ML20083R796

Interim Part 21 Rept Re Contact Failure of Square D Type Kpd Relay Used in Diesel Generator Control Panel.Relays Replaced at Plant.Review of Matter Expected to Be Completed on 950508

ML20083R796
Person / Time
Site:	Point Beach
Issue date:	04/24/1995
From:	Nuding M MKW POWER SYSTEMS, INC.
To:	Murley T Office of Nuclear Reactor Regulation
References
REF-PT21-95 10CFR21-0071, 10CFR21-71, NUDOCS 9505300156
Download: ML20083R796 (12)

Text

,

, APR' 24 '95' 16!44 t1GI POLER S(STEMS R

P.2 EMM b,k s

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April 24, 1995 I

Thomas Murley

)

Director Office of Nuclear Reactor Regulation 11555 Rockville Pike Rockville, MD 20852 References Report No. 10CFR21-0071

Subject:

Reportable defect with Square D type KPD relay Dear Mr. Murley MKW Power Systems was notified on 2/23/95 by Wisconsin Electric -

Point Beach about a contact failure of a Square D type KPD relay used in their diesel ganerator control panel.

Our review of this subject is not yet complete.

We estimate a completion date of 5/8/95.

An interim report is attached which describes the condition.

Yours very truly, MKW POWER SYSTEMS, INC.

//A&/ddp Michael Nuding General Manager - Quality Assurance MNadg Enclosure I

I I

9505300156 950424 PDR ADOCK 05000266 S

PDR I

Post Office Box 1928 e Rocky Mount, North Carolina 27802-1928 e Phone: (919) 977-2720 TWX: (510) 929-0725 e F AX: (919) 446-3830

W 24 '95 16:44 MKW POWER SYSTEMS R

P.3 EIMM M,Inc.

f j

Report No. 10CFR21-0071I April 24, 1995 TNTERTM REPORT 10CFR21 REPORTING OF DEFECTS AND NON-COMPLIANCE 1

COMPONENT:

Square D Class 8501, Type KPD relay SYSTEM:

EMD Diesel Generator control systems CONCLUSION:

To be determined l

l l

PREPARED BY:

. ed.c, -.

• DATE: [f4/1f Donald D.A aleazzi Engineering Manager APPROVED BY 4,/m/ M 4 DATE: Ahreppe

{

Michael Nuding j'

General Manager, Quality Assurance l

Post Office Box 1928 e Rocky Mount, North Carolina 27802-1928 e Phone. (919) 977-2720 l

TWX: (510) 9294725 e FAX. (919) 446-3830

APP 24 '95 16:45 MKW POWER SYSTEf1S R

P.4 REPORT NO. 10CFR21-0071I l

PAGE:

1 OF 4

SUMMARY

Recent information has revealed a change in published DC contact ratings of Square D type KPD relays These relays are used by MKW Power Systems in diesel generator 125 VDC control circuits.

MKW Power Systems received notification on 2/23/95 from Wisconsin Electric - Point Beach about a contact failure of the BTR (breaker trip relay) within the diesel generator control panel.

The contact was wired out for customer use; Wisconsin Electric utilized the relay contact to trip their 86 lockout relay.

Investigation by Wisconsin Electric revealed that their circuit required approximately 1.3 amps 0 125 VDC.

This lead Wisconsin Electric to verify the contact ratings of the BTR relay (Square D class 8501, type KPD-13).

Square D indicated that the KPD-13 i

relay did not have any DC ratings.

MKW Power Systems performed further investigation with Square D which revealed that Square D had recently corrected their catalog to remove the DC ratings.

Previous issues of the Square D Digest provided the following contact ratings (see Exhibit 2):

1985:

10A continuous, make/ break 60 VA 0 125 VDC.

1990:

10A continuous a 6-120 VDC.

1992:

no DC contact ratings.

1994:

no DC contact ratings.

According to Square D, the above changes in contact ratings were due to catalog errors; not due to design changes of the KPD-13 relay.

MKW Power Systems informed Square D that they have been utilizing the KPD-13 relays in 125 VDC circuits for more than twenty years with successful results and therefore the relays have demonstrated their capability to handle DC loads.

Square D contacted their supplier and provided the following ratings (see Exhibit 1):

10A continuous, make/ break 50 VA (.4A) a 125 VDC.

Some KPD contacts within the MKW Power Systems' control panels are wired-out to terminals for " customer's use".

These contacts are used for applications such as: D/G circuit breaker close, D/G circuit break trip, 86 relay trip, etc..

