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Powering the Chassis

 

Powering the BTI7814 Chassis

Connecting the DC Power Feeds to a BTI7814 DC PEM

If you order the BTI7814 chassis with the DC option, the chassis is shipped with the 14-Slot Chassis DC Power Entry Modules DC PEM installed. This topic describes how to connect the power feeds to the DC PEMs.

Note

BTI7800 equipment should be powered in accordance with DC-I (isolated DC return) equipment installation criteriathe DC return terminal is not connected to the equipment frame or the equipment grounding means.

To understand how the power is distributed throughout the chassis, refer to BTI7814 Power Distribution Plan. For procedures to replace a DC PEM, refer to Replacing the BTI7814 DC PEM.

Warning
  • This equipment is intended to be installed and serviced by qualified personnel.

  • To avoid personal injury or damage to chassis components, ensure there is no power going to the chassis.

  • Make sure you are familiar with the site and safety guidelines described in the BTI7800 Series Hardware Overview and Installation Guide.

Warning

Before you proceed:

  • Do not work alone.

  • The chassis must be grounded to the frame in which it is mounted.

  • The power source to which you are connecting the chassis must be powered off.

  • The circuit breaker switch, to which the power source is wired, must be shut off.

  • Locate the emergency power-off switch for the location in which you are working.

  • Do not overload the power source to which you are connecting the chassis.

  • Check your work area for possible hazards, such as ungrounded power extension cables and moist floors.

  • Remove all jewelry, neckties, and scarves.

  • Use appropriate caution. This documentation does not cover every potential hazardous condition.

Installation Tools and Kits

  • Number 1 and Number 2 Phillips screwdrivers

  • 10 mm nut-driver

  • Wire stripping and crimping tool

  • Multimeter

  • Chassis Installation Kit (BT8A7865)

  • Chassis Crimp Lug Installation Kit (BT8A7867). The dual stud lugs supplied in the Chassis Crimp Lug Installation Kit are for use with 2 AWG cables. The 2 AWG lugs can crimp down to 4 AWG.

  • A set of power cables that meets the requirements specified in BTI7814 DC PEM Specifications

  1. Verify that there is no power going to the chassis.
  2. Verify that the chassis is properly grounded. For information on frame-grounding the chassis, refer to Frame Grounding a BTI7814 Chassis.
  3. Prepare the power cables as needed for attachment to the chassis.
    1. Use a wire stripper tool to strip one end of the power cable to the correct length (5.0 mm, 0.2 inch) for crimping on the supplied (dual stud) ring lugs.

    2. Insert the stripped end of the power cable into the open end of the lug.

    3. Use a ring lug crimping tool (do not use pliers) to secure the power cable to the lug.

  4. Remove the protective shields covering the DC PEMs (if applicable).
  5. Connect the power feeds as follows.Note

    All four feeds must be connected for proper operation.

    Figure 1: DC PEM Power Feed Connections
    DC PEM Power Feed Connections
    1. Connect the first set of Feed and Return cables to the first DC PEM.

      Note

      The other end of these two cables will be connected to the plant power source. Place this end of the cables out of the way until you are ready to connect them to the power source.

    2. Repeat for the other DC PEMs.

  6. Reinstall the protective shields on the DC PEMs.

    The shields should be oriented such that the instrument access holes are aligned with the DC terminals.

  7. Follow the appropriate procedures in your plant to prepare and connect the other end of the power cables to the DC power source.
  8. Power on the DC power distribution unit in your plant to power on the chassis.
  9. Perform a voltage checklist. You can check the voltage through the instrument access holes in the protective shields on the DC PEMs.

    With a portable multimeter, measure the voltage at each DC PEM as follows:

    • - Minus Feed: -42VDC to -60VDC as measured from the Feed to the Return.

    • + Positive Return: Within less than 2V of the frame or chassis ground.

You have successfully completed this procedure.

Connecting the AC Power Feeds to a BTI7814 AC PEM

If you order the BTI7814 chassis with the AC option, the chassis is shipped with the 2900W (53.5V) AC Rectifier Modules installed. This topic describes how to connect power to the BTI7814 2900W (53.5V) AC Rectifier Module.

