DISTRIBUTION BOARD

Please read the instruction manualbefore using the device.

Safety Precautions

G-199-8-C8163-B HQ 0902 Printed in Japan (MDOC)

Revised publication effective Feb. 2009.Superseding publication of Sep. 2008.

Specifications subject to change without notice.

HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

CNF-BMODEL

Structure is achieved by the pursuit of high capacity.Accommodates units within a height of 1,800 mm, housing up to 18 units of two sets of 100 AF / 3P MCCB.

Structure assures outstanding operability, maintenance performance, and safety.Features double-door construction (inside door, outside door), and the inside door—i.e., unit front—is fitted with a protective cover that leaves only the MCCB operating handles exposed.The transparent safety cover fitted to the MCCB power supply side ensures safe execution of maintenance/inspection work even when the inside door is left open.

Structure assures ease of installation and wiring.Constructed to the same casing depth and configured with the same busbar scheme as the Type-B Motor Control Center, this model permits contiguous installation and direct connection of busbars of both panels.With its B wiring (standard), connection to external devices is easy through the front of the panel.

1

2

3

The Mitsubishi Distribution Board Model CNF-B plays a key role in supplying power to and protecting permanently-installed equipment for buildings such as power and lighting facilities.

It provides the functions needed to implement power supply, overcurrent protection, short-circuit protection, and load switching for power and lighting facilities. Requiring modest installation space, the CNF-B is installed contiguously with a control center to enable efficient central monitoring. Various safety systems are duly provided. In addition, the distribution panel is designed with full consideration for ease of maintenance, inspections, and usability (ease of monitoring). CNF-B features state-of-the-art performance for switching power and lighting circuits and for switching main and standby power supplies.

Features

Applied Standard

Insulation voltage

Rated maximum current

Rated short time current

Maximum withstand voltage

IEC, NEMA, JIS, JEM

690V AC

3500A AC

Standard: 50 kA, 1 sec Maximum: 75 kA, 1 sec

2500V AC

<Ratings>

Unit

Inside door

Circuit nameplate

Transparent window

Outside door

Lighting facilities

Pumps

Valves

Motors

Fans

Power supply

Controlpower supply

Power supply

Transformer

CNF-B Distribution Panel

Protective cover

MCCB operating handle

Power facilities, such as a control center

1 2

Structure

External Dimensions

Type: CNF-BC-652B (load cable bottom entry)

Type: CNF-BC-652T (load cable top entry)

3 4

Wiring method

550 Insulation barrier

50050

56816 16

160

160

50

5712

610

217

1 2-M12

4-M5

200

5019

00 /

1500

200

50

DC

AB

51542.51656816

4-M5

2-M12

5717

1

50 500 50

160

160

456

47

42.5

150

150

47

50 505006-M5

200

1900

/ 15

00

Uni

t spa

ce

50

CD

AB

5020

0

550 Horizontal busbars

HB; 600 A ~ 1200 A…A=300B=900 / 600C=900 / 600D=200 / 400

HB; 1600 A, 2000 A…A=400B=800 / 600C=800 / 600D=300 / 300

HB; 3φ4W ……………A=500B=800 / 600C=800 / 600D=200 / 200

Note: The oblique lines indicate a space for incoming cables.

2300

/190

050

Transparent window

Side

550600 1. 61. 6

2524

614

564

750

490 100100 200 490

690 x number of panels

Four φ18 installation holes per panel

947690 x number of panels + 100

Wiring on the front side of the panel directly to MCCB

Wiring on the rear side of the panel to terminal blocks

B wiring C wiring (optional)

Side viewTop view

Top view Bottom view

Side view

Outdoor typeIndoor type

Front (1 panel)

SideFront (two panels)

Bottom

Front view Rear view

Unit: mm Unit: mm

Unit: mm

Unit: mm

MCCB

MCCB

MCCB

MCCB

MCCB

MCCB

MCCB

MCCB

Terminalblocks

Terminalblocks

91

Front Front

Front

Note: The oblique lines indicate a space for incoming cables.

Front

Front

Uni

t spa

ce

Basic type

2300

/190

050

Transparent window

Side

400600 1. 61. 6

Front (1 panel)

Thin type

70Ventilator

Type Designation

CNF−BC− 6 5 2 B - BModel type Panel width 600 mm

Panel depth 5: 550 mm 4: 400 mm

Panel height 2: 2300 mm 1: 1900 mm

Load cable entry B: From bottom T: From top

Wiring method B: B wiring C: C wiring

HB; 600 A ~ 1200 A…A=300B=900 / 600C=900 / 600D=200 / 400

HB; 1600 A, 2000 A…A=400B=800 / 600C=800 / 600D=300 / 300

HB; 3φ4W ……………A=500B=800 / 600C=800 / 600D=200 / 200

Structure

Busbar

5 6

Unit

The horizontal busbars are configured vertically in an upper section on the rear side, so that load cables can be led in from either top or bottom.The upper section space on the front side can be used as wireways when configuring wiring between panels: for example, for shared circuits for a control line or an interlocking circuit.Size of the neutral phase of the 3-phase, 4-line horizontal busbar is 1/2 the size of the other phases as standard.