The above contact make/ break ratings are less than the original ratings of 60 VA and therefore users should be notified of this deviation.

COMPONENTS Square D class 8501, type KPD relays.

KPD-13 (3 pole version)

KPD-12 (2 pole version)

, APR 24 '95 16:46 MKW POWER SYSTEMS R

P.S l

REPORT NO. 10CFR21-0071I l

PAGE:

2 OF 4 l

CUSTOMERR AFFECTED To be determined.

1 DEFECT l

The defect has been identified as a change in the DC make/ break I

contact rating of the Square D type KPD relay.

Square D's most l

recent publications show the rolay as not having any DC contact ratings, but they have verified with their relay supplier that the relay can make/ break 0.4 amps (50 VA) and carry 10 amps continuously 8 125 VDC.

This make/ break rating is less than the originally published rating of 60 VA 6 125 VDC.

MKW Power l

Systems has been utilizing the KPD relay in their 125 VDC control circuitry for more than twenty (20) years.

During this time I

period, contact failures due to excessive current have not been a problem.

All customers (except FP&L -

Turkey Point and Wisconsin Electric - Point Beach) have at least ten (10) years of operating experience.

Because of this operating experience, MKW Power Systems does not believe that the described change in contact ratings will affect the operability of its diesel generators in nuclear safety related service.

Circuitry for FP&L and Wisconsin Electric control panels is being reviewed to determine if loads beyond the 50 VA contact rating exist.

1 CORREETTVE ANTTON Users should review their circuitry which utilize " customer use" l

KPD relay contacts and verify that the new contact ratings are not exceeded.

For Wisconsin Electric-Point Beach, relays SDRX2 and BTR have l

been identified as being utilized in circuitry which exceeds the 50 VA contact rating.

Wisconsin Electric has replaced these relays with ones having adequate contact ratings.

f

l APR 24 '95 16:47 IKW POWER SYSTEMS R

P.6 J

i REPORT NO. 10CFR21-0071I PAGE:

3 OF 4 EXHIBIT 1 (1 pages)

SQUARE D TO MKW POWER SYSTEMS KPD RELAY CONTACT RATINGS a:

APR 24 '95 16:48 MKW POWER SYSTEMS R

P.7-P.1 MAR 20 '95 09:43't1 CPB IKT RALEIGH SMTTAL FACSMLETRANSMTTAL FACSMLETRANSMTT/

SOUARE D COMPANY D

AUTOMATION AND CONTROL BUSINESS HIGHWAY 64 EAST.10eGMTDALa, NC 27945 NUMBER OF PAGES INCLUDING THIS PAGE: 1 t

IF YOU HAVE NOT RECEIVED ALL PAGES CALL: 919 2664298.

DATE: March 17,1995 I

FAX NO. 919/ 6 - 6112 TO: Michael Nuding Q_-!AR h. [...

y y,,,,,,

FAX NO. 919 / 266 - 8393 FROM: John Nussbaum Raleigh Marketing l

SUBJECT:

8501 KPD13 Relays DC Contact Ratings The 8501 KPD13 relay doesn't have any UL appmved DC contact ratings. The information published in our 1990 Digest was incorrect. The information shown in our current Digest is cornet.

Our supplier has done some in house testing and Sey say it will make and break 10 amp at 28 VDC and 0.4 amps. at 125 VDC. The contacts will continuously carry, l

but not make or break,10 amps, at 125 VDC.There is no testing available to support a 60 VA rating.

I hope this information helps you. IfI can be of any further help, please call me at (919) 266 8298.

Regards, 8,Q

• P a w aar uoR 7 0 m Popet m.,,p+a

-w rw-r r-.

w.

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FIPR 24 '95 16:49 MKW POWER SYSTEMS R

p,g.

REPORT NO. 10CFR21-0071I PAGE:

4 OF 4

[

EXHIBIT 2 (4 pages)

SQUARE D CATALOG PAGES KPD REIAY CONTACT RATINGS (1985,1990,1992, 1994)

P f

I w

,n,

-,n

.c--n

--4.-

---,--.-..,.-------n-,

,-r

-,,,-v.

l

, APR 24 '9516:50 t1KW POWER SYSTEMS R

P.9 GENERAL PURPOSE CONTROL RELAYS

< ^ -

Revised Nov 1985 8501 TYPE K Class 8501 Type K general purpose control relays are designed for multipole swuching applicatens at 240 volts o relays have an industry standard wirms and pin arrangement which allows their use as replacements for many sinul l

Y hardware modtrications-e Pilot Ught ODtion (Type KV & KP Oniy) o 240 Volt 10 Arrp.

e DPDT.or 3PDT e DPOT Latchrg Relay

• AC or DC Operation e Manual ODerator Option (Type KU Only)

TYPE KP FLANGC M0uMTED-SOUARE SASE TSRMINAflON TYPE KP - TUDE TYPE TERMINAft04 Op ws Type

@#8 M

Voltage An ngement Q.