To understand how the power is distributed throughout the chassis, refer to BTI7814 Power Distribution Plan. For procedures to replace an AC PEM, refer to Replacing the BTI7814 AC PEM.

Warning
  • This equipment is intended to be installed and serviced by qualified personnel.

  • To avoid personal injury or damage to chassis components, ensure there is no power going to the chassis.

  • Make sure you are familiar with the site and safety guidelines described in the BTI7800 Series Hardware Overview and Installation Guide.

Warning

Before you proceed:

  • Do not work alone.

  • The chassis must be grounded to the frame in which it is mounted.

  • The power source to which you are connecting the chassis must be powered off.

  • The circuit breaker switch, to which the power source is wired, must be shut off.

  • Locate the emergency power-off switch for the location in which you are working.

  • Do not overload the power source to which you are connecting the chassis.

  • Check your work area for possible hazards, such as ungrounded power extension cables and moist floors.

  • Remove all jewelry, neckties, and scarves.

  • Use appropriate caution. This documentation does not cover every potential hazardous condition.

Installation Tools and Kits

Procedure

  1. Verify that there is no power going to the chassis.
  2. Verify that the chassis is properly grounded. For information on frame-grounding the chassis, refer to Frame Grounding a BTI7814 Chassis.
  3. Ensure the power switch on the AC PEM housing for each rectifier is off.
  4. Attach the AC power cables to the AC receptacles on the housing.
  5. To prevent the power cables from being accidentally disconnected, attach the power cables to the cable strain relief clips.

    The AC PEM housing is shipped with individual cable strain relief clips that hold the power cables firmly in place. These clips can be used for both straight and right-angle connectors.

    1. Attach the cable strain relief clips to the AC PEM housing.

      The housing has four holes designed to hold the four clips in place.

    2. Attach the AC power cables to the respective clips.

  6. Follow the appropriate steps to connect the other end of the cables to the power source in your plant. Ensure the power source to which you are connecting the cables is powered off.
  7. Turn on the main power source.
  8. Switch on one rectifier at a time.

    The AC PEM LED starts to light up. The AC OK light turns solid green when the module is ready. Wait for the AC OK light before proceeding to power the next rectifier.

You have successfully completed this procedure.

Powering the BTI7802 Chassis

Installing and Cabling the BTI7802 DC PEM

This topic describes how to install, cable and connect power to the BTI7802 1-Slot/2-Slot Chassis DC Power Entry Modules (BT8A78PEM1-DC).

Note

BTI7800 equipment should be powered in accordance with DC-I (isolated DC return) equipment installation criteriathe DC return terminal is not connected to the equipment frame or the equipment grounding means.

For procedures to replace a DC PEM, refer to Replacing the BTI7802 PEM.

Warning
  • This equipment is intended to be installed and serviced by qualified personnel.

  • To avoid personal injury or damage to chassis components, ensure there is no power going to the chassis.

  • Make sure you are familiar with the site and safety guidelines described in the BTI7800 Series Hardware Overview and Installation Guide.

Warning

Before you proceed:

  • Do not work alone.

  • The chassis must be grounded to the frame in which it is mounted.

  • The power source to which you are connecting the chassis must be powered off.

  • The circuit breaker switch, to which the power source is wired, must be shut off.

  • Locate the emergency power-off switch for the location in which you are working.

  • Do not overload the power source to which you are connecting the chassis.

  • Check your work area for possible hazards, such as ungrounded power extension cables and moist floors.

  • Remove all jewelry, neckties, and scarves.

  • Use appropriate caution. This documentation does not cover every potential hazardous condition.

Installation Tools and Kits

  • Wire stripping and crimping tool

  • Multimeter

  • DC Power Cable Assembly (BT8A78PWR1)

Table 1: BTI7802 DC Power Cable Assembly (BT8A78PWR1)

DC PEM Cable Connector

DC PEM Cable

Procedure

  1. Verify there is no power going to the chassis.
  2. Verify the chassis is properly grounded. For information on frame-grounding the chassis, refer to Frame Grounding a BTI7802 Chassis.
  3. Using a wire stripper tool, strip the other end of the DC PEM connector and cable and prepare it, as needed, for connection to the DC power distribution unit in your plant.
  4. Install the DC PEM.

