{"id":247,"date":"2010-12-27T03:36:16","date_gmt":"2010-12-27T03:36:16","guid":{"rendered":"https:\/\/www.enerpro-inc.com\/enerpro-locomotive-power-electronics-converter-elpec\/"},"modified":"2019-08-30T00:07:15","modified_gmt":"2019-08-30T00:07:15","slug":"enerpro-locomotive-power-electronics-converter-elpec","status":"publish","type":"page","link":"https:\/\/www.enerpro-inc.com\/locomotive-and-rail-products\/enerpro-locomotive-power-electronics-converter-elpec\/","title":{"rendered":"Enerpro Locomotive Power Electronics Converter (ELPEC)"},"content":{"rendered":"[et_pb_section fb_built=&#8221;1&#8243; fullwidth=&#8221;on&#8221; _builder_version=&#8221;3.22.7&#8243; background_image=&#8221;https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2019\/03\/Freight-Train.jpg&#8221; fb_built=&#8221;1&#8243; _i=&#8221;0&#8243; _address=&#8221;0&#8243;][et_pb_fullwidth_header title=&#8221;Enerpro Locomotive Power Electronics Converter (ELPEC)&#8221; _builder_version=&#8221;3.22.7&#8243; title_font=&#8221;||||||||&#8221; title_text_shadow_style=&#8221;preset1&#8243; title_text_shadow_color=&#8221;rgba(0,0,0,0.14)&#8221; background_color=&#8221;rgba(38,142,197,0.79)&#8221; custom_padding=&#8221;28px||28px||true&#8221; text_shadow_style=&#8221;preset1&#8243; text_shadow_color=&#8221;rgba(0,0,0,0.25)&#8221; _i=&#8221;0&#8243; _address=&#8221;0.0&#8243;][\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;3.22.3&#8243; fb_built=&#8221;1&#8243; _i=&#8221;1&#8243; _address=&#8221;1&#8243;][et_pb_row column_structure=&#8221;3_5,2_5&#8243; _builder_version=&#8221;3.25&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; _i=&#8221;0&#8243; _address=&#8221;1.0&#8243;][et_pb_column type=&#8221;3_5&#8243; _builder_version=&#8221;3.25&#8243; custom_padding=&#8221;|||&#8221; custom_padding__hover=&#8221;|||&#8221; _i=&#8221;0&#8243; _address=&#8221;1.0.0&#8243;][et_pb_text _builder_version=&#8221;3.27.3&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; hover_enabled=&#8221;0&#8243; _i=&#8221;0&#8243; _address=&#8221;1.0.0.0&#8243;]\n<div class=\"ems_right\">\n<p>The ELPEC is a solid state rectifier that outputs 425 amps of power for locomotive 74V DC loads.\u00a0 It provides a reliable and proven option for eliminating the auxiliary generator on locomotive repower projects.\u00a0 The ELPEC is powered by either isolated windings from the Companion Alternator (CA) or from the main CA stator windings through an isolation transformer.\u00a0 The complete system includes the ELPEC, a diode shunt module, and an inductor-capacitor filter to provide low ripple output power.\u00a0 A clean and flexible locomotive computer interface simplifies system integration.<\/p>\n<p>A key feature of the ELPEC is patented 3-stage battery charging, which has many advantages over constant voltage charging including longer battery life, greatly reduced sulfation, and shorter time to charge.\u00a0 Contact an Enerpro engineering representative to discuss installation options.<\/p>\n<\/div>\n[\/et_pb_text][et_pb_text _builder_version=&#8221;3.27.3&#8243; hover_enabled=&#8221;0&#8243;]\n<h3>Key Features:<\/h3>\n<ul>\n<li>3-stage Charging<\/li>\n<li>Simple and adaptable locomotive interface<\/li>\n<li>Proven robust design<\/li>\n<li>Thermal self-protection<\/li>\n<\/ul>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;2_5&#8243; _builder_version=&#8221;3.25&#8243; custom_padding=&#8221;|||&#8221; custom_padding__hover=&#8221;|||&#8221; _i=&#8221;1&#8243; _address=&#8221;1.0.1&#8243;][et_pb_image src=&#8221;https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2019\/08\/ELPEC-2.jpg&#8221; alt=&#8221;Enerpro Locomotive Power Electronics Converter (ELPEC)&#8221; align_tablet=&#8221;center&#8221; align_last_edited=&#8221;on|desktop&#8221; _builder_version=&#8221;3.27.3&#8243; border_width_all=&#8221;1px&#8221; border_color_all=&#8221;rgba(51,51,51,0.09)&#8221; box_shadow_style=&#8221;preset1&#8243; box_shadow_color=&#8221;rgba(0,0,0,0.06)&#8221; width=&#8221;75%&#8221; _i=&#8221;0&#8243; _address=&#8221;1.0.1.0&#8243;][\/et_pb_image][et_pb_text _builder_version=&#8221;3.26&#8243; text_font=&#8221;||||||||&#8221; text_line_height=&#8221;2.2em&#8221; width=&#8221;100%&#8221; global_module=&#8221;131579&#8243; saved_tabs=&#8221;all&#8221; _i=&#8221;1&#8243; _address=&#8221;1.0.1.1&#8243;]\n<p><a href=\"\/downloads\/locomotive\/PD767-ELPEC-Battery-Charger-Product-Guide.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2019\/04\/PDF-icon22h.png\" width=\"17\" height=\"22\" alt=\"\" class=\"wp-image-29508 alignnone size-full\" \/>\u00a0Product Guide<\/a><br \/> <img loading=\"lazy\" decoding=\"async\" class=\"wp-image-29508 alignnone size-full\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2019\/04\/PDF-icon22h.png\" alt=\"\" width=\"17\" height=\"22\" \/><a href=\"\/downloads\/locomotive\/M1964-ELPEC-PCA3DCE1735-Physical.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">\u00a0Mechanical Drawing<\/a><a href=\"\/downloads\/locomotive\/PD767-ELPEC-Battery-Charger.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><br \/> <img loading=\"lazy\" decoding=\"async\" class=\"wp-image-29508 alignnone size-full\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2019\/04\/PDF-icon22h.png\" alt=\"\" width=\"17\" height=\"22\" \/><\/a><a href=\"\/downloads\/locomotive\/E2344-Typical-ELPEC-Subassy.