S&C IntelliCap Plus Operating instructions

S&C IntelliCap®Plus Automatic Capacitor Control
Instruction Sheet 1023-550
© S&C Electric Company 2003-2017, all rights reserved
October 30, 2017
Troubleshooting
Table of Contents
Section Page Section Page
Introduction
Qualified Persons ........................... 2
Read this Instruction Sheet ................... 2
Retain this Instruction Sheet ................... 2
Proper Application ........................... 2
Special Warranty Provisions ................... 2
Safety Information
Understanding Safety-Alert Messages ..............4
Following Safety Instructions .....................4
Replacement Instructions and Labels ..............4
Safety Precautions........................... 5
Troubleshooting Overview
Applicable Software ............................6
LCD Screen ..................................6
IntelliLink® Setup Software.......................6
Electrical Diagrams.............................6
Test Points ...................................7
Tools Required ................................7
Basic Troubleshooting...........................7
Power Problems
Load Fuse is Blown.......................... 8
LED Display and LCD Screen Problems
LED Display Problems ..........................9
LCD Screen Problems ..........................9
Software Troubleshooting
Error Messages ..............................11
Incorrect Real-Time Data .......................12
Miscellaneous Problems. . . . . . . . . . . . . . . . . . . . . 13
Using IntelliLink Setup Software to Locate
Problems
Operation Screen .............................15
Alarm Status Screen...........................18
Trouble Conditions ............................18
Error Conditions ..............................19
Metering Screen ..............................20
Product Information Screen .....................23
Chronological Log.............................24

2 S&C Instruction Sheet 1023-550
Introduction
WARNING
The 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 distribution equipment along with the associ-
ated hazards.
A qualified person is one who is trained and competent in:
• The skills and techniques necessary to distinguish exposed live parts from nonlive
parts of electrical equipment
• The skills and techniques necessary to determine the proper approach distances
corresponding to the voltages to which the qualified person will be exposed
• The proper use of the special precautionary techniques, personal protective
equipment, insulating and shielding materials, and insulated tools for working on or
near exposed energized parts of electrical equipment
These instructions are intended only for such qualified persons. They are not intended
to be a substitute for adequate training and experience in safety procedures for this
type of equipment.
NOTICE
Read this instruction sheet thoroughly and carefully before installing or operating your
S&C IntelliCap Plus Automatic Capacitor Control. Familiarize yourself with the Safety
Information on page 4 and Safety Precautions on page 5.The latest version of this publi-
cation is available online in PDF format at sandc.com/en/support/product-literature/.
This instruction sheet is a permanent part of your S&C IntelliCap Plus Automatic Capacitor
Control. Designate a location where you can easily retrieve and refer to this publication.
WARNING
The equipment in this publication must be selected for a specific application. The
application must be within the ratings furnished for the selected equipment.
The standard warranty contained in S&C’s standard conditions of sale, as set forth in Price
Sheets 150 and 181, applies to the S&C IntelliCap Plus Automatic Capacitor Control, except
that the rst paragraph of the said warranty is replaced by the following:
(1) General: The seller warrants to the immediate purchaser or end user for a period of
10 years from the date of shipment that the equipment delivered will be of the kind and
quality specified in the contract description and will be free of defects of workmanship and
material. Should any failure to conform to this warranty appear under proper and normal
use within 10 years after the date of shipment, the seller agrees, upon prompt notification
thereof and confirmation that the equipment has been stored, installed, operated, inspected,
and maintained in accordance with the recommendations of the seller and standard industry
practice, to correct the nonconformity either by repairing any damaged or defective parts
of the equipment or (at the seller’s option) by shipment of necessary replacement parts. The
seller’s warranty does not apply to any equipment that has been disassembled, repaired, or
altered by anyone other than the seller. This limited warranty is granted only to the immedi-
ate purchaser or, if the equipment is purchased by a third party for installation in third-party
equipment, the end user of the equipment. The seller’s duty to perform under any warranty
may be delayed, at the seller’s sole option, until the seller has been paid in full for all goods
purchased by the immediate purchaser. No such delay shall extend the warranty period.
Replacement parts provided by the seller or repairs performed by the seller under the
warranty for the original equipment will be covered by the above special warranty provi-
sion for its duration. Replacement parts purchased separately will be covered by the above
special warranty provision.
Qualified Persons
Read this
Instruction Sheet
Retain this
Instruction Sheet
Proper Application
Special Warranty
Provisions

S&C Instruction Sheet 1023-550 3
Introduction
Warranty of the S&C IntelliCap Plus Automatic Capacitor Control is contingent upon the
installation, configuration, and use of the control or software in accordance with S&C’s
applicable instruction sheets.
This warranty does not apply to major components not of S&C manufacture, such as
communication devices. However, S&C will assign to the immediate purchaser or end user
all manufacturer’s warranties that apply to such major components.
Warranty of equipment/services packages is contingent upon receipt of adequate informa-
tion on the user’s distribution system, sufficiently detailed to prepare a technical analysis.
The seller is not liable if an act of nature or parties beyond S&C’s control negatively impact
performance of equipment/services packages; for example, new construction that impedes
radio communication, or changes to the distribution system that impact protection systems,
available fault currents, or system-loading characteristics.

