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8/18/2019 TMedidaCombinadosde las normas

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Co mb ined Inst rum en t Tra nsf o rmers

Types N5, N5H


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Co mb ine d Inst rument Tra nsfo rmers

Introduction

Trench is a recognized w orld leader in

the design and m anufacture of high

voltage equipm ent for application on

electric utility and high energy industrial

system s. A s part of Trench's product

scope, the C om pany produces a diversifiedrange of Instrum ent Transform ers w hich

are installed on 69 - 800 kV

electrical system s. Instrum ent

Transform ers include: Voltage

(Potential) Transform ers (both

inductive and capacitive type),

C urrent Transform ers and C om -

bined Instrum ent Transform ers,

also referred to as m etering units

(voltage and current transform er

in one unit).

Com bined Instrum ent Transform ers

m ust convert transm ission class

voltages and currents to standard-

ized low and easily m easurable

values, w hich w ill be used for

m etering, protection and control

of the high voltage system .A s

such, the need for accurate and

reliable voltage and current trans-

form ation is essential.

This brochure w ill detail the features and

characteristics of types N5 and N 5H

C om bined Instrum ent Transform ers.

Please refer to Trench brochure E210 for

additional general inform ation concerning

high voltage Instrum ent Transform ers.

Fig. 1

Type N5,

Combin ed In strum ent

Transformer


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Features

•m eet all IEC and A N SI m etering

and protection classes (other

standards on request)

•Hi-A C C ,0.15% accuracy units

available

•rated prim ary currents up to

3000 A

•applications from 35kV to

230 kV

•standard therm al burden ratings

of 2500-6000 VA (higher on

request)

•Q uality Assurance in accordance

w ith ISO 9001

•highly refined and processed

oil/paper insulation system

•low w eight and m inim umoil volum e

•excellent seism ic perform ance as

a consequence of optim ized

design of flanges, porcelain and

their interconnection

•excellent control of internal and

external insulation stresses

•herm etically sealed construction

using nitrile rubber gaskets

•essentially unaffected by stray

external m agnetic fields

•stable accuracy over a long

period of tim e

•perfect transient perform ance

•suitable for line discharging

•corrosion resistant alum inum

head polyester pow der coated

•oil expansion com pensation by

dry nitrogen cushion

•tw o tapped secondary voltage

w indings on low loss, low

leakage reactance, distributed

gap core

•only one foundation/support

structure required in the

substation as a consequence of

com bining the voltage and

current sensing functions in one

transform er Fig. 2 Sectioned view of a

typical N5 Combin ed

Instrument Tran sformer


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Cat alog Numbering

System

C atalog num bers are com posed of

three parts as show n in the exam ple

on the right.

•The TYPE contains the transform er

SERIES designation and the BIL (kV)

rating. In this exam ple, N 5-900

•The Voltage Transform er Suffix

represents the nom inal System

Voltage in kV. In this exam ple, 230.

•The C urrent Transform er Suffix is

listed in tw o parts, Prim ary

A m peres and Ratio A rrangem ents.

In this exam ple, 401 S.

Series

N5 D esign w ith current transform er in the dom e, voltage

transform er in tank, 0.3% accuracy class.N5H Sam e design as N5 w ith im proved accuracy rating of

0.15% H i-A C C TM design.

BIL (kV) Basic lighting im pulse insulation level.

System Volta ge N om inal system voltage kV.

Primary Amperes Indicates highest nom inal prim ary am perage.

