ML20126M928

Rev 7 to Procedure MT-GE-008, 480 Volt & Under Circuit Breaker High Current Testing

ML20126M928
Person / Time
Site:	Susquehanna
Issue date:	01/04/1988
From:	PENNSYLVANIA POWER & LIGHT CO.
To:
Shared Package
ML20126M903	List: ML20126M900 ML20126M928 ML20127A496 ML20127B427 ML20127B519
References
FOIA-92-212 MT-GE-008, MT-GE-8, NUDOCS 9301110143
Download: ML20126M928 (15)

Text

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PROCEDURE COVER SHEET n

~ PENNSYLVANIA POWER &.1GHT 00.

t, l SUSQUEHANNA STEAM ELECTRIC STATION 4'

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480 VOLT AND UNDER CIRCUIT BREAKER j

HIGH CURRENT TESTING

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EFPECTIVE CATE _/.!'/.!f(Ff_

EXPIRATION DA

.x REVISED EXPIRATION DA g

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?RCCEDURE TYPE:

(Check only ene)

ALTERNA' REVIEV.1YPE:

(Check only one)

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i PORC MTG. NO.

(N/A-if NON-PORC or ALTERN. REV) y w

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Oate Lg j iPrecareo by, g Oate M -; z

Reviewed by J J @ % MA FI Oate

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Q11}g3920731 CORM A0-0A-101-1, Rev. 3, Page 1 of 1 HYMANSO92-212 PDR

MT-GE-008 Revision 7 Page 2 of 13 1.0 PURPOSE This procecure specifically addresses High Current Testing of Molded Case (1) AC Circuit Breakers, Overloads and Relays (R) OC Circuit Breakers and Overloads (3) Lightir.g Circuit Breakers and (4) Ground Relays; on equipment rated 480 Volts and below.

2.0 REFERENCES

2.1 Multi-Amp, Model MS-1 A, Instruction Manual.

2.2 Multi-Amp, Model CB 14X, Instruction Manual.

2.3 Multi-Amp, Model CB 7725, Instruction Manual.

2.4.vanuf acturer's literature applicable to the particular Breaker or Motor Overload Relay being tested.

2.5 Manufacturer's Time / Current cu use 2.6 Breaker setpoint data sheets (R.S.C.N. 's or other setpoints, e.g. Tech.

Specs. or per A0-0A-402).

2.7 Surveillance Procedure SM-106-000.

2.8 Technical Specifications Section 3/4.8.3.

3.0 PREREQUISITES Operations has released equipment for testing.

4.0 PRECAUTIONS None 5,0 PROCEDURE NOTE (1): Main contacts of device shall be electrically monitored for position indication.

HOTE (2): Those steps of this procedure designated by an asterisk (*)

immediately to the left of the step number require entries to be-g recorded on the Data Form.

--,. ~. -

e

l MT-GE-008 Revision 7 Page 3 of 13 5.1 Breaker setuo 5 1.1 Remove breaker from cubicle.

l 5.1.2 Document ano determinate breaker leads prior to connecting breaker to test set.

5.1.3 Verify breaker " terminal mounting screws" are securely tightened (Reference Attachment 0).

5.2 Molded case circuit breakers - Magnetic Trip.

5.2.1 Determine and record "As Found" minimum trip current for each Individual breaker pole.

NOTE:

Allow sufficient time between successive tests on each breaker pole to allow for breaker internal cooldown.

5.2.2 Adjustable Breakers:

a.

External Adjustment Adjust breaker, if necessary, to bring trio point-within tolerance of value specified in setting data and retest breaker.

b.

Internal Adjustment (if required)

(1) Use a soldering gun or pencil to heat and unlock breaker internal adjustment screws.

(2) Use Loc-Tite " stud-lock" #73-71 or equivalent on breaker internal adjustment screws af ter final adjustment, c.

Record "As left" minimum trip current.

5.2.3 Determine and Record "As Lef t" trip. (operating) time of g

breaker at > 120% of set point value.

Record actual test current applied.

l NOTE:

This value shall be > 150% of set point value for breakers specified in SM-106-0XX or SM-206-0XX.

a.

If trip time " instantaneous" <.05 seconds then the magnetic setting is complete.

b.

Trip time not " instantaneous" >.05 seconds.

MT-GE-008 Revision 7 Page 4 of 13 NOTE:

If performing SM-106-0XX or SM-206-0XX, section 5.2.3.b of this procedure does not apply.

1).

Determine and record acceptance trip curve time at the test current value from the manufacturer's breaker curve.

NOTE:

This value must be. compared to the operate

~

time of an interpolated curve in the range for the specific breaker.

2)

Determine and record if above "As lef t" trip time versus curve time meet acceptance criteria.

Adjust or replace breaker as necessary.

5.3 Moldec case circuit breakers - Thermal Trip:

Determine and record operating time of each individual breaker pole at 3 times (3X) the circuit breaker rating.

NOTE:

Allow sufficient time between successive tests on e&ch breaker pole to allow thermal element to cool.