4 S&C Instruction Sheet 1023-550
Safety Information
Understanding
Safety-Alert Messages
Following
Safety Instructions
Replacement
Instructions and
Labels
Several types of safety-alert messages may appear throughout this instruction sheet and
on labels attached to the S&C IntelliCap Plus Automatic Capacitor Control. Familiarize
yourself with these types of messages and the importance of these various signal words:
DANGER
“DANGER” identifies the most serious and immediate hazards that will likely result in
serious personal injury or death if instructions, including recommended precautions,
are not followed.
WARNING
“WARNING” identifies hazards or unsafe practices that can result in serious personal
injury or death if instructions, including recommended precautions, are not followed.
CAUTION
“CAUTION” identifies hazards or unsafe practices that can result in minor personal
injury if instructions, including recommended precautions, are not followed.
NOTICE
“NOTICE”identifies important procedures or requirements that can result in product or
property damage if instructions are not followed.
If you do not understand any portion of this instruction sheet and need assistance,
contact your nearest S&C Sales Office or S&C Authorized Distributor. Their tele-
phone numbers are listed on S&C’s website sandc.com Or call S&C Headquarters
at [phone]; in Canada, call S&C Electric Canada Ltd. at [phone].
NOTICE
Read this instruction sheet thoroughly and carefully
before installing or operating your S&C IntelliCap Plus
Automatic Capacitor Control.
If you need additional copies of this instruction sheet, contact your nearest S&C Sales Ofce,
S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.
It is important that any missing, damaged, or faded labels on the equipment be replaced
immediately. Replacement labels are available by contacting your nearest S&C Sales Office,
S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.

S&C Instruction Sheet 1023-550 5
Safety Precautions
DANGER
The S&C IntelliCap Plus Automatic Capacitor Control line voltage input range is 93
to 276 Vac. Failure to observe the precautions below will result in serious personal
injury or death.
Some of these precautions may differ from your company’s operating procedures and
rules. Where a discrepancy exists, follow your company’s operating procedures and rules.
1. QUALIFIED PERSONS.Access to the IntelliCap Plus
Automatic Capacitor Control must be restricted only to
Qualified Persons.
2. SAFETY PROCEDURES. Always follow safe operating
procedures and rules. Always maintain proper clearance
from energized components.
3. PERSONAL PROTECTIVE EQUIPMENT. Always
use suitable protective equipment, such as rubber
gloves, rubber mats, hard hats, safety glasses, arc-flash
clothing,and fall protection, in accordancewith safeoperating
procedures and rules.
4. SAFETY LABELS AND TAGS. Do not remove or
obscure any of the “DANGER,” “WARNING,” “CAUTION,” or
“NOTICE” labels and tags. Remove tags ONLY if instructed
to do so.
5. MAINTAINING PROPER CLEARANCE.Always
maintain proper clearance from energized components.

6 S&C Instruction Sheet 1023-550
Troubleshooting Overview
This instruction sheet was prepared for use with IntelliCap Plus software:
PCSD126S and PCV D126S.
You can find software identification on the IntelliLink® Software Product Information
screen. For questions regarding the applicability of information in this instruction sheet to
future product releases, please contact S&C Electric Company.
WARNING
The information in this instruction sheet is meant only for qualified people who are
properly trained for work with this type of equipment, and who understand the hazards
that may be involved. The information is this instruction sheet is not meant to be a
substitute for training and experience in the safety procedures that are required for this
type of equipment.
WARNING
These instructions do NOT replace the need for utility operation standards. Any conflict
between the information in this document and utility practices should be reviewed by
appropriate utility personnel and a decision made as to the correct procedures to follow.
The S&C IntelliCap Automatic Capacitor Control is connected to switchgear operating
at primary voltage levels. High voltage may be present in the wiring to the switch control
or the switch control itself during certain failures of the switchgear wiring or grounding
system, or because of a failure of the switch itself. For this reason, access to the switch
control should be treated with the same safety precautions that would be applied when
accessing other high-voltage lines and equipment. Follow all locally approved safety
procedures when working on or around this switch control.
Before attempting to access an existing switch installation, check carefully for visible or
audible signs of electrical or physical malfunction (do this before touching or operating
the switch control or any other part of the installation). These warning signs include
such things as smoke, fire, open fuses, crackling noises, loud buzzing, etc. If a malfunc-
tion is suspected, treat all components of the installation, including the switch control
and associated mounting hardware, as if they were elevated to primary (high) voltage.
Applicable Software
LCD Screen
The following tools and features are used to diagnose and correct IntelliCap Plus control
problems:
The LCD screen on the faceplate provides information about the present state of the
control. For an explanation of the faceplate and LCD display, see “The Faceplate” section in
Instruction Sheet 1023-540, “S&C IntelliCap® Plus Automatic Capacitor Control: Operation.”
IntelliLink Setup Software Operation, Alarm Status, Metering, and Pr odu ct
Information screens display information about the IntelliCap Plus control, IntelliCap
Plus operations, and sensor data. For an explanation of these screens, see the “Using
IntelliLink Software to Locate Problems” section in this instruction sheet.
To view these screens, use a portable PC computer, Windows 7, Microsoft
Internet Explorer 5.0 or higher, a serial cable, and the IntelliLink Setup Software for the
IntelliCap Plus control. For more information about the required equipment and how to
use the IntelliLink Setup Software, see Instruction Sheet 1023-530, “S&C IntelliCap® Plus
Automatic Capacitor Control: Setup.”
The electrical interconnect diagrams at the back of Instruction Sheet 1023-530, “S&C
IntelliCap® Plus Automatic Capacitor Control: Setup” show the IntelliCap Plus wiring layout.
IntelliLink® Setup
Software
Electrical Diagrams

