phase busbar PSx Feeder in feed terminal blocks S1 Mx Connecting Link BEA External oper ation and enclosures Handles and shafts NEMA Types 1 3R 12 Shaft alignment accessories Door mount kits NEMA Type 12 DMS132 Enclosures NEMA Type 12 IB132 Auxiliary and signaling contacts can be combined to provide external status indicati...

Страница 25: ...One AA1 shunt trip or one UA1 undervoltage release on the left side The maximum capacity for MS132 or MS165 Figure 7 The maximum capacity for MS132 or MS165 One front mounting auxiliary HKF1 contact Two accessories mounting on the right one SK1 signal contact alarm and one auxiliary HK1contact or two auxiliary HK1 contacts or one short circuit CK1 indicator and one SK1 signal contact alarm or one ...

Страница 26: ...tact While HK1 11 and HKF1 11 have an opening and a closing contact HK1 20 and HKF1 20 have just two NO contacts 2 4 6 3 Signaling contacts SK1 and CK1 Signaling contacts signal the tripping of the manual motor starter with the protruding orange button The SK signal ing contact signals tripping regardless if it was caused by short circuit or an overload The CK signaling contact signals tripping in...

Страница 27: ...tage release UA1 The UA1 under voltage release releases the manual motor starter or prevents it from being switched on when its volt age supply is interrupted This can be used in emergency switching circuits or can prevent an automatic restart after voltage interruption The basic IEC 60947 1 standard defines the following limits of operation for under voltage releases When 35 of the rated voltage ...

Страница 28: ...erminals for 25 mm2 and 35 mm2 rated cross sections Between 2 and 5 manual motor starters with none one or two lateral auxiliary contacts can be connected MS165 and MO165 use three phase busbars for 125 A Two three or four manual motor starters with none one or two lateral auxiliary contacts can be connected 2 4 6 7 Handles and shafts With this solution utilizing a door coupling rotary mechanism i...

Страница 29: ...es motors starting plugging 1 inching 2 dynamic braking of motors AC 1 General use AC Resistance Air Heating 100 000 electrical cycles AC Motors Elevator control AC Motors 500 000 electrical cycles AC 5a Electric discharge lamps ballast AC 5b Incandescent lamps tungsten AC 8a Hermetic refrigerant compressors DC 1 General use DC Motors Table 10 Load types 3 1 General use and heaters The harmonized ...

Страница 30: ...perly protected There are many different manufacturers represented on the market selling at various prices Not all motors have the same performance and quality as motors from ABB for example High efficiency enables significant savings in en ergy costs during the motors normal endurance In the IEC 60034 30 standard for rotating electrical machines four different efficiency classes have been defined...

Страница 31: ... of protection against water The end of the motor is defined in the IEC standard as follows The D end is normally the drive end of the motor The N end is normally the non drive end of the motor Figure 13 Inside a motor with all the main components 3 2 2 Squirrel cage motors The squirrel cage motor is the most common type of motor on the market It is relatively cheap and the maintenance costs are u...

Страница 32: ...iency value must be shown on the motor rating plate and in the product documentation The documentation must clearly indi cate the efficiency testing method used as different methods can produce differing results 3 2 3 1 Minimum energy performance standards While the IEC as an international standardization organization sets guidelines for motor testing and efficiency clas ses the organization does ...

Страница 33: ...4 30 1 covers the power range from 0 12 kW up to 1000 kW Most of the different technical constructions of electric motors are covered as long as they are rated for direct on line operation The coverage of the standard in cludes Single speed electric motors single and three phase 50 and 60 Hz 2 4 6 and 8 poles Rated output PN from 0 12 kW to 1000 kW Rated voltage UN above 50 V AC up to 1 kV Motors ...

Страница 34: ...isting AC 3 utilization category unchanged Squirrel cage motors starting switching off motors during running reversing AC 3 AC 3e Refer to the asynchronous motor of designs N and H according to IEC 60034 12 2016 Refer to the asynchronous motor of designs NE and HE according to IEC 60034 12 2016 with extended higher locked rotor apparent power and current than design N and H respectively to achieve...