Vertical busbar (copper, tin plated)

Horizontal busbar (copper, tin plated)

Maintenance works can be carried out from the front side such as connectin of horizontal busbars or tightening of connection bolts.

Both front and rear side of vertical busbars are covered with steel plates.

600 A800 A

1000 A1200 A

1600 A2000 A

2500 A3000 A3500 A

Rated busbar currentBusbar compartment space

Three-phase, three-line Three-phase, four-line

300 mm500 mm

400 mm

400 mm (Front / Rear) 500 mm (Front / Rear)

700 A 900 A (optional)

Horizontal busbars (rear view) Horizontal busbars (left view)

Wireway

Unit space

Horizontal busbars

Protective cover

Safety cover

Installation frame

Transparent window Outside doorInside door Protective

coverSafety cover

Installation frame

Transparent window

Outside door Inside door

Plug-inUnit base

Unit designation: BC4-12SW12SW(125 AF)

Unit designation: BC5-25SW(250 AF)

Safety coverSafety cover MCCBMCCBMCCB

MCCBMCCBMCCB

Rated busbar current …

Plug-inUnit base

Table of units

Table 1 Standard feeder unit (3φ3w, 1φ2w)

7 8

Table 2 Standard incoming unit (3φ3w, 1φ2w)

BC3-03✽✽03✽✽-2

BC3-03✽✽-2

BC3-06✽✽06✽✽-2

BC3-06✽✽-2

BC4-03✽✽03✽✽

BC4-03✽✽

BC4-06✽✽06✽✽

BC4-06✽✽

BC4-12✽✽12✽✽-2

BC4-12✽✽-2

BC4-12✽✽12✽✽

BC4-12✽✽

BC5-25✽✽

BC12-40✽✽

NF32-✽✽

NF32-✽✽

NF63-✽✽

NF63-✽✽

NF32-✽✽

NF32-✽✽

NF63-✽✽

NF63-✽✽

NF125-✽✽

NF125-✽✽

NF125-✽✽

NF125-✽✽

NF250-✽✽

NF400-✽✽

2

2

2

2

3

3

3

3

2

2

3

3

3

3

30

30

50

50

30

30

50

50

100

100

100

100

225

400

2

1

2

1

2

1

2

1

2

1

2

1

1

1

14-5

14-5

14-5

14-5

14-5

14-5

14-5

14-5

60-8

60-8

60-8

60-8

100-8

325-12

Unit height(mm)

75

100

125

300

Unit designationMCCB

Type PolesAmpere frame (AF) QuantityMaximum cable size for incoming

B wiring (mm2) - (screw size)

BC4-06✽✽-P

BC5-12✽✽-P

BC8-25✽✽-P

BC22-40✽✽-P

BC22-63✽✽-P

BC30-80✽✽-P

NF63-✽✽

NF125-✽✽

NF250-✽✽

NF400-✽✽

NF630-✽✽

NF800-✽✽

3

3

3

3

3

3

1

1

1

1

1

1

14-5

60-8

100-8

2X325-12

2X325-12

2X325-12

1-CT

1-CT

2-CT

2-CT

2-CT

2-CT

200

550

750

125

100

AccessoryMCCB

Type Poles Quantity

Maximum cable size for incomingB wiring (mm2)-(screw size)

Note: (1) Up to six units of the 225 AF can be installed on one panel and up to two units of the 400 AF on one panel. (The maximum capacity of a vertical busbar is 900 A.)

Note: (1) For the units 400 AF and above, the MCCB is installed vertically at the lowest position, and a power cable is led in from the MCCB secondary side. (MCCB is installed at the highest position if the power cable is led in from the top.)

