Industrial machinerydisconnect means

DO YOUR PANELS

STILL COMPLY WITH THE

NORTH AMERICAN

STANDARDS ?

NFPA 79

DO YOUR PANELS

STILL COMPLY

NFPA 79NEW in UL 508A

doc_107013.indd 1 14/04/09 11:26:44

2

The changes in UL508A, effective March 1, 2007 and NFPA 79 impact the design and construction of your equipment.

Important modifications concern major safety issues, the disconnect means and the interlocking of the enclosure door. Here are SOCOMEC solutions to complain with the relevant standars.

2. The disconnect means is not closable with the enclosure door open, unless an interlock is operated by a deliberate action...

Socomec solution

1. Push

Door open: From Off to ON

From Off to On it is necessary to push the handle this deliberate action permit to turn and switch On. this deliberate action is necessary as in most of the case there is no padlock on the switch when somebody open the door of an enclosure..

2. Turn

From On to Off

From Off to ON it is necessary to push the handle, this deliberate action permit to turn and switch ON.That is a major safety issue; switching ON directly with out any other action is extremely dangerous.The use of a padlock does not comply with the request of the standard, when the door of a panel is opened there is generally no padlock and anybody can turn the switch ON.

FUS

ER

456

A -

FU

SE

R 4

55 A

The changes in

NFPA 79

NEW in

UL 508A

1. The disconnect shall be operable independent of the position of the door...

An operating mechanism for the disconnecting means shall be operable independent of the door position without the use of accessory tools or devices;

UL508A; Paragraph 66.6.3 c.

The disconnect must «Be operable, by qualified persons, independent of the door position without the use of accessory tools or devices.

NFPA 79; Paragraph 5.3.3.1 (5) T

Socomec solutionA red handle is fitted on the front shaft, it allows the operation when the door is open. The standard external handle allows the operation when the door is closed.The internal handle is part of the NFPA 79 kit.These optional accessories are available for non fusible disconnect from 30A to 400A and fusible disconnect from 30A to 600A. C

OFF

333

A -

FU

SE

R 4

55 A

Door close: Operat ion with the external handle throu-gh the door

Door open: A strong optional kit with a handle directly fitted on the shaft of the switch allows the operation when the door is open

The disconnecting means is not closable with the enclosure door open, unless an interlock is operated by deliberate action.

UL508A, Paragraph 66.1.5

The interlocking means shall fulfill the following requirement.(3) Prevent closing of the disconnecting means while the enclosure door is open, unless an interlock is operated by deliberate action.

NFPA 79; Paragraph 6.2.3.1.2

These requirements cover industrial control panels for industrial machinery. The following types of machines are identified as industrial machinery:

UL508A

Standard for industrial control panels

• Metalworking machine tools• Plastics machinery• Wood machinery• Assembly machines;• Material handling machines• Inspection and testing machines

Industrial Machinery - Section 65 and 66

Disconnect and Disconnecting means = Load Break Switches - Fusible Disconnect switches = Fuse Combination Switches

doc_107013.indd 2 14/04/09 11:26:51

3

3. The disconnect means shall be able to be locked in the open position independent of the door position...

Socomec solution

Door close: The external through the door handle is padlocked* when locked closing of the disconnector is not possible

Door open: Door open a strong metallic padlock kit allow up to 3 padlock. The padlocking means is easily accessible, when locked closing of the disconnector is not possible

FUS

ER

447

B -

FU

SE

R 4

53 A

An operating mechanism for the disconnecting means shall be able to be locked in the off position independent of the door position; and when locked, closing of the disconnect is not possible.

UL508A Paragraph 66.6.3 d.

The circuit disconnecting device shall be provided with a permanent means permitting it to be locked in the off position only independent of the door position. When locked, remote as well as local closing shall be prevented.

