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External Breakers; Grounding Wire - Toshiba 4400 Series Installation And Operation Manual

Three phase - 15/20/25/30/50/80/100 kva
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9.5

External Breakers

The UPS is not equipped with isolation circuit breakers. Qualified personnel should provide the external breakers for the AC
input/output, bypass input and DC input.
Table 9.4 shows the minimum external breaker rating for each UPS. The bypass, input and output require 3-pole breakers.
Voltage
15kVA
208/120V
240V/90A
220/127V
240V/90A
240V
240V/80A
380/220V
480V/50A
400/227V
480V/50A
415/240V
480V/45A
480/277V
480V/40A
600V
600V/35A
Note: Above Amp trip ratings are sized for the worst case in the UPS System (Primpary Input Breaker) according to NEC
215.3 guidlines. For more exact recommendations, please refer to "Appendix C – Installation Planning Guide".
Voltage Capacity
(Min.)
500VDC
* For Battery Cabinet Systems not equipped with built-in over-current protection devices.
9.6

Grounding Wire

The earth grounding bus is located behind the dead front, close to the power lugs. See Section 8.5-8.7. Connect the
grounding wire to the earth ground bus.
The 15-50kVA UPS have a bus strip with 7 (seven) threaded holes for M4 bolts. Use a AWG 2 (or 38 mm
for the grounding wire. Connect the crimp terminal and ground bus together using a M4 bolt.
The 80-100kVA UPS has a ground bus with 10 (ten) M5x0.8 threaded holes, and 6 (six) 0.5118 in (13 mm) unthreaded
holes for 1/2 in bolts. Ground wire must have a crimp terminal with a corresponding diameter bolt hole. Connect the crimp
terminal and ground bus together using the appropriate diameter bolt.
4400 Series Installation and Operation Manual – 64527-008
TABLE 9.4: UPS MINIMUM BREAKER RATINGS
20kVA
25kVA
240V/125A
240V/150A
240V/125A
240V/150A
240V/100A
240V/125A
480V/70A
480V/80A
480V/60A
480V/70A
480V/60A
480V/70A
480V/50A
480V/60A
600V/40A
600V/50A
TABLE 9.5: DC (BATTERY) MINIMUM BREAKER RATINGS*
15kVA
20kVA
25kVA
100A
150A
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.
Capacity
30kVA
240V/175A
240V/250A
240V/150A
240V/250A
240V/150A
240V/225A
480V/90A
480V/150A
480V/90A
480V/150A
480V/80A
480V/125A
480V/70A
480V/110A
600V/55A
600V/85A
30kVA
50kVA
175A
200A
50kVA
80kVA
240V/400A
240V/400A
240V/350A
480V/225A
480V/200A
480V/200A
480V/175A
600V/150A
80kVA
350A
600A
100kVA
240V/500A
240V/450A
240V/400A
480V/300A
480V/250A
480V/250A
480V/200A
600V/175A
100kVA
700A
) or larger cable
2
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