JIM

a uy

AMERICAN Co

215 NATIONAL AVENUE s SPARTANBURG, S.C. 29303

( 576-0356 . FAX: -574-6844 (p4* Roo-t73 - 2 3)

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EE-RM-96-400 COMMENT 02
i0.'30-J96 0: 51 TECO i'PIERICi iN INC. a BILL TREFFINGER

MG 1-1287

PART 12, PAGE 20

ATTACHMENT 11

N0.`78 P00L'007 =

TE$TS AND PERFORMANCE-A6

M01-12.57 CALCULATION FORM FOR INPUT-OUTPUT TEST OF INDUCTION MACHINE WITH

SEGREGATION OF LOSSES AND SMOOTHING OF STRAY LOAD LOSS

Ty bestion G Frame _63-7- xp `r Pha^g

Frequency _--- Volts Synchronous r/min Sethi No.

Degrees C Temperature R i s e Time Rating C 1L LSD Model No.

Stator Winding r sistance Betwftn 7ermlnab .- 0,-061*36 -01=6 L_ -- C

& hied Temperature For Resi§tmttce Correction (ts) :

Friction and Wlndaba , W&tte

lbrque, - ffi- - - (At, K)

Dnwnonww Co + Pi.

16 Corrected Torque iV r''1. 4) F

17 Power Output, watts Ub) x(4)/g:

R App2trnl T1t9n I r, r. wattr

(%

p

11- 7

q

I J

19 Stray-Load Un, watts Q (ll^

In ma Ccm ftew

20 Stator PR Loss, Watts, at { .s}®C yh ®C

SAM C^ x t c^D

er output. np tt'!)Z2Vb )Ryty'i3;^'^^ ^ 7 1

EE-RM-96-400 COMMENT 02
uL- I- 7b Ii; G r I - I tL U-SI- U UU.5^ r4bti44 4 4 r-U1

11^/SIQ/`Jb b^: ^^ I .C:U Hr9Lk 1 U- N INC. -^ BILL 1 KEN F-1 NULJ NU. d'fd t'WW^2100•!

(4) Is equal to synchronous speed - (3)

(10) Is equal to (7) - (8) (9)

(11) Is equal to (10) x (3)

Syn. r/min

(13) Is equal to(9)+(9)+(31)+(12)

(15) " ts" wilttdaga and tiring loss que of dy ometer and Its equal to

k(WA - WB)

n

Whom:

WA (Pi - 1 • Wh) s 0 S t)

We : . - Wh

P1 ut power in warrc required to give macki c when uylW tar dynamometer with saynamometer

artnawn: circuit open (Test A)

Wi - stator ^ i> sinwaussduring 7ka `A7,

St =slip in per unit during lbst "p"

IN -a input power in watts required to drive hine running free and uncoupled gest B)

We, : S loss in watts during Test "B"

Wh ® c 1 in WAN . .

C e d y n a m o m e t e r

k w9.549forTinN®m

k h 7.043 for T in lb m ffl

a ;v rotational spet! In r/mitt 'ng Test °°A"

(16) Is eqwW to ob ed torque (14) plus owadon (13)

(17) Is equal to -21

(18) Ls to (7) - (I7)

(19) Is equal to (1S) 4 (13)

(21) Is equal to (7) - (g) - (20)

(22) See Std 112, Standard Test Pror:t efor Polyp Induction Motors and Ge' ars,t . 5.4.1

(23) Is equO to synchronous speed - (22)

z ^ . (24) is equal to

SYIL rAnin

3s equal to AT* -

whom

A z Slope of cam of (19) vs. (16)1 using a linear re -on analysis.

Std- II2,' par 512A, Step 3.

T tedloupe sWW - (1 - .

Is equd to (8)+(12)+{20)+ )

(27) Is equalto (7) . ' .

(28) Is equ;al to 746

(29) Is equal t * 41a r

wh

m ® 4tbr Ovei-P

M ' for twe-phasc

S ary oft Ott: ' ed by plotting lino c g (6). spead (23), and efficiency (29) vs. output hp (28). then

cue fatting to set these values at Ise hp load points. Power factor is Computed far each precise load point from its

arnpercs and input watts. when input watts equal:

het x ?AZ 100

ettt®toney, percent

NE MA Swrxiard 11-12.1281 , reai I i-20-195S. t---- . MG1-1-0t.

EE-RM-96-400 COMMENT 02
Ul.. i -JU-- 7b 1.3 ^ r4 I " 1 CI.U'^r"t'u i3U..3J f ^fOt54^-4 HJ^+b-Yi1

0!3 1!D'5

1EaE

Std 112.1184

t

IEEE STANDARD TEST PROCEDURE FOR POLYPHASE

frequency impedance t,est. The followin g pro.

cedwre is eased:

Use Section 8, Fo - F-3, starting with lane 2,

with assumed value of rrls and Zalue of rr

based on stator winding ^peratun of ..t,,

Alter reaching heat: 21, cheek calculated value

of input watts v s measured-value of input

watts. Adjust assuaged value of r2 /s, and reiterate until calculated value of input watu

agrees with measured value of, input watts,

within 1%.=

Obtain -r2 b : multiplication of the final

assumed value of P2/8 by the measured value

of slip in per unit oI e'raata6aa speed. l'he

pYeuu11u9s a li va II&e value 01 r2 (Without toniperature co ction)' to be used in calculating the load poWorman olsetar6 •

-Corme't rs enai ra to the apeeile1 page=

tetra t, in aeon ce with I:.9 1

Determine performance at desired load points

following the format, shown in etion S,

Form F-3.