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">\u00a0Schematic<\/a><a href=\"\/downloads\/locomotive\/PD767-ELPEC-Battery-Charger.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><\/a><\/p>\n[\/et_pb_text][et_pb_sidebar area=&#8221;et_pb_widget_area_2&#8243; _builder_version=&#8221;3.25.2&#8243; _i=&#8221;2&#8243; _address=&#8221;1.0.1.2&#8243;][\/et_pb_sidebar][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;3.25&#8243; _i=&#8221;1&#8243; _address=&#8221;1.1&#8243;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;3.25&#8243; custom_padding=&#8221;|||&#8221; custom_padding__hover=&#8221;|||&#8221; _i=&#8221;0&#8243; _address=&#8221;1.1.0&#8243;][et_pb_toggle title=&#8221;Technical Details&#8221; icon_color=&#8221;#268ec5&#8243; _builder_version=&#8221;3.26&#8243; title_text_color=&#8221;#000000&#8243; title_font=&#8221;||||||||&#8221; title_font_size=&#8221;20px&#8221; body_font=&#8221;||||||||&#8221; background_color=&#8221;#ffffff&#8221; border_radii=&#8221;on|10px|10px|10px|10px&#8221; box_shadow_style=&#8221;preset1&#8243; box_shadow_color=&#8221;rgba(0,0,0,0.12)&#8221; custom_padding=&#8221;2vw|3vw|2vw|3vw|true|true&#8221; _i=&#8221;0&#8243; _address=&#8221;1.1.0.0&#8243;]\n<h2>Three-Stage Charge Profile<\/h2>\n<p>Air pollution regulations and high fuel costs have made locomotive operators shut down idling locomotives much more frequently than in the past. This change in locomotive operation has resulted in premature loss of battery capacity and more frequent cell failure rate. These problems are caused by the single-stage charge profile provided by conventional chargers, whether implemented by an Auxiliary Generator-powered diode rectifier or a Companion Alternator-powered SCR rectifier. With single-stage charging, the initial current immediately after engine start is limited only by generator output and battery circuit resistance. Most locomotive battery charging circuits incorporate a current limiting resistor to reduce the charge current. Even with this resistor, the initial current can greatly exceed the battery manufacturer\u2019s recommended maximum charging current and shorten battery life. The single-stage charger transitions from the high initial first-stage current when the battery voltage rises to reach the nominal voltage setpoint of 74 V. The single-stage charger then maintains constant nominal 74 V on the battery until the engine is shut down. According to battery experts, 74 V is insufficient to convert all of the battery\u2019s active material during the engine run time if the engine is shut down several times per day. The result is a progressive loss of capacity.<\/p>\n<p>The three-stage charge profile produced by the ELPEC regulates the first, or Bulk Stage, current to the manufacturer\u2019s typically recommended 20% of capacity. In the second, or Absorption Stage, the rectifier voltage is regulated to typically 78 V. This elevated voltage converts the maximum amount of active battery material while equalizing the charge in each cell, thus minimizing sulfation and capacity loss. In the third, or Float Stage, the ELPEC reverts to a constant-voltage regulation mode (nominally 72 V).<\/p>\n<p><strong>Bulk Stage<\/strong><br \/> After engine start, the unit enters the 80 A constant-current Bulk Stage. The battery behaves as a capacitor in that the constant charging current results in battery voltage increasing linearly with time. The Bulk Stage ends when the voltage reaches a converter-imposed limit of typically 78 V (2.44 Volts per cell).<\/p>\n<p><strong>Absorption Stage<\/strong><br \/> The constant voltage Absorption Stage begins with the battery charged to about 80% total capacity. The Absorption Stage current decays exponentially with time from the initial 80 A until it reaches one of two Float Stage thresholds. The transition to the Float Stage occurs when one of two conditions are met:<\/p>\n<ol>\n<li>The Absorption Stage current decays to typically 25 A, or<\/li>\n<li>The total Absorption Stage charge reaches approximately 25% capacity.<\/li>\n<\/ol>\n<p>Forcing the Absorption\/Float transition to occur as a function of charge assures that a shorted cell or other battery defect will not result in continuous operation at elevated voltage.<\/p>\n<p><strong>Float Stage<\/strong><br \/> During the regulated 72V Float Stage, the battery current gradually decays to the steady-state self-discharge current. This maintains a full battery charge as long as the engine is running.<\/p>\n<p><strong>Block Diagram<br \/> <\/strong>The ELPEC is configured in a locomotive system as shown in Enerpro drawing <a href=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/M1964A_ELPEC_PCA3DCE1735_Physical.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">E1735<\/a>. The conversion is achieved by means of a six-thyristor rectifier bridge that is connected to an isolated winding on the companion alternator. If an isolated Companion Alternator winding is not available, the ELPEC may be powered through an appropriate isolation transformer. Thyristor firing, voltage regulation, current regulation, and control interfacing is achieved by a charge control and thyristor firing board as shown. The DC output is filtered with a typical series inductor\/shunt capacitor arrangement and fed to a diode\/shunt assembly. The battery current shunt feedback signal is isolated from the firing\/regulator board by means of a precision isolation amplifier. Critical and non-critical loads may be split as needed by using the appropriate terminal lug on the diode\/shunt assembly.