Wiring Of The Main Circuit - Hitachi SH1 Series Basic Manual

Chapter 2

2.5 Wiring of the main circuit

Wire the main circuit of the inverter.
The following illustration shows the power supply and
wiring connections to a motor only.
Open a terminal block cover to wire the terminal block in
the main circuit.
Earth-leakage
circuit breaker
ELB
Three-phase
AC power
supply
400V class:
J51 connector
380 to 460Vac
Control circuit
power supply
*1)SH1-03410-H(SH1-1600H)～SH1-06600-H(SH1-3150H)do not built-in EMC filter。
Explanation of main circuit terminal block
Symbol Terminal name
R,S,T
Main power input
(L1,L2,L3)
U,V,W
Inverter output
(T1,T2,T3)
PD,P DC choke
(+1,+) connection terminal
External chopper
P,RB
braking resistor
(+,RB)
connection terminal
Regenerative braking
P,N
unit connection
(+,-)
terminal
Inverter ground
terminal
 See "Chapter 1 Safety Instructions" for response to CE standards
(SH1-03160-H (SH1-1320H) and below).
 The screw size may vary depending on terminal. Refer to Chapter
2.6 for the size of the terminal screw for the power line cable while
for other terminals, refer to the drawings of the wiring on Chapter
2.9.
 The tables on Chapter 2.6 list the specifications of cables, crimp
terminals, and terminal screw tightening torques for reference.
 Recommended wire gauges vary depending on the rated load
settings (ND/LD/VLD).
SH1-03410-H(SH1-1600H)~ SH1-06600-H(SH1-3150H) support only
normal duty(ND) and low duty(LD).
Magnetic
contactor
MC
R/L1
S/L2
T/L3
R0
T0
T0
Description
Connect to the AC power supply. Leave these terminals unconnected
when using a regenerative converter（HS900A series）.
Connect a Three-phase motor.
Remove the PD-P jumper from terminals, and connect the optional DC
choke for power factor improvement.
Connect the optional external braking resistor. See "Chapter 7
Specifications" for built-in braking circuit inverter models.
Connect the optional regenerative braking unit.
This serves as a ground terminal for the inverter chassis to ground.
Connect 400V class models to Type-C grounding.
Internal EMC filter *1)
Jumper or terminal
N/-
Disable Enable
Main circuit
terminal section
 The wire diameters shown in tables in Chapter 2.6 Wire Diameter,
Wiring Tools, and Crimping Terminals" indicate design values for
HIV wire (resistant to 75°C heat).
 When connecting wires to the main circuit terminal block, use a
round crimping terminal in accordance with the wires for use. Use a
crimp tool recommended by the manufacturer of the crimping
terminal to crimp the terminal.
 When replacing from SJ700 to SH1, if the wire diameter is different,
etc. Please contact your supplier or local Hitachi inverter sales
office.
2-9
Installation and Wiring
Jumper
RB
P/+
PD/+1
Three-phase
AC motor
U/T1
V/T2
W/T3
Type-C grounding
(400 V class model)
M
3φ