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CTV-PRB004-EN

Medium-Voltage Starter Types (2,300–6,600 Volts)

8. The S contacts open to open the autotransformer circuit.

9. The autotransformer is now connected as a series reactor with the motor.

10. Now, a secondT interlock and a second S interlock both close to energize the run contactor (2M).

11. The 2M contacts close to bypass the transformer and connect the compressor motor directly

to the line.

Standard features

•

Control-power transformer

•

Primary and secondary current transformers (CTs)

•

Potential transformers (PTs)

•

Grounding provisions

•

Bolted line-power connections

•

Bolted load-side connections for remote starters

•

Standard motor protection

Environmental specification

•

Designed, developed, and tested in accordance with UL 347

•

NEMA 1 enclosure as standard

•

Operation from sea level to 6,000 ft (1,829 m)

•

Operating ambient temperature range 32°F to 104°F (0°C to 40°C)

•

Relative humidity, non-condensing 5% to 95%

•

Non-operating ambient temperature range -40°F to 158°F (-40°C to 70°C)

•

Voltage utilization range ±10%

Figure 31. Simplified autotransformer wiring diagram

LINE

VOLTAGE

AUTO-TRANSFORMER

CPT

TRANSITION

START-

STOP

50%

80%

65%

100%

MOTOR

CTV-PRB004.book Page 39 Sunday, December 18, 2011 6:39 PM

Содержание CDHF

Страница 1: ...edge and training Improperly installed adjusted or altered equipment by an unqualified person could result in death or serious injury When working on the equipment observe all precautions in the liter...

Страница 2: ...and HFCs Responsible Refrigerant Practices Trane believes that responsible refrigerant practices are important to the environment our customers and the air conditioning industry All technicians who ha...

Страница 3: ...nical and chemical hazards Before installing servicing this unit technicians MUST put on all Personal Protective Equipment PPE recommended for the work being undertaken ALWAYS refer to appropriate MSD...

Страница 4: ...ine 2 3 6 6 kV 32 Across the Line Starter 2 300 6 600 volts 32 Medium Voltage Primary Reactor 2 3 6 6 kV 35 Primary Reactor Starter 2 300 6 600 volts 35 Medium Voltage Autotransformer 2 3 6 6 kV 38 Au...

Страница 5: ...onnect Means 52 Short Circuit Interruption 53 Power Circuit Requirements 54 Electrical System Power Wire Sizing 56 Starter Options 61 Multiple Starter Lineups 2 300 6 600 volts 61 Industrial Grade Sta...

Страница 6: ...ad wires The medium voltage starter submittals show conduit space for alternate wiring options Additional wiring options may be available For your convenience power wire sizing charts for various volt...

Страница 7: ...oltage Unit Mounted Adaptive Frequency Drive p 25 and Medium Voltage Remote Mounted Adaptive Frequency Drive p 42 It will be classified as a starter type for the purposes of this document Several volt...

Страница 8: ...num bars that are die cast into slots in the rotor The aluminum bars are connected at each end by a continuous ring This skeleton of rotor bars with end rings looks like a squirrel cage and gives the...

Страница 9: ...essible In some cases higher voltage chillers allow for the elimination of electrical components with their associated space requirements and energy losses In particular chiller installations with on...

Страница 10: ...l rated capacity i e the motor size The FLA is not available from the chiller selection program but it can be obtained from motor data sheets upon request B Primary power kW The primary power is the p...

Страница 11: ...cable sizes and conduits are discussed in Electrical System PowerWire Sizing p 56 If the AFD is a remote free standing AFD the MCA will be based on the compressor motor RLA G Maximum overcurrent prot...

Страница 12: ...UHHQ 6HDO FHUWLILFDWLRQ 8QLW PRXQWHG ORZ YROWDJH SSOLFDWLRQ W SH 6WDQGDUG FRROLQJ 0 K 8QLW KHDW UHMHFWHG WR DPELHQW 0 K KHDW UHMHFWHG WR DPELHQW YDSRUDWRU QIRUPDWLRQ YDS OHDYLQJ WHPS YDS SUHVVXUH GURS...

Страница 13: ...al b Standard N A N A Long acceleration Standard Standard N A N A Maximum number of starts Standard Standard N A N A Momentary power loss distribution fault Standard N A N A N A Motor overload Standar...

Страница 14: ...At startup the standard overload protection is bypassed for the starter s acceleration time or until the motor is up to speed Refer to Figure 5 p 15 for the chiller controller s overload time to trip...