6.2.3.2.6 Maximum or bown torque

as a motor is de 'era a itom Se on 8, Form

F.3 using slip e

s=

"N. Lo K

(q11)

5.3.2 (AD) StatorVllt Loss. The stator 15R

loam (in watts) is eque1 to

1.5 FE for 3-phase

2.0 PB for 2-phaso

whfte

a,r,

I measured or aalculated ZU16 c nt per

terminal at the specified load

ft - direct-current Mislanee between any

t

two Una terminals corr®atod to a baud.

fed temperature (see 5.1.2)

In same Gases, it may be dasirebie to adjust the

eAulvaient earcult values to a with the measured

line current as well as the measured slip and input

watts from a rated lead tested 'point, Paler tin dater.

slash the performance at aLhPP nnint ® (61.e& t d

Itenn.

=

' 1o3G, ate).

The rodetlusV til, ia® Ailinail ra to nee _,.IU sl.e

casCutated value o[ input watts end Input currant both

mite with the mrapalrvrf value or input -att. mad mpoat

lips current within 1% tither circuit paeamet r r,heule

gat be adivstad. Obtain r by ^1 al^eliraiinn at else

.else at rgJ by thte Measured }ilyf nr

slip la per t-...t .,! ,j=achronous speed, Correct rl and

rl to the specified temperature t, in a4cordanee with

S I R. ®RA detevl..i»u pezi°or.uua,t..e addeairera toad paints

rvllowing the format shown in Section s, Furm F-3.

ttc:u wiz lQ-N tNt:. - BILL IKtrr1rautil

gi

Nu. Yt3 rudJfbWY

1 > Ts 7-S t 1- &,i~L- LCAP r- 1-,-4

The specified temperature used in making to.

sis ce * corrections (see 5,2.2.5.4) shall be

determined by one of the following, listed in

order of preference.

(1) Measured tomper4tiure rise by resistance

from a rated load temperature test plus 25 ®C,

(2) Specified temperature given in an ap.

plicable product standard, such as ANSI/

5.3.2 (All) Rotor 1 A Los's. The rotor 12R

loss, Including brush -contact losses for wound.

rotor machines, shall be determined from, t a

slip whenever the latter is ii6C tt yrietem jn

able, utinP Fql l& iii' 3,

Motor rotor VA Ion .m (Measured stator input

Stator !2R lobe Care lvO) . Slip

(1q 12)

wnere Me sup is in per unit of synchronous

speed.

Geneeratarrotor f2R loss (Measured stator

output $ Stator !ai loss + Core Ioss) • Slip

(Eq 13)

where the slip is W per unit of synchronous

speed.

0.3.3 (All) Core Lou and Frigtioh and Windage Lo.9sas. Refer to 6L2 for information on

the dt-LC iri4tion of tJIM mars- ION and MQ.

those and windage losses,

5.3.4 (C-E. ') Stray Load Loss, The stray

load loss is that portion of the total loss ,ao

a maohine not a*--ounted 10r by the sum of

fiction and Windage, alltor 15A loss, rotor

Pit loss, and no-load soul Snss_

5.3.4.1 (C-F) Indirect Measurement. The

total stray load low may be determined by

measuring the total lasses asacl subtracting from

these the sum of the friction, windage, Gatti

care loss, stator 12R loss, and rotor 12R loss.

For other load points, the stray load lotus

at rued to be proportional to the square

of the rotor current,

5.3.4.2 (E-F) Direct Measurement [1).

The .trey load lose - occurnne al, fitnrlamentsl

f ut_tlcy may be oetermiriad by applying

balm-i v,,1ypL* uusietat to me suitor.

windirw terminals with the rotor rcrrterc.t.

The electrical input minus the stator dada

1>,att it tnar enalfti o nes Is e.g....l by Vic lutluumental fesiquaasy a4a4,y 1-.,l lwea. busing me

test, bearing brackets and other structural

pares in which the currant might be indutiod

shall be in place , The current used in making

EE-RM-96-400 COMMENT 02
Z70 1J • 10 - GS.r{..^- Jr uL4 V VJJ f `.+oc i'i 6iJ'ti.J V.L

10/30/96 09:54 TECO AMERICAN INC. 4 BILL TREFFINGER

EST METHOD; ACCORDING TO IEEE -1 12 METHOD - S AND NEMA MG1

NO.278 P004/007

 EE-RM-96-400 COMMENT 02
10/30/96 09:54 TECO AFRICAN INC. -> BILL TREFFINGER

,Corr ddata(9-ts°C

per IEEE-112 & NEMA MGI -12

Then calculate Wsll (slope) Tz

(T= toad int torque)

NO.278 P005/007

(i) TE00's teat oro Urfa along with t tSt r r't m IFFF-11P R NFMA MG1.12

L859 aaMUat 4 LY vo inn ®l ica 1, 0 11g" should Lov uu, , euvid LU I' ' .