Страница 35: ...et leader ABB offers the largest range of LV motors available It has long advocated the need for efficiency in motors and high efficiency products have formed the core of its portfolio for many years The core of ABB s process performance range is based on a full range of IE2 and IE3 motors with many available from stock We also supply IE4 motors for additional energy savings 3 2 3 5 Motors for NEM...

Страница 36: ... to 10 s depending on rated power and inertia a steady state current Id This cur rent remains constant as long as the rotor starts revolving its duration depends on the motor s load and design After 0 5 s to 10 s the rotor accelerates and reaches its final speed The current stabilizes to reach the motor s rated current In at full load To be able to offer the best possible starter solutions ABB per...

Страница 37: ...34 30 1 Here is an example of a rating plate Basic information Certification label Efficiency Code IE Number of phases ABB motor type Manufacturing date Insulation class Degree of protection Product code Motor weight IEC Standard In output information Rated operating voltage Frequency Motor rated power Full load speed Rated operating current Power factor Service factor Partial load efficiencies Ro...

Страница 38: ...urrent used by the motor when fully loaded and while up in full speed An unloaded motor will use far less current and an overloaded motor will use more current During a direct on line start the current used by the motor is far higher than the rated current This is usually between 6 13 times the rated current for IE3 motors but it can be more than 10 times the rated cur rent This can be clearly see...

Страница 39: ...ve the apparent power S The ratio between the active power P kW and the apparent power S kVA is known as the power factor and is often designated as the cos ϕ A normal value is between 0 7 and 0 9 When running where the lower value is for small or low loaded motors and the higher for large ones Figure 21 Diagram indicating P Q S and cos ϕ 3 2 8 Torque The starting torque for a motor differs signif...

Страница 40: ... loaded start Manual motor starters are well suited for both the control and protection of motors including high efficiency types Since the tests for IEC utilization category AC 3 and UL CSA AC Motor have yet to be fully harmonized manual mo tor starters carry both ratings to ensure international acceptability For additional information regarding IE3 high efficiency motors please click the Info on...

Страница 41: ... may trigger the short circuit release especially on fast high current limiting circuit breakers Slow circuit breakers are better suited here especially if the short circuit re lease range can be adjusted and set to a higher value or a direct release via short delay is possible Manual motor starters only the MS132 T and MS132 KT for transformer protection are electromechanical protection devices s...

Страница 42: ... for reactive energy correction raising the power factor When capacitors are energized overcurrents of high amplitude and high frequencies 3 to 15 kHz occur during the transient period 1 to 2 ms For more information regarding the control and protection of capacitors please contact ABB ...

Страница 43: ... ambient temperature in regard to manual motor starter tripping is automatically compensated for ABB manual motor starters have an allowable ambient temperature range for single mountings between 25 C to 60 C 50 C for MS116 Correction factors for ambient temperatures up to 70 C and for group mounting are shown below Device Current correction factors for sin gle mounting or group mounting with spac...

Страница 44: ...s not appreciably exceed six times the full load current The diagram below provides guideline values for starts per hour as a factor of the duty ratio ON vs OFF time and the time required to start the motor ta Figure 24 Diagram of the duty cycles and restarting Example for a motor with a duty ratio of 60 percent and a start duration of 1 second 40 starts per hour are acceptable After tripping the ...

Страница 45: ... place with direct current DC Since current limiting circuit breakers do not rely on a current zero crossing to extinguish the arc like contactors they have hardly any re duced switching capacity in the case of DC short circuits compared to alternating current In the case of a DC short circuit the current increase in the first phase is quite comparable to that in the case of al ternating current d...

Страница 46: ...t ABB product for the application the Selected Optimized Coordination SOC web tool will be very useful In order to guarantee the best performance and the longest lifetime devices involved in the applications mentioned above short circuit protection devices contactors overload relays soft starters need to be coordinated The coordination between devices cannot be determined directly tests in power l...

Страница 47: ...or example if you are looking for products for motor protection where a manual motor starter is used as a short circuit protection device in a plant where the rated voltage is 400Vac and the IE3 Motor Rated Power is 2 2kW Figure 27 Screenshot from a example on SOC SOC shows the right protection device for the selected application depending on the coordination type Click on to see the complete tabl...

