CircCircuit Protection in Health Care Facilitiesuit Protection in Health Care Facilities

8/16/2019 CircCircuit Protection in Health Care Facilitiesuit Protection in Health Care Facilities

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Critical Power: Circuit Protection

in Health Care Facilities

Sponsored by:


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Today’s Webcast Sponsors:


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Neal Boothe, PE,

exp US Services Inc.,

aitland, !la.

"a#es !erris, PE,

T$% En&ineerin& 'or (rchitect)re,

*rlando, !la.

oderator: (#ara +o&)s,Editor in %hie',

Consulting-Specifying Engineer and

Pure Power

Presenters:


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-. The a)dience ill )nderstand the applicable codes: N!P( /0:

National Electrical %ode, (rticle 1-/, N!P( 22: 3ealth %are

!acilities %ode, and N!P( --0: Standard 'or E#er&ency and

Standby Poer Syste#s.

4. (ttendees ill )nderstand the coordination, overc)rrent, short5

circ)it, and &ro)nd5'a)lt protection iss)es 'or health care 'acilities.

6. 7ieers ill learn abo)t 'eeder protection desi&n re8)ire#ents 'orhealth care 'acilities.

9. 7ieers ill learn abo)t branch protection desi&n re8)ire#ents 'or

health care 'acilities.

$earnin& *bectives


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(pplicable %odes

; National Electrical %ode Edition here

; N!P( 22, 3ealth %are !acilities %ode; Used the 40-4 Edition here

; N!P( --0, Standard 'or E#er&ency and

Standby Poer Syste#s; Used the 40-6 Edition here


7/43

?)ic@ Tho)&hts on These %odes

; National Electrical %ode

A By 'ar #ost speci'ic re8)ire#ents

A !oc)ses on Electrical Sa'ety

A %hapters - A 9 Still (pply to 3ospitals

A (rticle 1-/ A 3ealth %are !acilities adds ne

re8)ire#ents

A (rticle /00 A E#er&ency Syste#s A Stillapplies to 3ealth %are


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; N!P( 22, 3ealth %are !acilities %ode

A %overs #any #ore topics than electrical

A %hapter A Electrical Syste#s

; .6.4.- A N!P( 22 de'ines per'or#ance re8)ired to

ens)re sa'ety. NE% de'ines ays syste#s #)st be

installed to achieve desired per'or#ance.

; There is a &reat deal o' re'erencin& beteen N!P(

22 and NE% (rticle 1-/

A %hapter -0 A Electrical E8)ip#ent

; (pplies #ore to #an)'act)rers than desi&ners


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; N!P( --0, Standard 'or E#er&ency and

Standby Poer Syste#s

A %oncerned ith Cenerator, (TS, etc.

A Not ritten aro)nd )st health care

A 3ospitals D $evel - Syste# . . . B)t so are

other b)ildin& types


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!eeder Branch %irc)it Protection

; NE% 1-/.-4 A Except as #odi'ied in this

article, irin& #ethods shall co#ply ith

the applicable re8)ire#ents 'or %hapters

- thro)&h %hapter 9 o' this Code.

; So, yo) can’t )st loo@ at (rticle 1-/

A It adds ne re8)ire#ents


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!eeder Branch %irc)it Protection

; !eeders A Not too #)ch di''erent 'or

hospitals

A Panels servin& critical care areas

; Branch circ)its A 7ery speci'ic

re8)ire#ents 'or hospitals

A Patient care vers)s Non5Patient care

A E#er&ency vers)s *thers


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What is a Patient %are (reaF

; Per NE% 1-/.-> 1-/.-2, to types:

-. Ceneral %are A Patients in contact ith ordinary

appliances; edicalGs)r&ical roo#s, exa# roo#s, etc.

4. %ritical %are A Patients s)bect to invasive proced)res

; I%U, *+s, %atheteriation $abs, $aborGHelivery, %oronary

%are, Tra)#a, E#er&ency %are, etc.