V a0e p g

{

I DPDT None KP 12

,)

- OPOT Pet Lens Ep 12 Pte j

AC KF 12 Mr

$ POT None KP-13 Ac DPDT None SPOT Puot Laet p 13 P14 no/60 Ma spot Avaeisbw KF.g 3 KFD 12 DP0I

""'e KPO 12 DPDT None DC OPOT Piaat LagN KPO*12 P14 3PDT Avesnese Kro 33 g

3 POT None KPO* 13

'3PD1 Puot Lagnt KPD 13 Pie Type KP Type KS DD FD TYPE Ku== SOUARE SAS$ TERMINATION TYPE KL-LATCMING RELAY SouARE BASE TERMINAtlON l

input Connect U"8 DD' y

conige:

I IO' Vottage Anangement Vomage Anon 0eNil DPDT Hone KU 12 DPDT Ku 12 M1 DPDT

{$

Ku 12 P14 l

0 A

w so 60 DPDT and KU 12 MIP14 Ha LacN DC DPDT gQ KLD 12 3 POT wone Ku 13 SPDT M

KU 13 M1 4

I'"*"*'*

3PDT

[$

ku 13 P14 h

W1 RING DIAGRAMS 3PDT KU 13 MIP14 1

h OPoi mone Kuo l KUD-12 M1

-4g DPDT M

l O

DPDT KUD 12 Pie U-gg=.,

DPDT and KUD 12 M1P14 W

i 3 POT None KuC*13 SPDT KUD 13 M1 I T* I 9

SPOT KUD 15 P14 3

KUD-13 M1P14

,N-M y

g SPDT g sad M*e",*o

,* s.m APPLICATION DATA LATCH e

=

l e

pasET COIL RESISTANCE-OHMSO tvoe KP j

wp eKu.Kr tree KL Ac sosso na ac vone Ac 3,.

soeso Ma CONTACT RATINGS i

DC so so M4 3 paie 3 po,e 4

40 32 60 4.2 32 1 to S 32.1 E

/

DC 4,,,,,,,

12 24 120 24 18 120 37 120__

3,,,,,,

"W

H V0'18 e

Voire 1

t 0"

sto 10 000 10.000 10 000 enuous

& Cormnuous 3700 120 30 3

10 10 t t*\\

120 2260 2250 1700 17.900 240 16 16 10 10e l t4 l 9110 7200 a

240 9910 (44eerstance va#ues tor AC code ecove are s15 4 4 23 G and resistence veioes for DC e 3 poie oevses move swa Amps man. commuous raimg (

cons soove are :10% 44 25'C DIMENSIONS - See Page 4 7 APPUCATION DATA - See Pages 4-3,4-4 J

otDERING INFORMATION REQUIRED. - See Page 4-10 n'

4-3 b sounas D C0"*==T

APR 24 '95 16:51 MKW PCOER SYSTEMS R

P.10

• /*

I LOGICPRODUCTS GENERAL PURPOSE RELAYS TYPE K - PLUG IN CLASS 8501 k

APPUCATION DATA - TYPE K cowract navneos oc AC Wl#',NG DtAGRAMS r-

-ern o

v.c.. "=

we,e rn

~ co- ~ ~-

we 5,

EiO fb

'g _

b b

Q,

,fe 7

um

~

eso in 5

E' @

f a

.b 3

I '*

una.arcia we tah Ampe man comewoue seeme e3 pose EUs T*

4e OPERATING DATA

,, E Pick-Up Time:

y b

Types KF, KP, KU, KX - Approximately 15 me Type KL - Approximately 25 ms 1

F KP, U, KX - Approxrnately 10 ms y

KL - Approximately 25 ms LATCH mseT Operating Temperature Range:

Types KF, KP, KU. KX 2 poie: - 45*C to + 55*C -49'F to + 131*F)

ELD 1 AC: 3 pone: -45*C to + 45*C - 49*F to + 113*F)

DC: -45'C to +70*C(-49' to + 158*F) l Type KLAC./DC: - 45*C to + 70*C (- 49"F to + 158*F)

APPROXIMATE DIMENSIONS k

I E

CONTACTS Configuration: 2 or SPDT (2 or 3 Form C) 4 qqt Y

hg flf}

]

s:See table above at: Satver cadmium oxkle d

jj I

ColLS l,

sesqrw]ag Wh rated om

{u.

estvP

_g Aveliessee V ys page 1211. For a 220VDC input, use a Ig See Stocked 110VDC relay wnh a 10,000 ohm $W wire wound res:stor in e.

r b-e 1 u.