S&C Instruction Sheet 1023-550 7
Troubleshooting Overview
Figure 1. Capacitor control components.
Test points are accessible below the faceplate. See Figure 1.
Test Points
Load fuse
Terminal strip
Test points
Tools Required
A properly functioning IntelliCap Plus control shows **UNIT OK** on the rst line
of the LCD screen and scrolls data on the second line. If you suspect trouble, and nd
that the LCD screen is normal, you have two options. You can continue to follow these
troubleshooting instructions, or you can save a snapshot of the control and contact S&C
Electric Company. See the “Using A Snapshot” section in Instruction Sheet 1023-540, “S&C
IntelliCap® Plus Automatic Capacitor Control: Operation.”
If the LCD screen does not show **UNIT OK** or is not scrolling data, check the
error messages described in Table 1 on page 10. To eliminate the possibility of software
malfunction, reload the operating software into the control.
STEP 1. Connect a PC (loaded with IntelliLink Setup Software) to the Local Comm. Port on
the faceplate.
STEP 2. From the Windows START button select: Programs>EnergyLine>Update.
STEP 3. On the Update Control Software dialog box, select the check boxes: Don’t Preserve
Data and High Speed.
STEP 4. Select the START UPDATE button.
STEP 5. The operating system will be reloaded into the IntelliCap Plus control, and the LCD
screen should show: **UNIT OK** on the rst line, and the data should scroll on the
second line.
STEP 6. If the trouble remains, continue following these Troubleshooting Instructions or
contact S&C Electric Company.
Basic Troubleshooting
To correct a problem, one or more of the following tools may be required:
• Multimeter
• 4-inch long, #2 Phillips screwdriver
• 4-inch long, 1/4-inch-blade screwdriver
NOTICE
If the suggested troubleshooting steps do not resolve the problem, call S&C Electric
Company Global Support Monitoring Center at [phone].

8 S&C Instruction Sheet 1023-550
Power Problems
When the load fuse blows, the voltage magnitude the control displays will be
approximately zero.
NOTICE
Before changing a blown load fuse, set the operation mode to fthe Manual setting. This
will prevent any automatic operation.
Follow these steps to check a blown load fuse:
STEP 1. With the faceplate buttons, change the operation mode to the Manual state.
STEP 2. Remove the fuse holder from the faceplate and replace the fuse. See Figure 1 on
page 7.
STEP 3. Switch the bank in and out. If the new fuse blows, check the wiring, peripheral
equipment, and line switches.
Load Fuse Is Blown

S&C Instruction Sheet 1023-550 9
LED Display and LCD Screen Problems
LED Display Problems Follow these steps when the Close and Open LED displays (on the faceplate) are off:
STEP 1. Check theLCDscreen.If itis not operatingnormally,seethe“LCDScreen Problems”
section on page 9.
STEP 2. Do a lamp test. Press the faceplate LAMP TEST button. If the CLOSE or OPEN LED
display does not turn on, but the other LED displays do, the LED display is probably
bad. If none of the LED displays turn on, see the “LCD Screen Problems” section on
page 9.
STEP 3. Switch the bank in or out manually. Press the faceplate OPERATION MODE
CHANGE button so the MANUAL LED display is on. Following utility-approved
work procedures and safety practices, switch the bank with the faceplate CLOSE
or OPEN button. If you are powering-up the capacitor control for the rst time, or
if the control software has been reloaded (not updated), the LED displays do not
indicate the bank state until a switching operation is performed.
LCD Screen Problems Follow these steps when the LCD screen is blank:
STEP 1. Check for ac power to the control. Check for ac voltage between test points
2 (Ac Line) and 3 (Neutral Return) below the faceplate. If there is no voltage:
(a) For controls with a meter base, make sure the Ac Line and Ac Neutral wires are
connected to the proper terminals in the meter base socket.
(b) For controls with a bracket mount, make sure the cable wiring is correct. All
IntelliCap Plus controls have a label inside the enclosure that shows the
correct conguration.
(c) Following utility-approved work procedures and safety practices, verify that there
is 120 Vac in the line which provides ac power to the control.
STEP 2. Replace the LCD screen. There may be a problem with the PC board, the LCD
screen, or the operating system. Call S&C Electric Company.
Follow these steps when the LCD screen does not display **UNIT OK** or the data
line is not scrolling:
STEP 1. Check the LCD screen error messages. Table 1 on page 10 shows possible
messages.
STEP 2. Check for IntelliLink software troubleshooting messages. Connect your computer
to the capacitor control, and start the IntelliLink software. Check for active
messages on the Alarm Status screen. Follow the troubleshooting suggestions for
those messages. See Table 1 on page 10.

