11.4External Breakers

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 11.7 shows the G8000 UPS minimum external breaker rating for each capacity. The Bypass, AC Input, and AC Output require 3-pole breakers.

TABLE 11.7 UPS MINIMUM DEVICE RATINGS

Capacity

Rated

Input Breaker

Output Breaker

DC Input

 

Output

Rating

Rating

Breaker Rating

80 kVA

480 V/277 V

480 V – 150 A

480 V – 125 A

500 VDC – 300A

100 kVA

480 V/277 V

480 V – 200 A

480 V – 150 A

500 VDC – 350A

125 kVA

480 V/277 V

480 V – 200 A

480 V – 200 A

500 VDC – 400A

150 kVA

480 V/277 V

480 V – 300 A

480 V – 250 A

500 VDC – 600A

225 kVA

480 V/277 V

480 V – 400 A

480 V – 350 A

500 VDC – 900A

300 kVA

480 V/277 V

480 V – 600 A

480 V – 500 A 500 VDC – 1200A

500 kVA

480 V/277 V

480 V – 800 A

480 V – 800 A 600 VDC – 1200A

11.5Grounding Wire

WARNING

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 80/100/150/225kVA earth grounding bus’ are 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.

The 500 kVA earth grounding bus is located inside, at the bottom front of the units.

Use a AWG 2 (or 38 mm2) or larger cable for the grounding wire. Run the grounding wire through the opening at the bottom, or through a hole in the top conduit landing plate (if available). See Figure 11.12. 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.

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G8000 Series Installation and Operation Manual

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Toshiba 125, 500 KW, 480 V, 225, 150, 300 External Breakers, Grounding Wire, DC I nput, Be sure to ground the UPS as specified
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480, 125, 225, 150, 480 V specifications

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