Contents
1.Scope 1
2.Normative references 1
3.Definitions 2
4.Service conditions 3
4.1Normal service conditions 3
4.2Abnormal service conditions 4
5.Ratings and capabilities 4
5.1Standard ratings 4
5.2Capacitance tolerance 5
5.3Maximum operating voltage, current and kvar 5
5.4Typical voltage and reactive power ratings for capacitors 5
5.5Insulation classes 6
5.6Frequency 6
5.7Ambient temperature 6
5.8Overvoltage and overcurrent withstand capabilities 7
6.Manufacturing 7
6.1Thermal stability 7
6.2Basic impulse insulation level 7
6.3Internal discharge devices 8
6.4Radio influence voltage (RIV) 8
6.5Bushings 8
6.6Connection provisions 8
6.7Internal fuses for internally fused capacitors 10
6.8Information to be provided with capacitor and capacitor equipment 11
6.9Dimensions 12
6.10Electrical bonding provisions 15
6.11Color 15
7.Testing 15
7.1Design tests 15
7.2Production tests 22
Annex A (informative) Bibliography 25
Annex B (normative) Test procedure for the disconnecting test on internal fuses 26
1.Scope
This standard applies to power capacitors rated 216 V or higher, 2.5 kvar or more, and designed for shunt connection to alternating current transmission and distribution systems operating at a nominal frequency of 50 Hz or 60 Hz.
2.Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
ASTM D1535, Standard Practice for Specifying Color by the Munsell System.1
IEEE Std 1036™, IEEE Guide for Application of Shunt Power Capacitors.2, 3
IEEE Std 1313.2™-1999, IEEE Guide for the Application of Insulation Coordination
NEMA CC 1-2009, Electric Power Connection for Substations.4
NFPA 70, National Electrical Code® (NEC®).5
3.Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause. 6
ambient temperature: The temperature of the air into which the heat of the equipment is dissipated.
NOTE 1—For self-ventilated equipment, the ambient temperature is the average temperature of the air in the immediate neighborhood of the equipment.7
NOTE 2—For air- or gas-cooled equipment with forced ventilation or secondary water cooling, the ambient temperature is taken as that of the ingoing air or cooling gas.
NOTE 3—For self-ventilated enclosed (including oil-immersed) equipment considered as a complete unit, the ambient temperature is the average temperature of the air outside of the enclosure in the immediate neighborhood of the equipment (see 5.7).
capacitor bank: An assembly at one location of capacitors and all necessary accessories, such as switching equipment, protective equipment, controls, etcetera, required for a complete operating installation. It may be a collection of components assembled at the operating site or may include one or more piece(s) of factory-assembled equipment.
capacitor element: The basic component of a capacitor unit consisting of two electrodes separated by a dielectric.
capacitor equipment: A complete assembly of capacitors, including accessories such as buses, connectors, dischargers, and fuses, suitable for connection to a power system.
discharge device: An internal or external device permanently connected in parallel with the terminals of a capacitor for the purpose of reducing the trapped charge after the capacitor bank is disconnected from the energized power system.
externally fused capacitor bank: A capacitor bank with fuses external to the (power) capacitors.
fused capacitor: A capacitor having fuses mounted on its terminals, or inside a terminal enclosure, or inside the capacitor case, for the purpose of disconnecting a failed capacitor element, unit or group.
fuseless capacitor bank: A capacitor bank without any fuses, internal or external, which is constructed of (parallel) strings of capacitor units. Each string consists of capacitor units connected in series.
indoor (prefix): Not suitable for exposure to the weather.
NOTE—For example, an indoor capacitor unit is designed for indoor service or for use in a weatherproof housing.
internal fuse of a capacitor: A fuse connected inside a capacitor unit, in series with an element or a group of elements.
internally fused capacitor unit: A capacitor unit, which includes internal fuses.
internally fused capacitor bank: A capacitor bank with internally fused capacitor units.
metal-enclosed equipment: A capacitor equipment assembly enclosed in a metal enclosure or metal house, usually grounded, to prevent accidental contact with live parts. Syn: metal-housed equipment.
metal-housed equipment: See: metal-enclosed equipment.
outdoor (prefix): Designed for use outside buildings and to withstand exposure to the weather.
power capacitor (capacitor, capacitor unit): An assembly of dielectric and electrodes in a container (case), with terminals brought out, that is intended to introduce capacitance into an electric power circuit.
NOTE—The abbreviated term “capacitor” or “capacitor unit” is used interchangeably with “power capacitor” through- out this standard.
proof (suffix): An apparatus is designated as dustproof, splashproof, etc., when so constructed, protected, or treated that its successful operation is not interfered with when subjected to the specified material or condition.
rack: A structure that supports the capacitors.
string (string of capacitors) (string of capacitor elements): Capacitors connected in series between two terminals without parallel connection(s).