10 S&C Instruction Sheet 1023-550
LED Display and LCD Screen Problems
Table 1. Error messages on the LCD display.
Error Message Meaning
[Volt Sensor Err] The voltage sensor is reading outside of its range or
may be faulty.
[Temp Sensor Err] The temperature sensor is reading outside of its range
or may be faulty.
[Neutral Sens Err] Neutral sensing controls only. This message is
displayed before the control locks out the bank following
a neutral current or neutral voltage alarm.
[NeutSens Lockout] Neutral sensing controls only. The level of neutral
current or neutral voltage has caused the control to lock
out the bank.
[HiLoVoltBand Err] The Bank Voltage Change + Margin setpoint is greater
than the difference between the High Voltage Override
Value data and the Low Voltage Override Value data.
[HiLoVoltLockout] The control has locked out the bank because of the
high/low voltage band error.
[ZeroNeut SensErr] Neutral sensing controls only. The control detected zero
neutral current or neutral voltage for the length of the
Zero Neutral Detection setpoint.
[Load Fuse Alarm] The load fuse on the faceplate has blown.
A blown load fuse will be alarmed by all wiring options
except “-J67.” For “-J67” any type of station power, even
dc, could be used as wetting voltage, so the sensing
input is wired to control power, and will not go off if the
load fuse is blown. For all other wiring options the sens-
ing input is wired to the load side of the load fuse, and
the alarm will be set for a blown load fuse.

S&C Instruction Sheet 1023-550 11
Software Troubleshooting
Error Messages Incompatible Ident
The IntelliLink software uses a different screenset (WMN le) for each type of control and
normally selects the screenset for you. This message appears when you have a screenset
selected (displayed) and try to connect to a snapshot (VM le) that requires a different
screenset.
Follow these steps to select the correct screenset:
STEP 1. Close the open screenset. In the File menu select the Close Screenset option.
STEP 2. In the File menu select the Open Snapshot option.
STEP 3. In the Open Controller Data File dialog box, select the snapshot you want to view.
STEP 4. Click on the OK button to open both the snapshot and the correct screenset.
IntelliLink setup incorrect or incomplete
Reinstall the IntelliLink software on your computer.—There may be a problem with
one of the les. See the “To Install the IntelliLink Software” section in Instruction Sheet
1023-530, “IntelliCap® Plus Automatic Capacitor Control: Setup,” for more information.
Opening port COM1....Trying 9600 BAUD....Connection Failed
These messages appear in the Connect dialog box when IntelliLink software cannot establish
communication with the software in the capacitor control. Follow these steps to correct
the problem:
STEP 1. Check that the capacitor control has power. If the LCD screen is blank, the control
has no power and cannot communicate with your portable computer. See the LCD
Display Problems section on page 9.
STEP 2. Check the cable connections between the computer and the control. Check that
the serial cable is plugged into the LOCAL port on the faceplate – or the optical
coupler is attached to the port on the side of the enclosure. Check that the cable is
plugged into the correct port on the computer (usually COM1 on portable
computers).
STEP 3. Check the optical coupler power source. If using an optical coupler, check that it
has ac or battery power.
STEP 4. Try another communications port. The COM1 port on the computer may be broken
or assigned to a different device. Connect the cable to another comm port on the
computer. In the Connect dialog box, click the Change Setup button. From the
pull-down list, select the name of the port where the cable is connected. Click on
the Connect button.
STEP 5. Use a different serial cable. If using the faceplate LOCAL COMM port, the serial
cable between the computer and the capacitor control may have a broken wire or
pin. The cable may be wired for use with a different kind of computer, or it may be
a nullmodem cable.
STEP 6. Check the serial port on the computer. If a 2-wire, ungrounded extension cord is
used to power the computer or the capacitor control during lab testing, it may have
damaged the serial port on the computer. Test the serial port by trying to
communicate with a modem or other serial device.
Program in the control: XXXX... not configured for this program
Reinstall the IntelliLink software on the computer. Make sure to install the software for this
type of capacitor control. See the “To Install the IntelliLink Software” section in Instruction
Sheet 1023-530, “IntelliCap® Plus Automatic Capacitor Control: Setup,” for more information.
Software in control incompatible with open screenset. Connection cannot be
established
The IntelliLink software uses a different screenset (WMN le) for each type of control and
normally selects the screenset for you. This message appears when a screenset is selected
(displayed) and there is an attempt to try to connect to a capacitor control that requires a
different screenset.

