Kohler PowerWave 9000DPA S2, User Manual

Page 1: ...PowerWAVE 9000DPA S2 30 250 kVA User Manual ...

Page 2: ...TS_619_00 PW9000DPA S2 User Manual 13 3 17 ...

Page 3: ...PA S2 User Manual 13 3 17 Document Control PDF ISSUE DATE REVISION SUMMARY TS_619_00B 19 01 17 Second draft copy TS_619_00C 27 01 17 Third draft copy TS_619_00D 09 03 17 Fourth draft copy TS_619_00 13 03 17 First Issue ...

Page 4: ...e to any misinterpretation of or accidental mistakes in this manual 2017 Uninterruptible Power Supplies Ltd This manual may not be copied or reproduced without written permission of Uninterruptible Power Supplies Ltd USEFUL CONTACTS www upspower co uk UPS Limited web site service upspower co uk Service department booking service fault reporting etc technical upspower co uk Technical queries sales ...

Page 5: ...mponent identification 2 14 2 5 UPS Interface facilities 2 15 2 5 1 Customer Interface Board 2 15 2 5 2 Parallel Interface Board 2 16 2 6 Module control panel 2 16 2 6 1 Module control panel buttons 2 16 2 6 2 Module mimic LEDs 2 17 2 6 3 Power Management Display PMD 2 17 2 7 Warranty 2 21 2 8 Extended Warranty 2 21 2 9 Additional Service Maintenance Support 2 21 Installation 22 3 1 Introduction 3...

Page 6: ...a fully powered down condition 4 42 4 4 How to start the UPS system from the maintenance bypass 4 44 4 5 How to transfer the load to maintenance bypass 4 45 4 6 How to shut down the complete UPS system 4 46 4 7 Operating in on bypass mode 4 47 4 7 1 How to Turn ON the UPS in on bypass mode 4 47 4 7 2 How to Turn OFF the UPS in on bypass mode 4 47 4 7 3 How to transfer between on bypass and on inve...

Page 7: ..._619_00 PW9000DPA S2 User Manual 13 3 17 III Specification 56 8 1 Mechanical Characteristics 8 56 8 2 Input Characteristics 8 57 8 3 Battery 8 57 8 4 Output 8 58 8 5 Standards 8 58 8 6 Environmental 8 59 ...

Page 8: ... IV TS_619_00 PW9000DPA S2 User Manual 13 3 17 ...

Page 9: ... and hazard warnings contained in this manual are read and fully understood WARNING High leakage current Ensure that the UPS has been correctly earthed before you connect the mains power supply WARNING This UPS must not be started up or put into use without having first been commissioned by a fully trained engineer authorised by the manufacturer WARNING All servicing must be performed by qualified...

Page 10: ...pments in power engineering the PW9000DPA S2 represents a completely new generation of transformerless 3 phase UPS System Its advanced double conversion VFI Voltage and Frequency Independent topology responds fully to both the highest availability and environmentally friendly requirements compliant with IEC 62040 3 VFI SS 111 standards The criteria and methods which are used in the design manufact...

Page 11: ...ations monitors electronic test equipment etc No resonance with power factor correction capacitors Decentralised Parallel Architecture DPA The PW9000DPA S2 system features DPA paralleling technology that provides n x redundancy without introducing a single point of failure Each module contains its individual charger and inverter power units bypasses CPUs control panels and separate battery configu...

Page 12: ... An external battery cabinet can also be added to the DPA 50 and DPA 150 models to extended the system s autonomy time if desired Figure 2 1 PW9000DPA S2 Cabinets frames Figure 2 2 PW9000DPA S2 UPS Modules CAUTION All the modules fitted within a cabinet must be of the same rating for example it is not possible to mix 30kVA and 50kVA modules in the same cabinet CLASSIC DPA 50 TRIPLE DPA 150 UPGRADE...

Page 13: ... 2 are usually linked at the cabinet s input power terminal blocks so only one mains supply feed is required The input supplies are unswitched within the UPS cabinet and connected directly to each fitted module Both input supplies are fused within the module F1 F2 however the fuses are internal to the module and not accessible to the operator In the event of a fuse failure the module must be remov...

Page 14: ... 3 4 2 Rectifier 6 The rectifier converts the UPS input mains supply into a regulated DC power source which provides the operating power for the inverter It uses leading edge switched mode techniques which results in a UPS module input power factor of almost unity over its operating range 0 99 at full rated linear load The rectifier can provide 100 inverter power demand over an input voltage range...