<\/p>\n<p><strong>ENVIRONMENTAL SPECIFICATIONS<\/strong><br \/> The ELPEC is an open-frame assembly. Environmental specifications that are enclosuredependent, such as salt fog and dust infiltration, are deferred to the customer-supplied enclosure requirements. Any responsibility for environmental qualification rests with the customer.<\/p>\n<p><strong>Cooling Air Temperature<\/strong><\/p>\n<ul>\n<li>-40\u00b0 C to 65\u00b0 C continuous at rated current<\/li>\n<li>100\u00b0 C for 15 minutes at reduced current (tunnel operation)<\/li>\n<li>-40\u00b0 C to 65\u00b0 C storage<\/li>\n<\/ul>\n<p>The ELPEC incorporates a temperature sensor circuit that linearly reduces the available output current from the rated maximum current to zero current when the thyristor temperature exceeds a preset limit. This circuit ensures that the current capacity of the ELPEC is fully utilized while keeping the thyristor junction temperature below a safe level.<\/p>\n<p>The Enerpro-designed and manufactured combination regulator, gate trigger, and controller circuit board and snubber board, along with the thyristor modules, bus bars\/terminals, current shunt and thyristor temperature sensor are mounted on a finned-on-one-side aluminum extrusion and adaptor plate. These components form an open frame assembly with envelope dimensions of 22.75 in. (578 mm) length x 11.44 in. (291 mm) width x 8.65 in. (220 mm) depth. The assembly is attached to a panel with the heat sink fins protruding into the air stream behind the panel as seen in Drawing M1888.<\/p>\n<p><strong>Altitude <\/strong><br \/> -100 to +11000 feet above sea level.<\/p>\n<p><strong>Shock and Vibration<\/strong><br \/> The ELPEC is designed to withstand continuous high shock and vibration in both directions of all three planes at an as-yet to be determined frequency.<\/p>\n<p><strong>Maintenance<\/strong><br \/> Occasional cleaning of the heat sink fins may be required to maintain full rated current capability. Clean, dry cooling air should be used<\/p>\n<p><strong>Electro-Magnetic Compatibility<\/strong><br \/> Compatibility with the following EMI tests has been tested in similar projects with excellent results. Note that the customer assumes responsibility for EMI certification testing.<\/p>\n<ul>\n<li>Conducted Susceptibility<\/li>\n<li>Radiated Susceptibility<\/li>\n<li>Conducted Emissions<\/li>\n<li>Electrostatic Discharge<\/li>\n<\/ul>\n<p><strong>Failure Rate<\/strong><br \/> The useful design life is 16 years in freight locomotive service with a critical failure rate of less<br \/> than 2% per year. The ELPEC is unit-serviceable in event of failure.<\/p>\n<p><strong>Efficiency<\/strong><br \/> The ELPEC efficiency is greater than 95% from 20% to 100% of rated load.<\/p>\n<p><strong>Load Filter<\/strong><br \/> An LC filter reduces the ripple current voltage applied to the battery and other loads. The filter resonant frequency selected should be less than six times the lowest generator frequency. The filter attenuation should limit the ripple voltage to less than 5% of the dc voltage. The Enerpro Capacitor Filter Assembly (CFA-1) provides 0.1 F (200 Vdc working, 250 Vdc surge) of capacitance in a compact, ruggedized package suitable for rail applications.<\/p>\n<p><strong>Control (Enable Command) Power<\/strong><br \/> All control and enable command power is derived directly from the locomotive battery.<\/p>\n<p><strong>Firing\/Regulator Board<\/strong><br \/> The FCROVF6-TSCS-1 variable frequency firing\/regulator board uses the field-proven elements of the rail industry-standard FCOVF6100 variable frequency firing board and the VLTLCL-1 regulator board, originally developed for a mining truck battery charger application. This board also includes custom fault monitoring, control interface, and battery current regulation features not present in other Enerpro products. The printed circuit board is a sixlayer, 0.093\u201d-thick FR-4 epoxy laminate with plated through holes and solder mask over bare copper. All bare Enerpro circuit boards conform to UL94-V0. A polyurethane conformal coating (MIL-1-46056, Type UR) is applied to the printed circuit board to provide enhanced immunity to dirt and moisture.<\/p>\n<p><strong>Snubber Board<\/strong><br \/> In a thyristor converter, a high rate-of-rise in anode to cathode voltage, or dV\/dt, occurs when a thyristor ceases conduction or when another thyristor in the circuit is gated into conduction. The dV\/dt of the thyristor voltage must be limited to avoid erratic circuit operation and device damage. Connected anode to cathode, the snubber circuit resistors and capacitors limit this dV\/dt. Specifically designed for use in high vibration environments, the TSBHG-6 board uses rail mounted TO-220 style resistors and high-quality, board mounted WIMA film capacitors. This configuration minimizes the susceptibility of the solder joints to vibration and provides a convenient heat sinking scheme for the snubber resistors.