Emerson GXT2-PP20KRT208 user manual Calculating total load per UPS

Communication

Figure 15 Calculating total load per UPS

Input

2 UPSes Connected to a Parallel Pod

L1	L1
N	N
L2	L2

GG

UPS1 UPS2

I/P O/P I/P O/P I/P O/P

Maintenance

Breaker

Optional L1

Output N

Distribution L2

Module G

Input

Output

L1

N

Load L2

G

3 UPSes Connected to a Parallel Pod

L1	L1	L1
N	N	N
L2	L2	L2
G	G	G
UPS1	UPS2	UPS3

I/P O/P I/P O/P I/P O/P

Maintenance

Breaker

Optional L1

Output N

Distribution L2

Module G

Output

L1

N

Load L2

G

Table 3

Calculating total load, 20kVA example

20kVA Load, Full Load of Parallel Pod

2 UPSs Connected to Parallel POD

3 UPSs Connected to Parallel POD

UPS 1

UPS 2

Total Output

UPS 1

UPS 2

UPS 3

Total Output

L1-N

L2-N

L1-N

L2-N

Load

L1-N

L2-N

L1-N

L2-N

L1-N

L2-N

Load

5

5

5

5

20

3.3

3.3

3.3

3.3

3.3

3.3

20

Total load supported by the parallel POD for each of these configurations is 20kVA. If two UPSs are connected to

the parallel POD, each provides 10kVA. If three UPSs are connected to the parallel POD, each provides 6.67kVA.

This example is the full load capacity of the parallel POD.

Table 4

Calculating total load, 12kVA example

12kVA Load, Full Load of Parallel Pod

2 UPSs Connected to Parallel POD

3 UPSs Connected to Parallel POD

UPS 1

UPS 2

Total Output

UPS 1

UPS 2

UPS 3

Total Output

L1-N

L2-N

L1-N

L2-N

Load

L1-N

L2-N

L1-N

L2-N

L1-N

L2-N

Load

3

3

3

3

12

2

2

2

2

2

2

12

Total load supported by the parallel POD for each of these configurations is 12kVA. If two UPSs are connected to

the parallel POD, each provides 6kVA. If three UPSs are connected to the parallel POD, each provides 4kVA. This

example is with all 120V loads evenly distributed between L1-N and L2-N, or with 208/240V loads.

UPS 1

UPS 2

Total Output

UPS 1

UPS 2

UPS 3

Total Output

L1-N

L2-N

L1-N

L2-N

Load

L1-N

L2-N

L1-N

L2-N

L1-N

L2-N

Load

2

4

2

4

12

1.33

2.67

1.33

2.67

1.33

2.67

12

Total load supported by the parallel POD for each of these configurations is 12kVA. If two UPSs are connected to

the parallel POD, each provides 6kVA. If three UPSs are connected to the parallel POD, each provides 4kVA. This

example is with more 120V loads connected on L2-N output.

Note that the L1-N, L2-N and L1-L2 loads are evenly shared among all the connected UPSs. Load val- ues are in kVA.

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