Installation of Utility Current Transformers on FlexSeT PUC Switchboards

This bulletin contains instructions for installing utility current transformer devices on FlexSeT Public Utility Compartment (PUC) Switchboard manufactured by Schneider Electric. Read and understand document number JYT1078000 FlexSeT Switchboards Instruction Bulletin before performing any of the instructions provided in this document.

The utility current transformer devices are to be installed in the utility compartment of the FlexSeT PUC Switchboard, as shown in the FlexSeT PUC Switchboard Utility Compartment.

FlexSeT PUC Switchboard Utility Compartment

Inside the utility compartment a set of mounting brackets and other components are provided for the installation of the different types of utility CTs on the three phases (A, B, and C). Become familiar with these components by looking at Utility CT’s Mounting Components and Jumpers Inside the Utility Compartment of a FlexSeT PUC Switchboard.

Utility CT’s Mounting Components and Jumpers Inside the Utility Compartment of a FlexSeT PUC Switchboard (same components on each phase)

Refer to Utility Current Transformers Installation Steps for the specific steps to follow for the installation of each type of utility CT on each phase (A, B, and C).

NOTE: Depending on the CT type, some of the pre-installed components will not be required, as mentioned in the corresponding steps.

Utility Current Transformers Installation Steps

CT Type	Mounting Bracket Required*	Installation Steps for All Phases (A, B, and C)*
MV-7 and DCHB	✔ Bracket No. 1	Remove and discard the two front and the two rear jumpers by removing the four Visi-Tite™ nuts and ½ x 2.25 in. bolts, retain this hardware for reuse in Step 3. Use four ¼–20 x 0.5 in. screws to attach the CT to the CT bracket No. 1 and tighten securely. Reinstall the four ½ x 2.25 in. bolts and Visi-Tite nuts removed in Step 1. Torque each Visi-Tite nut until the outer nut breaks off, discard the broken nuts and red tags. If the outer nuts are already broken off, torque the bolts to 60–70 lbs-ft. (81–95 N•m).
JAK-0C and R6MC	✔ Bracket No. 2	Remove the two front and the two rear jumpers, as well as the four Visi-Tite nuts and ½ x 2.25 in. bolts, retain them for reuse in Step 4. Remove and discard the two CT brackets No. 1 by removing the four 5/16 x 1 in. bolts and washers (discard this hardware). Use four ¼-.20 x 0.5 in. screws to attach the CT to the CT bracket No. 2 and tighten securely. Reinstall the two front and the two rear jumpers, as well as the four ½ x 2.25 in. bolts and Visi-Tite nuts removed in Step 1. Torque each Visi-Tite nut until the outer nut breaks off, discard the broken nuts and red tags. If the outer nuts are already broken off, torque the bolts to 60–70 lbs-ft. (81–95 N•m).
DCCW	✔ Bracket No. 3	Remove the two front and the two rear jumpers, as well as the four Visi-Tite nuts and ½ x 2.25 in. bolts, retain them for reuse in Step 6. Remove and discard the two CT brackets No. 1 by removing the four 5/16 x 1 in. bolts and washers (discard this hardware). Remove and discard the CT bracket No. 2 by removing the four 5/16 x 1 in. bolts and washers (retain this hardware for reuse in Step 4). Attach the CT bracket No. 3 by reinstalling the four 5/16 x 1 in. bolts and washers, torque bolts to 12–13 lbs-ft. (16–18 N•m). Use four ¼–20 x 0.5 in. screws to attach the CT to the CT bracket No. 3 and tighten securely. Reinstall the two front and the two rear jumpers, as well as the four ½ x 2.25 in. bolts and Visi-Tite nuts removed in Step 1. Torque each Visi-Tite nut until the outer nut breaks off, discard the broken nuts and red tags. If the outer nuts are already broken off, torque the bolts to 60–70 lbs-ft. (81–95 N•m).
DCEW and R6L and JAD-0C	X	Remove the two front and the two rear jumpers, as well as the four Visi-Tite nuts and ½ x 2.25 in. bolts, retain them for reuse in Step 4. Remove and discard all the CT brackets No. 1, No. 2 and No. 3 by removing all 5/16 x 1 in. bolts and washers (discard this hardware). Use four ¼–20 x 0.5 in. screws to attach the CT to the back panel and tighten securely. Reinstall the two front and the two rear jumpers, as well as the four ½ x 2.25 in. bolts and Visi-Tite nuts removed in Step 1. Torque each Visi-Tite nut until the outer nut breaks off, discard the broken nuts and red tags. If the outer nuts are already broken off, torque the bolts to 60–70 lbs-ft. (81–95 N•m).
DCEW-HQ	X	Remove the two front and the two rear jumpers, as well as the four Visi-Tite nuts and ½ x 2.25 in. bolts, retain them for reuse in Step 5. Remove and discard the two CT brackets No. 1 by removing the four 5/16 in. bolts and washers (discard this hardware). Remove and discard the CT brackets No. 2 and No. 3 by removing the four 5/16 x 1 in. bolts and washers (retain this hardware for reuse in Step 4). Use the four 5/16 x 1 in. bolts and washers to attach the CT to the back panel, torque bolts to 12–13 lbs-ft. (16-18 Nm). Reinstall the two front and the two rear jumpers, as well as the four ½ x 2.25” bolts and Visi-Tite nuts removed in step 1. Torque each Visi-Tite nut until the outer nut breaks off, discard the broken nuts and red tags. If the outer nuts are already broken off, torque the bolts to 60-70 Lbs-ft . (81–95 N•m).
IRH-10	X	Remove the two front and the two rear jumpers, as well as the four Visi-Tite nuts and ½ x 2.25 in. bolts, retain them for reuse in Step 5. Remove and discard the two CT brackets No. 1 by removing the four 5/16 in. bolts and washers (discard this hardware). Remove and discard the CT brackets No. 2 and No. 3 by removing the four 5/16 x 1 in. bolts and washers (retain this hardware for reuse in Step 4). Use the four 5/16 x 1 in. bolts and washers to attach the CT to the back panel, torque bolts to 12–13 lbs-ft. (16–18 N•m). Reinstall the two front and the two rear jumpers, as well as the four ½ x 2.25 in. bolts and Visi-Tite nuts removed in Step 1. Torque each Visi-Tite nut until the outer nut breaks off, discard the broken nuts and red tags. If the outer nuts are already broken off, torque the bolts to 60–70 lbs-ft. (81–95 N•m).