Страница 15: ...tor acceleration Maximum allowed acceleration times per the AdaptiView unit controller are listed in Table 4 Motor overheat protection The unit controller monitors the motor winding temperatures in ea...

Страница 16: ...ion and shuts the chiller down backwards rotation Under overvoltage protection The chiller is shut down with an automatic reset due to excessive line voltage 10 percent of the design voltage Short cyc...

Страница 17: ...savings Applications that favor the use of an AFD exhibit increased operating hours at reduced condenser water temperatures and high energy costs However it is important to recognize that all variable...

Страница 18: ...lly set up in a wye or star configuration then it transitions to a delta configuration during the starting sequence To illustrate a typical starting sequence using a generic non Trane schematic refer...

Страница 19: ...8 A 1A interlock now opens to de energize the S contactor 9 The S contacts open to connect the resistors and motor windings in series in the delta configuration 10 An S interlock closes to energize th...

Страница 20: ...used for 640 to 1 700 amp starters with no disconnect The three door size is used for 1 385 to 1 700 amps when disconnects are included Figure 8 Unit mounted WD Figure 9 Remote 1 door WD Figure 10 Re...

Страница 21: ...ested in accordance with UL 508 NEMA 1 enclosure as standard Operation from sea level to 6 000 ft 1 829 m Operating ambient temperature range 32 F to 104 F 0 C to 40 C Relative humidity non condensing...

Страница 22: ...ate pulses are originally applied late in the half cycle and then gradually applied sooner in the half cycle If the gate pulse is applied late in the cycle only a small increment of the wave form is p...

Страница 23: ...ontactor rated to carry 100 percent of the full load motor phase current Protection from shorted SCRs and high starter heatsink temperature Protection from transient voltage through resistor capacitor...

Страница 24: ...m Operating ambient temperature range 32 F to 104 F 0 C to 40 C Relative humidity non condensing 5 to 95 Non operating ambient temperature range 40 F to 158 F 40 C to 70 C Voltage utilization range 10...

Страница 25: ...source pulse width modulated PWM design It consists of three primary power sections as shown in Figure 17 the active rectifier the DC bus and the inverter Rectifier active Takes incoming AC power fil...

Страница 26: ...overload capability of 100 percent continuous to 150 percent for five seconds Note For voltages other than 460 480 V a transformer is currently needed to produce 460 480 V Motor thermal overload prote...

Страница 27: ...trolled through theTracer AdaptiView include Current limited to 100 percent Motor overload protection Motor over temperature protection Phase loss phase reversal and phase imbalance protection Undervo...

Страница 28: ...entire system not specifically to any one load or product IEEE 519 establishes requirements at the point of common coupling PCC where the building connects to the utility system The standard contains...

Страница 29: ...ps and enclosure short circuit rating of 65 000 amps standard UL CUL listed as a package Simple front access only design 460 480 60 3 input power 10 percent 575 600 60 3 input power 10 percent Minimum...

Страница 30: ...ints are digitally displayed at the chiller controller Frequency command Input line voltage Load side amps Harmonics The remote AFD is a standard six pulse design Therefore the harmonic level is 35 pe...

Страница 31: ...er Lineups 2 300 6 600 volts p 61 Remote mounted starters fromTrane can have special NEMA options whereas unit mounted starters are NEMA 1 All starters conform to ANSI NEMA ICS 6 enclosure standards u...

Страница 32: ...top hat that is shown in our as built submittal drawings The top hat is enclosed in the starter cabinet during shipment and then reversed for field installation Motor terminal boxes and remote mounted...

Страница 33: ...mary and secondary current transformers CTs Potential transformers PTs Figure 23 Simplified across the line wiring diagram Figure 24 Unit mounted across the line starter dimensions LINE VOLTAGE ACROSS...

Страница 34: ...rd Operation from sea level to 6 000 ft 1 829 m Operating ambient temperature range 32 F to 104 F 0 C to 40 C Relative humidity non condensing 5 percent to 95 percent Non operating ambient temperature...

Страница 35: ...signal from the chiller controller energizes the pilot relay PR 2 The PR contacts close to energize the start contactor 1M 3 The 1M contacts close to connect the compressor motor to the line with the...

Страница 36: ...UL 347 NEMA 1 enclosure as standard Operation from sea level to 6 000 ft 1 829 m Operating ambient temperature range 32 F to 104 F 0 C to 40 C Relative humidity non condensing 5 to 95 Non operating am...

