Hitachi E-U Series Instruction Manual page 16

Motor control wiring diagram for 3 Phase models for standard connection
NOTES:
(1) Indicate the minimum wiring size range.
(2) Automatic thermal protection
In models VB-001SE-U thru VB-007SE-U, the thermal protector is in direct line with the
power to the motor windings. If a thermal overload occurs, the thermal protector opens at
248 F ± 9 F (120
o o
restored when the thermal protector measures 170.6
resume at full speed.
(See page 14)
(3) Pilot duty thermal protection
In models VB-019SE-U, and VB-004E-U thru VB-030E-U, the thermal protector must be put in
series with the electromagnetic switch. The thermal protector opens at 248
5 C) and closes at 170.6
o
manually in most cases, but some electrical circuits may vary.
electrical drawings or contact a certified electrician to troubleshoot the circuit.
(See page 15)
(4) Models VB-040-E2 thru VB-110-E2 do not have an integrated thermal protector.
Electromagnetic
Earth leakage
Switch
Breaker
Example of protection equipment
C ± 5 C) and power is interrupted to the motor windings. Power will be
o o
F ± 27 F (77 C ± 15
o o o
A
VB
F ± 27 F (77
o o
C). The electromagnetic switch must be reset
o
- 16 -
Class 3 Ground
C ± 15 C) and the motor will
o o
F ± 9 F (120
o o
Please review the system
C ±
o