U-Series Air Circuit Breaker

U-Series

Air Circuit Breaker

LV &

MV Circ uit B reak ers

Leader of Technology Hyundai Heavy Industries' state-of-the-art technologies have created circuit breakers and contactors for electrical systems that are genuine masterpieces.

CONTENTS 04 Features

•

74 Dimensions

11 Structure •

•

13 Ratings

92 Ordering Codes

•

•

14 Protection Trip Relay (OCR) • 30 Accessories • 72 Circuit Diagrams

96 Technical Data

•

105 Operating Conditions

•

106 Ordering Sheet

U-Series Air Circuit Breaker HYUNDAI ACB meets your demands for high breaking capacity, full line-up, and optimized panel size. Various accessories and connection methods realize user-friendly handling.

U-Series

/ Air Circuit Breaker

Features | Full line-up |

460mm

•U-Series ACB maximize your choice and satisfaction with compact size and dual (UAN/UAS) model.

766mm 624mm

8m

36

399mm

m

328mm

B frame [100kA]

A frame [85kA] •630-2,000A(UAN) •630-1,600A(UAS)

C frame [100kA]

D frame1) [150kA] •4,000-6,300A(UAN)

•4,000-5,000A(UAN)

•2,000-4,000A(UAN) •2,000-3,200A(UAS)

※ - Breaking capacity is at AC500V. 1) D frame will be available from October 2013.

| Applications | •U-Series ACB offering high breaking capacity and advanced protection trip relay is suitable to cover various applications including buildings, data centers, industrials and so on. U-Series ACB protects these facilities from harmonic frequency by 100% capacity of N phase.

Buildings

Industrials

Electric power facilities

•Multipurpose buildings

•Broadcasting stations

•Steel/Metal

•Electric power stations

•Hospitals

•IT/Telecommunications

•Gas/Chemical

•Electric power substations

•Pulp/Paper

•Dispersed power generators

•Commercial buildings •Hotels

4

Data centers & Networks

•Renewable energy facilities

ACB

| Compliance with standards |  Standard •IEC 60947-1,2

International Electrotechnical Commission

•EN 60947-2

European Standard

•GB

China National Standard (Guojia Biaozhun)

•GOST R 50030.2-99 9

Government Standard of Russia

•GOST R 50030.1-2000


•KS C 4620

Korean Standards Association

 Approval •ISO 18001, 14001, 9001 •KS/KOREA

Korea Quality Certificate Standard Association

•CE

Community European

•GOST-R/RUSSIA


•CCC/CHINA

China Compulsory Certification

•KR/KOREA

Korean Register of Shipping

•GL/GERMANY

Germanischer Lloyd

•LR/U.K

Lloyd's Register of Shipping

•ABS/U.S.A

American Bureau of Shipping

•BV/FRANCE

Bureau Veritas

•NK/JAPAN

Nippon Kaiji Kyokai

 CB type test •DEKRA

Formerly KEMA Quality Registered

•KERI

Korea Electrotechnology Research Institute

U-Series Air Circuit Breaker_ 5

U-Series


Features | Various accessories |

[ Body side ]

❶

❷

❸

❹

❺

❻

❼

❽

❾

❿























❶ Motor ❷ Closing coil ❸ Trip coil ❹ Double trip coil ❺ Trip supervision coil ❻ Under voltage trip coil

6

❼ Auxiliary switch ❽ Condenser trip device ❾ Lifting lug ❿ Mechanical interlock kit  Phase insulation barrier  ON/OFF button cover



 OCR portable checker  Key lock device  Wrong insertion preventer  Fixing block  Counter O CR & Alarm switch reset device



 Test jumper  Draw-in/out handle  Draw-in/out and

position lock device  Door flange  Dust cover

ACB

[ Cradle side ]

❶

❷

❸

❹

❺

❻

❼

❽

❾

❿





❶ UVT time delay controller ❷ Remote operation module ❸ Temperature detection module ❹ Short “b”contact ❺ Position switch

❻ Mechanical interlock kit ❼ Phase insulation barrier ❽ Mechanical operated cell (MOC) switch ❾ Dummy ACB ❿ Wrong insertion preventer



 Safety shutter  Arc shield  Control terminal protection cover


U-Series


Features | High performance protection trip relay (OCR) | •The protection trip relay (OCR) of U-Series ACB supports stable power supply with temperature alarm, fault recording, and others in addition to main protection functions. Type

UPR-1L-GL

UPR-2L-GS

UPR-1D-GT

UPR-2L-GM

Ordering 50Hz code 60Hz

33

35

36

37

43

45

46

47

•L/S/I/G •Self-power •Failsafe •Pre-trip alarm •Integrated instantaneous output contact