Страница 37: ...terTypes 2 300 6 600 Volts Figure 28 Remote mounted reduced voltage starter dimensions Figure 29 Reduced voltage unit mounted starter dimensions 72 30 80 9 13 60 20 38 26 2 27 40 Top Hat Reduced Volta...

Страница 38: ...troller energizes the pilot relay PR 2 The pilot relay contacts close to energize the shorting contactor S 3 The S contacts close to complete the autotransformer circuit 4 An S interlock closes to ene...

Страница 39: ...ial transformers PTs Grounding provisions Bolted line power connections Bolted load side connections for remote starters Standard motor protection Environmental specification Designed developed and te...

Страница 40: ...bility lowest inrush and still meet the 30 year life expectancy Over the years solid state starters have been available however when the pros and cons are evaluated a traditional electro mechanical is...

Страница 41: ...age StarterTypes 2 300 6 600 Volts Figure 32 Top Hat placement for shipment and installation Stowed for Shipment Installed for Stress Cones Sheet Metal Top Hat Section allows space for shielded cable...

Страница 42: ...nd a lockable non load break isolation switch as standard The fuses are installed via fuse clips and can be replaced without special tools An integral common mode choke with iron core eliminates the n...

Страница 43: ...The chiller unit control panel capabilities provide for the control configuration interface to and the retrieval display of AFD related data AFD standard design features controlled throughTracer Adap...

Страница 44: ...ufacturer s requirement Consult local codes Refer to the AFD installation operation and maintenance manual AFDJ SVU01A EN Installation Operation and Maintenance Remote Mounted Medium Voltage Air Coole...

Страница 45: ...PFCCs are required the dimensions will further increase because the capacitors require their own separate enclosure All starters are NEMA 1 rated as standard and conform to ANSI NEMA ICS 6 enclosure...

Страница 46: ...emote mounted across the line dimensions Figure 35 Remote mounted 11 kV across the line starter 1 Current limiting power fuses 2 Isolation switch provision for one lock 3 Control power transformer 4 V...

Страница 47: ...r remote mounted primary reactor starters are shown in Figure 36 p 47 PFCCs if required are housed in a 36 inch wide auxiliary cabinet not shown Always consult the submittal drawings for as built dime...

Страница 48: ...remote mounted autotransformer starters are shown in Figure 37 p 48 PFCCs if required are housed in a 36 inch wide auxiliary cabinet not shown Always consult the submittal drawings for as built dimen...

Страница 49: ...igure 39 p 52 for the reference points or label locations of each rating AFC is the calculated potential short circuit current at a point just upstream of the starter It is calculated by the electrica...

Страница 50: ...e assembled starter enclosure has an SCCR The short circuit current rating is the maximum fault current that the starter withstood during testing by Underwriters Laboratories Inc UL 508 defines the sh...

Страница 51: ...at passes through the circuit breaker before the circuit breaker trip element has time to respond typically equal to or less than the available fault current and lasting three quarter of an electrical...

Страница 52: ...ck i e main lug only connection An optional non fused disconnect switch in a molded case as shown in Figure 40 can be installed These non fused disconnect switches typically have locking provisions to...

Страница 53: ...uit while under load a load break disconnect switch may be furnished as a special option on medium voltage starters The load break switch is mounted in an additional section of the starter cabinet ass...

Страница 54: ...propriate submittal drawings for the starter short circuit current rating Note Don t confuse short circuit current rating SCCR with silicone controlled rectifier SCR utilized in solid state starters a...

Страница 55: ...elta 208 600 V 33 27 33 Solid State 208 600 V 45 27 33 X Line 2 3 13 8 kV 100 6 100 Primary Reactor 2 3 13 8 kV 65 16 42 Autotransformer 2 3 13 8 kV 45 16 42 AFD 460 600 V 13 12 Varies Table 10 Motor...

Страница 56: ...uency drive across the line autotransformer or primary reactor starters must be in multiples of three Wire for these starters is sized following the procedure used for sizing supply wire from the dist...

Страница 57: ...e starter are sized using Table 11 p 58 Comparing the MCA to the table values indicates the conductors could be any of the following combinations one conduit containing three 600 MCM conductors one co...

Страница 58: ...10 350 310 496 620 930 992 1240 1550 1860 400 335 536 670 1005 1072 1340 1675 2010 500 380 608 760 1140 1216 1520 1900 2280 600 420 672 840 1260 1344 1680 2100 2520 a Based on 2011 NEC Table 310 15 B...