Q IEEE-112. f M. 5.2.2.5.4. the following rmexlwi lrmp "tp" Rhn„ lr1 ho

'

to

ut M dell laid tamp. ftv io 1,161 1, juuuujud.

FIFI. INVSULAI1ON

l:Mr, A f F

is 75 9 115 130

- I rom the loss and ofl ut (ut uutltut), wfiiafency can ue calculated.

(ii) If original test at cold condition is corrected by using to (25®C + tamp rise) to calculate the

toss, the Wcu1 & Wcu2 w o uld be lower; and efficiency would become higher. This is not

ooncidorod to moot IEEE 1 10 FAc d amd NCMA M01-m

W = Input powe Fall (slope)T&+ (Intercept)

output - Use load point (1) thru (6) to find (slope)

power & (intercept)

--(Wm -- m+i+cu1 +Wcu2) t and

Wi+Wcu1 + with smooth the ay load loss data by using

Wcu2) @ tt a linear regression analysis:

EE-RM-96-400 COMMENT 02
10/30/96 09:55 TECO AMERICAN INC. i BILL TREFF I NGER NO.278 P006/007

IV. Explanation:

There are five types of loss for 3-phase SCIM, i.e. Wm, WI, Wcul, Wcu2 and Wail,

derived from the following,

Original (G) coree d date@ to t Ci load paint (4)

ITEM @ t t __j per IEEE-t 12 8 NEMA MG1-12 (l]

Wm From no-load with Wen and WI segregated 421 421

Ali Should be the same value no matter @ t or is

Wcul = 1,51 17 1.5 R1,ts

K + is

- - -- (1) R1,ta = R1,t

K+t

K 234.5 for pure copper

225 for aluminum based on a

volume conductivity of

(t' = another teat temp, ex., cold condition)

Wcul should be corrected to (ts, Rita).

Whether original test is conducted at (t, R1t)/ho

or (t', R1 t')/cold condition, the Wcul is unique

depending on "ta" only for the same motor.

The higher the temp. rise, the higher the Rats &

Wcu2 should be corrected to (ts, Sts).

Whether original test is conducted at (t, St)/hot

or (t', St')/cold condition, the Wcu2 is unique

depending on '" only for the same motor.

The higher the temp. rise, the higher the Sts &

Wcu2

EE-RM-96-400 COMMENT 02
10/30/96 09:55 TECO RMERICAN INC. a BILL TREFFINGER NO.2?® P00?/03?

ITEM

1. Sample motor: ME' HE 4P=75HP, 604 V, S/N 71935 001

- Please refer to AI 1 ACHMENT I for original TOM data

- Please refer to ATTACHMENT 11 for efficiency calculation according to NET MGI -12.57

& IEEE-112 (Method- B)

11. Elf. OUTPUT/INPUT _ (INPUT - LOSS)/INPUT = OUTPUT/(OUT PUT + LOSS)

Elf. can be calculated from loss and input (or output)

Ill. Loss (= 25 to 150% load) @ t and to IC is tabulated below,

where t original test temp. (IC)

is = 25'b + 6 ( 1- full load temp. rise, 'C

"Corrected temp." according to IEEE-112, 1 984, 5.3.1

DATA

Original

data @t®C

(Ex. t t)

EFFICIENCY CALCULATION

BASED

IEEE-112

1 2

Wm wtt 429.6

W1 (waitt) 714.7 -- -

W l (watt

Vs11 n

watt

117.7

49.2

150.6

1461.8

193.0

288.1

1883.0

Elf. % .6 1 _W.7

9C lead

Wm watt 429.6 426.6

Corrected Wi 714.7 714.7

data @ tS t Wcul (we 117.0 258-H

per IEEE-112 Wcu2 w 48.9 191.8

NEMA MG1 Well tt 22.6 $9.7

12 tt 1332.6 1681.8

(Ex. is 66 t) 91.5 94.4

Note: Wm - Friction and windage 1029

Wi - Core l®

Wcul = Stator N loss

Wcu2 = Rotor loss

Well = Stray-load loss

3065.0

12/3.0

1 262-2

556.9

4224.0

94.2

A PJ s

Total 05.5 = Wrn t Wi t Wcu1 -I- WcuZ -r Wall

408.0

500.4

2535.0

94.3

76.4

424.4

714.7

464.b

406.4

201.0

421.0 417.3 412.6

714.7 714.7 714.7

317.2 1281.0 1 1875.0

765.2

848.0

94.3

#001

421.0

1 270.0

664.0

4347.0

94.1

L_122.11

417.3

714.7 714.7

760.4

366.6

2230.0

95.0

2003.0

1 021.0

147.7

412.6

714.7

801.3

5783.0

93,5

AMERICAN INC.

EE-RM-96-400 COMMENT 02