Retrotfit Ntakl Vzrab Emri 3tx20 Sublx20 Lx20

Manual AVRname VersieNR

Retrofit diagrams

NTAKL VZRAB1S

Generator rewinding & repair. Voltage regulator products Retrotfit_NTAKL_VZRAB_EMRI 3TX20_SUBLX20_LX20_frontpage

Version : 2-1-2012 14:04:00 Page 2 of 2

Electronics

The avr VZRAB 1S Is a derative system. Through the choke / reactor excitation power ( too much ) is supplied. Under load, the CTs output add their energy to the excitation. The avr diverts the excitation power to the appropriate value. Depending upon what is defect several systems to retrofit the NTAKL excitation are listed. The Choke / reactor may be re-integrated to improve self excitation. Depending upon the value / setting of the CT, the contactor to shorten the CT during normal operation may be omitted.

Contents:

- Genuine diagram - SUBLX20 with CCC - CCC circuit - SUBLX20 QDC droopkit - SUBLX20 QDC (adaption CT) - 3TX20 stepdown, QDC, Reactor and CTs - 3TX20 stepdown, QDC, CTs - 3TX20 QDC, Reactor and CTs - LX20 tap, QDC, CTs

NISHISHIBA VZRAB 1S

Choke & CTs good condition

Isolation Value Exc. Stator JK

Use isolation step-Down transformer

No

Apply LX20/3TX20 Apply SUBLX20

ResuseChoke & CT

Apply relaisContacts &

Rectifier

CCC/QDC

For sustained Short circuit feature

Re-use Cross Current CompensationUse Quadrature Droop system

Cross Current CompensationQuadrature Droop system

Yes

Apply LX20/3TX20

No

Yes

Install Droopkit Install CCC CTs

Quadrature Droop System QDC system can be used with all other Model and brand avrs

Connection Diagram - SUBLX20Nishishiba RP-40T-4T

R. van Beekum

16-07-2010

V1.0

ENG

DATE

VERSION

1/1PAGE

Nishishiba RP-30T-4T SUBLX20.vsd

Exci

ter

Fiel

dSt

ator

Rot

orC

OM

POU

ND

SUBLX20

DIP ON

12345678

-+

P 24 VDC sourceN

A

RX (U)

CT1,2

< 8 Amp cont.

1:10

J

K

1:10

To L2 of next gen

To k2 of last gen

Connection Diagram - SUBLX20Nishishiba VZRAB

B. Lucassen

03-06-2009

V1.0

ENG

DATE

VERSION

1/1PAGE

FULL FILENAMEO:\WERKPLAATS\CD_AVR_GENERATOR\NISHISHIBA\AVR\VZRAB\RETROFIT SUBLX20 3TX20\SUBLX20\NISHISHIBA

VZRAB SUBLX20.VSD

Exci

ter

Fiel

dSt

ator

Rot

orC

OM

POU

ND

SUBLX20

DIP ON

12345678

-+

Snubber*: See operation manual subject transient peaks.

Optional to reduce transient voltage peaksConnect more in parallel to increase filter effectConnect in series to reduce individual dissipation

P 24 VDC sourceN

V2

U2

Snubber*

RX (U)

CT1,2

< 8 Amp cont.

New wires

Connection Diagram - SUBLX20Nishishiba VZRAB

B. Lucassen

03-06-2009

V1.0

ENG

DATE

VERSION

1/1PAGE

FULL FILENAMEO:\WERKPLAATS\CD_AVR_GENERATOR\NISHISHIBA\AVR\VZRAB\RETROFIT SUBLX20 3TX20\SUBLX20\NISHISHIBA

VZRAB SUBLX20.VSD

Exci

ter

Fiel

dSt

ator

Rot

orC

OM

POU

ND

SUBLX20

DIP ON

12345678

-+

Snubber*: See operation manual subject transient peaks.

Optional to reduce transient voltage peaksConnect more in parallel to increase filter effectConnect in series to reduce individual dissipation

P 24 VDC sourceN

V2

U2

Snubber*

RX (U)

CT1,2

< 8 Amp cont.

New wires

1:10

L

K

L

K

P1 S2

G1

MA

IN S

TATO

R

G1 G2

~ ~+ -

J K

EXCITER ROTOR

115V

115V

230V

170V400V

67

81

23

4

EXCITER STATOR

LXTRAF1000

SKD25/12

V2

Nishishiba VZRAB1S3TX20

GENERATOR OUTPUT, ROTATION CLOCKWISE

G2

440V / 60HzUnderspeed 55HzDroop 50%Dipswitch 1, 5 and 8 ON

External voltage adjust (when DIP5 is off)

*1)If the CTs K,L are defective they may be omitted and the NC may be omitted.*2)If the generator has sufficient residual voltage to self excite the choke and the NO contacts may be omitted.*3)If neither the CTs or the choke to build up are used, the rectifier may be omitted. The connection diagram of the avr will be according the simpliest connection diagram in the manual of the 3TX20.

on

1234

dip

5678

TSX2WVU X1

LH1- +LH2

D F I P V Vfine

3TX20

0

110

230

440

Disable cross current connection to and on other generators

+

- ~~

K1

K1

220Vdc coil

*1

*2

*3

Nishishiba VZRAB1S Generator.vsd

Emri droopkit

L

K

L

K

P1 S2

G1

MA

IN S

TATO

R

G1 G2

~ ~+ -

J K

EXCITER ROTOR

115V

115V

230V

170V400V

67

81

23

4

EXCITER STATOR

LXTRAF1000

SKD25/12

V2



G2

440V / 60HzUnderspeed 55HzDroop 50%Dipswitch 1, 5 and 8 ON


*2)If the generator has sufficient residual voltage to self excite the choke and the NO contacts may be omitted.*3)If neither the CTs or the choke to build up are used, the rectifier may be omitted. The connection diagram of the avr will be according the simpliest connection diagram in the manual of the 3TX20.

on

1234

dip

5678

TSX2WVU X1

LH1- +LH2

D F I P V Vfine

3TX20

0

110

230

440


+

- ~

~

K1

K1

220Vdc coil

*2

*3


Emri droopkit

L

K

L

K

P1 S2

G1

MA

IN S

TATO

R

G1 G2

~ ~+ -

J K

EXCITER ROTOR

EXCITER STATOR

SKD25/12

V2



G2


*1)If the CTs K,L are defective they may be omitted and the NC may be omitted.*2)If the generator has sufficient residual voltage to self excite the choke and the NO contacts may be omitted.*3)If neither the CTs or the choke to build up are used, the rectifier may be omitted. The connection diagram of the avr will be according the simpliest connection diagram in the manual of the 3TX20.

on

1234

dip

5678

TSX2WVU X1

LH1- +LH2

D F I P V Vfine

0

110

230

440


+

- ~

~

K1

K1

220Vdc coil

*1

*2

*3


Emri droopkit

choke

LX20

TSX2X1U V W

M D U I P V

DIP ON

12345678

Voltage (AC)

P stability

Underspeed

I stability

Droop

Max. out

Options

_ + LH1 LH2 LH3 LH4 EX EX

L

K

P1 S2

G1

MA

IN S

TATO

R

G1

J K

EXCITER ROTOREXCITER STATOR

V2

Nishishiba VZRAB1SLX20


G2

440V / 60HzUnderspeed 55HzDroop 50%Dipswitch 4 ON


LX20



Emri droopkit

U1 ()

~ ~+ -

SKD25/12

9Aac

NOT Exceding 150Volt

Else use step-down trafo

L

K

Documents

Retrotfit Ntakl Vzrab Emri 3tx20 Sublx20 Lx20