(Suffix N o 1) For exam ple:

50 A = 500

200 A = 201

2000 A = 202

Rat io Arrangement s S- D ual ratio by secondary tap(For Current Transform er) P- D ual ratio by series-parallel of

(Suffix N o 2)prim ary

Blank- Single ratioM - M ulti- ratio by secondary tap

Met ering Unit Volt a g e Tran sfo rmer Selectio n (60Hz)

C atalog N um ber N om inal

Series BIL Type + System Rated Voltage Rated A ccuracy Therm al

(kV ) Voltage Trans. Suffix + Voltage Prim ary Ratio1 Both Secondary and Burden Burden

Current Trans. Suffix (from p.5) (kV) (Volts) Secondaries (Volts)3 Rating Rating (VA )

200 N 5-200-35-(N o.1) (N o.2) 34.5 20125 175/300:1 115/67.08 0.3ZZ 2500

250 N 5-250-46-(N o.1) (N o.2) 46 27600 240/400:1 115/69 0.3ZZ 4000

350 N 5-350-60-(N o.1) (N o.2) 60 34500 300/500:1 115/69 0.3ZZ2 4000

350 N 5-350-69-(N o.1) (N o.2) 69 40250 350/600:1 115/67.08 0.3ZZ 4000

N 5 550 N 5-550-115-(N o.1) (N o.2) 115 69000 600/1000:1 115/69 0.3ZZ 6000

650 N 5-650-138-(N o.1) (N o.2) 138 80500 700/1200:1 115/67.08 0.3ZZ 4000

750 N 5-750-161-(N o.1) (N o.2) 161 92000 800/1400:1 115/65.71 0.3ZZ 6000

900 N 5-900-230-(N o.1) (N o.2) 230 138000 1200/2000:1 115/69 0.3ZZ 6000

1050 N 5-1050-230-(N o.1) (N o.2) 230 138000 1200/2000:1 115/69 0.3ZZ 6000

200 N 5H -200-35-(N o.1) (N o.2) 34.5 20125 175/300:1 115/67.08 0.15Y 2500

250 N 5H -250-46-(N o.1) (N o.2) 46 27600 240/400:1 115/69 0.15Y 4000350 N 5H -350-60-(N o.1) (N o.2) 60 34500 300/500:1 115/69 0.15Y 4000

350 N 5H -350-69-(N o.1) (N o.2) 69 40250 350/600:1 115/67.08 0.15Y 4000

N 5H 550 N 5H -550-115-(N o.1) (N o.2) 115 69000 600/1000:1 115/69 0.15Y 6000

650 N 5H -650-138-(N o.1) (N o.2) 138 80500 700/1200:1 115/67.08 0.15Y 4000

750 N 5H -750-161-(N o.1) (N o.2) 161 92000 800/1400:1 115/65.71 0.15Y 6000

900 N 5H -900-230-(N o.1) (N o.2) 230 138000 1200/2000:1 115/69 0.15Y 6000

1050 N 5H -1050-230-(N o.1) (N o.2) 230 138000 1200/2000:1 115/69 0.15Y 6000

1 Voltage transform er elem ent is A N SI G roup 3, for connection phase-to-ground on solidly grounded "w ye" system s.2 0.6ZZ on tap of secondary and tertiary w indings.3 Refer to table on next page "M etering U nit C urrent Transform er Selection" for Current Transform er Suffix num bers.

4 C ontact factory for CSA standard ratings and 50 H z applications.

Mete ring Unit Selection

N5-900 - 230 - 401 S

Type Voltage C urrent

Transform er Transform er

Suffix Suffix


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Accura cy Select ion - Vo lta g e Tra nsfo rme r

Series BIL Type + (Suffix No. 1+ No.2)

(kV )

200 N5-200-35- (No.1) (No.2)

250 N5-250-46- (No.1) (No.2)

350 N5-350-60- (No.1) (No.2)

350 N5-350-69- (No.1) (No.2)

N 5 550 N 5-550-115- (N o.1) (N o.2)

650 N5-650-138- (No.1) (No.2)

750 N5-750-161- (No.1) (No.2)

900 N5-900-230- (No.1) (No.2)

1050 N 5-1050-230- (N o.1) (N o.2)

200 N5H -200-35- (No.1) (No.2)

250 N5H -250-46- (No.1) (No.2)

350 N5H -350-60- (No.1) (No.2)

350 N5H -350-69- (No.1) (No.2)

N5H 550 N5H-550-115- (No.1) (No.2)

650 N 5H-650-138- (N o.1) (N o.2)

750 N 5H-750-161- (N o.1) (N o.2)

900 N 5H-900-230- (N o.1) (N o.2)

1050 N 5H-1050-230 -(N o.1) (N o.2)

Prim ary Ratio A rrangem ent(Suffix N o.2)