•L/S/I/G •Self-power •AC, DC100-250V •Failsafe •Pre-trip alarm •Individual continuous output contact •Fault event •Temperature alarm

Externals

Main function

8

•L/S/I/G •Self-power •AC, DC100-250V •Failsafe •Pre-trip alarm •Individual output contact •Fault event •Temperature alarm •Earth leakage trip •Communication (Modbus)

•L/S/I/G •Self-power •AC, DC100-250V •Failsafe •Pre-trip alarm •Individual output contact •Fault event •Temperature alarm

ACB

| Multiple terminal busbar connections | •Increases the user's convenience by diversified terminal connection methods according to busbar's type. •Simply turn a horizontal connector 90˚ to make it a vertical connector (The opposite case is same).  Standard connection

Vertical

Horizontal

Front

Vertical/Horizontal

Horizontal/Vertical

Vertical/Front

Horizontal/Front

Front/Vertical

Front/Horizontal

 Mixed connection (Top/Bottom)

※ - Changing connector is available only for UAN/UAS A frame 630-1,600A, UAN/UAS B frame 2,000-3,200A. - Front connection type is suitable the panel requirement for limited installation space. - Changing connection above 4,000A needs additional component, please contact us. U-Series Air Circuit Breaker_ 9

U-Series


Features | Easy-to-install |  Fixed type •Installed in a switchboard directly.  Draw-out type •Consists of ACB and cradle. •Cradle is fixed to a switchboard. •ACB may be in the position of CONNECTED, TEST, ISOLATED, and REMOVED. •Switchboard door may be closed in ISOLATED position.

[ Draw-in/out guide rail ]

접속위치(Connected Position) Connected position

- Main and control circuit are all connected. - Normal condition of use

Isolated position

- Main and control circuit are all isolated. - Switchboard door may be closed in isolated position.

10

Test position

- Main circuit is isolated, control circuit is connected. - Control test is possible when switchboard’s door is closed.

Removed position

- ACB is totally drawn out from the cradle.

ACB

Structure | Externals | [ Front ] ❶

❶



❷ 

❸



❹ ❺



❻ 

❷   ❸



❹ ❺



❻ ❼ ❽ ❾ ❿

[ Fixed type ]

 

[ Draw-out type ]

[ Cradle ]





[ Inside ]

❶ Control terminal ❷ Front cover ❸ Close/Open indicator ❹ Close button ❺ Protection trip relay (OCR) ❻ Open button

[ Rear ]

❼ Position lock device ❽ Position lock release button ❾ Draw-in/out handle insertion hole ❿ Position indicator  Counter  Charged/Discharged indicator

 Manual charging handle  Name plate  Arc shield  Terminal busbar  OCR & Alarm switch reset button  Draw-in/out guide rail


U-Series


Structure | Internals |

❶ ❷ ❸ ❹ ❺

❻ ❼ ❽ ❾

❿



 ❶



 ❻



❹  



❽



❾ 







❿

❶ Arc chamber ❷ Frame ❸ Counter ❹ Auxiliary switch ❺ Motor ❻ Closing/Trip/UVT coil

12

❼ MHT device ❽ Protection trip telay (OCR) ❾ Mechanism ❿ Draw-in/out device  Front cover  Control terminal protection cover

 Control terminal  Manual charging handle  Closing spring  Moving contact  Fixed contact T erminal busbar

 Current transformer  Terminal clip  Cradle

ACB

Ratings Frame

A frame

B frame

06 : 630 08 : 800 10 : 1,000 12 : 1,250 16 : 1,600 20 : 2,000

06 : 630 08 : 800 10 : 1,000 12 : 1,250 16 : 1,600 20 : 2,000 25 : 2,500 32 : 3,200 40 : 4,000

Model

Rated operating voltage (Ue) (V) Rated insulation voltage (Ui) (V) Frequency (Hz) Number of poles Current setting range (….. x In max) Rated current of neutral pole (…..% x In)