; Note: (reas s)ch as n)rse stations, #edical

prep, no)rish#ent, clean, soil, etc. aren’t Patient

%are (reas


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3ospital !eeder %irc)it Protection

; !or Panels Servin& %ritical %are (reas

A Per NE% 1-/.-2, i' #etal cond)it, I, or %

cable is )sed

; Cro)nd Panel to !eeder via: A Cro)ndin& b)shin&

A Threaded h)bs

A *ther approved devices

; (ny other areas


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3ospital Branch %irc)it Protection

; To ain Tho)&hts . . .

A +ed)ndant &ro)ndin& re8)ired 'or all patient

care area branch circ)its A NE% 1-/.-6


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Patient %are (rea


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Patient %are (rea


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Exceptions to echanical Protection

; Non5Patient %are (reas

A Sched)le >0 P7%

A In %oncrete

; Sched)le 90 P7%

; !lex non5#etallic or ac@eted #etallic raceay

; "ac@eted #etallic cable


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Exceptions to echanical Protection

; Patient %are (reas

A !lexible #etal #etal sheathed cable in:

; In listed #edical headalls

; In listed o''ice ')rnit)re

; !ished into existin& alls or ceilin&s

; Necessary 'or 'lexible connection


19/43

3ospital Crade !lexible %able

; ( JcrossK beteen (% and % %able

A 3as a &ro)ndin& cond)ctor


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In a Non5Patient %are (rea

; E#er&ency %irc)its

-. +ed)ndant &ro)ndin& not re8)ired

4. Still re8)ire #echanical protection

6. (llos #ore 'lexibility o' installation A b)t 4still leads to #etal cond)it o'ten

; Nor#al %irc)its

-. +ed)ndant &ro)ndin& not re8)ired4. echanical protection not re8)ired

6. This allos #)ch #ore 'lexibility o' installation


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22/43

Short %irc)it Protection

; Inp)t Hata

; %alc)lations

; E8)ip#ent +atin&s; Na#eplates


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Short %irc)it Inp)t Hata

; Utility !a)lt %ontrib)tion

; Cenerator !a)lt %ontrib)tion

; otor %ontrib)tion

; !eeder Sie $en&ths

; Trans'or#er Sie I#pedance

; LI' (lloed by ()thority 3avin& ")risdiction A

%)rrent $i#itin& devices+es)lts: Short %irc)it !a)lt (vailable at locations

thro)&ho)t the distrib)tion


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!a)lt %alc)lations on Cenerator or Utility

; )st %onsider both so)rces as potential

so)rce o' 'a)lt c)rrent.

; Utility co#pany ill provide a letter

indicatin& the available 'a)lt at the service

; Cenerator #an)'act)rerMs can provide the

'a)lt o)tp)t o' each en&ine

; So#eti#es both o' these are in parallel


25/43

Short %irc)it %alc)lation +es)lts Exa#ple

BUS V3-Phase Faulton Utility A!

3-Phase Fault on"enerators A!

#ar$estAvailable Fault

(3U 45- 9>0 210.6 2/19.4 2/19

(TS %+- 9>0 99292.4 99929.1 99292

(TS E?4 9>0 6221.6 9699>.1 96992%34*+HPB 9>0 6421.- 66>29.> 66>21

%$4( 40> 112>.4 1121.2 112>

$S3- 9>0 4-4-.1 4--0.6 4-44

N36 9>0 40146.2 4-00.9 4-00

L (lso need to calc)late the Sin&le $ine to Cro)nd as on Cenerator poer that

is o'ten the orse case.


26/43

Short %irc)it +atin&s A in the !ield

; (I%: A#ps %nterr)ption C)rrent

A Brea@ers !)ses have this

; WS+: &ithStand +atin& A

A Enclos)res G E8)ip#ent s)ch as an

()to#atic Trans'er Sitch

; S%%+: Short Circ)it C)rrent 'atin&

A U$ 10>( G NE% 902.--0 re8)ires Ind)strial

%ontrol Panels to be labeled ith S%%+


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Short %irc)it +atin&s A in the !ield

; +evie E8)ip#ent

Na#eplates in the 'ield

to ens)re they #eet the

re8)ire#ents o' the

Short %irc)it%alc)lations

Air Handlin$ Unit (a)eplate


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Short %irc)it +atin&s A What needs oneF