12 S&C Instruction Sheet 1023-550
Software Troubleshooting
Incorrect Real-Time
Data
Use the correct screenset. To close the open screenset, in the File menu select the Close
Screenset option. Then in the File menu, select the Open Screenset option and choose
the correct screenset for the capacitor control. When the screenset opens (the Operation
screen is displayed), in the Connection menu, select the Connect to Device option.
Software in control is XXXX... IntelliLink is not properly configured for this
product
Reinstall the IntelliLink software on the computer. There may be a problem with one of the
les. See the “To Install the IntelliLink Software” section in Instruction Sheet 1023-530,
“IntelliCap® Plus Automatic Capacitor Control: Setup,” for more information.
Sensed current is zero on the Operation screen
Check that the sensor cable is securely connected to the sensors and to the capacitor control.
Check that the cable is not damaged. See Instruction Sheet 1023-510, “S&C IntelliCap® Plus
Automatic Capacitor Control: Installation,” for more information.
Following utility-approved work procedures and safety practices, verify that current is
flowing through the sensor and that the sensor is installed properly.
Line Voltage display does not match measured ac voltage
IntelliCap Plus controls calculate True RMS voltage from frequent samples. Digital
voltmeters calculate RMS voltage for a pure sine wave. Voltage harmonics encountered in
power distribution alter the pure sine wave. RMS voltmeters do not account for this, so their
readings are often inaccurate.
True RMS is a repeatable voltage result, independent of waveform harmonic content.
Therefore, voltage override setpoint values can be accurately determined using voltages
displayed and data logged by the IntelliCap Plus control. The Fluke Model 189 True RMS
meter (or equivalent) is the reference voltmeter used to confirm voltage indications on an
IntelliCap Plus control.
Real-time kvar values are wrong
Follow these steps to correct kvar values:
STEP 1. Check the Voltage Transformer Wiring and Voltage Transformer Ratio
setpoints on the Setup>Site-Related screen. The Voltage Transformer Wiring
setpoint should reect how the transformer powering the capacitor control is
wired (phase to ground or phase to phase). The Voltage Transformer Ratio
setpoint should be the ratio of the transformer’s primary rated voltage to 120 volts.
For example, a 12000/120-240 volt transformer has a ratio of 12000/120, or 100:1.
STEP 2. Check the current level. Because of sensor accuracy limitations at low current
levels, phase angle detection and display require a minimum current of 0.5% of full
scale values. Below this threshold, the measured power factor reads “1.000” and
the kvar values read “0.” Current magnitudes continue to be detected and displayed
below the 0.5% threshold.
For example: For a capacitor control with a 600-amp Lindsey sensor, phase
angle detection shuts down at approximately 3 amps. Below 3 amps, the power
factor displayed is 1.000 and the kvars displayed is 0.
STEP 3. Check the Installation Phase Offset setpoint on the Setup>Site- Related screen.

S&C Instruction Sheet 1023-550 13
Miscellaneous Problems
SCADA commands are ignored by the capacitor control
Follow these steps to check SCADA command performance:
STEP 1. Check the SCADA CONTROL LED display. To operate the bank remotely, the
faceplate REMOTE LED display must be lit. If it is not, press the SCADA CONTROL
CHANGE button.
STEP 2. Check for control power. See the “LCD Display Problems” section on page 9.
STEP 3. Check the RTU address. On Page 1 of the Communications Setup screen, check
which communications RTU address is used by this control. Make sure the SCADA
master station is sending commands for this control to the correct address.
STEP 4. Check the baud rate. On Page 2 of the Communications Setup screen, make sure
the baud rate is correct for your communications equipment. For modems, the
baud rate should match the baud rate used by the SCADA master station.
STEP 5. Check your communications hardware. See the appropriate communication
instructions for more information.
Capacitor bank switch does not operate
Follow these steps to check bank switch operation:
STEP 1. Make sure the faceplate LOCAL and MANUAL LED displays are both lit. If the
LOCAL LED display is off, press the SCADA CONTROL CHANGE button. If the
MANUAL LED display is off, press the OPERATION MODE CHANGE button, then
press the CLOSE or OPEN button.
STEP 2. Check the faceplate CLOSE/OPEN LED displays. If the OPEN LED display is
blinking slowly, the Reclose Block delay is operating. Wait until it stops blinking,
thentryswitchingthebankagain.IfbothLEDdisplaysare off,seethe“Incompatible
Ident” section on page 11.
STEP 3. Check the line voltage level. Make sure the line voltage is not below the minimum
required to switch the capacitor bank.
STEP 4. Check the Capacitor Bank Switch Control Pulse Time. Connect the computer to
the control and start the IntelliLink software. Check that the Capacitor Bank
Switch Control Pulse Time setpoint (on Page 2 of the Setup>General screen) is
long enough. See Instruction Sheet 1023-530, “S&C IntelliCap® Plus Automatic
Capacitor Control: Setup,” for more information.
STEP 5. Check the wiring. The wiring between the capacitor control and a bank switch may
be damaged or defective.
STEP 6. Check the capacitor bank primary switch(es). The capacitor bank switch(es) may
be malfunctioning.
Some (but not all) capacitor bank switches do not operate
STEP 1. Check the line-voltage level. Make sure the line voltage is not below the minimum
required to switch the capacitor bank.
STEP 2. Check the Capacitor Bank Switch Control Pulse Time. Connect the computer to
the capacitor control and start the IntelliLink software. Check that the Capacitor
Bank Switch Control Pulse Time setpoint (on Page 2 of the Setup>General
screen) is long enough. See Instruction Sheet 1023-530, “S&C IntelliCap® Plus
Automatic Capacitor Control: Setup,” for more information.
STEP 3. Check the wiring. The wiring between the capacitor control and a bank switch may
be damaged or defective.
STEP 4. Check the capacitor bank primary switch(es). The capacitor bank switch(es) may
be malfunctioning.

