Toshiba 300 KW Manuale Utente

G8000 Series Installation and Operation Manual

The  G8000  UPS  units  are  not  equipped  with  circuit  breakers.  Qualified  personnel  should  provide  the 

external breakers for the AC input/output, bypass input and DC input.
See Figure 11.1 – External Wiring Diagram, for the circuit position of the breakers.
Table 11.6 shows the G8000 UPS minimum external breaker rating for each capacity.  The bypass input and 

the AC output require 3-pole breakers.

Capacity

AC Input / Bypass Input / AC Output

Minimum Breaker Rating

DC Input

Minimum Breaker Rating

100 kVA

480 V - 200 A

500 VDC – 500 A

150 kVA

480 V - 300 A

500 VDC – 700 A

225 kVA

480 V - 450 A

500 VDC – 1100 A

300 kVA

480 V - 500 A

500 VDC – 1500 A

   

Be sure to ground the UPS as specified.
Using the UPS without a proper ground will deteriorate the insulation, 

cause leakage of currents and electric shock.The resistance to ground 

should be less than or equal to 10 ohms.

The 100/150/225kVA earth grounding bus is located inside, at the bottom-front of the unit. The 300 kVA 

earth grounding bus is located inside, at the top-left of the unit. 
Use a AWG 2 (or 38 mm

2

) or larger cable for the grounding wire. Run the grounding wire through the 

opening at the bottom, or through a hole in the top knockout plate (if available). See Figure 11.10. Connect 

either the top or bottom earth ground bus, but not both, to the grounding wire.
The ground wire must have a crimp terminal with a 1/2 in. (12 mm) diameter bolt hole. The ground bus has 

33/64 in. (13 mm) bolt hole. The connect the crimp terminal and ground bus together using a 7/16 in. (10 

mm) diameter bolt.