Sitchboards ()to#atic

Trans'erSitches

Panelboards

otor%ontrollers

ElectricalHisconnects

Elevator%ontrollers

P)#pStarters

Ind)strial%ontrolPanels

(d)stableSpeed Hrives


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Selective %oordination

; NE% He'inition o' Selective %oordination


30/43

Selective %oordination Coal

-. Protect other circ)its by ens)rin& the

brea@er in tro)ble trips 'irst

4. Protectin& e8)ip#ent and in'rastr)ct)re

a. Trans'or#ers

b. %ables

c. otors

d. Cenerators


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Selective %oordination Exa#ple

( 0( ain %irc)it

Brea@er Panelboard

Serves several 40(

%irc)its

( 'a)lt on the 40(

circ)it brea@er

sho)ld not trip the

0( brea@er


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Selective %oordination Process

Select*vercurrent

+evice

Chec,Coordination

Adust+istribution


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Selective %oordination He#onstration

; Use Ti#e5%)rrent%)rves tode#onstrate

Selective%oordination

Current

. i ) e


34/43

Exa#pleExa#ple o' a

typical ti#e5

c)rrent plot

here all the

brea@ers 'or a

partic)lardistrib)tion are

shon in a sin&le

plot.

Selective

coordinationocc)rs here

there is space

beteen the

brea@ers.


35/43

Selective %oordination 0.-s Hebate

; NE% does not indicate a

ti#e re8)ire#ent 'or

Selective %oordination.; N!P( 22, 3ealth %are

!acilities, 40-4 Edition

indicates that in a

hospital Selective

%oordination Starts at

0.- Second


36/43

Selective %oordination 0.-s Hebate

!or 3ealth %are 'acilitiesonly, here 40-4 isapplicable

; *verc)rrent protectiondoes not have toselectively coordinate'ro# 0 to 0.-s

; Hisclai#er A disc)ssthis ith yo)r local

(3"

*verc)rrent Protection

in this area #)stselectively coordinate

*verc)rrent Protection in

this area sho)ld, b)t does

not have to coordinate


37/43

Cro)nd !a)lt Protection

; 3ospitals re8)ire to levels o'

&ro)nd 'a)lt protection

; Separation #)st be cycles

per NE%, (rticle 1-/

; Typical Cro)nd !a)lt Plot

shon at the ri&ht


38/43

(rc !lash Personnel Protection

ShortCircuit

Available

*vercurrent+evice

Settin$s

Arc Flash/ner$y

Available

Short %irc)it, Selective %oordination have a direct i#pact on ho #)ch

ener&y is available in an (rc !lash Event.


39/43

$earnin& *bective S)##ary

; (pplicable %odes

; !eeder Branch %irc)it Protection

; +ed)ndant Cro)ndin& at Patient

$ocations

; Short5%irc)it %alc)lations

; Selective %oordination; (rc !lash


40/43

S)b#ittin& ?)estions, Exit S)rvey and (rchive

?)estionF

Type yo)r 8)estion in the J(s@ a ?)estionK box on the Webcast

%onsole and clic@ JSend.K We ill &et to as #any 8)estions as e

have ti#e 'or. ?)estions that are 'or today’s presenters ill be

ansered verbally d)rin& the ?( session.

Exit S)rvey:

Please ta@e a #o#ent to anser a 'e 8)estions on o)r exit

s)rvey that ill pop )p on yo)r screen at the concl)sion o' the

ebcast. We )se the ansers to help #a@e i#prove#ents to o)rebcast pro&ra#.

(rchive:; Within / days, an archive ith ?( ill be posted

; We ill send an e#ail to re&istered attendees ith hyperlin@;

http://www.csemag.com/


41/43

Neal Boothe, PE,exp US Services Inc.,

aitland, !la.

"a#es !erris, PE,T$% En&ineerin& 'or (rchitect)re,

*rlando, !la.

oderator: (#ara +o&)s,Editor in %hie',

Consulting-Specifying Engineer and

Pure Power

Presenters:


42/43

Than@s to Today’s Webcast Sponsors:


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Sponsored by:

CircCircuit Protection in Health Care Facilitiesuit Protection in Health Care Facilities

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