S.4 Molded case circuit breaker - mechanical check:

verify breaker can be mechanically tripped and reset.

NOTE:

Reset dif ficulties (if any) may be -due to reset lever-mechanical problems, e.g.-reset lever having bent edge (Reference Attachment E).

5.5 Motor overload relays:

Determine and record operating time of each incividual relay pole at 3 times (3X) the heater current value, s

5.6 Ground relay-5.6.1 Determine and record ground relay pickup current.

5.6.2 Adjust ground reiay potentiometer, if necessary, to bring trip point within tolerance of-value specified in setting data and retest breaker.

NOTE:

Main contacts of breaker do not carry nor interrupt current source.

Test current source must therefore be manually removed from circuit.

l

_ _ _ - _ _ - _ _ - _ _ _ _ _ _ - _ _ _ _ - _ - _ - _ _ _ _ _ _ _ _ _ _ _ _ - - _ _ _ _ - _ _ _ _ - - _ _ _ _. _ _ _ _ _ _ - _ _ - _ _ ~

MT-GE-008 Revision 7 Page'5 of 13 5.7 Breake eestoration l

5.7.1 Reterminate breaker leads to breaker as per cocumentation ir.

step 5.1.2.

(Not required if performing SM-106-0XX or SM-206-0XX) 5.7.2 Reinstall breaker in cubicle.

(Not required if performing SM-106-0XX er SM-206-0XX) 5.8 operability Check Verify breaker and associated circuitry are correct by performing equipment operability check (i.e., verify valve strokes, equipment and/or motor rotates in proper direction).

(Not required if performing SM-106-0XX or SH-206-0XX) 6.0 ACCEPTANCE CRITERIA Tyoe,

Required Setting Preferred _ Setting

6.1 Magnetic

(5.2.2) Actual trip current: 25% of specified value

+25%, -0% of-specified value (5.2.3) Actual trip time:

<0.05 seconds

+0.%, -25% of mfg within or curve value 225% of mfg curve value

6.2 Thermal

Operating Time 215% of specified value

+15%,-0% of specified value 6.3 Motor Overload:

Operating Time

15% of specified value

+15%,-04 of specified value

6.4 Ground

Pickup Current 215% of specified value +15%,-0% of specified value

-6.5 Operability Check Satisfactory

AttacFient A MT-GE-008 Revision 7

~EST RECORD Page 6 of 13 A.C. WOLbhC CASE 3REA<ERS, 90 TOR Ovit:LCADS_ AND GROUNO DELAYS

$yst.#

W.A.#

EM#

0( ). non_0 ( )

BreakerM MFG.

Type Drint #

Curve #

Curve Date B*eaker: Rating

_(amps.); Magnetic Set Point (amps.)

Adjustable (from)

(amps.)

(to)

(amps.)

Overlcad:

No.

Setting Rating (from)

(amps.)

(to)

(amps.)

Test amps Ground reiay: Setting (amps.)

5.1.2 Lead Remeval OccumentatTon:

134tials Date _

Verified By:

Perforecc By:

Initials Oate 5.7.1 Lead Reinsta11ation:

Performed By:

Verified By:

Initials Oate Initials Date "As FOUND

'AS LEFT" (5.2.3) TP BMR

~

(5.2.2.c)

(5.2.1)IP MIN. TRIP TRIP TEST 5.2 MAGNE::C fTt MTN YR

~

PHASE CURR. ( AMPS)

CURR. (AMPS)

CURR. ( AMPS)

TIME (SEC)

A 3

C "AS LEFT" 5.2 MAGNETIC

[5.2.3.b.(1))

(5.2.3.b(2))

~~

PHASE TRff"TdRVE ACCEPT.

TIME (SEC)

CRITERIA MET? _ _ _

A B

C ennu ut.ee.nne_,

coo c o.m. 1 er 7

Attachment A MT-GE-008 Revision 7 IEST RECORD Pa;e 7 cf 13 A._C. SOLDhD CASE 2REAKERS, MOTOR OVERLOADS AND GRCUND RELAYS SYST#

BREAKER #

WA#

5.3 THERMAL PHASE AS FOUND DATA AS LEFT DATA A

B

~

C

$.5 OVERLOADS PHASE __

AS FOUND DATA AS LETT~ DITA

-~

A B

EIOUND PHASE AS FOUND OATA AS LEFT DATA N

TEST INSTRUMENT

!.0 #

CALIBRATION OUE diTE 5.8 Operability Check Satisf actory. YES (

)

NO(

)

Date ~

Performed by:

Date:

Reviewed by:

Date:

acceptable:

(yes/no)

Comments:

FORM MT-GE-008-1, Rev. 5, Page 2 of 2

Attachment B MT-GE-008 Revision 7 TEST RECCR0 Page 8 of 13

'D C. HOLDE0 CASE BREAKERS. MOTOR OVERLCADS Syst.#

W.A.#

EM#

0(

), non 0 ( )

Breaker #

MFG, Type Print # _

Curve #

Curve Date Breaker: Rati g (amos)

Magnetic Set Point

(

_ amps.)