NFPA 79 Paragraph 5.3.3.1(3)

4. The interlocking of the enclosure door shall be provided with means to defeat the interlock without removing the power...The interlocking means required by 66.1.5 shall be provided

with all the following:a) Means to defeat the interlock without removing power and which requires the use of a tool to operate;(c) Reactivated automatically when all the doors are closed.Added 66.1.5.1 effective March 1, 2007

UL508A; Paragraph 66.1.5.1

NFPA 79; Paragraph 6.2.3.1.2 states that «The (enclosure) interlocking means shall meet the following requirements :(1) Utilize a device or tool... to allow qualified persons to defeat

the interlock(2) Be reactivated automatically when the door is closed

NFPA 79; Paragraph 6.2.3.1.2

UL508 or UL98UL98; Enclosed and dead front Switches (equivalent to CSA-C22.2 no 4)

These products are used as disconnecting means without restrictions; they are heavy duty products requiring 2 inches minimum of creepage distance, which gives a maximum safety for users and installation. The short circuit withstand of those products goes up to 200 kA !

UL508; Industrial Control Equipment (equivalent to CSA-C22.2 no 14)

A manual motor controller marked «Suitable as motor discon-nect « can only be used for the local disconnection of a motor

Dis

conn

ect S

witc

h

UL

98 /

UL

489

Fuse

s

Cont

acto

r

Ove

rload

rela

y

UL

508

Man

ual M

otor

Con

trol

ler

“Sui

tabl

e as

Mot

or D

isco

nnec

t”

Mot

or

UL9

8 N

on F

usib

le

Dis

conn

ect

Switc

hes

SIRC

O &

SIR

CO

M3

Fusi

ble

Dis

conn

ect

Switc

hes

FUSE

RBLO

C

Con

tact

or

Ove

rload

rela

y

UL5

08

UL

508

Man

ual

Mot

or C

ontro

ller

«sui

tabl

e as

Mot

or

Dis

conn

ect»

SI

RCO

M1

& M

2

Mot

or

Socomec solution

A tool allows to defeat the interlock without removing power. The interlocking is reactivated automatically when all the doors are closed.

CO

FF 3

33 A

- C

OFF

345

A -

CO

FF 3

32 A

doc_107013.indd 3 14/04/09 11:27:00

www.socomec.com Réf

. DO

C 1

0701

3 -

04/0

9 -

Pho

to :

Mar

tin B

ernh

art -

Réa

lisat

ion

: SO

CO

ME

C S

ervi

ce C

omm

unic

atio

n -

IXO

C

OU

V 1

63 A

VALID FOR FRANCE

HEAD OFFICE & INTERNATIONAL SALES DEPARTMENT

SOCOMECS.A. SOCOMEC capital 11 302 300 ER.C.S. Strasbourg B 548 500 1491, rue de Westhouse - B.P. 60010 F - 67235 Benfeld Cedex Tel. +33 (0)3 88 57 41 41 Fax +33 (0)3 88 74 08 00scp.vex@socomec.com

Non contractual document. © 2009, Socomec SA. All rights reserved.

Motor controller: Sirco M1 & M2 UL508 - CSA 22.2§14 Suitable as motor disconnect

SIR

CM

113

A

SIR

CM

119

A

CO

FF 3

36 A

From 16A to 80A From 3 to 8 poles External and direct operation

Disconnect switches without fuses UL98 - UL 489 & CSA 22.2§4

SIR

CM

100

A

SIR

CM

032

C

FER

RA

Z 00

8 C

From 30A to 1200A3 and 4 polesExternal and direct operationFlange operationNFPA 79 solution

Disconnect switches with fuses UL98 - UL489 & CSA 22.2§4

FUS

ER

164

A

FUS

ER

709

A

FER

RA

Z 00

4 B

From 30A to 800AFrom 2 to 4 polesExternal and direct operationFlange operationNFPA 79 solution

Manual Transfer Switches UL1008 / UL98 & CSA 22.2§4

SV

R 1

12 B

SV

R 9

9 B

From 100A to 400A UL1008From 600A to 1200A UL98 & CSA 22.2§4External and direct operation

IN USA, CANADA & MEXICOSOCOMEC Inc222 Third Street, Suite 1221 Cambridge, MA02142 - USATel. +617 245 0447Fax +617 245 0437us.scp.sales@socomec.com

IN GERMANYSOCOMEC GmbHAm Hardtwald 11 D - 76275 Ettlingen Tel. +49 (0)7243 65 29 2 0Fax +49 (0)7243 65 29 2 13 info@socomec.com

doc_107013.indd 4 14/04/09 11:27:20