background image

8

    S&C Instruction Sheet 1011-510 

Ungrounded Wye Banks

Table 2. Potential device ratings.

Step 3

  Using the terminal strip illustrations, make the following connections:

A.  The station ground to TB2-1.

B.  The output terminals of the potential device, with a system voltage rating as 

shown in Table 2, to TB1-11 and TB1-12.

C.  The opening circuit of the bank switch operator, to TB2-4 and TB2-5.

D.  The closing circuit of the bank switch operator, to TB2-2 and TB2-3.

E.   The control device power source (48 - 250 Vdc, or 88 - 280 Vac, 48 - 62 Hz), to 

TB2-9 (for dc negative, ac neutral) and TB2-10 (for dc positive, ac hot).

F.   The “b” contact of the auxiliary switch on the bank switch operator to TB2-6. 

Terminal TB2-10 may be used as the source for the wetting voltage. Set this 
contact to open near the fully-closed position of the capacitor bank switching 
device.

G.   The space heater source, where applicable (120 Vac/60 Hz or 240 Vac/60 Hz).

H.   Alarm circuit (optional).

I.   If unbalance compensation is required, connect the output terminal(s) of the 

one (three) S&C 30-Volt-Ampere Potential Device(s) to TB1-9, TB1-10, DB2-11, 
and TB2-12 (phase voltage return).

Step 4

  If necessary, connect the potential devices or voltage transformers used for 

unbalance compensation.

If the BankGuard Plus Control uses the optional unbalance compensation feature, 
you must also connect the output terminals of other voltage monitoring devices:

A. 

To detect and compensate for the inherent capacitor bank imbalance only, in 
applications where the source is grounded

, connect to one of the following:

• 

A single S&C 30-Volt-Ampere Potential Device rated for full system voltage, 
connected to any phase of the station bus from which the capacitor bank 
is tapped.

• 

A single voltage transformer, connected to the station bus from which the 
capacitor bank is tapped—either phase-to-phase across any two phases, or 
phase-to-ground on any phase.

B. 

To detect and compensate for the inherent capacitor bank imbalance only, in 
applications here the source is a delta-connected tertiary transformer wind-
ing,

 you must connect to a 1:1 voltage transformer, which is then connected to 

Nominal Source

Voltage (kV)

Potential Device System 
Voltage Rating (kV, Nominal)

below 23

23

23

23

34.5

23

46

23

69

34.5

115

69

138

69

161

138

230

138

Содержание BankGuard PLUS

Страница 1: ...tion Checklist 4 In Shop Setup 4 Ungrounded Wye Banks Installation 5 Test the Control 10 Grounded Wye Banks Installation 11 Test the Control 13 Ungrounded Wye Shunt Reactors Installation 14 Test the C...

Страница 2: ...nkGuard Plus Designate a location where you can easily retrieve and refer to this publication Warranty SPECIAL WARRANTY PROVISIONS The standard warranty contained in seller s standard conditions of sa...

Страница 3: ...OTICE identifies important procedures or requirements that can result in product or property damage if instructions are not followed Following Safety Instructions If you do not understand any portion...

Страница 4: ...e problems that can occur uring installation NOTE Although it is possible use the faceplate buttons and LCD for the initial setup of the control using the IntelliLink software makes the process faster...

Страница 5: ...rds that may be involved This document is written only for such qualified persons and is not a substitute for adequate training and experience in safety procedures for accessing high voltage equipment...

Страница 6: ...BankGuard Plus Control includes numbered terminal strips on the back of the enclosure for external control wiring connections See Figure 1 Table 1 and the electrical diagrams at the end of this instru...

Страница 7: ...B1 11 Star voltage TB1 12 Star voltage return TB2 A 2nd Lockout O O O C TB2 B 2nd Lockout O O O C TB2 1 Chassis ground TB2 2 Lockout C C C O TB2 3 Lockout C C C O TB2 4 Lockout O O O C TB2 5 Lockout O...

Страница 8: ...C 30 Volt Ampere Potential Device s to TB1 9 TB1 10 DB2 11 and TB2 12 phase voltage return Step 4 If necessary connect the potential devices or voltage transformers used for unbalance compensation If...

Страница 9: ...e to ground voltage relationships for all but fault conditions The circuits connecting the potential devices voltage transformers to the BankGuard Plus Control must be free of variable loads variable...

Страница 10: ...rmation on the LCD If password protection is enabled press the NEXT button again to start scroll ing through password values If the display is blank see the Troubleshooting Instruction Sheet 1011 550...

Страница 11: ...ap point and ground should equal the number of series groups between the tap point and the line For capacitor banks with an odd number of series groups per phase the number of series groups between th...

Страница 12: ...ircuit of the bank switch operator to TB2 4 and TB2 5 D The closing circuit of the bank switch operator to TB2 2 and TB2 3 E The control device power source 48 250 Vdc 100 240 Vac 50 or 60 Hz as appro...

Страница 13: ...INDICATOR or ALARM INDICATOR LED turns ON press the corresponding RESET button to clear it B Press the ENTER button to test the faceplate LEDs All LEDs should turn ON for 2 seconds C Press the NEXT b...

Страница 14: ...hazards that may be involved This document is written only for such qualified persons and is not a substitute for adequate training and experience in safety procedures for accessing high voltage equi...

Страница 15: ...p 3 Step 3 If necessary connect the potential devices or voltage transformers used for unbalance compensation If the BankGuard Plus Control uses the optional unbalance compensation feature you must al...

Страница 16: ...This insures that the monitored voltages accurately represent the magnitude and phase angle of the bus voltages Some possible errors affecting unbalance compensation are Differences in the effective...

Страница 17: ...INDICATOR or ALARM INDICATOR LED turns ON press the corresponding RESET button to clear it B Press the ENTER button to test the faceplate LEDs All LEDs should turn ON for 2 seconds C Press the NEXT b...

Страница 18: ...BankGuard Plus installation S C Electric Company supports the BankGuard Plus Control with a variety of communi cations hardware options S C SpeedNet Radio UtiliNet Radio Cellnet Radio Microwave Data...

Страница 19: ...S C Instruction Sheet 1011 510 19 Installation and Connection Drawings...

Страница 20: ...20 S C Instruction Sheet 1011 510 Installation and Connection Drawings...

Страница 21: ...S C Instruction Sheet 1011 510 21 Installation and Connection Drawings...

Страница 22: ...22 S C Instruction Sheet 1011 510 Installation and Connection Drawings...

Страница 23: ...S C Instruction Sheet 1011 510 23 Installation and Connection Drawings...

Страница 24: ...Printed in U S A...

Отзывы: