UL PRODUCT CATEGORY

Grounding Equipment, Neutral Grounding Devices Over 600 Volts, KDZC


Guide Information for Electrical Equipment for Use in Ordinary Locations

250.182250.186250.188(A)250.182250.186250.188(A)

GENERAL

This category covers neutral grounding devices intended for use on systems having ac voltage ratings from 601 V to 38 kV. Neutral grounding devices are used for the purpose of controlling the ground current or the potentials to ground of an alternating-current system.

These devices are grounding transformers, ground-fault neutralizers, resistors, reactors, capacitors, or a combination of these. In addition, these devices may include current sensors, relays, audible and visual signaling and similar accessories.

PRODUCT MARKINGS

Devices suitable for outdoor use are marked "Outdoor."

Enclosures are marked to indicate the exposure category (A, B or C) for which they are intended. Enclosures marked "Category A" are intended to be installed in areas accessible to the unsupervised general public; enclosures marked "Category B" are intended to be installed in areas accessible to authorized personnel only; enclosures marked "Category C" are intended for use in areas accessible to qualified personnel only.

Devices covered under this category are marked with the following information: Name of manufacturer, serial number, name of device, type designation, impedance (except resistors), number of phases as applicable, rated current, rated frequency, rated time, rated voltage, BIL of line, indoor or outdoor service, weight, volume of oil (as applicable), instruction book number or equivalent.

PRODUCT IDENTITY

One of the following product identities appears on the product:

    Neutral Grounding Reactor

    Neutral Grounding Resistor

Other product identities may be used as shown in the individual certifications.

ADDITIONAL INFORMATION

For additional information, see Electrical Equipment for Use in Ordinary Locations (AALZ).

REQUIREMENTS

The basic standards used to investigate products in this category are ANSI/IEEE 32, "Requirements, Terminology, and Test Procedure for Neutral Grounding Devices," and IEEE C37.20.3, "Metal-Enclosed Interrupter Switchgear."

UL MARK

The Certification Mark of UL on the product is the only method provided by UL to identify products manufactured under its Certification and Follow-Up Service. The Certification Mark for these products includes the UL symbol, the words "CERTIFIED" and "SAFETY," the geographic identifier(s), and a file number.

Alternate UL Mark

The Listing Mark of UL on the product is the only method provided by UL to identify products manufactured under its Listing and Follow-Up Service. The Listing Mark for these products includes the UL symbol (as illustrated in the Introduction of this Directory) together with the word "LISTED," a control number, and the product name "Neutral Grounding Resistor" or "Neutral Grounding Reactor," or other appropriate product name as shown in the individual Listings.

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Neutral Grounding Devices Over 600 VoltsNeutral Grounding Reactors Over 600 VoltsNeutral Grounding Resistors Over 600 Volts
Last Updated on 2013-05-16
KDZC.GuideInfo KDZC Active 20130516 20060831

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