UAS 20 : 2,000 25 : 2,500 32 : 3,200

20,000

10,000

20,000

15,000

2,000

2,000

30,000

20,000

Without maintenance

5,000

06-20 : 10,000 25-40 : 5,000

2,000

5,000

5,000

With maintenance

10,000

06-20 : 15,000 25-40 : 10,000

5,000

10,000

10,000

65 85 85 143 187 187 65 60 50

Electrical

AC 690 AC 1,000 50/60 3, 4 0.4-1.0 100% 85 100 100

55 65 65

187 220 220 85 75 65

121 143 143 55 45 36

70 85 85 100% 154 187 187 70 65 55 12 40 10 40

Draw-out type

63

06-32 : 87 40 : 107

145

63

87

Fixed type

34

06-32 : 44 40 : 61

76

34

44

Draw-out type

280

06-32 : 130 40 : 61

173

74

103

Fixed type

44

06-32 : 55 40 : 81

81

44

55 399 x 460 x 368

3 pole Weight (kg) 4 pole

4 pole

06 : 630 08 : 800 10 : 1,000 12 : 1,250 16 : 1,600

30,000

IEC 60947-2 AC 690/600/550V category “B” AC 500/480/460V KS C 4620 AC 415/380/230/220V Rated service breaking capacity (…..% x Icu) Rated making capacity IEC 60947-2 AC 690/600/550V (Icm) category “B” AC 500/480/460V (kA peak) KS C 4620 AC 415/380/230/220V 1 sec Rated short-time capacity (Icw) 2 sec (kA, without Inst.) 3 sec Rated impulse withstand voltage (Uimp) (kV) Maximum total breaking time (ms) Motor charging time (sec) max. Closing operating time Closing time (ms) max. Without maintenance Mechanical With maintenance

3 pole

32 : 3,200 40 : 4,000 50 : 5,000

B frame

AC 690 AC 1,000 50/60 3, 4 0.4-1.0 100% 85 100 100 100% 187 220 220 85 75 65 12 40 10 40 15,000

Rated breaking capacity (Icu) (kA sym)

External dimension (mm) (WxHxD, except busbar)

A frame

UAN

Recognition order code: Rated current (In max at 40˚C) (A)

Life cycle (times)

C frame

Draw-out type Fixed type Draw-out type Fixed type

399 x 460 x 368

624 x 460 x 368

328 x 460 x 368

337 x 404 x 296

408 x 404 x 296

633 x 404 x 296

337 x 404 x 296

408 x 404 x 296

413 x 460 x 368

514 x 460 x 368

794 x 460 x 368

413 x 460 x 368

514 x 460 x 368

422 x 404 x 296

523 x 404 x 296

803 x 404 x 296

422 x 404 x 296

523 x 404 x 296

Draw-out type

H

H

Fixed type

328 x 460 x 368

W

D

W

D


U-Series


Protection Trip Relay (OCR) | Overview |

❶ LCD display window ❷ Fault indication LED

❷ PTA: Pre-trip alarm LTD: Long time delay

❶

❺

❸

STD/INST: Short time or instantaneous tripping GFT/ELT: Ground fault trip or earth-leakage trip TAL: Temperature alarm

❸ Overload indication LED ❹ Function key

❹

❽ ❻

❼ ❾

 ❿

 



14

Reset: Fault reset Hi/Low: Field test function (Hi: STD/INST, Low: LTD) Move List: Secondary menu Enter: Setting input

❺ Phase indication Iine ❻ Ir: Long time current setting knob

Tr: Long time tripping delay setting knob ❼ Isd: Short time current setting knob Tsd: Short time tripping delay setting knob ❽ Ii: Instantaneous current setting knob ❾ GFT/STD, MCR setting knob ❿ Ip: Pre-trip alarm current setting knob Tp: Pre-trip alarm delay setting knob  Ig: Ground fault current setting knob Tg: Ground fault tripping delay setting knob  Rated current setting knob  Test jack  Earth leakage pick-up and tripping delay setting knob

ACB

General feeder

Application

Generator

UPR-1L-GL

UPR-2L-GS

UPR-1D-GT

UPR-2L-GM

UPR-1S-AL

UPR-2S-AS

Control power Self power Long time delay (LTD) Short time delay (STD) Instantaneous trip (INST) Pre trip alarm Ground fault trip Field test Failsafe True RMS detection Fault indication LED Overload indication LED Display window

       -

            

            

            

      -

           

Integrated instantaneous contact (1a)



-

-

 PTA: 1a L/S/I/G: 2a



-

Individual continuous contact (4a)

-





 PTA: 1a L/S/I/G: 2a

-

MCR Temperature detection Event/Fault recording Earth leakage trip (ELT) Communication

 -

  -

    

  -

 -

Externals

Power supply

Protection

Indication

Output contact

Optional function ※ : Standard

 LTD: 1a S/I: 1a PTA:1a    -

: Option

O rdering codes Model UPR-1L-GL UPR-2L-GS UPR-1D-GT UPR-2L-GM UPR-1S-AL UPR-2S-AS UPR-1L-GL UPR-2L-GS UPR-1D-GT UPR-2L-GM UPR-1S-AL UPR-2S-AS

Ordering codes Frequency Complete parts Spare part of ACB/Cradle

50Hz

60Hz

33 35 36 37 38 39 43 45 46 47 48 49

UANS OCR33A/33J UANS OCR35A/35J UANS OCR36A/36J UANS OCR37A/37J UANS OCR38A/38J UANS OCR39A/39J UANS OCR43A/43J UANS OCR45A/45J UANS OCR46A/46J UANS OCR47A/47J UANS OCR48A/48J UANS OCR49A/49J