<\/p>\n<p><strong>Status LED Indicators<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" alignleft size-full wp-image-243\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/LED_Status.png\" width=\"200\" height=\"152\" border=\"0\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n[\/et_pb_toggle][et_pb_toggle title=&#8221;System Connections and Setup&#8221; icon_color=&#8221;#268ec5&#8243; _builder_version=&#8221;3.26.6&#8243; title_text_color=&#8221;#000000&#8243; title_font=&#8221;||||||||&#8221; title_font_size=&#8221;20px&#8221; body_font=&#8221;||||||||&#8221; background_color=&#8221;#ffffff&#8221; border_radii=&#8221;on|10px|10px|10px|10px&#8221; box_shadow_style=&#8221;preset1&#8243; box_shadow_color=&#8221;rgba(0,0,0,0.12)&#8221; custom_padding=&#8221;2vw|3vw|2vw|3vw|true|true&#8221; _i=&#8221;1&#8243; _address=&#8221;1.1.0.1&#8243;]\n<p><img loading=\"lazy\" decoding=\"async\" class=\" size-full wp-image-244\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/LED_Status_Description.png\" width=\"600\" height=\"226\" border=\"0\" srcset=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/LED_Status_Description.png 600w, https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/LED_Status_Description-300x113.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p><strong>System Connections and Setup <\/strong><br \/> Refer to connection diagram E1735. All internal connections are completed at the factory. Connections for ac and dc power are made directly to the bus bars, which are fitted with captive 1\/2-13 UNC threaded PEM nuts. Enable and status read-back signals are available on connector J1, which is a weather-tight, keyed, bayonet-style cylindrical connector (MIL 5015 series, 24-5 insert).<\/p>\n<p>APPLICABLE DOCUMENTS<\/p>\n<ul>\n<li>E1735, Connection Diagram, \u201cELPEC 74 V Controlled Rectifier &amp; Battery Charger\u201d<\/li>\n<li>E1734, Schematic Diagram, \u201cFCROVF6-TSCS-1, Simplified Variable Frequency Firing Circuit with Three-Stage Charging\u201d<\/li>\n<li>E459, Schematic Diagram, \u201cHigh Shock 6-Circuit Snubber Board, TSBHG-6\u201d<\/li>\n<li>M1888, Mechanical Diagram, \u201cELPEC Phase Controller\u201d<\/li>\n<\/ul>\n<p>REFERENCE DRAWING E1735<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" alignleft size-full wp-image-245\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/ELPEC_Electrical_Specs.png\" width=\"600\" height=\"306\" border=\"0\" srcset=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/ELPEC_Electrical_Specs.png 600w, https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/ELPEC_Electrical_Specs-300x153.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong><span>PRELIMINARY&#8211; <\/span><\/strong>REFERENCE DRAWING E1735<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" size-full wp-image-246\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/elpec_electrical_connections_v2.png\" width=\"600\" height=\"368\" border=\"0\" srcset=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/elpec_electrical_connections_v2.png 600w, https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/elpec_electrical_connections_v2-300x184.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>&nbsp;<\/p>\n[\/et_pb_toggle][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; module_class=&#8221;customfooter&#8221; _builder_version=&#8221;3.26&#8243; background_color=&#8221;#2A2A2A&#8221; min_height=&#8221;458px&#8221; custom_padding=&#8221;||0px|||&#8221; global_module=&#8221;131558&#8243; saved_tabs=&#8221;all&#8221; fb_built=&#8221;1&#8243; _i=&#8221;3&#8243; _address=&#8221;3&#8243;][et_pb_row column_structure=&#8221;1_5,1_5,1_5,1_5,1_5&#8243; _builder_version=&#8221;3.26&#8243; width=&#8221;90%&#8221; max_width=&#8221;1440px&#8221; _i=&#8221;0&#8243; _address=&#8221;2.0&#8243;][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;0&#8243; _address=&#8221;2.0.0&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.26.6&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.9em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.0.0.0&#8243;]\n<h4 class=\"title\">UNITED STATES<\/h4>\n<p>Enerpro, Inc.<br \/> Global Headquarters<br \/> 99 Aero Camino<br \/> Goleta, CA 93117<\/p>\n<p><a href=\"mailto:info@enerpro-inc.com\" target=\"_blank\" rel=\"noopener noreferrer\">info@enerpro-inc.com<\/a><br \/> <a href=\"https:\/\/www.enerpro-inc.com\/undefined\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.enerpro-inc.com<\/a><\/p>\n<p>Toll Free: (877) 648-2114<br \/> Tel: (805) 683-2114<br \/> Fax: (805) 964-0798<\/p>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;1&#8243; _address=&#8221;2.0.1&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.26.6&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.9em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.0.1.0&#8243;]\n<h4 class=\"title\">CANADA<\/h4>\n<p>ICT Power Company Inc.<br \/>1220 Corporate Dr.<br \/>Burlington, ON L7L 5R6<br \/>Canada<\/p>\n<p><a href=\"mailto:sales@ictpower.com\" target=\"_blank\" rel=\"noopener noreferrer\">sales@ictpower.com<\/a><br \/><a href=\"http:\/\/www.ictpower.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.ictpower.com<\/a><\/p>\n<p>Tel: 905.631.8494<br \/>Fax: 905.631.8495<\/p>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;2&#8243; _address=&#8221;2.0.2&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.26.6&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.9em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.0.2.0&#8243;]\n<h4 class=\"title\">MEXICO<\/h4>\n<p>Electronica Integral De Puebla, SA DE CV<br \/> Jose Guadalupe Posada 1413\u00a0col. Satelite<br \/> Puebla, Pue. 72320<br \/> Mexico<\/p>\n<p><a href=\"mailto:%20ventas@eipsamex.com\" target=\"_blank\" rel=\"noopener noreferrer\">ventas@eipsamex.com<\/a><br \/> <a href=\"mailto:%20eipsamex@yahoo.com.mx\">eipsamex@yahoo.com.mx<\/a><br \/> <a href=\"http:\/\/www.eipsamex.