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MINIVERTER MANUAL

PROCESS ELECTRONICS CORPORATION

100 BRICKYARD ROAD

MOUNT HOLLY, NORTH CAROLINA 28120

TELEPHONE (800) 421-9107

FAX (704) 827-9595

[email protected]

WWW.PECRECTIFIER.COM

SOLID STATE CONVERTER

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Содержание Miniverter

Страница 1: ...IVERTER MANUAL PROCESS ELECTRONICS CORPORATION 100 BRICKYARD ROAD MOUNT HOLLY NORTH CAROLINA 28120 TELEPHONE 800 421 9107 FAX 704 827 9595 SALES PECRECTIFIER COM WWW PECRECTIFIER COM SOLID STATE CONVERTER ...

Страница 2: ...ent Control with Voltage Limit Adjustment Procedure 10 4 6 Conversion to Current Mode of Control 11 5 MAINTENANCE 12 6 TROUBLESHOOTING 12 6 1 Method of Checking Diodes Using an Ohmmeter 13 6 2 Method of Checking Diodes Using a Continuity Tester 13 6 3 Method of Checking Silicon Controlled Rectifier SCR 14 Troubleshooting Chart 15 It must be understood that these instructions cannot cover all detai...

Страница 3: ...ral The P E C Miniverter power supply converter has been completely inspected and operated under full load prior to shipment These units should be installed in a clean dry ventilated location with the front and back of the units at least 6 from the wall or other objects that would obstruct air flow Do not install near furnaces radiators or any other sources of heat If the converter is installed in...

Страница 4: ...l Component Access 1 Remove the four screws from the front panel 2 Lower front panel for access to control components 2 2 2 Power Component Access 1 Remove the four screws from the rear panel 2 Remove rear panel for access to all power components CAUTION Never operate the converter without panels in position Figure 1 Access to Converter s Control and Power Components ...

Страница 5: ...h as required by the national electrical code should be provided by the user as a disconnect and for short circuit protection Run main power feeders from fused safety switch to converter control panel and connect to input terminals of main starter These leads should be of sufficient size as determined by the national electrical code See Section 3 2 entitled Control Wiring Line current may be deter...

Страница 6: ...m included with each converter shows the number of wires required to connect the converter and control unit together It is a good practice to include a spare wire or two for future requirements 3 3 D C Hook Up The D C terminals are 1 2 inch diameter copper studs protruding 1 1 2 inches from the rear of the cabinet Cable or bus of sufficient capacity to carry rated D C amperes should be used to mak...

Страница 7: ... Trigger Amplifier Board By controlling the firing of the Silicon Controlled Rectifiers SCR s the trigger amplifier board varies the converter output voltage and current Using the feedback signals from the D C output the converter output can be controlled and held constant at voltage with current limiting average current density with current limiting or current with voltage limiting The board prov...

Страница 8: ...omatically prevents the overload from damaging the converter while maintaining continuous operation at reduced output voltage B Automatic Average Current Density Control with Current Limiting The need for average current density control is due to the fact that the current in a plating system does not increase in direct proportion as the plating area is increased even though the plating voltage is ...

Страница 9: ...de of control unless otherwise specified at time of order 1 The current density adjust pot must be turned completely counterclockwise for automatic voltage operation This pot is located on the front panel of the integral control units or inside the remote cabinet for remote control units To adjust remove the locknut and turn the pot with a screwdriver completely counterclockwise then replace and t...

Страница 10: ...r current is reached 8 Repeat steps 5 6 and 7 to minimize the current difference from small to large loads 9 Replace and tighten locknut on current density adjust pot NOTE This control works well for repeated loads of the same type A change in size and shape of the workload may require readjustment of the pot settings 4 5 Automatic Current Control with Voltage Limit Adjustment Procedure All conver...

Страница 11: ...ent Mode of Control The conversion from voltage mode to current mode of control is easily accomplished 1 Open the front panel of the converter and locate the terminal strip mounted on the control panel 2 Locate the control wires No 7 and No 8 on the terminal strip See Figure 2 3 Remove wire No 7 blue from the terminal and wire No 8 blue from its terminal 4 Plug wire No 7 blue on wire No 8 terminal...

Страница 12: ...ench for proper tension If necessary to remove a SCR for any purpose replace with factory approved unit A small amount of Dow Silicone Grease No 200 should be placed on the contact side of the SCR stud to complete a thermally conductive film between the two mating surfaces 6 TROUBLESHOOTING All units are completely tested prior to shipment If a unit arrives inoperable or damaged contact Process El...

Страница 13: ...alue of a good diode may vary from one diode to another This variance gives no indication as to the quality of the diode These reading are only taken to indicate if a diode is short circuited or open 6 2 Method of Checking Diodes Using a Continuity Tester IMPORTANT Before testing any diodes check the continuity tester by touch ing the probe and clip together If it is functioning properly the light...

Страница 14: ...re 10 5 Place the red lead and black lead across the SCR See Figure 10 No light should register If the light comes on the SCR is shorted 6 If the light does not come on momentarily short the gate lead of the SCR to the anode stud and remove The light should come on and in many cases stay on If the light comes on the SCR is good Figure 9 SCR Terminal Identification Figure 10 Checking SCR on Test Fi...

Страница 15: ...tely 1 Intermittent loose connections 2 Excessive D C output 3 Faulty push buttons 1 Check and tighten wiring 2 Lower D C output 3 Replace push buttons Unit runs for a period and then drops out however it can be re started after three to five minute periods Faulty diode or SCR high limit thermo Replace thermo Converter energizes properly but has no output 1 Meter connections loose or broken 2 Defe...

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