Application Specifications for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type for auto connection/manual connection type

UAN UAS            

Mounting position

      

Inside of ACB body

   U-Series Air Circuit Breaker_ 15

U-Series


Protection Trip Relay (OCR) | UPR-1L-GL | •Overload protection - Long time delay

•Short circuit protection - Short time delay, instantaneous trip - I2t on/off optional (for STD)

•Ground fault protection - I2t on/off optional

•Self power •1a DO (Digital output)

Characteristic Ir: Long time current setting tr: Long time tripping delay setting

Ir

Isd: Short time current setting

tr

tsd: Short time tripping delay setting Ii: Instantaneous current setting

Isd

Ig I2t on tg

Ig: Ground fault current setting

tsd Ii

I2t off

I2t off

tg: Ground fault tripping delay setting

I2t on

 Protection Current setting (Ir) Long time

Time delay (tr) Accuracy: ±15% or below 100ms Current setting (Isd)

Short time

Instantaneous

Time delay (tsd) at 10×Ir Accuracy: ±20% Current setting (Ii) Trip time

In = Ict×…

(A)

0.5

0.63

0.7

0.8

0.9

1

Ir = In×…

(A)

0.8

0.83

0.85

0.88

0.9

0.93

0.95

0.98

1

Non

(sec) 10.4 (sec) 0.5 (sec) 0.35

26.1

41.7

52

104

208

312

417

521

626

1.25 0.86

2 1.38

2.5 1.73

5 3.45

10 6.9

15 10.4

20 13.8

25 17.3

30 20.7

1.5 0.1

2 0.2

2.5 0.3

3 0.4

4 0.5

6

8

10

Non

tr at (1.5×Ir) tr at (6.0×Ir) tr at (7.2×Ir) Isd = In×… tsd

I2t off I2t on

Min. trip time (msec) (I2t off) Max. trip time (msec) Ii = In×… (A)

16

Time delay (tg) at 1×In Accuracy: ±20%

0.1

0.2

0.3

0.4

0.5

20 80

80 140

160 240

260 340

360 440

460 540

2

3

4

6

8

10

12

15

Non

0.7

0.8

1

below 50ms

Pick-up (Ig) Accuracy: ±15% (Ig＞0.4In) Ig = Ict×… ±20% (Ig≤0.4In) Ground fault

1 (A) (sec) 0.05 (sec) 0.05

tg (I2t off)

I2t off I2t on

0.1

0.2

0.3

0.4

0.5

0.6

(sec) 0.05 (sec) 0.05

0.1

0.2

0.3

0.4

0.5

0.1

0.2

0.3

0.4

0.5

(A)

Min. trip time (msec)

20

80

160

260

360

460

Max. trip time (msec)

80

140

240

340

440

540

Non

ACB

| UPR-2L-GS, UPR-2L-GM | •Overload protection

•Event recording

- Long time delay

- Short time delay, instantaneous trip - I2t on/off optional (for STD)


•Pre-trip alarm - Prevent unnecessary over load trip according to rated current (In)

•Ground fault protection

•Field test

- I2t on/off optional

•Realization of protective coordination by ZSI (Zone selective interlocking)

- Simulation of long time, short time, instantaneous delay

•4a(3a) DO (Digital output) - 4a (UPR-2L-GS) - 3a (UPR-2L-GM)

•Fault recording - Records max. up to 10 fault information about fault type, fault phase, fault valve, occurrence time of fault


Ir IP


tr


Tp

I2t off

tg: Ground fault tripping delay setting

I2t on

Isd

Ig I2t on tg

Ig: Ground fault current setting

tsd

tp: Pre-trip alarm delay setting

Ii

I2t off

Ip: Pre-trip alarm current setting



Short time

Instantaneous

Time delay (tsd) at 10×Ir Accuracy: ±15% Current setting (Ii) Trip time Pick-up (Ig)

Ground fault

Time delay (tg) at 1×In Accuracy: ±15% (Ig＞0.4In) ±20% (Ig≤0.4In)

Current setting (Ip) Pre trip alarm Accuracy: ±15% Time delay (tp)

In = Ict×…

(A)

0.5

0.63

0.7

0.8

0.9

1

Ir = In×…

(A)