14 S&C Instruction Sheet 1023-550
Miscellaneous Problems
Capacitor control is not switching the bank automatically
Follow these steps to trouble troubleshoot automatic switching:
STEP 1. Make sure the faceplate AUTO LED display is lit. If the AUTO LED display is off,
press the OPERATION MODE CHANGE button.
Note: If the capacitor control was in Manual mode and is returned to
Automatic mode, it waits 60 seconds before switching the bank.
STEP 2. Check the Reclose Block eld. If a number appears in this eld on the Operation
screen, the Reclose Block feature is operating. After the timer runs out, automatic
switching should resume.
STEP 3. Check for a Voltage-Override condition. On the Operation screen, check for a
voltage-override message. If a Voltage-Override condition is in effect, make sure
the Voltage-Override setpoints are appropriate for this capacitor bank
installation.
STEP 4. Check for a potential Voltage-Override condition. Check the present line voltage
(on the Operation screen), the Voltage-Override setpoints presently in effect,
and the Bank Voltage Rise + Margin setpoint (on Page 1 of the Setup>General
screen). The capacitor control does not switch the bank if doing so would cause a
Voltage-Override condition. See Instruction Sheet 1023-530, “S&C IntelliCap®
Plus Automatic Capacitor Control: Setup,” for more information.
STEP 5. Check the number of automatic switching cycles. On the Operation Counters
screen, look at the number of automatic switching cycles (switch in and switch out)
for the day. If the number is equal to (or greater than) the Maximum Automatic
Control Cycles Per Day setpoint, further switching is inhibited in Automatic
mode until the next calendar day.
STEP 6. Check whether the bank is scheduled to be active. On Page 4 of the Setup>General
screen, check whether today is a holiday. If the capacitor control is in Timeclock
mode, Time-Biased Voltage mode, or Time-Biased Temperature mode, check
the schedules.
STEP 7. Check for troubleshooting messages. Check for active messages on the
Troubleshooting Event screens. Follow the troubleshooting suggestions for those
messages.
STEP 8. Check manual bank operation. Put the control in Manual mode (the faceplate
MANUAL LED display is lit). Following your company’s procedures, use the
faceplate CLOSE or OPEN button to operate the capacitor bank. If the bank does
not switch, see the “Capacitor bank switch does not operate” section on page 13.

S&C Instruction Sheet 1023-550 15
Using IntelliLink Software to Locate Problems
The IntelliLink software Operation, Alarm Status, Metering, and Product Information
screens helps check the status of the capacitor control and locate the causes of
several problem types.
The Operation screen displays the present status of the control and capacitor bank
along with real-time data from the feeder. The buttons on the screen provide access to other
IntelliLink screens and perform certain capacitor control operations. See Figure 2.
Follow these steps to display the Operation screen:
STEP 1. Connect the computer to the control.
STEP 2. Double-click the IntelliLink icon to start the IntelliLink software. For more details,
see the “To Start the IntelliLINK Software” section in Instruction Sheet 1023-530,
“S&C IntelliCap® Plus Automatic Capacitor Control: Setup.”
STEP 3. If the IntelliLink software is already running, click on the Operation button from
any screen.
Operation Screen
Figure 2. The Operation screen for a var control.
The Operation screen includes the following fields:
Operation Mode: Auto/Manual
These displays show whether Automatic Operation mode is in the Auto or Manual state.
To change the state, make sure the SCADA CONTROL LOCAL LED display is lit, click on
the Change button, and click on the OK button.
Last Bank Command: Close/Open
These displays show the present position of the capacitor bank, unless a problem
prevented bank operation. To initiate a Close or Open command, click the Close or Open
button and click on the OK button.
SCADA Control: Remote/Local
These displays show whether remote operation of the bank via SCADA is allowed. To change
the state, click on the Change button and click on the OK button.
SCADA Communications: Xmt/Rcv
These displays blink when the control sends or receives signals through remote
communications equipment (radio, modem, etc.).