    Loosen the latch thumbscrew and pull the latch to the open position.

  5. Position the module edges onto the slot guides, and gently slide the module along the guides until the DC PEM connects to the backplane.
  6. Push in the latch to lock the module in place. Carefully tighten the thumbscrew.Note

    You will not be able to plug in the DC cable connector if the latch is not locked in place.

  7. Attach the DC PEM connector to the DC PEM module.
  8. Follow the appropriate steps to connect the other end of the cable to the DC power distribution unit in your plant. Ensure that the power source to which you are connecting the cable is powered off.
  9. Power on the chassis from the main power source.

    The DC PEM LEDs start to light up. The DC OK light turns solid green when the module is ready.

  10. Perform a voltage checklist. The voltage can be checked only at the breaker/fuse panel end where the DC power cable is terminated.

    With a portable multimeter, measure the voltage as follows:

    • - Minus Feed: -42VDC to -60VDC as measured from the Feed to the Return.

    • + Positive Return: Within less than 2V of the frame or chassis ground.

  11. Repeat this procedure for the second DC PEM.

You have successfully completed this procedure.

Installing and Cabling the BTI7802 AC PEM

If you order the BTI7802 chassis with the AC option, the chassis is shipped with the 1-Slot/2-Slot Chassis AC Power Entry Modules (AC PEMs). This topic describes how to install, cable and connect power to the BTI7802 AC PEM (BT8A78PEM1-AC).

For procedures to replace a AC PEM, refer to Replacing the BTI7802 PEM.

Warning
  • This equipment is intended to be installed and serviced by qualified personnel.

  • To avoid personal injury or damage to chassis components, ensure there is no power going to the chassis.

  • Make sure you are familiar with the site and safety guidelines described in the BTI7800 Series Hardware Overview and Installation Guide.

Warning

Before you proceed:

  • Do not work alone.

  • The chassis must be grounded to the frame in which it is mounted.

  • The power source to which you are connecting the chassis must be powered off.

  • The circuit breaker switch, to which the power source is wired, must be shut off.

  • Locate the emergency power-off switch for the location in which you are working.

  • Do not overload the power source to which you are connecting the chassis.

  • Check your work area for possible hazards, such as ungrounded power extension cables and moist floors.

  • Remove all jewelry, neckties, and scarves.

  • Use appropriate caution. This documentation does not cover every potential hazardous condition.

Installation Tools and Kits

  1. Verify that there is no power going to the chassis.
  2. Verify that the chassis is properly grounded. For information on frame-grounding the chassis reference Frame Grounding a BTI7802 Chassis.
  3. Install the AC PEM.

    Loosen the latch thumbscrew and pull the latch to the open position.

  4. Position the module edges onto the slot guides, and gently slide the module along the guides until the AC PEM connects to the backplane.

    Push-in the latch to lock the module in place. Carefully tighten the thumbscrew.

  5. Attach the AC cable to the AC receptacle on the AC PEM module.
  6. Follow the appropriate steps to connect the other end of the cable to the power source in your plant. Ensure the power source to which you are connecting the cable is powered off.
  7. Power on the chassis from the main power source.

    The AC PEM LEDs start to light up. The AC OK light turns solid green when the module is ready.

  8. Perform a voltage checklist. The voltage can be checked only at the breaker/fuse panel end where the AC power cable is terminated.

    See BTI7802 AC PEM Specifications for the recommended AC PEM voltage values.

  9. Repeat this procedure for the second AC PEM.

You have successfully completed this procedure.

Powering the BTI7801 Chassis

Installing and Cabling the BTI7801 DC PEM

The BTI7801 uses the same DC PEM as the BTI7802. See Installing and Cabling the BTI7802 DC PEM for installation and cabling instructions.

Installing and Cabling the BTI7801 AC PEM

The BTI7801 uses the same AC PEM as the BTI7802. See Installing and Cabling the BTI7802 AC PEM for installation and cabling instructions.