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.eipsamex.com<br \/><\/a>Tel: +52 (222) 2343406<br \/> Fax: +52 (222) 2344205<\/p>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;3&#8243; _address=&#8221;2.0.3&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.26.7&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.9em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.0.3.0&#8243;]\n<h4 class=\"title\">UNITED KINGDOM<\/h4>\n<p>Andrew Chettle<br \/> Power Products International Limited<br \/> Commerce Way<br \/> Edenbridge<br \/> Kent TN8 6ED<\/p>\n<p><a href=\"mailto:%20%20sales@ppi-uk.com\" target=\"_blank\" rel=\"noopener noreferrer\">sales@ppi-uk.com<br \/> <\/a><a href=\"http:\/\/www.ppi-uk.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.ppi-uk.com<\/a><br \/> Tel: 01732 866424<br \/> Fax: 01732 866399<\/p>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;4&#8243; _address=&#8221;2.0.4&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.26.6&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.9em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.0.4.0&#8243;]\n<h4 class=\"title\">ITALY, SLOVENIA, SLOVAKIA, CZECH REPUBLIC<\/h4>\n<p>Bruno Passerini<br \/>G.P.S. \u2013 Green Power Solutions SRL<br \/>Via Venezia 34D<br \/>10088 Volpiano \u2013 Torino<br \/>Italy<\/p>\n<p><a href=\"mailto:%20info@gpsemi.it\" target=\"_blank\" rel=\"noopener noreferrer\">info@gpsemi.it<\/a><br \/><a href=\"http:\/\/www.gpsemi.it\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.gpsemi.it<\/a><br \/>Tel: +39 011 9882251<br \/>Fax: +39 011 9881358<\/p>\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_5,1_5,1_5,1_5,1_5&#8243; _builder_version=&#8221;3.26.6&#8243; width=&#8221;90%&#8221; max_width=&#8221;1440px&#8221; _i=&#8221;1&#8243; _address=&#8221;2.1&#8243;][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;0&#8243; _address=&#8221;2.1.0&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.26.6&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.6em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.1.0.0&#8243;]\n<h4 class=\"title\">TECHNICAL SUPPORT<\/h4>\n<p>Design Support<br \/>\nIn-Service Support<br \/>\nToll Free: (877) 648-2114<br \/>\n(805) 683-2114<br \/>\n<a href=\"mailto:support@enerpro-inc.com\">support@enerpro-inc.com<\/a><\/p>\n<p><a href=\"https:\/\/www.enerpro-inc.com\/images\/stories\/enerpro\/Support\/Enerpro_Sales_Policy_2015.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Sales Policy<br \/>\n<\/a><a href=\"https:\/\/www.enerpro-inc.com\/support\/190\" target=\"_blank\" rel=\"noopener noreferrer\">RMA Policy<br \/>\n<\/a><a href=\"https:\/\/www.enerpro-inc.com\/images\/stories\/enerpro\/Support\/RMA_Request_Form_Web.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">RMA Request Form<\/a><\/p>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;1&#8243; _address=&#8221;2.1.1&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.26.6&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.9em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.1.1.0&#8243;]\n<h4 class=\"title\">SCANDINAVIA<\/h4>\n<p>MPE Cathodic AS<br \/> P. O. Box 74<br \/> N1581 Rygge, Norway<br \/> Marine &amp; Offshore<br \/> Jotun ICCP Specialists<\/p>\n<p><a href=\"mailto:emil@mpecathodic.no\" target=\"_blank\" rel=\"noopener noreferrer\">emil@mpecathodic.no<\/a><br \/> <a href=\"mailto:%20roy@mpecathodic.no\" target=\"_blank\" rel=\"noopener noreferrer\">roy@mpecathodic.no<\/a><br \/> <a href=\"http:\/\/www.mpecathodic.no\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.mpecathodic.no<\/a><br \/>Tel: +47 69 23 29 00<br \/> Fax: +47 69 23 29 01<br \/> Mob: +47 95 11 81 82<\/p>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;2&#8243; _address=&#8221;2.1.2&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.27.3&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.9em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.1.2.0&#8243;]\n<h4 class=\"title\">SOUTH AMERICA<\/h4>\n<p>Andes Controls, Power and Automation<br \/> Cristi\u00e1n Ladisla Bohn<br \/> Av. Holanda 099, Oficina 1101<br \/> Providencia, Santiago, Chile<\/p>\n<p><a href=\"mailto:contact@andescpa.com\">contact@andescpa.com<\/a><br \/> <a href=\"http:\/\/andescpa.com\/\">http:\/\/andescpa.com\/<\/a><br \/> Tel: +56 2 2306 6202<\/p>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;3&#8243; _address=&#8221;2.1.3&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.26.6&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.9em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.1.3.0&#8243;]\n<h4 class=\"title\">THAILAND, MALAYSIA, VIETNAM, PHILIPPINES<\/h4>\n<p>Akom Chantakhun<br \/> CBC International Limited<br \/> 56\/12-13 Soi Prayasuren 45<br \/> Samwatawantok, Klongsamwa<br \/> Bangkok, 10510<br \/> Thailand<\/p>\n<p><a href=\"mailto:akom@cbcinter.co.th\" target=\"_blank\" rel=\"noopener noreferrer\">akom@cbcinter.co.th<\/a><br \/> <a href=\"http:\/\/www.cbcinter.