Toshiba HV6AS instruction manual Main Circuit Cable Connections, Installation, Page

INSTALLATION Page 15

MAIN CIRCUIT CABLE CONNECTIONS

Cables which connect to the circuit breaker should be routed to avoid interference with sharp edges and moving parts. Minimum bending radius for the type of cable used should be observed.

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.

To connect cables, follow the steps below:

1.Pass the cable through the insulating cylinder (six cylinders are supplied with the circuit breaker) (Fig. 15).

2.Fasten the cable to the main circuit terminal (Fig. 16). 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 bolt from rotating with a wrench, torque the nut to 250-315 kgf-cm (18-23 ft-lb) for M10 bolts or 450-565 kgf-cm (32-41 ft-lb) for M12 bolts.

Use two wrenches to torque the connection to prevent

CAUTION applying excessive force to the terminal which can damage the frame.

3.Fasten the insulating cylinder in place, then check to make sure that the hook is engaged (Fig. 17).

Fig. 15 Pass Cable Through Insulating

Cylinder

Fig. 16 Fasten Cable to Main Circuit

Terminal

Fig. 17 Fasten Insulating Cylinder