0.8

0.83

0.85

0.88

0.9

0.93

0.95

0.98

1

Non

(sec) 10.4 (sec) 0.5 (sec) 0.35

26.1

41.7

52

104

208

312

417

521

626

1.25 0.86

2 1.38

2.5 1.73

5 3.45

10 6.9

15 10.4

20 13.8

25 17.3

30 20.7

1.5 0.1

2 0.2

2.5 0.3

3 0.4

4 0.5

6

8

10

Non

tr at (1.5×Ir) tr at (6.0×Ir) tr at (7.2×Ir) Isd = In×… tsd

I2t off I2t on

1 (A) (sec) 0.05 (sec) 0.05

Min. trip time (msec) (I2t off) Max. trip time (msec) (A) Ii = In×…

0.1

0.2

0.3

0.4

0.5

20 80

80 140

160 240

260 340

360 440

460 540

2

3

4

6

8

10

12

15

Non

0.3 0.2

0.4 0.3

0.5 0.4

0.6 0.5

0.7

0.8

1

Non

Non

below 50ms In = Ict×… I2t off tg I2t on

0.1 (sec) 0.05 (sec) 0.05

0.2 0.1 0.1

0.2

0.3

0.4

0.5

Min. trip time (msec) (I2t off) Max. trip time (msec)

20 80

80 140

160 240

260 340

360 440

460 540

Ip = In×…

0.6

0.65

0.7

0.75

0.8

0.85

0.9

0.95

1

5

10

15

20

40

60

80

120

160

tp

(A) (sec)


U-Series


Protection Trip Relay (OCR) | UPR-1D-GT | •Overload protection

•Event recording

- Long time delay

- Records events of device related to setting change, operation and state change (Max. up to 10)


•Pre trip alarm - Prevent unnecessary over load trip according to rated current (In)

•Ground fault protection - I t on/off optional 2


•Field test

•Fault recording

•4a DO (Digital output)

-R ecords max. up to 10 fault information about fault type, fault phase, fault valve, occurrence time of fault

- Simulation of long time, short time, instantaneous delay

•Communication: Modbus-RTU/RS-485 •Earth leakage trip (Optional)

Characteristic Ir: Long time current setting

Ir IP

tr: Long time tripping delay setting Isd: Short time current setting

tr

tsd: Short time tripping delay setting

Tp

Ii: Instantaneous current setting

Isd

Ig I2t on tg I2t off

I2t on tsd


Ii

I2t off

tg: Ground fault tripping delay setting Ig: Ground fault current setting Ip: Pre-trip alarm current setting



Short time

Instantaneous

Ground fault

Time delay (tsd) at 10×Ir Accuracy: ±15% Current setting (Ii) Trip time Pick-up (Ig) Time delay (tg) at 1×In Accuracy: ±15%(Ig＞0.4In) ±20%(Ig≤0.4In)

Current setting (Ip) Pre trip alarm Time delay (Tp) Accuracy: ±15% Current setting (IΔn) Earth leakage Time delay (Δt) (optional) Accuracy: ±15% or below 40ms

18

In = Ict×… Ir = In×… tr at (1.5×Ir) tr at (6.0×Ir) tr at (7.2×Ir) Isd = In×…

(A) (A) (sec) (sec) (sec) (A) (sec) I2t off tsd (sec) I2t on Min. trip time (msec) 2 (I t off) Max. trip time (msec) Ii = In×… (A) Ig = Ict×… I2t off (sec) tg (sec) I2t on Min. trip time (msec) 2 (I t off) Max. trip time (msec) Ip = In×… (A) tp

(sec)

IΔn Δt

Alarm time Trip time

(A) (msec) (msec)

0.5 0.63 0.8 0.83 10.4 26.1 0.5 1.25 0.35 0.86 1 1.5 0.05 0.1 0.05 0.1 20 80 80 140 2 3 below 50ms 0.1 0.2 0.05 0.1 0.05 0.1 20 80 80 140 0.6 0.65

0.7 0.85 41.7 2 1.38 2 0.2 0.2 160 240 4

0.8 0.88 52 2.5 1.73 2.5 0.3 0.3 260 340 6

0.9 0.9 104 5 3.45 3 0.4 0.4 360 440 8

1 0.93 208 10 6.9 4 0.5 0.5 460 540 10

0.3 0.2 0.2 160 240 0.7

0.4 0.3 0.3 260 340 0.75

0.5 0.4 0.4 360 440 0.8

0.95 312 15 10.4 6

0.98 417 20 13.8 8

1 521 25 17.3 10

12

15

Non

0.6 0.5 0.5 460 540 0.85

0.7

0.8

1

Non

0.9

0.95

1

Non

5

10

15

20

40

60

80

120

160

0.5 140 60

1 230 140

2 350 230

3 800 350

5 950 800

10 80

20 120

30 160

Non

Non 626 30 20.7 Non

ACB

| UPR-1S-AL | •Overload protection - Long time delay


•Ground fault protection - I2t on/off optional (for STD)

•Self power •1a DO (Digital output)


Ir


tr


I2t on

Isd

tsd Ii

I2t off



Short time

Instantaneous


In = Ict×… Ir = In×…

(A)

