Appendix A-Instructions for ArcBlok Main Section

Conduit Closure Plate Label

Remove dirt and debris from the foundation and surrounding area before moving the switchboard into final position.

For the bottom-fed ArcBlok Main section:

• The bottom closure plate is installed at the bottom of the cable vault. For an ArcBlok Main switchboard greater than 24 in. (610 mm) deep, do not remove the center base channel as the cable conduit entry is inside the cable vault. The conduit closure plate is installed inside the cable vault.

• Remove and retain the conduit closure plate for reuse. The customer must create any holes necessary for conduit entering the bottom of the switchboard. After creating the holes, reinstall the conduit closure plate.(see Bottom-fed ArcBlok Main Bottom Closure and Conduit Closure Plate).

Bottom-fed ArcBlok Main Bottom Closure and Conduit Closure Plate

Label for Rear Access Plate

The front cover and rear panel assembly of the ArcBlok bottom-fed cable vault is removable to allow access to anchor tie-down points (see Cable Vault Rear Access Panel).

Cable Vault Rear Access Panel

1. Unplug the terminal block of ArcBlok Event Indicator and put it on the right side of the cable vault. Do not unplug any wires of the terminal block.

2. Remove and retain the 1/4-20 hardware securing the cable vault front cover.

3. Remove and retain the cable vault front cover.

4. Remove and retain the 1/4-20 hardware securing the cable vault rear access panel.

5. Remove and retain the rear access panel from the inside of the cable vault.

6. Install the anchoring/seismic hardware at the location shown in Switchboard Base Channels).

7. Reinstall the rear access panel using 1/4-20 hardware retained in steps 4 and 5. Torque cover hardware to 95–105 lb-in. (10.7–11.9 N•m).

8. Reinstall the cable vault front cover using 1/4-20 hardware retained in steps 2 and 3.

9. Re-plug the terminal block of ArcBlok Event Indicator removed in step 1.

For the ArcBlok Main Section, the ground extension bus and grounding electrode conductor connector (ground lug) are available inside the cable vault as indicated in Grounding Electrode Conductor Connector.

Grounding Electrode Conductor Connector

For the ground bus splice connections, follow instructions in Ground Bus Splice Connections.

• Locate and terminate all conduit in the switchboard enclosure in the "available conduit area" designated on the equipment drawing.

  NOTE: Do not remove any base channels when seismic restraint is required.

• The conduit area is available towards the front of the section inside the cable vault.

• Follow the instructions of cable conduit area access in Switchboard Preparation - Bottom Fed ArcBlok Main Section.

Refer to Cable Pulling. In addition, follow below steps for ArcBlok Main section:

1. Open the equipment breaker door and retain 1/4-20 size hardware.

2. Remove and retain 1/4-20 size hardware securing the equipment front covers available on the bottom of the circuit breaker door as shown in Removing Equipment Front Covers.

   Removing Equipment Front Covers

   

3. Remove and retain the equipment front covers.

4. Unplug the terminal block of the ArcBlok Event Indicator and put it on the right side of the cable vault. Do not unplug any wires of the terminal block.

5. Remove and retain 1/4-20 size hardware securing the cable vault front cover as shown in Removing Cable Vault Front Cover.

   Removing Cable Vault Front Cover

   

6. Remove and retain the cable vault front cover.

   NOTICE
   damage to event indicator Do not damage ArcBlok Event Indicator while installing or uninstalling the cable vault front cover. Call Schneider Electric Services if the Event Indicator is damaged. Failure to follow these instructions can result in equipment damage.

7. Pull the cables inside the cable vault and terminate them on the ArcBlok lugs installed inside the ArcBlok module. Torque all the wire-binding screws at 842 lb–in. (95 N•m) to install the cables as shown in Cross Section Showing Hole Placement).

   NOTICE
   damage to Phase Barriers Do not apply excessive force to the phase barriers during cable installation. Damage to the phase barriers can occur. Call Schneider Electric Services if the Phase Barriers are damaged. Failure to follow these instructions can result in equipment damage.

   1. Use a proper insulation stripping tool to strip a length of insulation from the end of the cable sufficient to fit into the full length of the lug barrel. Be careful not to nick or ring the strands.

   2. Thoroughly clean aluminum cable contact surfaces with a wire brush, or scrub them with an abrasive cloth to remove oxides and foreign matter.

   3. Immediately apply an acceptable joint compound to the bare aluminum surfaces.

      Cross Section Showing Hole Placement

      

   4. Install the rear cables into the rear three-hole lug. Wire strip length: 3.875 in. (98 mm).

   5. Install the cables into the front six-hole lug. Wire strip length: 2.50 in. (64 mm) for the rear three holes. Wire strip length: 1.375 in. (35 mm) for the front three holes.

   6. Screw any unused wire binding screws in completely. Screw in all wire binding screws without cables installed so they are not in the way of the Thermal Interface Module (TIM) (see TIM Sleeve in step 9).

8. Cable entry into the cable vault must use conduit connection means installed on the conduit closure plate in the bottom fed applications. The conduits must be sealed using duct seal putty as shown in Sealing Conduits with Duct Seal.

   Sealing Conduits with Duct Seal

   

9. Install the Thermal Interface Module (TIM):

   1. Verify TIM mating surfaces and lugs are clean and undamaged. Clean with a dry, lint-free rag.

   2. Install one TIM per phase and neutral using 1/4-20 size captive screws as shown in TIM Sleeve. Slide the plastic sleeve around each TIM against the top of the phase barriers. Sleeve must be flush with the top of the phase barriers. Torque all six TIM screws in a star pattern to 60 lb-in. (6.8 N•m).

      NOTE: The TIM mounting screws are not completely removable.