N om inal C atalog S P Blank M 1

A m peres (Suffix N o.1) (D ual Ratio) (D ual Ratio) (Single Ratio) (M ulti-Ratio)

50 500 25/50:5 - 50:5 -

100 101 50/100:5 - 100:5 -

150 151 75/150:5 - 150:5 -

200 201 100/200:5 - 200:5 -

300 301 150/300:5 - 300:5 -

400 401 200/400:5 - 400:5 -

600 601 300/600:5 - 600:5 600:5M R

800 801 400/800:5 - 800:5 -

1000 102 500/1000:5 - 1000:5 -

1200 122 600/1200:5 - 1200:5 1200:5M R

1500 152 750/1500:5 - 1500:5 -

1600 162 800/1600:5 - 1600:5 -

2000 202 1000/2000:5 - 2000:5 2000:5M R

3000 302 1500/3000:5 - 3000:5 3000:5M R

100 101 - 50X100:5 100:5 -

150 151 - 75X150:5 150:5 -

200 201 - 100X200:5 200:5 -

300 301 - 150X300:5 300:5 -

400 401 - 200X400:5 400:5 -

600 601 - 300X600:5 600:5 -

800 801 - 400X800:5 800:5 -

1000 102 - 500X1000:5 1000:5 -

1200 122 - 600X1200:5 1200:5 -

1500 152 - 750X1500:5 1500:5 -

1600 162 - 800X1600:5 1600:5 -

2000 202 - 1000X2000:5 2000:5 -

3000 302 - 1500X3000:5 3000:5 -

1 M ulti-ratio taps in accordance w ith A N SI Standard C 57.13

Met ering Unit Current Tran sfo rmer Selection

A ccuracy Rating

Series (90% thru 110% of Burden

N om inal Voltage)1 Rating 2

N 5 0.3% O ,W ,X,M ,

Y,Z,ZZ

N5H 2 0.15% 3 O ,W ,X,

M ,Y

1 The accuracy rating is based on the sum of the burdens on both

w indings not exceeding the values listed above.

2 For additional inform ation on H i-A C C TM H igh A ccuracy

Transform ers, consult factory.

3 The 0.15% parallelogram is constructed using the sam e principlesas the 0.3% parallelogram in accordance w ith A N SI Standard

C 57.13.except the m axim um phase angle and ratio correction

factors of the 0.15% parallelogram are half those of the

0.3% parallelogram .


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Accura cy Select ion - Current Tra nsfo rme r