Страница 48: ...ounting position and minimum distances When mounting the manual motor starters keep the following clearances to grounded or live parts and insulated conduit ducts according to IEC 60947 2 Single installation there must be no directly attached contactor and there is a minimum gap of 9 mm to the left and to the right Group installation the contactor must be mounted directly or the gap to the left or...

Страница 49: ...ood contact quality 6 2 2 Connection cross sections 6 2 2 1 Connection cross sections for screw connection technology The following tables show the permissible conductor cross sections for the main connections and auxiliary conduc tor connections for sizes MS116 MS132 MO132 MS165 und MO165 For MS116 MS116 16 A M3 5 0 8 1 2 Nm 10 12 Ib in ø 5 5 mm Pozidriv No 2 1 2 x 1 4 mm2 1 2 x 0 75 2 5 mm2 1 2 ...

Страница 50: ...ions for screw connection technology for accessories 6 2 2 2 Connection cross sections for push in spring terminal technology The following tables show the permissible conductor cross sections for main connections and auxiliary conductor connections of the MS132K manual motor starter MS132 K MS132 K Push in 1 2 5 mm2 1 6 mm AWG 10 8 1 4 mm 1x 1 4 mm 2x 1 2 5 mm 12 mm MS132 K Spring ø 3 mm x 0 5 mm...

Страница 51: ...and gently push it backwards 2 Result when the manual motor starter trips to TRIP the test has been passed the MS116 trip from I to 0 Figure 32 Overload trip test 6 5 Restart after tripping When the manual motor starter trips the rotary switch goes to the TRIP position to indicate tripping The tripping of the manual motor starter can optionally be signaled using an accessory This can also be done ...

Страница 52: ...dlock bracket diameter 2 5 to 4 5 mm For the MS116 a special accessory is needed to look the switch the SA3 6 7 Installation instructions Installation instructions for manual motor starters can be accessed from the ABB Download Center https li brary abb com All Categories Products Low Voltage Products and Systems Control Product Manual Motor Starters 6 8 2D drawings and 3D models 2D and 3D drawing...

Страница 53: ...c Canadian Standards Association Intertek Testing Services NA Inc Each product certified by an NRTL is given a unique certification mark to indicate conformity which becomes a clear sign to inspectors that the product can be legally and safely accepted Accreditation in Canada is performed by the Standards Council of Canada SCC 7 1 1 Product certification marks Each NRTL product mark is unique and ...

Страница 54: ...all electrical installations beyond the point of the utility service drop Applicable for residential commercial and indus trial structures Often adopted into law by local governments NFPA 70 National Electrical Code NEC United States CSA C22 1 Canadian Electrical Code CEC Canada NOM 001 SEDE 2012 Instalaciones Eléctricas utilización Mexico Application specific standards Govern specific application...

Страница 55: ...s Manual Motor Controllers NLRV Dual categories Combination Motor Controllers NKJH NLRV Listed Manual Motor Controllers certified according to UL 60947 4 1 UL 508 for use in the United States Listed Combination Motor Controllers certified according to UL 60947 4 1 UL 508 for use in the United States NKJH NLRV7 Listed Manual Motor Controllers certified according to CSA C22 2 No 60947 4 1 CSA 22 2 N...

Страница 56: ... protected as described elsewhere in 240 4 A Tap conductor is deﬁned in the NEC 2014 edition electrical code tap rules The NEC article dealing with overcurrent protection of feeder taps is article 240 21 B These rules are often referred to as the NEC tap rules There are five tap rules related to feeder circuit taps Taps not over 3 m 10 ft long Taps not over 7 5 m 25 ft long Taps supplying a transf...

Страница 57: ...n serve as the main branch disconnect when marked Suitable as Motor Disconnect and positioned on the load side of the branch circuit protective device The Motor disconnect SCCR should referenced These ratings ap ply whether the upstream BCPD contains fuses or a circuit breaker unless otherwise noted For panels designed to control multiple branch circuits consider the possibility of a group install...