   Thermal Interface Module Installation

   

   TIM Sleeve

   

10. Install the ArcBlok module front cover assembly to enclose the ArcBlok module using 1/4-20 size screws provided as shown in ArcBlok Front Cover Installation. Install the cover by aligning the four alignment pins in the cover with the holes in the module side plates. Fasten five screws on the top row and another five in the middle row of the front cover. Use the remaining five screws for the bottom row while installing the cable vault front cover as mentioned in step 13. Torque all ten screws on the front cover to 60 lb-in. (6.8 N•m).

    NOTICE
    damage to tape on Thermal interface module (tim) Do not damage the tape on the TIM during installation of the ArcBlok front over during this step. Call Schneider Electric Services if cover assembly is damaged. Failure to follow these instructions can result in equipment damage.

    NOTICE
    damage to arcblok module front cover assembly Do not apply excessive force to the ArcBlok module front cover assembly during installation. Call Schneider Electric Services if cover assembly is damaged. Failure to follow these instructions can result in equipment damage.

    ArcBlok Front Cover Installation

    

11. Install one heatsink per phase and neutral on the front surface of the TIM using 1/4-20 size captive screws as shown in ArcBlok Heatsink Installation. Torque all six screws on the heatsink in a star pattern to 60 lb-in. (6.8 N•m).

    ArcBlok Heatsink Installation

    
    
    

    CAUTION
    risk of burns from hot surfaces of heatsinks Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices when working near heatsinks. See NFPA 70E or CSA Z462. Failure to follow these instructions can result in injury.

12. Install the thermal sensor (if used) as labeled per phase in the thermal sensor mounting clip available underneath the heatsink with the temperature probe towards the base of the heat sink as shown in Thermal Sensor Installation.

    NOTICE
    damage to sensor spring loaded probe Do not damage or let the sensor spring loaded probe tip out of place during the instillation to avoid temperature data discrepancy. Call Schneider Electric Services if the sensor is damaged. Failure to follow these instructions can result in equipment damage.

    Thermal Sensor Installation

    

13. Perform substeps:

    1. Reinstall the cable vault front cover using (15) 1/4-20 size screws retained in step 5 (see Reinstall Cable Vault Front Cover).

    2. Locate (5) 1/4-20, one in. long screws from ArcBlok Module kit and install at the top edge of the cable vault front cover to fasten the ArcBlok front cover. Torque all screws on cable vault front cover to 60 lb-in. (6.8 N•m) (see Reinstall Cable Vault Front Cover).

    Reinstall Cable Vault Front Cover

    

    Cable Vault Front Cover Labels

    

14. Re-plug the terminal block of the ArcBlok Event Indicator removed in step 4.

15. Make sure the ArcBlok Event Indicator plunger is pushed back as shown in ArcBlok Event Indicator.

    ArcBlok Event Indicator

    

16. Reinstall the equipment front covers using 1/4-20 size hardware retained in step 2.

17. Close the breaker door and secure it to the frame using 1/4-20 size hardware retained in step 1.

For non-ArcBlok applications, follow instructions in Cable Restraint for Short-circuit Current Rating (SCCR).

Cable restraint is required on the line-side of the ArcBlok section. All cables must be laced and secured prior to installing the cable vault front cover.

1. Wrap cables using 1/2 in. (13 mm) diameter sisal rope, 3/8 in. (9.5 mm) diameter nylon rope, or equivalent.

2. Lace the cables from all phases together in one bundle with a continuous length of rope.

3. Lacing requires two sets of looping groups: an entry loop set and a second looping group nearer to the ArcBlok.

4. Attach one end of the rope to the cable bundle (see First Cable Lacing).

   First Cable Lacing

   

5. After attaching the rope to the cables, start the entry loop at about six in. (152 mm) from the floor. Make a loop in the rope and pull the loop around the cable bundle from behind. Pull the loose end of the rope through the loop.

6. Continue to pull the rope through the loop until the rope is tight. Continue to make a loop group of no more than two loops, wrapping the cable bundle eight times per loop.

7. Create the second loop group by pulling the rope around the cable bundle. Make a loop by pulling the loose end under the rope. Continue to pull the rope through the loop until it is tight around the cable bundle. Repeat the procedure until the cable bundle has no more than two loops, wrapping the cable bundle four times. The spacing between the upper and lower loop groups must be no more than 13 in. (330 mm) (see Upper and Lower Cable Lacing Groups).

   Upper and Lower Cable Lacing Groups

   

8. After the entire cable bundle has been laced, tie the ends of the ropes securely to the looping groups, then cut and tape the ends to prevent fraying. Make sure the rope ends are not obstructing the cable vault front cover, fuse disconnect switch wiring, or ArcBlok Event Indicator plunger.

Conduct a complete inspection before the switchboard is energized to validate that all components function and operate properly. Refer to Pre-energizing Checkout Procedure. Additional steps are required for ArcBlok Main Section. Complete every step of the checkout procedure listed before energizing the switchboard.

Normal Operation

CAUTION
Risk of burns from hot surfaces of heatsINKs Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices when working near heatsinks. See NFPA 70E or CSA Z462. Failure to follow these instructions can result in injury.

Post Internal Arc Interruption

If an internal arc interruption occurs on incoming power of ArcBlok Main device, refer to Return to Service Protocol - R Frame ArcBlok Instruction Bulletin - PKR25993. In addition, inspect the Fuse Disconnect Switch and its wiring inside the cable vault for damage of discoloration. See Inspection Point After an Event. Contact Schneider Electric Services if any damage or discoloration is found. Refer to deployment guide 7EN42-0247-00 for the ArcBlok Event Indicator and CL110 thermal sensors commissioning procedure.

Inspection Point After an Event