(2) Units 600 AF and above require conductor connections.(3) A terminal block is installed outside of the unit. (C wiring)

Table 3 Feeder unit with earth-leakage relay (3φ3w, 1φ3w)

Description of unit designation (example)

BC4-06✽✽-Z

BC5-12✽✽-Z

BC8-25✽✽-Z

BC16-40✽✽-Z

NF63-✽✽

NF125-✽✽

NF250-✽✽

NF400-✽✽

3

3

3

3

1

1

1

1

14-5

60-8

100-8

325-12

NV-ZBA, ZT15B

NV-ZBA, ZT30B

NV-ZBA, ZT40B

NV-ZBA, ZT100B

100

125

200

400

AccessoryMCCB

Type Poles Quantity

Maximum cable size for incomingB wiring (mm2)-(screw size)

Symbol Unit height

BC3

BC4

BC5

•

•

BCn

75

100

125

•

•

25Xn

Symbol

06SW

12SW

25SW

•

•

•

MCCB type

NF63-SW

NF125-SW

NF250-SW

•

•

•

Symbol

None

2

P

Z

Category

2 pole MCCB

Incoming unit

With an earth-leakage relay

12SW PBC5

†(1) †(1) (2)

50

100

225

400

Ampere frame (AF)

50

100

225

400

600

800

Ampere frame (AF)

Unit height(mm) Unit designation

†(3)

Unit height(mm) Unit designation

Feeder unit(3 pole or 4 pole MCCB)

Planning Information Installation

Unit Accommodation Space

Unit Accommodation Samples

9 10

Foundation base and installation example (indoor type)

Doorfastener

Doorfastener

Terminal compartment

Terminal compartment

(Example)

200

1800

200

50U

nit a

ccom

mod

atio

n sp

ace

50 500

1500

200

50U

nit a

ccom

mod

atio

n sp

ace

50

Transparentwindow

Instrumentation compartment

Incoming main circuit power supply

Contactors for lighting

Terminals

0

5

10

15

20

0

5

10

15

20

0

5

10

15

20

SP: Space for future additional unitsDSP: Space not permitting unit accommodation

AL ARBL BR

CL CR

DL DR

EL ERFL FRGL GRHL

JL

HR

KLJR

LL

KR

MLLR

N

MR

PO

R

T

S

SP

SPSP

SPSPSP

AL AR

BL BR

CL CRDL DREL ER

FL FRGL GR

HL

JL

HR

KLJR

LLKR

MLLR

N

MRDSP

A

B

C

D

E

F

G

H

J

K

L

M

N

P SPDSP

SP

SP

SP

Foundationbolt

2300

·190

050A

BB

A M12

50

250

(Notes)1. One unit of the foundation base is for maximum 3 panels;

installation of 4 or more panels requires a combination of units.

2. Maximum 3 panels can be combined on one commonfoundation base as a transportation unit.

3. Necessary number of foundation bolts (figure on right) can be supplied as an option.

(1 panel)

(2 panels)

(3 panels)

1200Front space

50Rear space

Frame

DoorFoundation hole in bottom frame (14 x 25 long hole)

Foundation bolt (M12, not included)

Cotter rod (not included)

Buried base (not included)

15 2

5029

383

35131 18400

Bottom frame

Foundation base50×50×3.2

Rear panel

6 x φ22-mm hole (top to bottom)

500

300

351

3118

40050 50500 500100 100

100

60050 50600500

1800

500

300

351

3118

40050 50500

110050 50

1200

4 x φ22-mm hole(top to bottom)

4 x φ22-mm hole (top to bottom)

500

300

351

3118

40050 50

50050 50

600

(1 panel)

(2 panels)

(3 panels)

50

50

450

550

100 100500 500 500

500

100500 500

488

488

550

450

488

550

450

50

50 600 600

1800

50

50

1100

1200

50

50

50

50

50

50

500

4 x φ22-mm hole (top to bottom)

500

600

4 x φ22-mm hole (top to bottom)

6 x φ22-mm hole (top to bottom)

15

550

520

488

29

Bottom frame

Door

Foundation base50×50×3.2

15

50

Frame

Buried base (not included)

Cotter rod (not included)

Foundation bolt (M12, not included)

Foundation hole in bottom frame (14 x 25 long hole)

1200Front space

800Rear space

Thin typeBasic type

Front bottom

Cross-sectional view (A-A) Cross-sectional view (A-A)

Cross-sectional view (B-B) Cross-sectional view (B-B)

Configuration example 1 Configuration example 2(with instruments on top)

You can use the rear of the panel as a space for the incoming main circuit power supply or as a space to accommodate devices such as contactors for lighting.(The rear of the panel is used to accommodate terminals for C wiring.)A unit can be accommodated at the rear of the panel. Please contact us in advance if you need such a configuration change.(The total rated current of the units must not exceed 700 A/900 A, the capacity of the vertical busbar.)

(3) BC5-12✽✽ × 10 units(2) with incoming MCCB(BC25-63✽✽-P)

(1) BC4-12✽✽12✽✽ × 12 units

Unit: mm Unit: mm

Unit: mmUnit: mm

Front Front

Fron

t

Fron

t

Uni

t spa

ce

Uni

t spa

ce

Side Sidewhen the rear of the panel is used

as a space to accommodate devices such as contactors for lighting

when the rear of the panel is used as a space for the incoming

main circuit power supply

Incoming MCCB