Primary Fuse Sizing Chart - Refer to NEC Requirements Only (When Primary and Secondary Protection is used.) Maximum Ampere Rating for Current Limiting Class CC Fuses based on Transformer Primary Voltage. ATTENTION: To prevent electrical shock, disconnect from power source before installing or servicing.

The fusing philosophies described in this document have been used for many years to create fuse selection and coordination tables for Eaton’s Cooper Power series fuses used in pad-mounted transformer applications. The information provided in this document is meant as a guide only.

Control circuit transformers (CCTs) are used to provide a reduced voltage for control circuits in motor control center (MCC) units. CCTs require primary protection per the National Electrical Code (Article 430-72[c]) and UL Safety Standard 845.

EQUIPMENT PROTECTION FUSING gives the fuse sizes for the protection of transformers and capacitors. FUSE-FUSE COORDINATION presents various tables for coordinating one type of fuse link behind another type of fuse link.

1.1 This specification covers the three main ways that fusing gets inserted in transformer specifications: part number specific, manufacturer specific, generic. 2.1 The following is an example of how fusing can get entered based on a specific kVA and voltage rating.

ABB CT Transformer Fuse Selection Chart - Rev 3, 2010-08. Created By Ross King II - [email protected] All Transformers Include Fuse Blocks CPT Selector and Fuse Chart Primary Voltage: 460/230/208V, 480/240V, 440/220/200V Secondary Voltage: 115/24V, 120/25V, 110/23V Primary Voltage: 460/230/208V, 480/240V, 440/220/200V Output Amps

Technical bulletin with transformer fusing tables for power line construction and maintenance. Includes fuse link ratings for single and three-phase systems.

Primary Fuse (2) required (Littelfuse KLDR)(Class CC Fuse) (CCMR can be used as an alternate) Catalog number FSK4 FSKFB Description CPT Selector and Fuse Chart Primary Voltage: 240/480V, 230/460V, 220/440V 60HZ Secondary Voltage: 120V, 115V, 110V 60HZ Accessories Output Amps 115 Catalog Number VA Rating.

To assist in the selection of fuses, the following chart recommends the maximum primary fuse rating, in amperes. The first number shown is the maximum overcurrent protection when the primary current is less than 2 amps and the overcurrent protection device is rated for 300%.

1997年1月1日 · Primary Fuse Sizing Chart Fuse size based on time delay class CC fuses. NOTE: Bold lines indicate changes in the percent of rated current used to calculate fuse sizes in accordance with article 450 of the NEC.