16 S&C Instruction Sheet 1023-550
Using IntelliLink Software to Locate Problems
Model Number
This eld shows the model number of this control.
Control Software Revision
This eld shows the S&C name of the control software version present in this control, for
example PCSD100S.
Serial Number
This eld shows the serial number of the capacitor control.
Alarm Status button
This button takes you to the Alarm Status screen. When any alarms are presently active,
the text on the button ashes.
Present Conditions
Except for the Temperature value, these elds are the true RMS amplitude measurements
for the three phases on the feeder. The capacitor control takes a measurement
every 0.3 seconds. It then averages four measurements and displays the 1.2-second
averaged value. For a more detailed explanation of these elds, see Instruction Sheet 1023-
530, “S&C IntelliCap® Plus Automatic Capacitor Control: Setup.”
The Temperature value is the present air temperature. The temperature sensor is located
on the bottom of the control enclosure.
Neutral Sensor (Total RMS)
This field displays the total RMS value for neutral sensing, when installed. Neutral
sensing alarming uses the Total RMS value when the Neutral Sensing Alarming (Current
o r Vo lt a g e) setpoint on the IntelliLink Setup>Neutral Sensing screen, is set to Total RMS
mode. When the control does not have neutral sensing installed, this eld displays “n/a.”
Neutral Sensor (Fundamental)
This eld displays the fundamental (60-Hz) component of the neutral sensing value, when
installed. Neutral sensing alarming uses the fundamental value when the Neutral
Sensing Alarming (Current or Voltage) setpoint on the IntelliLink Setup>Neutral
Sensing screen is set to Fundamental mode. When the control does not have neutral
sensing installed this eld displays “n/a.”
Voltage Override
This eld shows whether a voltage-override condition is presently active.
SCADA Override
This eld shows whether the SCADA Override feature is in the Enabled state via SCADA
command.
Error Conditions
When the control detects an alarm or an error condition, this eld displays the message
“See Alarm Status.” When this message is present, see the Alarm Status screen for more
information.
Current Flow Direction, Power kvars, and Power Factor (var controls
only)
The control measures the phase angle between the voltage and current waveforms. If the
phase angle is between ±90 degrees, the Current Flow Direction eld shows “Normal.”
The control calculates and displays the measured power factor and measured 3-phase
kvars. For controls with single-phase sensing, the displayed power kvars value is the
calculated single-phase kvars value times three.
When the phase angle is between -90 degrees (the same as +270 degrees) and 0 degrees,
the power factor and kvars are given a negative sign, which indicates that the current wave-
form is leading the voltage waveform.

S&C Instruction Sheet 1023-550 17
Using IntelliLink Software to Locate Problems
When the phase angle is between 90 degrees and 270 degrees, 180 degrees is subtracted.
The power factor and kvars are then calculated and displayed. Under these conditions, the
Current Flow Direction field shows “Reverse.”
A properly configured control indicates “Reverse” only when the line current has
reversed direction due to abnormal switching.
Reclose Block
After opening, the capacitor bank does not reclose for 5 minutes. This allows the capacitors
to discharge. When the reclose block is in effect, this eld shows the time remaining before
the bank can be switched in.
Date
This eld shows the present date in the control.
Control Time
This eld shows the present time in the control.
1-Phase Current (var controls only)
This is the current (in amps), measured by the current sensor and scaled using the
Single-Phase Full-Scale Current setpoint.
Current Flow Direction (var controls only)
When the control is properly congured and power is owing through the circuit in the
normal direction, this eld displays “Normal.” If unusual circuit switching conditions cause
the direction of power ow to reverse, the value changes to “Reverse.” When the phase angle
is outside the +/- 90 degree range, the control displays a “Reverse” message in the Current
Flow Direction eld and subtracts 180 degrees from the phase angle.
Power kVA (var controls only)
This is the present kVA level measured at the location of the current sensor.
Power kW (var controls only)
This is the present kW level measured at the location of the current sensor.
Power kvar (var controls only)
This is the total kvar level measured at the location of the current sensor, calculated as
3 times the single-phase kvars. This assumes a balanced 3-phase system.
Power Factor (var controls only)
This is the power factor calculated as the cosine of the value in the Corrected Phase
Angle eld on the Metering screen. Lagging phase angles are represented as values
between 0 and 90 degrees. Leading phase angles are represented as values between 0 and
-90 degrees.
Adjusted 3-Phase kvars (var controls only)
This is the kvar level that is used by the control when operating in var mode. This value is
different from the Measured 3-Phase kvars value if the bank is switched in and one of
the following is true:
• The current sensor is on the source side of the bank and current ow is reversed.
• The current sensor is on the load side of the bank and current ow is normal.
Number of Operations
This eld shows the total number of switching cycles completed since installation of the
control. The counter updates when the bank switch is opened. This counter is reset to zero when
control software is reloaded (not updated).
Control Strategy
This eld shows the control strategy for the present season.