Applied Creepage Strike

Series BIL W ithstand Distance Distance

(kV) (kV) in/m m in/m m

200 70 34/864 13/330

250 95 52/1321 24/610

N 5 350 140 52/1321 24/610

550 230 101/2565 42/1067

650 275 131/3327 54/1372

750 325 169/4293 65/1651

900 395 169/4293 65/1651

1050 460 214/5436 84/2134

200 70 34/864 13/330

250 95 52/1321 24/610

N 5H 350 140 52/1321 24/610550 230 101/2565 42/1067

650 275 131/3327 54/1372

750 325 169/4293 65/1651

900 395 169/4293 65/1651

1050 460 214/5436 84/2134

Therm al M echanical Short-Tim e

Ratio1 Rating C urrent Therm al C urrent

Factor2 Rating Rating

at 30°C kA RM S M ax. (1 sec.) kA RM S

25/50:5 1.5 4 3

50/100:5 1.5 8 6

75/150:5 1.5 12 10

100/200:5 1.5 15 13

150/300:5 1.5 24 20

200/400:5 1.5 30 26

300/600:5 1.5 60 39400/800:5 1.5 60 52

500/1000:5 1.5 60 60

600/1200:5 1.5 120 90

750/1500:5 1.5 120 90

800/1600:5 1.5 120 90

1000/2000:5 1.5 120 90

1500/3000:5 1.0 120 90

100:5 1.5 8 6

150:5 1.5 12 10

200:5 1.5 15 10

300:5 1.5 24 20

400:5 1.5 30 25

600:5 1.5 30 25800:5 1.5 60 50

1000:5 1.5 60 50

1200:5 1.5 60 50

1500:5 1.5 120 90

1600:5 1.5 120 90

2000:5 1.5 120 90

3000:5 1.0 120 90

M etering A ccuracy Relay A ccuracy

Series % of N am eplate Rating O ptional Burden Relay

100% 10% 5% 1% Rating C lass C lass

N ot N ot

N 5 0.3% 0.6% specified specified BO .1-1.8Ω C200 3

by A N SI by A NSI

N 5H 0.15% 0.15% 0.15% 0.3% 4) BO .1-1.8Ω

1 For additional inform ation on H I-A C C TM transform ers consult factory.

2 The 0.15% parallelogram is constructed using the sam e principles as the 0.3% parallelogram in

accordance w ith A N SI Standard C 57.13, exept the m axim um phase angle an d ratio correction

factors of the 0.15% parallelogram are half those of the 0.3% parallelogram .

3 Rating is based on highest ratio. H igher relay ratings are available.

4 A vailable on som e ratios listed below (consult factory for details)

1 D ual-Ratio H igh A ccuracy transform ers (N ot Listed) are available, please consult factory.

2 C urrent transform ers w ith higher rating factors are available, please consult factory.

N ote: For m ultiple current transform er secondary w indings, please consult factory.

Electrical Characteristics


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Type D im ensions in.(m m )1 Creepage W eight O il

Series BIL (kV) A B C D E F G H I J K in(m m )2 lb(kg)2 gal(l)

N 5-200 200 64.63 52.88 13.40 24.18 14.00 20.75 20.36 23.50 23.25 17.25 16.56 34 800 35

(1642) (1343) (340) (614) (356) (527) (517) (597) (591) (438) (421) (864) (363) (132)

N 5-250 250 78.00 66.76 24.28 24.69 14.00 20.75 20.36 23.50 28.00 22.25 16.56 52 870 43

(19819 (16969 (617) (627) (356) (527) (517) (597) (711) (565) (421) (1321) (395) (163)

N 5-350 350 78.00 66.76 24.28 24.69 14.00 20.75 20.36 23.50 28.00 22.25 16.56 52 870 43

(1981) (1696) (617) (627) (356) (527) (517) (597) (711) (565) (421) (1321) (395) (163)

N 5-550 550 93.17 74.06 42.36 19.62 19.50 22.25 23.00 25.00 31.59 25.25 11.38 101 1420 57

(2367) (1881) (1076) (498) (495) (565) (584) (635) (802) (641) (289) (2565) (644) (216)

N 5-650 650 111.11 97.00 54.38 27.88 19.50 22.25 23.00 25.00 31.25 25.25 19.00 131 1370 70

(2822) (2464) (1381) (708) (495) (565) (584) (635) (793) (641) (483) (3327) (621) (265)

N 5-750 750 144.88 118.88 65.21 36.94 24.63 27.50 28.12 30.25 31.75 25.25 29.32 169 2300 114

(3680) (3020) (1657) (938) (626) (699) (714) (768) (806) (641) (745) (4293) (1043) (431)

N 5-900 900 144.88 118.88 65.21 36.94 24.63 27.50 28.12 30.25 31.75 25.25 29.32 169 2300 114

(3680) (3020) (1657) (938) (626) (699) (714) (768) (806) (641) (745) (4293) (1043) (431)

N 5-1050 1050 163.32 137.32 83.65 36.94 24.63 27.50 28.12 30.25 31.75 25.25 29.32 214 3000 159

(4148) (3488) (2125) (938) (626) (699) (714) (768) (806) (641) (745) (5436) (1361) (602)

1 Series N5H H igh A ccuracy Units have sam e dim ensions as Series N5

2 W eights and dim ensions are approxim ations only and are not intended for construction purposes.

Dimen sion a l Ta b le


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Subject to change w ithout notice

04.2000

E 219.21

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