O' 4,

e

! : 4 Operese:

AC: 85% of Nominal Vortage at 25*C (77"F)

E53J J

q DC: 75% of Nominal Votage at 25'C (77*F)

IF" "#

TF "" **' "*

N km KP-AC: 3 VAinrush,2 VA sealed e!

DC: 1.2 watts standard,3 watts maxwnum CP g

Typen KU, KF:

hp f

4 AC: 2 pone - 3 VAinrush,2 VA sealed

'm7 ago 4

-i 3 pole - 3.7 VA trush,2.7 VA sealed DC:1.2 watts standard,3 watts maximum l

4 6-1

[

'[

If L

Type KX:

t AC: 3.7 VAinrush,2.7 VA seated C

0*

DC 2 watts standard.3 watts maximum p*

,,,,,,,,,,,, f AC: 2.0 VA latch. 0.6 VA untatch y

DC:1.22 watts 3

1 I. ". ' '

f 4

^

k::: 7 GENERAL

'd,,,,

U(8]_

I Terminals: Sonder/plugan h5 i

C Sockets: See listrng on page 1215.

UUCSA: Type K with recommended Class 8501 Type NR Socket:

Type KF

[

type KL

@ File E78351 File LR15734M51 CCN NLDX Class 321104 Dualownensmas @

",, eye,uto'Y['****

l 12-12

FPR 24 '95 16t52 HKW' POWER SYSTEMS R

P.11

\\ 7 / 9 2.

sieneral Purpose Relays i

Type K - Plug in Relay Application Data, Dimensions, Wiring Diagrams Class 8501 Contact Ratings Wiring Diagrams x:

oc p g g.3 m

= w

==

Q w KP' 120 to

'N &

KI. KF

1. 8

'O '

3 y

T M

sto is KU12, KUO12 KP12.KP012 6

to KX12 KXD12

{

2e ice KP12, KF012 e 3 ese ewees novo e Amps mas. comnuate mang d 'IUMExhe Kro mar]e.

KL12 o

rr e

• 4 Operating Data 4,

b P6ck4Jp Time:

O Types KF, KP, KU, KX - Approximately 15 ms hpe Apxp4 25 ms KU13, KUD13 KP13,KPD13 j

Drop Out Time:

Exis, KXD13 Types KF, KP, KU, KX - Approximately 10 ms Kris, Kro13 fp_ nm _fi Type KL-Approximately 25 ms

~

Operating Temperature Range:

KLO12 N

Types KF. KP, KU, KX 1

AC: 2 pone: 45*C to +55'C (49'F to +131*F)

Approximate Dimenolone 3 pote: 45'C to +45*C (49'F to +113*F)

DC:-45*C to +70'C (49"F to +158*F)

'[

Type KL AC/DC:45*C to +70*C (49*F to +158'F) 4 eP-I 1

I.

Contacts c

Y Conf!puration: 2 or 3PDT (2 or 3 Form C) kl

,]

4l d

Ratinge: See tabe above Materlat: Silver cadmium oxide b

Colts usese ms:r'P Duty: Continuous rated colts Available Voltages.

See Stocked Relays page 1211. For a 220VDC input, use a r

%I-110VDC relay with a 10.000 onm 5W wire-wound resistor in

?.T7 y

O AC:410.15% of Nominal Vbitage at 25*C 1

l DC: +10 25% of Nominal Voltage at 25*C j

Burden:

~

Type KP:

lype KU and Kx 1ype KP AC: 3 VA inrush. 2 VA sealed DC: 1.2 watts standard,3 watts max' num r

Types KU. KF:

AC: 2 pole - 3 VA inrush,2 VA sealed k

I

%y, y Ig.

3 pole - 3.7 % inrusn,2.7

• sealed DC: 1.2 watts standard,3 watts maximurn i

.a l

Type KX:

f' 4.&-

8F *$

AC: 3.7 m inrush. 2.7 m senkxl 2,4 i

DC:1.2 watts standard,3 watts maximum 1 D Type KL:

g 9,4e] rp -j A :2. VA la ch. 0.6 % untatch l

i General Terminets: Solder / plug-m E:=j'g Ut/CS A: Type K with recommended Class 8501 Type NR Socket.

