Siemens P1 Uživatelský manuál stáhnout pdf (Strana 8)

P1 Panelboards • Quick reference for selection and application

Type P1 Panelboards

Selection and Application

3 Easy Steps for Selecting a Siemens Revised P1 Panelboard (Note: Factory assembled panels are configurable in COMPAS)

The Revised P1 Panelboards are now available in both Feed-

thru (FT) and Non-Feed-thru (NFT) variations. There is a

savings of 6” of box height when a NFT version is selected

which eliminates the sub-feed space. The Sub-Feed Space

is where the Feed-thru Lugs, sub-feed breaker or a Surge

Protection Device (SPD) is installed. The interior part number

will end with a “T” for FT panels and will end with an “N” for

NFT panels.

The Revised P1 Panelboards also have Extended Circuit

variations with 54 circuits and 66 circuits available.

Feed-thru (FT) panels are pre-engineered to accept the most

common modifications without increasing box height. The

enclosure size is determined by the number of circuits as shown in

the Main Lug Table P1-5 or the Main Circuit Breaker Table P1-3.

All Revised P1 FT main lug or main breaker panelboards have space

built-in to accept either feed-thru lugs equal to the panel rating

(or) one subfeed circuit breaker up to 250 amperes (or) a surge

suppressor (SPD) without increasing box height. (When ordered

with sub-feed space the interior part # will end with a “T”).

Non-Feed-thru (NFT) panels do not have a sub-feed space and cannot

accept feed-thru lugs (or) sub-feed Breakers (or) SPD/TVSS devices.

(NFT panel interior part # will end in “N”).

Note the following features, all found in the innovative P1

lighting panelboards:

• Symmetrical 250A FT Interiors – To change from top to bottom-

feed (or vice-versa), simply invert the interior. The deadfront

labeling is always legible, even on the NFT panels when inverted.

- 400A are not symmetrical, but they are invertable.

• First in the Industry Ratings of 125 through 400A main lug and

main breaker. Field convertible from main lug to main breaker

and vice versa – with no increase in enclosure height.

• Field adaptability of feed-thru lugs (or) sub-feed circuit breaker

without increasing enclosure size. (FT panels only)

• Neutral system is field upgradeable to 200% capacity – another

industry first. (also 2/0 neutrals are available as a field install kit)

• Extended circuit panels are now available – up to 66 circuits.

- 18, 30, 42, 54 and 66 circuits for 250A (FT & NFT)

- 26”, 32”, 38”, 44”, 50” and 56” standard Enclosures are used.

Step 1

Determine voltage, system, amperage and

interrupting rating of branch devices, plus

modifications if any.

Example for standard lighting panelboard:

Amperage: 250A

Voltage: 208Y/120V

System: 3Ø4W

Main: Main Lug

Branches: 10K AIR, 42-20/1

Modifications: None

Feed Location: Top

Sub-Feed req’d: Yes (as provision if wanted)

Mounting: Surface

Step 2

Create a catalog number by following the

Panelboard Catalog Numbering System on

- 30, 42 and 54 circuits for 400A (FT & NFT), also 66 circuit NFT

- 56”, 62”, 68” and 74” standard Enclosures are used.

• Suitable for use as service entrance given compliance with NEC.

• Bonding provisions are shipped with each panel.

• 240V and 480Y / 277V versions utilize identical boxes & fronts

Enclosure – Standard Type 1 enclosure is 20” wide x 5.75” deep.

Box Height is determined only by the number of circuits and FT or

NFT selection, not by main lug or main circuit breaker. See charts

P1-3 and P1-5 for box height.

Voltage – 480Y/277 Vac max. (Limited options for 600Y / 347V

Amperage – 400 amp max.

Short Circuit Rating – 200 KAIC max. symmetrical or equal to the

lowest rated device installed unless a series rating is indicated.

Panels with subfeed or feed-thru lugs without a main device,

circuit breaker or fusible unit, are limited to a three-cycle rating.

The three-cycle rating for the P1 panel is limited to 22 KAIC. Note

that the main device may be mounted remote from the panel.

Bussing – The P1 panel meets the majority of the markets

bussing requirements. The standard bussing is temperature rated

aluminum. The rating is per the requirements of UL 67– the

standard for panelboards. All aluminum bussing is tin-plated.

Optional bussing for the P1 panel is temperature rated copper.

The copper bus option for this panel is tin-plated.

Weight – Approximate

Total panelboard weight when filled with a normal quantity of

breakers and accessories is about 3 lbs. (1.36 kg) per inch (54g per

mm) of box height.

Table P1-1 – Box Material Gauge

Width Height (inches) Gauge Steel

20” (250A) 26, 32, 38, 44, 50, 56 #16 (#17 for endwalls)

(400A) 56, 62, 68, 74 #16 (#17 for endwalls)

Table P1-2 – Trim Material Gauge

20” (250A) 26, 32, 38, 44, 50, 56 #14

(400A) 56, 62, 68, 74 #14

page 4. The BL branch breakers were

selected from the branch breaker selection

table 1-6 on page 6.

1-P1C42ML250ATST (“T” indicates FT version)

42-20/1 BL

Note: If Sub-feed space is not needed

the NFT device can be used as below:

1-P1C42ML250ATSN (“N” indicates NFT

version) 42-20/1 BL

Step 3

Select enclosure size by the number

of circuits and FT/NFT as shown in the

panelboard dimension chart (Table P1-3)

on page 5.

1-P1C42ML250ATST

42-20 BL

Box size – 44” high

A unique feature of P1 FT panels is that

they can accommodate either feed-thru

lugs or one subfeed circuit breaker (up to

250A) without any addition to box height.

For our example changing the branch

circuits to 39-20/1 and 1-125/3, we have

the following:

1-P1C42ML250ATST

39-20/1 BL

1-125/3 QJ2

Box size – 44” high

The QJ2 subfeed was selected from Table

P1-7 of subfeed breakers on page 7.

The box height remains the same.

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