Main Circuit - Delta HES Series User Manual

Chapter 2 Wiring|HES Series

2-3 Main Circuit

Terminal Label
R/L1, S/L2, T/L3
U/T1, V/T2, W/T3 Output of Hybrid Servo Controller, connected to hybrid servo motor
+1, +2/B1
+2/B1, B2
AC line input terminals
For power improvement of the connection terminal of DC reactor. Please
remove the shorting plate in installation (DC reactors are built-in in models
with power ≧ 37KW)
Connection terminal of brake resistor. Please follow the selection table to
purchase suitable ones.
Earth connection, please comply with local regulations.
The wiring for the Main circuit must be isolated from that for the control loop to avoid
malfunction.
Please use isolation wires for control wiring as much as possible. Do not expose the
section where the isolation mesh is stripped before the terminal.
Please use isolation wire or wire tube for power supply wiring and ground the
isolation layer or both ends of wire tube.
Usually the control wire does not have good insulation. If the insulation is broken for
any reason, high voltage may enter the control circuit (control board) and cause
circuit damage, equipment accident, and danger to operation personnel.
Noise interferences exist between the Hybrid Servo Controller, hybrid servo motor,
and their wirings. Check if the pressure sensor and associated equipments for any
malfunction to avoid accidents.
The output terminals of the Hybrid Servo Controller must be connected to the hybrid
servo motor with the correct order of phases.
When the wiring between the Hybrid Servo Controller and hybrid servo motor is very
long, it may cause tripping of hybrid servo motor from over current due to large
high-frequency current generated by the stray capacitance between wires. In
addition, when the leakage current increases, the precision of the current value
becomes poor. In such case, an AC reactor must be connected to the output side.
The ground wire of the Hybrid Servo Controller cannot be shared with other large
current load such as electric welding tool. It has to be grounded separately.
To avoid lightning strike and incidence of electrocution, the external metal ground
wire for the electrical equipments must be thick and short and connected to the
ground terminal of the Hybrid Servo Controller system.
When multiple Hybrid Servo Controllers are installed together, all of them must be
directly connected to a common ground terminal. Please refer to the figure below to
make sure there is no ground loop.
Description
2-10