Страница 58: ... 3 phase 120 V AC 1 phase Industrial and large commercial in the United States 3 phase 3 wire delta 240 V AC 3 phase 3 phase 4 wire wye 480 V AC 3 phase 277 V AC 1 phase 3 phase 3 wire delta 480 V AC 3 phase Industrial and large commercial in Canada 3 phase 4 wire wye 600 V AC 3 phase 347 V AC 1 phase 3 phase 3 wire delta 600 V AC 3 phase Table 22 North American voltages Manual motor starters are ...

Страница 59: ...0Y 277 V 1 MS132 MO132 and MS165 MO165 only Table 23 Straight vs slash voltage ratings 7 2 4 Short circuit current ratings Short circuit current ratings SCCR are tested values for motor control and protection devices to ensure safe reac tion during short circuits and ground faults Since even low level faults are capable of producing incredible amounts of energy unprotected equipment can easily cau...

Страница 60: ...1 and is intended for reference only The standard fault value is also the assumed rating for unmarked components IEC refers to standard fault current as a prospective current r 7 2 7 High fault ratings Optional The standard fault values shown in the previous chapter are the minimum requirements for all motor control compo nents Since the available fault current for a given installation can vary dr...

Страница 61: ... manual effort e g with a screwdriver Both the overload tripping performance and controller switching capabili ties are verified following the short circuit test 7 2 9 Calculating the available fault current for a facility What rating do I need The necessary short circuit current rating for any device is determined based on the available fault current at its point of installation Most industrial a...

Страница 62: ...ordination of many circuits to loads Beyond the point of the service entrance all circuits leading away are considered feeders or feeder taps until just ahead of a load The circuit between the load side terminals of the final overcurrent protective device and the load itself is called the branch cir cuit This also means that the branch circuit protective device is actually part of the feeder circu...

Страница 63: ...489 CSA C22 2 No 5 UL 60947 4 1 CSA C22 2 No 60947 4 1 3 Control means Contactors Softstarters Variable fre quency drives Non fusible disconnect switches Manual mo tor starters Combination Mo tor Controllers UL 60947 4 1 CSA C22 2 No 60947 4 1 UL 60947 4 1 CSA C22 2 No 60947 4 1 UL 508C CSA C22 2 No 274 UL 60947 4 1 CSA C22 2 No 60947 4 1 UL 60947 4 1 CSA C22 2 No 60947 4 1 UL 60947 4 1 CSA C22 2 ...

Страница 64: ...e type of application customers can select from a wide variety of motor control options avail able from ABB One critical aspect for selection is to ensure that the control means is properly rated for the type of load to be controlled in this case AC Motor or DC Motor ratings Not all controllers are suitable for use in motor applications Additionally it is important to consider the electrical durab...

Страница 65: ...by product type Rating Manual motor starter type MS116 MS132 MS165 MO132 MO165 Manual Motor Controller X X X X X Manual Motor Controller Suitable as Motor Dis connect X X X X X Manual Motor Controller Suitable for use in Group Installations X X X X X Manual Motor Controller Suitable for Tap Conduc tor Protection in Group Installations X X X X Manual self protected Combination Motor Con troller Typ...

Страница 66: ...lly be provided with the following functions An instantaneous trip element for short circuit protection not suitable for branch circuit protection without further testing Motor overload protection Suitability for motor disconnecting means on the load side of the branch circuit protective device Suitability for tap conductor protection in group installations These additional functions are considere...

Страница 67: ...cations They can either be enclosed or provided with accessories for flush mounting directly to a wall or panel door The examples in the figure below show manual motor starters applied as non combination single motor starters In addition to providing the means for motor control and overload protection they can be used as the main branch dis connect when marked Suitable as Motor Disconnect and inst...

Страница 68: ...allic overload relays used today The examples in the figure below show manual motor starters applied in non combination single motor applica tions The use of the additional controller e g contactor allows these starters to be remotely controlled In addition to providing overload protection the manual motor starter can also be used as the main branch disconnect when marked Suitable as Motor Disconn...

Страница 69: ...bles The ABB manual motor starter handles feature a trip free mechanism meaning the device will trip even if the handle is locked in the ON position or held by hand They are capable of being locked in the OFF position directly and acces sory enclosures and through door handles are available that meet the requirements for lock out tag out and are 3x padlock able Manual motor starters provide advant...

