S&C BankGuard PLUS Setup Instructions Download Page 6 | Manualshive

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1011-530

6

Figure 1.

V

o

versus

F/P

(Ungrounded Wye Capacitor Bank).

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Summary of Contents for BankGuard PLUS

Page 1: ...Wye Banks 5 Graphical Method 5 Formula Method 9 Gross Overvoltage 11 Unbalance Compensation 12 GROUNDED WYE BANKS 15 Graphical Method 16 Formula Method 19 Gross Overvoltage 21 Alarm Level 22 UNGROUND...

Page 2: ...he equipment covered by this publication must be installed operated and main tained by qualified persons who are knowledgeable in the installation operation and maintenance of overhead electric power...

Page 3: ...damaged or faded labels on the equipment be replaced immediately Replacement labels are available by contacting your nearest S C Sales Office S C Headquarters or S C Electric Canada Ltd DANGER DANGER...

Page 4: ...1011 530 4...

Page 5: ...te rating of the capacitor units Vo Voltage applied to surviving capacitor units per unit of capacitor unit normal volt age Vn Capacitor bank neutral to ground voltage per unit of line to neutral volt...

Page 6: ...1011 530 6 Figure 1 Vo versus F P Ungrounded Wye Capacitor Bank...

Page 7: ...t 10 on the horizontal scale 1 10 10 of capacitor units isolated from a series group Follow this up to the curve for S 2 2 series groups per phase Here on the vertical scale Vo 1 072 per unit Similarl...

Page 8: ...series group P 12 For F 1 enter at 8 33 on the horizontal scale 1 12 8 33 of capacitor units isolated from a series group Follow this up to a point corresponding to 7 series groups per phase interpol...

Page 9: ...k A Calculate Vo for a series of steps corresponding to increasing values of F up to and including Fc using the following formulas B For each value of F used in Step A calculate Vn C Determine the des...

Page 10: ...ing profile Highest anticipated continuous system line to neutral voltage VL n 139 44 kV Nameplate rating of the capacitor units Vr 19 92 kV Number of series groups per phase S 7 Number of capacitor u...

Page 11: ...e series group The desired gross overvoltage lockout level is the midpoint between the Vn for the crit ical step and the Vn resulting from shorting out a series group For Example 1 above the Vn for th...

Page 12: ...mpared to the magnitude of the bank neutral to ground voltage resulting from isola tion of one capacitor unit For example the error voltage may be additive with respect to the neutral to ground voltag...

Page 13: ...capacitor bank imbalance of 0 01 and a per unit system voltage imbalance of 0 005 If these error voltages are additive the total error voltage could be as high as 697 2 volts This does require unbala...

Page 14: ...nit was in the process of failing In general bank lockout and the individual capacitor unit fuses will be coordinated if all of the following are true The lockout and alarm levels are set as described...

Page 15: ...The nameplate rating of the capacitor units in kV This section uses the following variable names S Number of series groups per phase P Number of capacitor units in parallel per series group VL n Highe...

Page 16: ...F up to and including Fc NOTE If the capacitor units are operating at a voltage other than the rated voltage multiply these F P values by VL n Vr B Using find the Utp for the same series of steps corr...

Page 17: ...group Follow this up to the curve for S 2 2 series groups per phase Here on the vertical scale Vo 1 053 per unit Similarly for F 2 enter the graph at 20 on the horizontal scale 2 10 20 of capaci tor...

Page 18: ...e horizontal scale 2 12 16 67 of capacitor units isolated from the same series group Follow this up to a point corre sponding to 7 series groups per phase Here Vo 1 17 per unit Because we are looking...

Page 19: ...Utp for Fc 1 For capacitor banks with an odd number of series groups per phase compute alternate values of Utp using the adjustment factor then choose a lockout level that provides the best overall r...

Page 20: ...eplate rating of the capacitor units Vr 19 92 kV Number of series groups per phase S 7 Number of capacitor units in parallel per series group P 12 For F 1 For F 2 Because we are looking for a Vo of 1...

Page 21: ...e percent imbalance Utp resulting from a fault within the capacitor bank that would short out an entire series group The desired gross overvoltage lockout level is the midpoint between the Vn for the...

Page 22: ...alf of the lower Utp For Formula Method Example 1 on page 19 the alarm setting would be For Formula Method Example 2 on page 20 the alarm setting would be Coordinating Bank Lockout and Individual Capa...

Page 23: ...ng variable names VL n Highest anticipated continuous system line to neutral voltage VL n Estimated inherent system voltage imbalance X Anticipated inherent reactor imbalance Vn Reactor neutral to gro...

Page 24: ...ror voltages will combine vec torially it is important that the magnitude of the error voltage remain low compared to the magnitude of the reactor neutral to ground voltage level for which automatic s...