Page 15: ...the bypass supply fails altogether the inverter frequency control reverts to a free running oscillator which produces a constant 50Hz or 60Hz UPS output Load on battery If the mains supply fails the rectifier shuts down and the battery provides the DC power source for the inverter The battery voltage is regulated by the booster circuit to ensure the inverter receives a suitable DC input as the bat...

Page 16: ...vide battery charging as shown above Similarly the inverter may have been manually turned OFF or shutdown due to a fault and the INVERTER LED on the module control panel may be either OFF or solid RED Module OFF Maintenance bypass When the UPS module is turned OFF all of its internal power blocks are effectively shut down but the module input power terminals remain live unless the UPS input bypass...

Page 17: ...n output overload the inverter can supply the overload for a limited time depending on its severity and if the permitted time is exceeded the load transfers to bypass The additional power available from the bypass supply will attempt to clear the overload but if it persists it will ultimately rupture the bypass mains supply fuses If the overload condition clears while operating on bypass it re tra...

Page 18: ... the specified full load power and the loss of one module will automatically transfer the load to the bypass supply In a redundant module system the system contains at least one UPS module over and above that required to supply the full load and it is possible to lose a module without transferring the load to the bypass supply or in any way disrupt the UPS output A system operating with a redundan...

Page 19: ...trol Logic UPS Module P06 CHARGER STATIC SWITCH INVERTER RECTIFIER Parallel Control Logic UPS Module P07 CHARGER Parallel Control Logic UPS Module P08 Parallel Control Logic UPS Module P09 Parallel Control Logic UPS Module P10 UPS CABINET 2 STATIC SWITCH INVERTER RECTIFIER Parallel Control Logic UPS Module P01 CHARGER STATIC SWITCH INVERTER RECTIFIER Parallel Control Logic UPS Module P02 CHARGER P...

Page 20: ...4 Battery fuse IA2 Parallel Isolator IA1 Maintenance Bypass Isolator UPS Module JD1 Smart Port RS232 Sub D9P JD7 Module control panel connector RECTIFIER BATTERY EXTERNAL BATTERY CABINET INVERTER STATIC SWITCH BOOSTER CHARGER Bypass Contactor Inv Output Contactor Input Contactor Bypass Mains IA 2 IA 1 F4 F1 F2 F3 UPS MODULE UPS CABINET Static bypass line Maintenance bypass line UPS Input Mains UPS...

Page 21: ... are labelled to identify their associated UPS module e g IA2 2 pertains to module 2 Figure 2 10 DPA 150 Cabinet details Battery trays UPS Customer Interface connections described in the Options chapter Parallel Isolator 1 per module IA1 Maintenance Bypass Isolator UPS Module P03 UPS Module P02 UPS Module P01 IA2 1 IA2 2 IA2 3 Battery fuse 1 per module F4 F5 F6 JD1 Smart Port RS232 Sub D9P JD7 Mod...

Page 22: ...e 2 Figure 2 11 DPA 250 Cabinet details UPS Customer Interface connections described in the Options chapter Parallel Isolator 1 per module IA1 Maintenance Bypass Isolator UPS Module P05 UPS Module P04 UPS Module P03 IA2 1 IA2 2 IA2 3 IA2 4 IA2 5 UPS Module P02 UPS Module P01 JD1 Smart Port RS232 Sub D9P JD7 Module control panel connector JD1 Smart Port RS232 Sub D9P JD7 Control Panel connector JD1...

Page 23: ...to collect data messages from the other system cabinets The received data is then processed at a centralised point on the master customer interface board and made available to the user directly on the RS232 port JD1 It is also transmitted to the CS141 card if inserted in the relevant slot Key Point The Parallel Interface Board is part of the factory fitted paralleling kit and is installed only in ...

Page 24: ...s It is also used to configure and interrogate the module during commissioning and troubleshooting Figure 2 13 Module control panel 2 6 1 Module control panel buttons The module control panel buttons allow you to Start up and shut down the UPS and transfer the load between inverter and bypass Monitor and display the UPS operating voltages currents frequencies and other values on the LCD display Re...