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.cbcinter.com<\/a><br \/> <a href=\"http:\/\/www.cbcinter.co.th\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.cbcinter.co.th<br \/><\/a><strong><\/strong><strong><\/strong>Tel: 662 902 6106-9<br \/> Fax: 662 914-3009<\/p>\n[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_5&#8243; _builder_version=&#8221;3.26&#8243; _i=&#8221;4&#8243; _address=&#8221;2.1.4&#8243;][et_pb_text module_id=&#8221;customfoot&#8221; _builder_version=&#8221;3.26.6&#8243; text_text_color=&#8221;#ffffff&#8221; text_font_size=&#8221;13px&#8221; text_line_height=&#8221;1.9em&#8221; header_4_text_color=&#8221;#ffffff&#8221; header_4_font_size=&#8221;16px&#8221; header_4_line_height=&#8221;1.2em&#8221; _i=&#8221;0&#8243; _address=&#8221;2.1.4.0&#8243;]\n<h4 class=\"title\">HONG KONG, MACAU, CHINA (PRC)<\/h4>\n<p>Jane Lu<br \/>Bonning Asia Co., Ltd<br \/>Room 1604, Arion Commercial Centre<br \/>2-12 Queen\u2019s Road, West<br \/>Hong Kong<\/p>\n<p><a href=\"mailto:janelu2000@yahoo.com\" target=\"_blank\" rel=\"noopener noreferrer\">janelu2000@yahoo.com<\/a><br \/><a href=\"http:\/\/www.shjdn.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.shjdn.com<\/a><br \/>Tel: 852 2543 0186<br \/>Fax: 852 2542 2114<br \/>Mob: 852 9379 8172<\/p>\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]\n","protected":false},"excerpt":{"rendered":"<div class=\"ems_right\"><img loading=\"lazy\" decoding=\"async\" class=\" size-full wp-image-240\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/ELPEC_250x202.png\" border=\"0\" width=\"250\" height=\"202\" \/><br \/><a href=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/PD767_E_ELPEC_Battery_Charger_Prod_Gd.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Product Guide<\/a><br \/><a href=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/M1964A_ELPEC_PCA3DCE1735_Physical.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Mechanical Drawing<\/a><\/div>\n<p style=\"text-align: left\">The Enerpro Locomotive Power Electronics Converter, or ELPEC, is an open-frame phase controlled rectifier. The converter is installed in the locomotive electrical equipment locker. The ELPEC is supplied with constant volts per hertz three-phase voltage from an isolated stator winding on the Companion Alternator (CA), or alternatively, from an isolation transformer fed by the CA stator winding. The rectifier converts this variable-frequency, variable-amplitude, ac voltage into regulated dc voltage at a nominal 74 Vdc. Rectifier current passes through an external inductor and capacitor filter (capacitor filter part number CFA-1). The resultant filtered 74 Vdc supplies power to the battery and other direct current equipment; an external diode\/shunt assembly (Enerpro part number PCM1DCE1768) provides blocking and reverse polarity protection diodes and an independent battery current monitoring shunt. A three-stage charging algorithm is implemented within the voltage and current regulation circuitry to enhance battery life and performance. This algorithm eliminates the need for battery-based temperature compensation.<\/p>\n<p><strong> <\/strong><\/p>\n<p>\u00a0<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":29731,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"<div class=\"ems_right\"><img class=\" size-full wp-image-240\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/ELPEC_250x202.png\" width=\"250\" height=\"202\" border=\"0\" \/><br \/><a href=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/PD767_E_ELPEC_Battery_Charger_Prod_Gd.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Product Guide<\/a><br \/><a href=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/M1964A_ELPEC_PCA3DCE1735_Physical.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Mechanical Drawing<\/a><\/div><p style=\"text-align: left;\">The Enerpro Locomotive Power Electronics Converter, or ELPEC, is an open-frame phase controlled rectifier. The converter is installed in the locomotive electrical equipment locker. The ELPEC is supplied with constant volts per hertz three-phase voltage from an isolated stator winding on the Companion Alternator (CA), or alternatively, from an isolation transformer fed by the CA stator winding. The rectifier converts this variable-frequency, variable-amplitude, ac voltage into regulated dc voltage at a nominal 74 Vdc. Rectifier current passes through an external inductor and capacitor filter (capacitor filter part number CFA-1). The resultant filtered 74 Vdc supplies power to the battery and other direct current equipment; an external diode\/shunt assembly (Enerpro part number PCM1DCE1768) provides blocking and reverse polarity protection diodes and an independent battery current monitoring shunt. A three-stage charging algorithm is implemented within the voltage and current regulation circuitry to enhance battery life and performance. This algorithm eliminates the need for battery-based temperature compensation.