Adjustable (from)

(amps.)

(to)

(amps.)

~

Overload:

No.

Setting Rating (from)

(amps.)

(to)

(amps.)

Test amps 5.1.2 Lead Documentation:

a "AS FOUNDd "A$ LEFT" 5.2 MAGNETIC

( 5.1. Q (5.2.2.c)

(5.2.3)-

PHASE MIN TRIP MIN. fRIP TRIP TE$T TRT>7 FER CURR. ( AMPS)

CURR. (AMPS)

CURR. ( AMPS)

TIME (SEC)

A C

" A5 LEU" 5.2 MAGNETIC

15. 2. 3. b. ( 1 ) )

(S.2.3.b(2))

PHASE TRlP CURVE ACCEPT.

TIME (SEC)

CRITERIA MET?

_B C

FORM MT-GE-008-2, Rev. 5, Page 1 of 2

Attachment C MT-GE-008 Revis hn 7 TEST RECORD Page 10 of 13

~

LIGWi!NG CIRCUIT BREAKERS Syst.#

W.A.# __

EM#

0( ), een Q ( )

Breaker #

MFG.

Type Lighting / Power pane 1#

Location __

CKT#

Serial #

Voltage Drint#

Curve #

Curve Date Breaker:

Rating (amos) b.l.2 Lead Documentation:

~

l "AS FOUNO"

" AS LfM" 5.2 MAGNETIC (5.2.1)

(5 2.2.c)

(5.2.3)

PHAST Ml D RIP MIN. TCP V F TEST TRIP CPER CURR. (AMPS)

CURR. ( AMPS)

CURR, (AMPS) TIME (SEC)

A B

C

~

" AS t.E FT "

5.2 MAGNETIC (5.2.3.b.(1))

(5.2.3.b(2))

~

PHA5I -

TRIP CURVE ACCEPT.

TIME (SEC)

. CRITERIA MET ?

A B

5,3 THERMAL PHA51 fEST CURRENT AS FOUN0~0ATA AS LEFT DATI A

amps, B

amps.

C amos.

FORM MT-GE-008-3, Rev. 4, Page 1 of 2

4 Attachment C MT-GE-008 Revision 7 TEST RECQR0 Page 11 of 13 LIGHTING CIRCUI' BREAKER $

TEST INSTRUMENT

!.0.#

CALIBRATICN CUE CATE

~

Performed by:

, Date:

Reviewed by:

, Date:

, acceptable (yes/no)

FORM MT-GE-008-3, Rev. 4, Page 2 of 2

5 g

Attachtrent D MT-GE-008 Revision 7 Page 12 of 13 1

DETAIL OE BREAKER TERMINAL. ASSEMBLY i

TERMINAL CAPTIVE SCREW:

i / TERMINAL iL.--J 1

-) pCA8LE TERMINATION

M_

1. TERMINAL MOUNTING SCREWl i

a xy

.J p.

, ACPPER BUS 8AR

]MERMINAL MOUNTING NUT e

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Attactment B MT-GE-008 Revision 7 TEST 3_ECORD Page 9 of 13

'O.C.

MOLOFC CASE DREAVERS, MOTOR OVERLCACS SYST#

BREAKER #

WA*

5.3 THERMAL PHASE AS FCUND DATA AS LE_FT DATA POS NEG

~~

5.5 QVERLOADS PHASE AS FCUNO DATA AS LEFT 0ATA POS NEG IIST INSTRUMENT ITB. #

CAllBRATION OUE DATE~~

5.8 Cperability Check Satisf actory. YES (

)

NO (

)

Date Date:

Performed by:

Reviewed by:

Date:

acceptable:

(yes/no)

Comments:

v I

FORM MT-6E-008-2, Rev. 5, Page 2 of 2

A_LLEGATICN PANEL DEC1510MS l

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PANEL ATTENDEES:

ALLEGAT!ON NO.

A5"Ei-A - 00 */_7 Chair ~an -

f Cd.(_ (Alf d [/ 7 (Mtg. /I) 2 3 4 5)

Eranch Chief -

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ATE:

PRIORITY:

High Low Section Chief -

q SAFETY SIGNIFICANCE:

Yes No Unknow Idb lN O M S~

j 8/. MTN[ NW 'IW# #

CONCURRENCE TO CLOSEOU1:

DD BC SC h

CONFIDENTIALITY GRANTED:

Yes ACT10N:

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- ALLEGATION PANEL DECISIONS I

SITE:_ (4 TdlW 6 M M M /

PANEL ATTENDEES:

ALLEGATION NO.:

N'f-9 7-#1 "

D Chairman -

I, c'* h.f

[ ['2 M W (Mtg. 1Q3 DATE:

4 5)

Cranch Chief -

PRIORITY:

High 2

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A* M&//

SAFETY SIGNIFICANCE:

Yes No C MMf*V N6 dAf j

DD @ SC I UW# ## N CONCURRENCE TO CLOSE0VT:

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CONFIDENTIALITY GRANTED:

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