Page 25: ...it is accompanied by an audible warning which can be cancelled by pressing the RESET button 2 6 3 Power Management Display PMD A 2 x 20 character LCD Display simplifies communication with the UPS module and provides monitoring information The menu driven LCD provides access to an event register input and output voltage current frequency power monitoring battery run time monitoring access to comman...

Page 26: ...0 bottom module in cabinet 2 SYSTEM CONFIGURATION PARALLEL P06 3 Parallel System e g DPA 250 top module in cabinet 3 LOAD OFF SUPPLY FAILURE P15 DESCRIPTION LCD DISPLAY 1 Provides access to a log of the last 64 stored events EVENT LOG MEASUREMENTS 2 Provides access to voltages power frequencies currents autonomy monitor screens MEASUREMENTS COMMANDS 3 Provides access to the Load to inverter Load t...

Page 27: ...Voltage all three phases BYPASS VOLTAGE V 00 00 00 00 00 00 9 Output Voltage all three phases OUTPUT VOLTAGE V 0 0 00 00 00 00 00 10 Output Current all three phases OUTPUT CURRENT A 0 0 00 00 00 00 00 11 Active Output Power all three phases ACTIVE POWER KW 00 00 00 00 00 00 12 Reactive Output Power all three phases REACTIVE POWER kVAr 00 00 00 00 00 00 13 Apparent Output Power all three phases APP...

Page 28: ...ION V 000 4 Actual Date and Time DATE TIME dd mm yyyy hh mm ss DESCRIPTION LCD DISPLAY 1 Set up language SET LANGUAGE SET DATE AND TIME ENGLISH FRANCAIS POLISH 2 Set up Date and Time SET UP DATE TIME SET UP BATT TEST DD MM YY HH MM SS 3 Set up battery test SET UP BATT TEST SET UP GEN SET OPER DAY OF MONTH 1 31 HOUR OF DAY 0 23 REPETITIVE Y N 000 4 Set up operation with Gen Set SET GENERATOR OP BAT...

Page 29: ...t patient care Uninterruptible Power Supplies Ltd will not knowingly sell its products for use in such applications unless it receives in writing assurances satisfactory to Uninterruptible Power Supplies Ltd that the risks of injury or damage have been minimized the customer assumes all such risks and the liability of Uninterruptible Power Supplies Ltd is adequately protected under the circumstanc...

Page 30: ...you should unpack it and inspect it for signs of internal damage before you put it into storage Note that some optional equipment packages might be shipped inside the UPS cabinet and these too should be checked for damage If the equipment is damaged you should store the packing materials for further investigation Key Point If you are installing an external battery cabinet supplied by Uninterruptib...

Page 31: ... Modules w o Batt kg Unpacked Dimensions Module 43 1 45 3 46 8 WxHxD DPA 50 1 305 307 309 730 x 1650 x 800 DPA150 1 282 284 286 730 x 1975 x 800 2 325 330 333 730 x 1975 x 800 3 368 375 379 730 x 1975 x 800 DPA250 1 248 250 252 730 x 1975 x 800 2 291 296 299 730 x 1975 x 800 3 334 341 345 730 x 1975 x 800 4 377 386 392 730 x 1975 x 800 5 421 432 439 730 x 1975 x 800 CAUTION Local transportation Wh...

Page 32: ...e foam etc 4 Remove the anchor bolts securing the cabinet to the pallet then lift and remove the cabinet from the pallet 5 Retain the packaging materials for future shipment of the UPS 6 Examine the cabinet for any sign of damage and notify your supplier immediately if any damage is found 7 Open the cabinet door and verify that the UPS rating specifications on the nameplate located inside the door...

Page 33: ...ance e Adequate cooling air flow is available f The air conditioning system can provide a sufficient amount of air cooling to keep the room at or below the maximum desired temperature g No dust or corrosive explosive gases are present h The location is vibration free i If the UPS will be installed in bayed enclosures partition walls must be installed 3 3 2 Clearances Cooling air enters the front a...

Page 34: ...s not positioned immediately adjacent to any other cabinet or battery enclosure the clearance behind the unit can be reduced from 300mm B1 to 200mm B2 if the total combined side clearance E F is at least 400mm A TOP clearance of 400mm is only required if there is no otherroute at the rear of the UPS to dissipate the cooling air flow PW9000DPA S2 DPA 50 DPA 150 DPA 250 REAR FANS B2 E F D C2 1000mm ...