<\/p><p>\u00a0<\/p><p>{tab=Description|grey}<\/p><p><strong>THREE-STAGE CHARGE PROFILE <\/strong><br \/>Air pollution regulations and high fuel costs have made locomotive operators shut down idling locomotives much more frequently than in the past. This change in locomotive operation has resulted in premature loss of battery capacity and more frequent cell failure rate. These problems are caused by the single-stage charge profile provided by conventional chargers, whether implemented by an Auxiliary Generator-powered diode rectifier or a Companion Alternator-powered SCR rectifier. With single-stage charging, the initial current immediately after engine start is limited only by generator output and battery circuit resistance. Most locomotive battery charging circuits incorporate a current limiting resistor to reduce the charge current. Even with this resistor, the initial current can greatly exceed the battery manufacturer\u2019s recommended maximum charging current and shorten battery life. The single-stage charger transitions from the high initial first-stage current when the battery voltage rises to reach the nominal voltage setpoint of 74 V. The single-stage charger then maintains constant nominal 74 V on the battery until the engine is shut down. According to battery experts, 74 V is insufficient to convert all of the battery\u2019s active material during the engine run time if the engine is shut down several times per day. The result is a progressive loss of capacity.<\/p><p>The three-stage charge profile produced by the ELPEC regulates the first, or Bulk Stage, current to the manufacturer\u2019s typically recommended 20% of capacity. In the second, or Absorption Stage, the rectifier voltage is regulated to typically 78 V. This elevated voltage converts the maximum amount of active battery material while equalizing the charge in each cell, thus minimizing sulfation and capacity loss. In the third, or Float Stage, the ELPEC reverts to a constant-voltage regulation mode (nominally 72 V).<\/p><p><strong>Bulk Stage<\/strong> <br \/>After engine start, the unit enters the 80 A constant-current Bulk Stage. The battery behaves as a capacitor in that the constant charging current results in battery voltage increasing linearly with time. The Bulk Stage ends when the voltage reaches a converter-imposed limit of typically 78 V (2.44 Volts per cell).<\/p><p><strong>Absorption Stage<\/strong> <br \/>The constant voltage Absorption Stage begins with the battery charged to about 80% total capacity. The Absorption Stage current decays exponentially with time from the initial 80 A until it reaches one of two Float Stage thresholds. The transition to the Float Stage occurs when one of two conditions are met:<\/p><ol><li>The Absorption Stage current decays to typically 25 A, or<\/li><li>The total Absorption Stage charge reaches approximately 25% capacity.<\/li><\/ol><p>Forcing the Absorption\/Float transition to occur as a function of charge assures that a shorted cell or other battery defect will not result in continuous operation at elevated voltage.<\/p><p><strong>Float Stage<\/strong> <br \/>During the regulated 72V Float Stage, the battery current gradually decays to the steady-state self-discharge current. This maintains a full battery charge as long as the engine is running.<\/p><p><strong>Block Diagram<br \/><\/strong>The ELPEC is configured in a locomotive system as shown in Enerpro drawing <a href=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/M1964A_ELPEC_PCA3DCE1735_Physical.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">E1735<\/a>. The conversion is achieved by means of a six-thyristor rectifier bridge that is connected to an isolated winding on the companion alternator. If an isolated Companion Alternator winding is not available, the ELPEC may be powered through an appropriate isolation transformer. Thyristor firing, voltage regulation, current regulation, and control interfacing is achieved by a charge control and thyristor firing board as shown. The DC output is filtered with a typical series inductor\/shunt capacitor arrangement and fed to a diode\/shunt assembly. The battery current shunt feedback signal is isolated from the firing\/regulator board by means of a precision isolation amplifier. Critical and non-critical loads may be split as needed by using the appropriate terminal lug on the diode\/shunt assembly.<\/p><p><strong>ENVIRONMENTAL SPECIFICATIONS<\/strong> <br \/>The ELPEC is an open-frame assembly. Environmental specifications that are enclosuredependent, such as salt fog and dust infiltration, are deferred to the customer-supplied enclosure requirements. Any responsibility for environmental qualification rests with the customer.<\/p><p><strong>Cooling Air Temperature<\/strong><\/p><ul><li>-40\u00b0 C to 65\u00b0 C continuous at rated current<\/li><li>100\u00b0 C for 15 minutes at reduced current (tunnel operation)<\/li><li>-40\u00b0 C to 65\u00b0 C storage<\/li><\/ul><p>The ELPEC incorporates a temperature sensor circuit that linearly reduces the available output current from the rated maximum current to zero current when the thyristor temperature exceeds a preset limit. This circuit ensures that the current capacity of the ELPEC is fully utilized while keeping the thyristor junction temperature below a safe level.<\/p><p>The Enerpro-designed and manufactured combination regulator, gate trigger, and controller circuit board and snubber board, along with the thyristor modules, bus bars\/terminals, current shunt and thyristor temperature sensor are mounted on a finned-on-one-side aluminum extrusion and adaptor plate. These components form an open frame assembly with envelope dimensions of 22.75 in. (578 mm) length x 11.44 in. (291 mm) width x 8.65 in. (220 mm) depth. The assembly is attached to a panel with the heat sink fins protruding into the air stream behind the panel as seen in Drawing M1888.<\/p><p><strong>Altitude <\/strong><br \/>-100 to +11000 feet above sea level.