Amada Miyachi Unitek STA-100A, Руководство по эксплуатации, Страница: 84 / 154

APPENDIX B: ELECTRICAL AND DATA CONNECTIONS
STA SERIES AC CONTROLS
B-2 990-351
Typical Electrical Power Connections
1 Connect the control to the weld transformer using the appropriate wire gauge for your
requirements.
2 Connect one side of each weld transformer primary to H1-1 and H1-2, respectively.
3 Connect the other side of each weld transformer primary together and to H2-1 and H2-2 or the
optional Terminal Block L2.
NOTE: If the Control is not equipped with an L2 terminal block, connect H2-1 and H2-2 to
the incoming L2 line and connect an 18 gauge wire from there to H4 of the valve transformer.
4 Connect the Control to the appropriate power source (230 V or 460 V) using the appropriate
wire gauge for your power requirements. (See Appendix C.)
5 Connect the power source wires to L1 and L2 of the circuit breaker and to chassis ground.
NOTE: If your unit was ordered without a circuit breaker, connect the wires to L1 of the SCR
assemblies, optional terminal block L2, and ground. If you do not have terminal block L2,
connect the incoming L2 wire to H2-1 and H2-2, and connect an 18-gauge wire from there to
H4 of the valve transformer.
L1 L2
AC Timer
Main Board
Circuit
Breaker
Expansion
Boards
H2-1
H2-2
L2
H1-2 H1-1 SCR Assemblies
T3 Valve
Transformer
L1
Chassis
Ground
Point
H4
L2
Terminal
Block