SE Digest 178

Low-Voltage Dry-Type Distribution Transformers

Mini Power-Zone Unit Substation

www.se.com/us

Class 7400 / Refer to Catalog 7440CT0901

Sealed, Mini Power-Zone™ Unit Substation The Square D™ brand Mini Power-Zone ™ unit substation from Schneider Electric provides the answer to requirements for a compact unit substation at low amperage ratings.. This complete package yields considerable savings on floor space, installation, and overall cost. NOTE: Mini Power-Zone unit substations are UL 1062 Listed File E92978 design in a Type 3R enclosure allowing for indoor or outdoor applications. Designed for wall mounting, the unit substation leverages Schneider Electric components integrated into one device.. • Epoxy resin encapsulated low voltage transformer • H-frame main circuit breaker • Secondary main circuit breaker • Square D panel board or load center allowing for QO™ or QOB™ branch circuit breakers New MPU solution leverages the latest load center interiors, giving customers more flexibility for branch circuit requirements. Additionally design with a tiered dead front construction. The first dead front allows access to the secondary main circuit breaker, distribution panel board, and the second dead front. The second dead front allows access to the primary main circuit breaker and incoming voltage connection points.

Table 14.11: Distribution System Square D Load Centers (allowing plug-on QO circuit breakers only)

Primary Main Circuit Breaker Rating (A)

Secondary Main Circuit Breaker Rating (A)

Full Capacity Taps [16]

Spaces for Branch Circuit Breakers

Catalog No.

Weight (lbs)

Enclosure

kVA

Single Phase Unit Substation Input: 480 Vac, 18 kAIC; Output: 120 / 240 Vac 3 MPU3S40F 2–5%FCBN

MPU-A MPU-A MPU-A MPU-A MPU-B MPU-B MPU-C MPU-C MPU-C

85

15 15 20 30 60

15 30 40 60 80

10 10 10 10 22 22 27 27 27

5

MPU5S40F MPU7S40F MPU10S40F MPU15S40F MPU25S40F

2–5%FCBN 2–5%FCBN 2–5%FCBN 2–5%FCBN 2–5%FCBN

135 145 220 350 425 510 670 695

7.5 10 15 25

100

125

Three-Phase Unit Substation Input: 480 Vac 18 kAIC; Output: 208Y / 120 Vac 15 MPU15T2F 2–5%FCBN

40 60 90

60 80

22.5

MPU22T2F MPU30T2F

2–5%FCBN 2–5%FCBN

30

100

Table 14.12: Bolt-On Circuit Breakers

Catalog No.

Primary Main Circuit Breaker Rating (A)

Secondary Main Circuit Breaker Rating (A)

Spaces for Branch Circuit Breakers

Full Capacity Taps [16]

Weight (lbs)

Enclosure

kVA

18kAIC

25kAIC

65kAIC

Single-Phase Unit Substation Input: 480 Vac, 18 kAIC; Output: 120 / 240 Vac 3 MPZB3S40F MPZB3S40FSS MPZB3S40F25K

MPZB3S40F65K 2–5% FCBN MPZ-AA MPZB5S40F65K 2–5% FCBN MPZ-AA 135 MPZB7S40F65K 2–5% FCBN MPZ-AA 145 85

15 15 20

15 30 40 60 80

16 16 16 16 28 28 27 27 27

5

MPZB5S40F MPZB7S40F

MPZB5S40FSS MPZB7S40FSS

MPZB5S40F25K MPZB7S40F25K

7.5

10 MPZB10S40F MPZB10S40FSS MPZB10S40F25K MPZB10S40F65K 2–5% FCBN MPZ-AA 220 30 15 MPZB15S40F MPZB15S40FSS MPZB15S40F25K MPZB15S40F65K 2–5% FCBN MPZ -BB 350 60 25 MPZB25S40F MPZB25S40FSS MPZB25S40F25K MPZB25S40F65K 2–5% FCBN MPZ-BB 425 100

125

Three-Phase Unit Substation Input: 480 Vac, 18 kAIC; Output 208Y / 120 Vac 15 MPZB15T2F MPZB15T2FSS MPZB15T2F25K

MPZB15T2F65K 2–5% FCBN MPZ-CC 510 MPZB22T2F65K 2–5% FCBN MPZ-CC 670 MPZB30T2F65K 2–5% FCBN MPZ-CC 695

40 60 90

60 80

22.5

MPZB22T2F MPZB30T2F

MPZB22T2FSS MPZB30T2FSS

MPZB22T2F25K MPZB30T2F25K

30

100

Table 14.13: Enclosure Dimensions and Accessories Enclosure Number/Style Height

Depth

Width

Mounting

in.

mm 836 1097 1148 1298 1148 1234

in.

mm 356 533 696 544 696 696

in.

mm 300 343 343 343 343 343

MPU MPU MPU MPZ MPZ MPZ

A B C

32.9 43.2 45.2 51.1 45.2 48.6

14.0 21.0 27.4 21.4 27.4 27.4

11.8 13.5 13.5 13.5 13.5 13.5

Wall Wall Wall Wall Wall

BB

14 TRANSFORMERS

C

CC

Wall NOTE: Dimensions should not be used for construction. Contact you local Schneider Electric representative for certified prints. FCBN = Full Capacity Below Normal

[16] FCBN = Full Capacity Below Normal.

14-10

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