Toshiba JKSSS Series Instruction Manual page 31

Basic Installation and Operation
Guide
Incoming Line
On the standard JKSSS, incoming power cable connections should be made at the points shown on the wiring diagram
furnished with the equipment.
Note: Proper phase sequence must be observed when connecting the input power. For example, phase A
must lead phase B, which in turn must lead phase C by 120° respectively. If the phase rotation is not
correct, a fault light and the OLED display will indicate the problem. The SCR output will be clamped.
Load Connections
The load cables should be routed through the wireways furnished within the enclosure. For load cable termination
arrangements, refer to the drawings furnished with the equipment.
Ground Connections
The controller line-up must be grounded in accordance with the requirements of the National Electrical Code. Proper
equipment grounding must be established before making any incoming power connection. If a main ground bus is
furnished, make the ground connection to this bus. If there is no ground bus, the sections which are shipped separately
should be connected in such a way as to ensure a continuous grounding path.
Each section contains a vertical ground bus extending from the main ground bus or ground pad to each controller
compartment.
Special attention should be paid to protection for operating personnel, to protection of equipment itself, (e.g. such as
ground fault relays) and protection of sensitive transducers or control devices that are electronic in nature.
The following may be used as a general guide with regard to equipment grounding.
Controller used as service equipment for a grounded system or as a main section for a separately derived system:
a. The grounding electrode conductor (ground wire) sized in accordance with NEC 250 should be run from the grounding
electrode to the controller ground bus or ground terminal.
b. Unless already done at the factory, a main bonding jumper should be installed from the incoming grounded connector
bus (neutral) to the ground bus or designated grounding point. If a jumper is not furnished, one having a size in
accordance with NEC 250 should be selected.
c. Steps (a) and (b) should effectively connect together the grounding electrode, the controller frame, all outgoing
equipment grounding conductors and the grounded neutral bus of the system.
d. No connection should be made to ground on the load side of any neutral disconnecting line or any sensor used for
ground fault protection. No connections should be made between outgoing grounding connectors and the neutral.
e. Where the controller or system is dual-fed (double-ended) and has ground fault protection, special precautions are
necessary to accomplish proper grounding and bonding.
Controller used as service equipment for an ungrounded system or as a main section for a separately derived system:
a. A grounding electrode conductor (ground wire) sized in accordance with NEC 250 should be run from the grounding
electrode to the controller ground bus or ground terminal.
TOSHIBA
JKSSS Series Solid State Soft Starters
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