Page 25: ...stops blinking and the LCD is in setup mode If you have entered an invalid password the bottom line reads Invalid Press the ESC button and then the NEXT button to retry entering the password If you p...

Page 26: ...trol device is in display mode press this button to display the unbalance compensation value presently in use by the control device Press this button a second time to calculate and display a new value...

Page 27: ...ccept the new value or ESC to cancel NOTE If you press ESC when a value is not blinking the LCD returns to display mode and reads N G Voltage UNBALANCE COMPENSATION Button LOCKOUT LEVEL Button ALARM L...

Page 28: ...Ovr Delay Gross Overvoltage Time Delay setpoint N G L Ref Ratio Neutral to Ground Ratio setpoint Ph TapPt N Ratio Phase Tap Point to Neutral Ratio setpoint InstallType Installation Type setpoint Unba...

Page 29: ...several types of software controlled products Make sure you have the correct software disks for this control device Install IntelliLINK Software To install the IntelliLINK software A If necessary turn...

Page 30: ...t while the IntelliLINK title box appears and the IntelliLINK software attempts to open communications with the control device When the IntelliLINK software establishes communications with the control...

Page 31: ...liLINK screens depend on which version of the software is installed The screen arrangements shown below apply to all IntelliLINK versions for the BankGuard PLUS control devices except where noted To C...

Page 32: ...d grounding procedures are not followed The equipment described in this document must be operated and maintained by qualified persons who are thoroughly trained and understand any hazards that may be...

Page 33: ...is control device For details see Load a Saved Configuration into a Control Device in the Operations Instruction Sheet 1011 540 1 At the IntelliLINK Operation screen click the Setup button to display...

Page 34: ...tage must exceed the Lockout Level setpoint before the control device isolates and locks out the bank or reactor The setpoint value range is from 0 2 to 30 seconds in 0 1 second increments The default...

Page 35: ...tage ratio of the potential device used to measure the line voltage for an ungrounded wye connected capacitor bank or reactor The setpoint range is 1 1 to 1200 1 The default value is 120 1 For a groun...

Page 36: ...feature will not work on the previous hardware however the Dual Redundant Alarm Contacts settings will perform as expected Dual Redundant Alarm Contacts When either of these two setpoints is selected...

Page 37: ...p Software Reset Occurs While Power Is On TB1 7 8 Trouble Alarm Open Open closed by reset Open closed by reset TB2 7 8 Trouble Alarm Closed Closed opened by reset Closed opened by reset after conditio...

Page 38: ...rd The range of passwords is 1 to 000to 9999 The default value is 0 no password enabled Alarmed at Power Up With Dual Redundant Contacts Contacts Terminals Power Is Off At Power Up No Over Voltage Pre...

Page 39: ...is value will be used to express voltages in percent Data Logging Interval This is the interval in minutes used for logging voltage and temperature data Logged data is averaged over this interval The...

Page 40: ...ap Disabled One neutral point to ground 15 Volt Ampere Potential Device No unbalance compensation provided Ungrd Wye Cap Cap Only One neutral point to ground 15 Volt Ampere Potential Device and one li...

Page 41: ...eal Time Calculated UBC Value field 5 The Operation screen s N G Unbalance Voltage field now displays the corrected real time neutral to ground voltage value and the Unbalance Compensation in Use fiel...

Page 42: ...LANCE COMPENSATION SET button and the LCD displays Calc UBC in Line 1 and the calculated value in Line 2 12 Pressing the UNBALANCE COMPENSATION button a second time sets the unbalanced compensation fe...

Page 43: ...setpoint is enabled the control device requests a confirmation from the SCADA master station every time a message is delivered If the control device does not receive a confirmation within a specified...

Page 44: ...a filled responses are sent only when the master station issues an EnaUns com mand application function code 14x Enabled V2 mode conforms to the past approach NOTE Enabling this feature may add signif...

Page 45: ...em etc This baud rate must be identical to the baud rate for the communications device Half Full Duplex Port A Half Full Duplex Port B Set this value to match the value selected for the communications...

Page 46: ...ormation in this document and utility practices should be re viewed by appropriate utility personnel and a decision made as to the correct procedures to follow Serious risk of personal injury or death...

Page 47: ...no other capacitor units have been isolated NOTE After automatic lockout of the capacitor bank you must press the LOCKOUT INDICATOR button to return the bank to service This permits closing of the cap...

Page 48: ...larm Time Delay ends The ALARM INDICATOR LED will also turn ON As soon as you read the voltage open the capacitor bank switching device to avoid shortening the life of the capacitor units Verify that...

Page 49: ...creen click the Operation button at any other IntelliLINK screen For a detailed explanation of the Operation screen see View the Operations Information in the Troubleshooting Instruction Sheet 1011 55...

Page 50: ...1011 530 50...

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