Page 35: ...internal mains isolator switch Similarly the UPS output should be connected to the load equipment via a suitably fused load switchgear panel Figure 3 2 shows an external battery cabinet used with the DPA 250 and DPA 50 or DPA150 if long autonomy times are required Suitable battery isolators must be fitted inside the external battery cabinet This requires a three pole breaker connected to the batte...

Page 36: ...the cables from the mains switchgear panel to each cabinet should be of equal length Similarly the UPS output cables connected to the load switchgear panel should be of equal length see Figure 3 3 this helps to balance the load sharing between the UPS cabinets Figure 3 3 UPS Cabinet parallel power cabling considerations Input neutral grounding The input neutral must be permanently connected unswit...

Page 37: ...he internal maintenance bypass is in use This situation is overcome by the addition of an external maintenance bypass circuit similar to that shown in Figure 3 5 which can supply the load through the external BYPASS switch while allowing the UPS cabinet input and output power to be totally isolated by opening the external INPUT and OUTPUT switches Parallel UPS cabinet installation When two or more...

Page 38: ... and DPA 150 models contain internal batteries complete with a fused battery isolator for each fitted power module The internal battery cables are supplied with the cabinet Where external batteries are used the DC cables and battery fuses are bespoke to the installation and must be rated accordingly Key Point This information is given for guidance only All fuses isolators and power cables must be ...

Page 39: ... 3 x M12 B PE 1xM12 B 362A 4 x M12 B PE 1xM12 B 15 x 16 25mm2 T 1 x M12 B Ind Batts 4 x M12 B Common battery PE Protective Earth N Neutral B Busbar connections with indicated bolt size Cable must be terminated with a suitable lug T Screwed terminal block with indicated maximum cable c s a Cable ends must be suitably prepared CableD Fuse D IA2 1 Cable A IA 1 Maint Bypass PW9000DPA CABINET BATTERY 1...

Page 40: ...L1 3L3 PE PE Ext Battery N DPA 50 Single Feed Power Connections Links shown in yellow across top of input mains terminal blocks DPA 50 Dual Feed Power Connections Links removed from top of mains input terminal blocks and dedicated bypass mains supply is connected DPA 150 Single Feed Power Connections Links shown in yellow linking the mains input terminals to the bypass input terminals Common batte...

Page 41: ...nt If you are installing an external battery cabinet supplied by Uninterruptible Power Supplies Ltd you should refer to the manual that is supplied with the cabinet for installation instructions 3L2 3N 3L1 3L3 1L1 1L2 1L3 1N External Batt Connections UPS Module Batt Connections UPS Module 1 UPS Module 4 UPS Module 5 UPS Module 2 UPS Module 3 UPS Module 1 UPS Module 4 UPS Module 5 UPS Module 2 UPS ...

Page 42: ...trates a DPA 250 cabinet with five fitted UPS modules Common battery All the power modules are connected to a single battery source although that source may itself comprise several battery strings connected in parallel This requires common battery links to be fitted to the UPS battery terminal blocks as shown Separate battery Each UPS module is connected to an individual battery string Key Point I...

Page 43: ...To UPS Module 2 N To UPS Module 1 N To UPS Module 3 To UPS Module 2 To UPS Module 1 To UPS Module 5 To UPS Module 4 To UPS Module 5 N To UPS Module 4 N To UPS Module 5 To UPS Module 4 For reasons of clarity the wiring for UPS modules 1 3 5 only is shown in detail PE 01 String A Fuses Battery String A 02 03 48 49 50 25 26 01 String B Fuses Battery String B 02 03 48 49 50 25 26 01 String C Fuses Bat...

Page 44: ...Module 1 To UPS Module 3 N To UPS Module 2 N To UPS Module 1 N To UPS Module 3 To UPS Module 2 To UPS Module 1 To UPS Module 5 To UPS Module 4 To UPS Module 5 N To UPS Module 4 N To UPS Module 5 To UPS Module 4 PE 01 String A Fuses BATTERY COMMON FUSES Battery String A 02 03 48 49 50 25 26 01 String B Fuses Battery String B 02 03 48 49 50 25 26 01 String C Fuses Battery String C 02 03 48 49 50 25 ...