T

. s cEN NLD Class l1

~_m i

Type KL TYPE KF Qual Dimensens-CP2l l

D ///>41.ytrif 12-12

. ~

.~..

RPR 24 '95 16t S3 t1KW POWER SYSTEMS R

P.12 17/94 General Purpose Relays

.t Type K - Plug-in Relay Application Data, Dimensions, Wiring Diagrams Class 8501 l

Contact Ratings Wiring Diagreme ac oc b

^"*'**

Amperas A

t-y 120 to KU12. KUD12 KP12,KPD12 Mu g

$2.

,12 848

'0*

,i _

l KL12 d

1. 4o ice w

w

,e ae 4

1

'i saa so w

as--

e 3 pole concee newe a 30 Amp men. Inter towm et awre,es e as 3 poissL eommuous

'8

'3

}

Operating Data

$,'$33 Pick.Up Time:

KF13, KF012 i

Lamh Types KF, KP, KU, KX - Approxmately 15 ms a

Type KL - Approxsmately 25 ms KLD12 E

Drop-Out Tirne:

3 Types KF, KP, KU, KX - Approxmately 10 ms Approximate Dimenelons i

Type KL-Approximately 25 me i

Opereting 11pmperature Range:

?

Types KF, KP, KU, KX AC: 2 po4: 45*C to +55T ( 49"F to +131*F)

-1Y-s 3 polo:45*C to +45'C (-49'F to +113*F) g

-]

DC 45'C to +70*C (-49'F to +158*F)

Q

• g,,

9 AC/DC: a5*C to +70"C (-49"F to +158'F)

]

1#

8

{escus, f A bm Contacts I

Conf 6guration: 2 or 3PDT (2 or 3 Form C)

Ratings: See table above J

Motorial: Silver cadmium oxsde rg Coiis 2

j Dutyt Continuous rated costs j""

Availab4e Voltages:

J See Stocked Relays page 2 52. For a 220VDC input. use a 110VDC relay with a 10,000 ohm SW wire-wourc resistor in n

[

%p8 KU and KX bpe KP AC: +10, 15% of Nominal Voltage at 25"C (77'F)

DC: +10, -25% of Nominal Voltage at 25'C (77*F)

D Burden:

hp LYT fT' t

g Type KP-AC: 3 VA inrush,2 % sealed I

1

.p DC: 1.2 watts standard,3 watts marmum l

m--

r 9

24 0 Types KU, KF:

I 9

AC: 2 pole - 3 VA inrush,2 VA sealed i*

g

=

- A @g 9_y, "9,

3 pole - 3.7 VA inrush. 2.7

• sealed k

j DCg.2 watts standam,3 watts maximum

,, ap AC: 3.7 VA inrush,2.7 W sealed DC: 12 watts standard,3 watts maximum tys.

Type KL:

AC: 2.0 VA latch,0.6 VA uniatch Q

2 a

.,.AJa$

DC.1.22 wa:ts i

w, r.:::

7 "l"y: : 19 LJ G*a*ra' llerminals: Solder /ptugwn g

I.

UL./CSA: Type K with recommended Class 8501 Type NR Socket BIN DP8 Eb DP* EE l1

==e g

ouw oiman.

m sa

l

. APR 24 '95 16:43 MKW POWER SYSTEMS R

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MKW P@E(198BMlBiHFE@,inc.

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301 South Church Street

\\

Oni Station Square, Suite 100 M

kU Gf Rocky Mount,NC 27804 Phone: (919) 977-2720 h@

\\

TWX:

(510) 929 4 725 6ppep d

FAX:

(919)446-1134 l

TELEFAX

/

gM" b

\\

' 0' d

DATE:

April 24, 1995 p

r V

COMPANY:

Office of Nuclear Reactor Reaulation r// _ f9A~

FAX NUMBER:

301-415-1887 i

W

'[

ATTENTION:

Thomas Murlev n

REFERENCE:

_ Interim Report #10CFR21-0071I

a p

L/

0 FROM:

Michael Nudina V

f.

A/

y' p

(

• e @'v IF YOU DO NOT RECEIVE ALL PAGES LISTED, PLEASE CALL EXTENSION 2 5 3 PAGES (INCLUDING COVER SHEET):

12

/

I

Dear Sir:

Following this cover is a copy of an interim report for the i

Square D type KPD relay.

Should you have questions, please let us know, i

Sincerely, MKW POWER SYSTEMS, INC.

/Hude /Wo. A'7 Michael Nuding General Manager-Quality Assurance f

l

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