Страница 70: ...ull load cur rent If the distance from the BCPD to the individual motor overload protection is not greater than 7 5 meters 25 feet the tap conductors can be reduced to the ampacity of the branch conductors For longer distances the am pacity of the individual load tap conductors must be equal to the branch circuit conductors When the individual load tap conductors are sized less than the branch cir...

Страница 71: ...in Group Installations they are allowed to be sized with and ampacity as low as 1 10 the rating of the upstream group BCPD The conductors between the manual motor starter and the load are sized based on the NEC rules for the load itself and are no longer a factor of the branch circuit conductor ampacity as they are in standard group installations Manual motor starters marked Suitable for Tap Condu...

Страница 72: ...Manual self protected combination controller UL 60947 4 1 Short circuit and ground fault protec tion Fuses UL 248 Motor short cir cuit protector UL 60947 4 1 Control means Magnetic or solid state motor controller UL 60947 4 1 Magnetic or solid state motor controller UL 60947 4 1 Magnetic or solid state motor controller UL 60947 4 1 Magnetic or solid state motor controller UL 60947 4 1 Magnetic or ...

Страница 73: ...CSA C22 2 No 5 circuit breakers A means of visibly differentiating between thermal overload and magnetic short circuit trip so as not to inhibit troubleshooting These requirements can be met using either accessories e g terminal feeder blocks and side mount trip indicators or inherent design features MS165 requires no additional accessories to meet the above criteria MS132 requires only the line s...

Страница 74: ...Combination Motor Controllers increase function ality while still offering customers the benefit of using compact and cost efficient manual motor starters for branch short circuit protection Three component assemblies provide additional benefits including selectable Class 10 20 30 overload protec tion electronic along with a wiring schematic identical to that of a conventional combination starter ...

Страница 75: ...l self protected Combi nation Motor Controllers used in this application The use of manual motor starters for drive protection provides customers with a compact and cost efficient alternative to non resettable semiconductor fuses Protection of ABB Micro drives Branch functional requirements Disconnect means Short circuit and ground fault protection Control means Overload protection Application inf...

Страница 76: ...ter 2 2 4 Rated short time withstand current Icw Ie The tripping characteristic of the instantaneous short circuit releases is based on the rated operational current Ie which in the case of the manual motor starter is the same as the upper value of the setting range IE3 Premium efficiency class for single speed motors according to IEC 60034 30 IE4 Super Premium efficiency class for single speed mo...

Страница 77: ...t is the current drawn by a fully loaded motor at its specified nominal speed Reactive power The power consumed by the motor which is used for the magnetization of the motor RMS Root Mean Square The RMS value of an AC supply is the steady DC equivalent which would convert electrical energy to thermal energy at the same rate in a given resistance SCCR Short Circuit Current Ratings see also Chapter ...

Страница 78: ...perational powers and currents The currents given below concern standard three phase four pole cage motors 1500 r p m at 50 Hz 1800 r p m at 60 Hz These values are given for guidance and may vary according to the motor manufacturer and depending on the number of poles ...

Страница 79: ...7 7 86 0 83 8 89 2 89 6 88 0 86 2 90 9 91 9 90 5 88 3 7 5 86 0 86 0 84 7 83 1 88 1 88 7 87 2 85 3 90 1 90 4 89 1 87 3 91 7 92 6 91 3 89 3 11 87 6 87 6 86 4 85 0 89 4 89 8 88 7 86 9 91 2 91 4 90 3 88 6 92 6 93 3 92 3 90 4 15 88 7 88 7 87 7 86 2 90 3 90 6 89 7 88 0 91 9 92 1 91 2 89 6 93 3 93 9 92 9 91 2 18 5 89 3 89 3 88 6 86 9 90 9 91 2 90 4 88 6 82 4 92 6 91 7 90 1 93 7 94 2 93 4 91 7 22 89 9 89 ...

Страница 80: ...bility ABB is not responsible for the implementation verifica tion and validation of the overall safety system It is the responsibility of the system integrator or other party who is responsible for the overall system and system safety The system integrator or other responsible party must make sure that the entire implementation complies with all relevant standards directives and local electrical ...

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