Page 45: ...ver s at the bottom of the UPS cabinet 2 Connect an earth cable between the external mains switchgear panel and the UPS protective earth PE 3 Connect an earth cable between the external load switchgear panel and the UPS protective earth PE 4 If the UPS is to be cabled for a dual feed input split bypass operation a Remove the split bypass links shown in figures 3 8 to 3 9 b Connect the UPS bypass m...

Page 46: ...e Note that the Remote Shut down On Generator and Customer defined connections are described in Chapter 7 Figure 3 13 Customer interface input connections X1 CAUTION The customer interface board contain several DIP switches and jumper links which must be configured by the commissioning engineer Once set DO NOT touch Key Point When the UPS cabinet is installed as part of a parallel system the custo...

Page 47: ...2 7 ALARM BATT_LOW Battery Low X2 8 Battery OK X2 9 Common X2 10 Message LOAD_ON_MAINS Load on Bypass Mains X3 1 Load not on Bypass Mains X3 2 Common X3 3 ALARM COMMON_ALARM Common Alarm X3 4 No Common Alarm X3 5 Common X3 6 ALARM MODUL_ALARM1 Module 1 Alarm X3 7 No Alarm X3 8 Common X3 9 ALARM MODUL_ALARM2 Module 2 Alarm X3 10 No Alarm X4 1 Common X4 2 ALARM MODUL_ALARM3 Module 3 Alarm X4 3 No Al...

Page 48: ... DIP switch to define its position in the parallel system one UPS cabinet is configured to act as a master with the remaining cabinets acting as slaves If the master goes faulty the next cabinet former slave will immediately take over the roll of the master unit and the former master will switch off 3 7 2 Multidrop The optional Multidrop feature which is available only in a parallel cabinet system...

Page 49: ...the static bypass in all modules and is supplied with unprotected bypass mains power A parallel cabinet UPS system requires the installation of an external maintenance bypass facility which wraps around the entire UPS system this is optional in a single cabinet installation The external maintenance bypass is bespoke to the installation and can be installed in a separate Maintenance Bypass cabinet ...

Page 50: ...ly is unprotected if the bypass mains supply fails It is essential that the load user is informed of this possibility before you select these operating modes WARNING When the UPS is shut down power is still applied to the UPS modules and the cabinet input bypass terminals unless the input bypass mains is isolated at the mains switchgear panel In a single cabinet installation it is not permissible ...

Page 51: ...module in turn 8 On the module control panel simultaneously press both ON OFF buttons The UPS module will begin to power up over approximately 60s 9 On the module control panel after 60s verify that a The LINE 2 LED is green red during initial start up b The BYPASS LED is green c The INVERTER LED is red d The BATTERY LED is flashing red e The LCD displays LOAD NOT PROTECTED 10 Close the battery fu...

Page 52: ...ss supply The UPS system input supply is connected to the UPS The external UPS system output isolator is closed The load equipment is turned on and receiving power through the UPS maintenance bypass Powering up the UPS system If the UPS system is operating on maintenance bypass it can be powered up using the procedure described in Paragraph 4 3 How to start the UPS system from a fully powered down...

Page 53: ...e overload loss of redundancy or operating in bypass mode continue with step 5 a The INVERTER LED is OFF b The BYPASS LED is green c The LCD displays LOAD NOT PROTECTED Transfer the UPS to on bypass mode 3 On the module control panel a Press the UP key once to access the menu system b Use the UP DOWN keys to move the cursor so that it is adjacent to COMMANDS then press the ENTER key c Use the UP D...

Page 54: ...se of a single cabinet installation using the internal maintenance bypass switch IA1 the input bypass supply isolators on the mains switchboard panel must remain closed to support the load and the UPS cabinet s input bypass and output power terminals will remain live Where an external maintenance bypass facility is used the UPS system input supply can be turned off see the operating instructions f...

Page 55: ...MANDS then press the ENTER key c Use the UP DOWN keys move the cursor so that it is adjacent to LOAD TO BYPASS then press the ENTER key d All UPS modules will simultaneously transfer the load to the static bypass 2 On all module control panel of every UPS module verify that a The INVERTER LED has extinguished b The BYPASS LED is green c The LCD displays LOAD NOT PROTECTED Transfer from on bypass t...

Page 56: ...nce inspections form an integral part of all Extended Warranty Agreements maintenance contracts offered by Uninterruptible Power Supplies Ltd During a preventative maintenance inspection a trained Uninterruptible Power Supplies engineer will check and validate Site environmental conditions Integrity of electrical installation Cooling airflow Load characteristics Integrity of alarm and monitoring s...