18 S&C Instruction Sheet 1023-550
Using IntelliLink Software to Locate Problems
The Alarm Status screen shows the present status (active or inactive) of several
troubleshooting-related conditions. See Figure 3.
To display the Alarm Status screen, click on the Operation button from any IntelliLink
screen. Then click on the Alarm Status button.
Alarm Status Screen
Figure 3. The Alarm Status screen (var with Neutral Current control).
This screen has four columns:
Trouble Condition or Error Condition
The name of the alarm.
Alarm Status
When “Active” is displayed the condition presently exists.
Occurred at
The most recent time the alarm became active.
Last Cleared at
The most recent time the alarm became inactive.
The control records the date and time certain trouble conditions last occurred and were
cleared. These conditions indicate that there may be a problem with the bank or the setpoint
values. Trouble conditions are not critical problems.
Maximum Daily Cycles
This eld displays “Active” when the control reaches the Maximum Automatic Control
Cycles Per Day setting. Further automatic switching is inhibited until the next calendar
day. If the control reaches this limit frequently, make sure the setpoints are set appropriately
for this capacitor bank.
Trouble Conditions

S&C Instruction Sheet 1023-550 19
Using IntelliLink Software to Locate Problems
Incorrect Voltage Range
This eld displays “Active” when the voltage is not within ±15% of the nominal voltage. Make
sure the Nominal Operating Voltage setpoint (on Page 3 of the Setup>General screen)
is set correctly.
Low Switching Volt Delta
This field displays “Active” when the actual change in voltage levels during
switching is below the minimum percentage of the expected change. The Minimum
Percentage of Average Delta Voltage setpoint is on Page 2 of the Setup>General screen.
See Instruction Sheet 1023-530, “S&C IntelliCap® Plus Automatic Capacitor Control: Setup,”
for more information.
Low Switching Var Delta (var controls only)
This field displays “Active” when the actual change in kvar levels during switching
is below the minimum percentage of the expected change. The Minimum
Percentage of Average Delta kvars setpoint is on Page 2 of the Setup>General screen.
See Instruction Sheet 1023-530, “S&C IntelliCap® Plus Automatic Capacitor Control: Setup,”
for more information.
Zero Neutral Sensor (neutral current/neutral voltage controls only)
For controls with neutral current sensing, this field displays “Active” when the
control detects zero neutral current for the duration of the Zero Neutral-Current
Detection setpoint.
For controls with neutral voltage sensing, this field displays “Active” when the
control detects zero neutral voltage for the duration of the Zero Neutral-Voltage
Detection setpoint.
Neutral Sensor (neutral current/neutral voltage controls only)
For controls with neutral-current/neutral-voltage sensing, this field displays
“Active” when the neutral current/neutral voltage is above the alarm level for the
duration of the applicable Neutral Change-Time Threshold setpoint.
The Neutral Sensor alarm clears automatically if the problem is corrected before a
retry is performed, after a successful retry, or by placing the control into Manual mode.
The Neutral Sensor trouble condition is active during a Retry-Time Delay period.
The control records the date and time switch and sensor malfunctions last occurred and
were cleared. An error condition requires prompt attention.
Voltage Sensor
This eld displays “Active” when there is a problem with the voltage sensor or when the
sensor readings are outside the valid operating range (± 20% of the nominal voltage).
Temperature Sensor
This eld displays “Active” when there is a problem with the temperature sensor or when
the sensor readings are outside the valid operating range (-40°F to approximately 150°F,
or -40°C to 66°C).
Note: A bad temperature sensor does not prevent the control from operating.
When the control is in Temperature or Time-Biased Temperature strategy, it reverts to
Temperature Sensor Error, Voltage Only strategy, and will switch the bank if a voltage-
override condition becomes active.
Load Fuse
This field displays “Active” when the fuse mounted on the faceplate is blown.
This indicates a problem with the wiring to the capacitor switches or with the
capacitor switches themselves.
Neutral Sensor Lockout
This eld displays “Active” when there is a neutral current or neutral voltage alarm that the
control could not clear. The bank remains locked out until the alarm is reset.
Error Conditions

20 S&C Instruction Sheet 1023-550
Using IntelliLink Software to Locate Problems
High/Low Voltage Band
This eld displays “Active” when the Bank Voltage Change + Margin average value is greater
than the difference between the High-Voltage Override Value setpoint and the Low-
Voltage Override Value setpoint for the present season. See Page 1 of the Setup>General
screen for more information.
Reset NS Lockout
If the control is locked out because of a neutral sensor error, this eld lets you clear the
lockout. If the condition persists, the alarm reappears. The Neutral-Sensor Lockout
condition will also be reset, and the associated neutral alarms cleared, whenever the
control changes operating modes, either from Manual to Automatic mode or from
Automatic to Manual mode. When the neutral condition is still present: in Manual mode
the control will lockout again and in Automatic mode it will attempt Corrective Action
and Retry, if these features are enabled.
Reset Alarms Request
The Reset All Alarms request attempts to clear all trouble and error conditions. When the
condition persists, the alarm will reappear.
The Metering screen displays real-time data and the most recent calculated harmonics.
Except for the temperature and the harmonics, these elds are the true RMS amplitude
measurements for the three phases on the feeder. The capacitor control takes a measurement
every 0.3 seconds. It then averages four measurements and displays the 1.2-second averaged
value. See Figure 4. To display the Metering screen, click on the Metering button from any
IntelliLink screen.
Metering Screen
Figure 4. The Metering screen for the var control.
The Metering screen includes the following fields:
Line Voltage
This is the present value of the voltage seen at the control (in volts), on the nominal
voltage base (for example, 120 Vac). The control software uses this value in calculating the
kvar values.