1.1

1.15

1.2

1.25

50

60

70

80

100

120

(sec) 10 (sec) 0.99

15 1.49

20 1.99

25 2.48

30 2.98

35 3.48

40 3.97

50 4.97

60 5.96

1 (A) (sec) 0.05 (sec) 0.05

1.5 0.1

2 0.2

2.5 0.3

3 0.4

3.5 0.5

4

4.5

5

12

15

Non

(sec)

tr at (1.2×Ir) tr at (3×Ir) Isd = In×… tsd

I2t on

20

40

tr at (1.05×Ir)

I2t off

(0.5-1.0) x1% unit, or 1A unit 0.7 0.8 0.9 1 1.05 30

(A)


0.1

0.2

0.3

0.4

0.5

20 80

80 140

160 240

260 340

360 440

460 540

2

3

4

6

8

10

Non

Non

below 50ms


U-Series


Protection Trip Relay (OCR) | UPR-2S-AS | •Overload protection

•Event recording

- Long time delay

- Records events of device related to setting change, operation and state change (Max. up to 10)



•Pre trip alarm - Prevent unnecessary over load trip according to rated current (In)

•Field test - Simulation of long time, short time, instantaneous delay

•Fault recording -R ecords max. up to 10 fault information about fault type, fault phase, fault valve, occurrence time of fault

•3a DO (Digital output)


Ir IP


tr


Tp Isd


I2t on

Ip: Pre-trip alarm current setting

tsd Ii

I2t off



Short time

Instantaneous

Ground fault

20


In = Ict×… Ir = In×…

(A)

1.1

1.15

1.2

1.25

50

60

70

80

100

120

(sec) 10 (sec) 0.99

15 1.49

20 1.99

25 2.48

30 2.98

35 3.48

40 3.97

50 4.97

60 5.96

1 (A) (sec) 0.05 (sec) 0.05

1.5 0.1

2 0.2

2.5 0.3

3 0.4

3.5 0.5

4

4.5

5

(sec)

tr at (1.2×Ir) tr at (3×Ir) Isd = In×… tsd

I2t on

20

40

tr at (1.05×Ir)

I2t off

(0.5-1.0) x1% unit, or 1A unit 0.7 0.8 0.9 1 1.05 30

(A)


0.1

0.2

0.3

0.4

0.5

20 80

80 140

160 240

260 340

360 440

460 540

2

3

4

6

8

10

12

15

Non

Non

Non

below 50ms

Current setting (Ip)

Ip = In×…

Time delay (Tp) Accuracy: ±15%

tp

(A) (sec)

0.7

0.75

0.8

0.85

0.9

0.95

1

1.05

1.1

1

5

10

15

20

25

30

35

40

Non

ACB

| Operation characteristics | 

Long time delay (LTD)

t Ir tr



t Ir

I

tr

t t Ig

Ir



Short time delay (STD) tr

I I2t on I2t off

Isd Tsd

I I I2t on t t

Time delay setting

Ig2t on •L type - Standard operating time (sec) is based the time of 600%×[Ir] with inverse time operation. Ig2on t off - Setting range: 0.5, 1.25,Ig2, 2.5, 5, 10, 15, 20, 25, 30sec (10 modes) - The breaker is tripped t at ±15% of setting time. Tg •S type I - Standard operating time (sec) is based on the time of 120%×[Ir] with inverse time operation. - Setting range: 10, 15, 20, 25, 30, 35, 40, 50, 60sec (9 modes) - The breaker is tripped at ±15% of setting Ig2t ontime.

t t

t

Standard current setting

•L type - The scale is marked as magnification of [In]. - Setting range: (Non, 0.8, 0.83, 0.85, 0.88, 0.9, 0.93, 0.95, 0.98, 1.0)×In (10 modes) - No protection in case of non setting of [Ir]. - The breaker is not tripped below 105% of [Ir], and tripped at 120%. •S type t - Setting range: (Non, 0.7, 0.8, 0.9, 1.0, 1.05, 1.1, 1.15, 1.2, 1.25 )×In (8 modes) - The breaker is tripped above 100% of [Ir].

Isd Tsd

I2t off

I I2t on Isd Tsd

Ig2t off


•L type Tg - The scale is marked as magnification of [In]. I Ig2t on - Setting range: (Non, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 10)×In (10 modes) •S type Ig2t off I∆ n Ig - The scale is marked as magnification of [In]. - Setting range: (Non, t 1, 1.5,T2,g 2.5, 3, 3.5, 4, 4.5, 5)×In (10 modes) ∆T I I  Time delay setting •L type - Standard operating time (msec) is based on the time of 120%×[Isd] with definite time operation. - Setting range: 50, 100, 200, 300, 400, 500msec (6 modes) t curveI∆applied - 1000% of inverse time in case of inverse time (I2t on) setting. n •S type t - Standard operating time (msec) is based on the time of 120%×[Isd] with definite time operation. ∆T - The range of set time is 50, 100, 200, 300, 400, 500msec (6 step). I - 500% of inverse time curve applied in case of inverse time (I2t on) setting.