Page 57: ...ry is fully charged The UPS input mains supply is present The battery test procedure can be carried out from the UPS front panel and performed irrespective of the UPS operating mode ON INVERTER or ON BYPASS ECO and whether or not the load is connected Battery disposal and recycling Batteries contain dangerous substances that can harm the environment if disposed of carelessly If you have reason to ...

Page 58: ...s provided on page 17 Paragraph 6 3 illustrates a list of the most common Alarms and Messages As you step through the event memory make a separate note of each recorded alarm condition as this will help identify the cause of any problems IMPORTANT NOTE Certain alarm conditions may latch on even after the cause of the alarm is no longer present For example if there is a brief mains failure during u...

Page 59: ...s a short circuit on load side of the UPS output power terminals Check all output connections and repair as required OVERLOAD Load exceeds the UPS rated power Identify which piece of equipment is causing the overload and remove it from the UPS Do not connect non critical loads such laser printers photocopiers electric heaters kettles etc OVERTEMPERATURE The UPS temperature has exceeded the maximum...

Page 60: ...ng at cabinet or system level A customer interface board which is fitted to the lower right of each UPS cabinet provides various means of connecting cabinet and system level UPS monitoring and control interfaces to external devices see figure 7 1 Figure 7 1 Customer interface board Key Point If the UPS is operating as a parallel cabinet system and the Multidrop application is enabled the customer ...

Page 61: ...ircuit to be maintained or tested without shutting down the UPS Connect the remote shut down device using a screened cable with 1 pair 0 5 mm and maximum length of 100m 7 2 2 Generator ON customer input The Generator ON input uses a normally open contact which closes when the standby generator is running and supplying input power to the UPS When used this facility enables an option to inhibit the ...

Page 62: ... only in a parallel system allows the customer interface board in the master cabinet to collect data messages from the other system cabinets via the cables connected to JD 12 The received data is then processed at a centralised point on the master customer interface board and made available to the user directly on the RS232 port JD1 It is also transmitted to the SNMP CS141 card if inserted in the ...

Page 63: ...ws it to be connected to the network using a standard CAT 5 network cable Once connected the UPS Management software agent which is already installed in the SNMP adapter then monitors the UPS operation and outputs its data in SNMP format to the connected network In a multi module UPS system the SNMP interface can communicate system wide data or data for an individual UPS module The SNMP adaptor re...

Page 64: ...m 730x1650x800 730x1975x800 730x1975x800 Weight of Empty Cabinet kg 262 239 205 Weight of Cabinet with modules and no batteries kg 305 309 with 1 Module 368 379 with 3 Modules 420 439 with 5 Modules Colours Front RAL 9007 black inlets Sidewalls Graphite grey DPA S2 POWER MODULES DPA 30 S2 DPA 40 S2 DPA 50 S2 Output Apparent Power KVA 30 40 50 Output Active Power KW 24 32 40 Output Power PF 1 KVA K...

Page 65: ...er with rated output power and charged battery per module output Cos 1 0 kW 25 5 34 0 42 6 Max Input current with rated output power and charged battery per module output Cos 1 0 A 36 8 49 1 62 1 Max Input power with rated output power and discharged battery per module output Cos 1 0 8A charger optional 15A charger kW 27 8 28 1 36 3 37 4 44 9 46 0 Max Input current with rated output power and disc...

Page 66: ...4 V ph N Permissible Unbalanced Load All 3 phases regulated independently 100 Phase Angle Tolerance With 100 Unbalanced load Deg 0 deg Overload Capability on Inverter 125 load 10 min 150 load 60 sec Output short capability RMS A Inverter 2 2 to 2 4x In for 40 ms Bypass 10 x In for 10 ms Crest Factor load supported 3 1 1 The bypass rated current is 63A with the following overload capabilities 110 c...

Page 67: ...l 0 82 3000m 9900ft asl Relative Air humidity Max 95 non condensing Accessibility Totally front accessibility for service and maintenance no need for side top or rear access Positioning Min 200mm rear space required for fan Input and Output Power Cabling From the bottom on the front Efficiency AC AC up to pf 1 0 depending on Module power Load 100 75 50 25 Efficiency 94 5 94 5 94 93 Efficiency Non ...