Страница 59: ...remote mounted across the line primary reactor autotransformer and Adaptive Frequency Drives Value in table must be larger than the MCA to use the wire combination a Based on 2011 NEC Table 310 15 B...

Страница 60: ...r and load side wiring between the starter and the motor Value in table must be larger than the MCA to use the wire combination Table 16 MCA look up table for 90 C copper conductors rated for 5 001 35...

Страница 61: ...Hz from 4 800 to 6 600 volts NEMA 12 NEMA 3R or NEMA 4 enclosures remote starters only Wattmeter Watt hour meter add for demand register and pulse initiator Watt transducer Current transducer Voltage...

Страница 62: ...above however it uses what is called an auxiliary section that allows the customer to bring wires in from the bottom to power the main bus Figure 43 Top entry multiple across the line starter arrangem...

Страница 63: ...NEMA 12 960 amps Flanged disconnect 100 000 amps short circuit current rating SAE HS 1738 Up to 600 volts High fault remote wye delta starters HRWD NEMA 1 961 to 1 600 amps Non flanged disconnect 85...

Страница 64: ...onduits and junction boxes The Enhanced Electrical Protection Package control panel also includes some additional installation features and layout improvements The purge is also upgraded to NEMA 4 con...

Страница 65: ...y of control response ease of maintenance Enhanced Electrical Protection Package Purge NEMA 4 construction Seal tight conduits Sealed motor terminal box Totally Enclosed Fan Cooled TEFC pumpout motor...

Страница 66: ...at the chiller controller and atTracer Summit The high bearing temperature cutout is fixed at 180 F 82 2 C If either bearing temperature violates the cutout a latching manual reset diagnostic is gene...

Страница 67: ...nhanced Electrical Protection Package and SMP option on customer supplied starters SBO Most of the accommodations that would need to be met by the customer who wishes to use a non Trane starter are pr...

Страница 68: ...ter manufacturer because generic or existing starters are not compatible with theTrane chiller control panel Non Trane starters must be modified with the proper components and control wiring before th...

Страница 69: ...tion startup long term support and will not maintain records or drawings for the resulting starter Power Factor and CenTraVac Chiller Motors CenTraVac squirrel cage induction motors normally have an u...

Страница 70: ...information from the motor data sheets without adjustments at 60 and 50 Hz Contact yourTrane sales representative for more information PFCC Application Guidelines Three rules govern the application of...

Страница 71: ...ler motor operating at full load Failure to comply with this rule can cause significant damage due to voltage regeneration The manufacturers of CenTraVac chiller motors place maximum limits on both th...

Страница 72: ...do not remain connected to the motor or the line when the motor is disconnected This configuration prevents voltage feedback problems and can be used for cases where correction beyond 95 percent is de...

Страница 73: ...nd thermal expansion coefficients Greater care in connecting aluminum wire is required since an aluminum oxide film must be removed or penetrated before a reliable aluminum joint can be made This oxid...

Страница 74: ...ects or circuit breakers Low voltage starters with terminal blocks require a special configuration which is available as a standard option in the order system On medium voltage the standard UL certifi...

Страница 75: ...e for manually isolating an electrical circuit Distribution fault Transient power losses longer than 2 or 3 cycles will be detected and cause the chiller to shut down typically within 6 cycles The chi...

Страница 76: ...setting of the ground fault protection system should be 20 percent of the disconnect rating with a 10 cycle time delay Grounding Electrical refrigeration components such as motors and control panels...

Страница 77: ...t Trane to provide a load break switch The standard isolation switch that comes with medium voltage starters is non load break The load break switch is a design special The switch is housed within a 9...

Страница 78: ...intended for indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain splashing water hose directed water and damage from external ice formation NEMA 4X Enclos...

Страница 79: ...ry rated load amps RLA p 74 R Rated load amps or running load amps RLA See Amps primary rated load amps RLA p 74 Relay An electrically operated device whose contacts switch electrical circuits A relay...

Страница 80: ...ay be used alone they are usually used in conjunction with lightning arresters See Lightning arrester p 77 Surge capacitors are a starter option Switchgear A switchgear type starter is an across the l...

Страница 81: ...ection as standard Voltage monitoring relays adjustable undervoltage relay A relay and an adjustable line voltage monitor that will stop a chiller if line voltage drops below a preset value This under...

Страница 82: ...controls and HVAC systems comprehensive building services and parts For more information visit www Trane com Trane has a policy of continuous product and product data improvement and reserves the righ...

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