I2t off

I∆ n

Instantaneous trip (INST) t



Ii I

Tp(S type)

Ip

Standard current setting ∆T

t as magnification of [In]. I - The scale is marked Tp - Setting range: (Non, 2, 3, 4, 6, 8, 10, 12, 15)×In (9I modes) - No protection in case of non setting of [Ii].

I 

Time delay setting Tp(S type) - Total breaking time is below 50ms. t Ip

t Ii

Tp I

I Tp(S type) Ip

Ii

Tp I

I


U-Series


Protection Trip Relay (OCR) | Operation characteristics | 

Ground fault trip (GFT)



Time delay setting

•L type - Standard operating time (msec) is based on the time of 120%×[Ig] with definite time operation. - Setting range: 50, 100, 200, 300, 400, 500msec (6 modes) - Inverse time operated with 100% of [Ict] standard in case of [I2t on] setting. - The breaker is tripped at ±15% of setting time.

t

Ig2t on Ig2t off

Ig t


•L type - The scale is marked as magnification of OCR rated primary current [ICT]. - Setting range: (Non, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 1.0)×[ICT] (10 modes)

Tg I Ig2t on Ig2t off

tt Ig



Earth leakage trip (ELT) Ig2t on Ig2t off



I

Ig t

I∆ n


•L type - The scale is marked as magnification of OCR rated primary current [ZCT]. - Setting range: (Non, 0.5, 1, 2, 3, 5, 10, 20, 30[A]) (9 modes)

Tg

T∆T g

II

Time delay setting

•L type - Settings within its alarm range will prevent its breaker from tripping but activating its alarm. - Trip time: 60, 140, 230, 350, 800msec (5 modes) - Alarm time: 140, 230, 350, 800, 950msec (5 modes)

I∆ n

t t

∆T

I

I∆ n Tp(S type) Ip ∆T tPre-trip alarm (PTA) I Tp I

Tp(S type) t Ip

I Tp(S type) Ip Tp I


•L type - The scale is marked as magnification of [In] with definite time operation. - Setting range: (Non, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0)×In (10 modes) •S type - The scale is marked as magnification of [In] with inverse time operation. - Setting range: (Non, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.05, 1.1)×In (10 modes) 

Tp

22



Time delay setting

•L type - Standard operating time (sec) is based on the time of 100%×[Ip]. - Setting range: 5, 10, 15, 20, 40, 60, 80, 120, 160, 200sec (10 modes) •S Type - Standard operating time (sec) is based on the time of 120%×[Ip]. - Setting range: 1, 5, 10, 15, 20, 25, 30, 35, 40sec (9 modes)

