Wiring The Air Compressor - Hitachi SRL Series Instruction Manual

Installation(continued)

5 Wiring the Air Compressor

Connecting the Main Power
1. Carry out the electrical work according the local and
national electric codes and standards.
2. Connect the power supply for the main motor through
an earth leakage (ground) circuit breaker between the
main power and the Oilfree Scroll Air Compressor.
3. Wiring capacities are as follows.
Model
SRL-7.5M6LL
SRL-7.5M6LH
SRL-11M6LL
SRL-11M6LH
SRL-16.5M6LL
SRL-16.5M6LH
SRL-7.5M6ML
SRL-7.5M6MH
SRL-11M6ML
SRL-11M6MH
SRL-16.5M6ML
SRL-16.5M6MH
Note) 1. Use a UL489 listed circuit breaker or UL listed dual-element time delay branch circuit type fuses.
2. The Circuit Breaker and Fuse capacity depend on "UL standard".
● Verify that the power supply for the facility corresponds with the power supply of the air
compressor.
Failure to adhere to this precaution may lead to starting failure, electric motor failure and/or damage to the air
compressor.
● The SRL air compressor should be wired per the local and national electric codes. Improper wiring
may lead to excessive voltage drops.
● Do not use a generator.
Wiring the Air Compressor
1. Internal air compressor wiring has been
completed prior to shipment from the
factory.
2. Remove the front panel, open the door
to the power supply panel and connect
the main power supply cable to the
terminal block.
Power
Minimum Wire Thickness
(mm/AWG)
3.9/AWG8
208/230V
3 Phase 4.9/AWG6
60 Hertz
6.8/AWG4
3.9/AWG8
460V
3 Phase 4.9/AWG6
60 Hertz
6.8/AWG4
Wiring Capacity
Minimum Ground Line Wire
Thickness
(mm/AWG)
3.9/AWG8
4.9/AWG6
6.8/AWG4
3.9/AWG8
4.9/AWG6
6.8/AWG4
CAUTION
Front panel
Terminal
Block
8
Earth Leakage (Ground)
Circuit Breaker
Circuit Breaker
Capacity
(A)
75
100
100
40
50
50
Main Power
Supply Cable
T i g h t e n t h e n u t a f t e r
connecting the power
cable.
Fuse
Capacity
(A)
75
100
100
40
50
50