Toshiba HV6FS-MLD instruction manual Installation, Main Circuit Cable Connections

INSTALLATION Page 13

MOUNTING THE CIRCUIT BREAKER CELL

The circuit breaker cell is designed to mount to the floor or shelf of the installation compartment. The floor or shelf to which the cell is mounted should be flat and level within ± 0.5 mm (± 0.02 in.). If there are any noticeable gaps between the cell base and the mounting surface, fill them in using flat washers as spacers.

Fasten the cell using four (4) M8 hex head bolts (Fig. 11). The tightening torque should be 120- 150 kgf-cm (9-11 ft-lb).

MAIN CIRCUIT CABLE CONNECTIONS

Route cables that connect to the circuit breaker cell to avoid interference with sharp edges and moving parts. Observe minimum bending radius for the type of cable used.

Power cables should be braced and/or laced to withstand short-circuit forces wherever such cables are unsupported. Power cables should be adequately sized to carry the maximum continuous current in accordance with NEC requirements and should have an adequate voltage rating. Cables should be dressed and terminated as appropriate to the voltage class and cable manufacturer’s recommendations. When terminating shielded cables, use termination kits appropriate for the system voltage to taper the insulation and reduce electrical stress. Follow the manufacturer’s installation instructions provided with the termination kit.

Fasten the cables to the main circuit terminals (Fasten the cables to the main circuit terminals Fig. 12). Use 35 mm Class 8.8 M10 or M12 hex head bolts, 2 flat washers, a lock washer and a nut. While securely preventing the nut from rotating with a wrench, torque the bolt to 250-315 kgf-cm (18-23 ft-lb) for M10 bolts or 450-565 kgf-cm (32-41 ft-lb) for M12 bolts.

CAUTION Use two wrenches to torque the connection to prevent applying excessive force to the terminal that can damage the frame.

Fig. 11 Fastening Cell to Compartment Floor or Shelf

Fig. 12 Fastening Cables to Main Circuit Terminals

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