ACB

| Circuit diagrams | UPR-1L-GL NCT k ℓ T

S

R

R

S

T

21

29 30

N L/S I/G

NCT NCT 1 2

UPR-1L-GL

CT3

Rn Sn Tn Nn Ac

A

C TN T P TP

CT2

MHT

CT1

TN

1a for MCR Rn

Sn

22

Tn

UPR-2L-GS AC,DC100-250V

S0 - S2 Source

NCT k ℓ S

R

T

R

S

T

N

+

21 23

29 30

19

L PT

NCT NCT 1 2

S2

-

UPR-2L-GS

CT3

Rn Sn Tn Nn Ac S/I G/E ZI 1

ZI 2

ZO ZO 2 1

A

C TN TP S 0 TP

CT2

MHT

CT1

TN

1a for MCR Rn

Sn

Tn

22 24 26 31 32 33 34 +

In

ZSI

20

+ Out


U-Series


Protection Trip Relay (OCR) | Circuit diagrams | UPR-1D-GT AC,DC100-250V

S0 - S2 Source

ZCT NCT k ℓ k ℓ T

S

R

21 23

R

S

T

N

L P/T

+

-

27 28 29 30

19

ELT ELT NCT NCT 2 1 2 1

S2

UPR-1D-GT

CT3

ZI ZO 2 1

Rn Sn Tn Nn Ac S/I G/E ZI 1

ZO COM COM 2

A

C TN TP S 0 TP

CT2

MHT

CT1

TN

1a for MCR Rn

Sn

20

22 24 26 31 32 33 34 35 36

Tn

+

In

ZSI

+ - + Out Communication

UPR-2L-GM AC,DC100-250V

S0 - S2 Source

NCT k ℓ S

R

T

R

S

T

+

21 23

29 30

19

N L/S PT I/G

NCT NCT 1 2

S2

UPR-2L-GM

CT3

ZI Rn Sn Tn Nn Ac1 Ac2 L/S I/G 1

ZI 2

ZO ZO 2 1

A

C TN TP S 0 TP

CT2

MHT

CT1

TN

1a for MCR Rn

Sn

Tn

22 24 26 31 32 33 34 +

24

In

ZSI

+ Out

20

-

ACB

UPR-1S-AL

T

S

R

21

R

S

T

L/ N SI

UPR-1S-AL

CT3

Rn Sn Tn Nn Ac

A

C TN T P TP

CT2

MHT

CT1 TN

1a for MCR Rn

Sn

22

Tn

UPR-2S-AS AC,DC100-250V

S 0 - S2 Source +

S

R

T

R

S

T

N

21 23

19

L PT

S2

-

UPR-2S-AS

CT3

Rn Sn Tn Nn Ac S/I ZI 1

ZI 2

ZO ZO 1 2

A

C TN TP S 0 TP

CT2

MHT

CT1

TN

1a for MCR Rn

Sn

Tn

22 24 31 32 33 34 +

In

ZSI

20

+ Out


U-Series


Protection Trip Relay (OCR) | Characteristic curves |

Hour

General feeder

4 3

❶

❹

2 1 50 40 30

❺ ❷

Minute

20 10 8 6 5 4 3

❸

2

Operating time

1 50 40 30 20 10 8 6 5 4 3

Second

2 1 0.8 0.6 0.5 0.4 0.3

500ms

500ms

50ms

50ms

0.2 0.1 0.08 0.06 0.0 0.05 0.04 0.03 0.02

Percent for rated primary current of OCR [ICT]

❶ Long time delay current setting range ❷ Short time delay current setting range

26

2500 3000

2000

1500

600 700 800 900 1000

500

400

250 300

200

150

125

60 70 80 90 100

50 60 70 80 90 100

40

30

20

15

7 8 9 10

0.01 0.008 0.006 0.005

Percent for base current of OCR [Io]

❸ Instantaneous tripping current setting range ❹ Ground fault trip current setting range

❺ Pre-trip alarm current setting range

ACB

Hour

Generator

❶

4 3 2 1 50 40 30

❹

Minute

20 10 8 6 5 4 3

❷

2

Operating time

1 50 40 30

❸

20 10 8 6 5 4 3

Second

2 1 0.8 0.6 0.5 0.4 0.3

500ms

0.2 0.1 0.08 0.06 0.05 0.0 0.04 0.03

50ms

0.02

2500 3000

2000

1500

600 700 800 900 1000

500

400

250 300

200

150

125

50 60 70 80 90 100

40

30

20

15

7 8 9 10

0.01 0.008 0.006 0.005

Percent for base current of OCR [Io]

❶ Long time delay current setting range ❷ Short time delay current setting range

❸ Instantaneous tripping current setting range ❹ Pre-trip alarm current setting range


U-Series


Protection Trip Relay (OCR) | Zone selective interlock function | Zone selective interlocking drops delay time that eliminates faults for breakers. It minimizes the shock that all kinds of electric machinery get under fault conditions.

 Example  In case of that short time-delay or ground fault accident occurs at ZSI built in system, the breaker at accident site sends ZSI signal to halt upstream breaker’s operation.  To eliminate a breakdown, trip relay of ACB at accident site activates trip operation without time delay.  The upstream breaker that received ZSI signal adhere to pre-set short time-delay or ground fault time delay for protective coordination in the system. However upstream breaker that did not receive its signal will trip instantaneously.  For ordinary ZSI operation, it should arrange operation time accordingly so that downstream circuit breakers will react before upstream ones under overcurrent/short time delay/ground fault situations.  ZSI connecting line needs to be maximum 3m.

ACB 1 Out

Zone 1

In

ACB 2-1

ACB 2-2 Out

Zone 2

Fault A

In

ACB 3-1

Zone 3

ZSI connecting

28

ACB 3-2

ACB 3-N

Out

Out

In

In

Fault B

Out In

ACB

| System diagram |

R

S

T

N ACB trip

ACB

Display (LCD, LED) MHT Rogowski CT

Measurement part

Trip operation

Relay selection

PTA contact

MCU processing

LTD contact External contact

STD/INST contact GFT contact

Power CT

Self power

COMMON contact

Trip relay ZSI

ZCT

110V - 220V

Earth leakage

COMM.

SMPS power

Test terminal

ZSI output + ZSI output ZSI input + ZSI input -

RS-485 + RS-485 -

| Communication function |  Modbus-RTU / RS-485

•Operation mode: Differential •Distance: Max.1.2km •Cable: RS-485 shielded twist 2-pair cable •Baud rate: 9,600, 19,200, 38,400 bps •Transmission method: Half-duplex •Termination: 150Ω

SCADA system

Modbus/RS-485


U-Series Air Circuit Breaker

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