<\/p><p><strong>Shock and Vibration<\/strong><br \/>The ELPEC is designed to withstand continuous high shock and vibration in both directions of all three planes at an as-yet to be determined frequency.<\/p><p><strong>Maintenance<\/strong> <br \/>Occasional cleaning of the heat sink fins may be required to maintain full rated current capability. Clean, dry cooling air should be used<\/p><p><strong>Electro-Magnetic Compatibility<\/strong> <br \/>Compatibility with the following EMI tests has been tested in similar projects with excellent results. Note that the customer assumes responsibility for EMI certification testing.<\/p><ul><li>Conducted Susceptibility<\/li><li>Radiated Susceptibility<\/li><li>Conducted Emissions<\/li><li>Electrostatic Discharge<\/li><\/ul><p><strong>Failure Rate<\/strong><br \/>The useful design life is 16 years in freight locomotive service with a critical failure rate of less<br \/>than 2% per year. The ELPEC is unit-serviceable in event of failure.<\/p><p><strong>Efficiency<\/strong> <br \/>The ELPEC efficiency is greater than 95% from 20% to 100% of rated load.<\/p><p><strong>Load Filter<\/strong> <br \/>An LC filter reduces the ripple current voltage applied to the battery and other loads. The filter resonant frequency selected should be less than six times the lowest generator frequency. The filter attenuation should limit the ripple voltage to less than 5% of the dc voltage. The Enerpro Capacitor Filter Assembly (CFA-1) provides 0.1 F (200 Vdc working, 250 Vdc surge) of capacitance in a compact, ruggedized package suitable for rail applications.<\/p><p><strong>Control (Enable Command) Power<\/strong> <br \/>All control and enable command power is derived directly from the locomotive battery.<\/p><p><strong>Firing\/Regulator Board<\/strong> <br \/>The FCROVF6-TSCS-1 variable frequency firing\/regulator board uses the field-proven elements of the rail industry-standard FCOVF6100 variable frequency firing board and the VLTLCL-1 regulator board, originally developed for a mining truck battery charger application. This board also includes custom fault monitoring, control interface, and battery current regulation features not present in other Enerpro products. The printed circuit board is a sixlayer, 0.093\u201d-thick FR-4 epoxy laminate with plated through holes and solder mask over bare copper. All bare Enerpro circuit boards conform to UL94-V0. A polyurethane conformal coating (MIL-1-46056, Type UR) is applied to the printed circuit board to provide enhanced immunity to dirt and moisture.<\/p><p><strong>Snubber Board<\/strong> <br \/>In a thyristor converter, a high rate-of-rise in anode to cathode voltage, or dV\/dt, occurs when a thyristor ceases conduction or when another thyristor in the circuit is gated into conduction. The dV\/dt of the thyristor voltage must be limited to avoid erratic circuit operation and device damage. Connected anode to cathode, the snubber circuit resistors and capacitors limit this dV\/dt. Specifically designed for use in high vibration environments, the TSBHG-6 board uses rail mounted TO-220 style resistors and high-quality, board mounted WIMA film capacitors. This configuration minimizes the susceptibility of the solder joints to vibration and provides a convenient heat sinking scheme for the snubber resistors.<\/p><p><strong>Status LED Indicators<\/strong><\/p><p><img class=\" alignleft size-full wp-image-243\" style=\"float: left; border: 0pt none;\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/LED_Status.png\" width=\"200\" height=\"152\" border=\"0\" \/><\/p><p><img class=\" size-full wp-image-244\" style=\"border: 0pt none;\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/LED_Status_Description.png\" width=\"600\" height=\"226\" border=\"0\" \/><\/p><p><strong>System Connections and Setup <\/strong><br \/>Refer to connection diagram E1735. All internal connections are completed at the factory. Connections for ac and dc power are made directly to the bus bars, which are fitted with captive 1\/2-13 UNC threaded PEM nuts. Enable and status read-back signals are available on connector J1, which is a weather-tight, keyed, bayonet-style cylindrical connector (MIL 5015 series, 24-5 insert).<\/p><p>APPLICABLE DOCUMENTS<\/p><ul><li>E1735, Connection Diagram, \u201cELPEC 74 V Controlled Rectifier & Battery Charger\u201d<\/li><li>E1734, Schematic Diagram, \u201cFCROVF6-TSCS-1, Simplified Variable Frequency Firing Circuit with Three-Stage Charging\u201d<\/li><li>E459, Schematic Diagram, \u201cHigh Shock 6-Circuit Snubber Board, TSBHG-6\u201d<\/li><li>M1888, Mechanical Diagram, \u201cELPEC Phase Controller\u201d<\/li><\/ul><p>{tab=Electrical Specifications|grey}<\/p><p style=\"text-align: left;\">REFERENCE DRAWING E1735<\/p><p><img class=\" alignleft size-full wp-image-245\" style=\"float: left;\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/ELPEC_Electrical_Specs.png\" width=\"600\" height=\"306\" border=\"0\" \/><\/p><p>{tab=Electrical Connections|grey}<\/p><p><strong><span style=\"color: #800000;\">PRELIMINARY-- <\/span><\/strong>REFERENCE DRAWING E1735<\/p><p><img class=\" size-full wp-image-246\" src=\"https:\/\/www.enerpro-inc.com\/wp-content\/uploads\/2010\/12\/elpec_electrical_connections_v2.png\" width=\"600\" height=\"368\" border=\"0\" \/><\/p><p>{\/tabs}<\/p>","_et_gb_content_width":"","footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - 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