Capacitor bank symbol
Also called Capacitor, Power factor correction
A capacitor bank supplies reactive power to correct the power factor and support voltage.
What the capacitor bank symbol means
A capacitor bank supplies reactive power to correct the power factor and support voltage.
ANSI and IEC symbols
One straight and one curved plate, connected to ground for a grounded wye bank.
ANSI SVGWhere you see it
On main switchboards and motor feeders, switched in steps by contactors or breakers.
What is written next to it
On a one-line, the capacitor bank carries its tag and its ratings: rating in kvar, voltage, number of steps and connection (star or delta).
What gets checked at commissioning
Before the capacitor bank is energised, the test records usually cover: capacitance per phase, insulation resistance, discharge resistors and step switching. Each check is recorded against the tag, so the system can be handed over with its evidence. See commissioning software.
ANSI device numbers
Protective functions you will often find with a capacitor bank:
- 60 unbalance
- 59 overvoltage
See the full list of ANSI device numbers with their IEC equivalents.
Related symbols
Frequently asked questions
What does the capacitor bank symbol look like?
On ANSI drawings: One straight and one curved plate, connected to ground for a grounded wye bank. In IEC 60617: Two straight parallel plates.
Is the capacitor bank symbol the same in IEC and ANSI?
No. Two straight parallel plates. The IEC 60617 number is S00567.
Where is a capacitor bank used?
On main switchboards and motor feeders, switched in steps by contactors or breakers.
Which ANSI device numbers go with a capacitor bank?
60 unbalance, 59 overvoltage.
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