JK Series
Product Specification
720A MEDIUM VOLTAGE FIXED CONTROLLER
1.
Standards
1.1 Basic controller shall comply with NEMA ICS3-1993, Part 2 (ICS2-324) and UL 347
Standards. Basic controller can be UL/CUL Listed.
2.
Structure
2.1
Dimensions
Across-the-Line (one-high) - 36"W x 36"D x 90"H
Reduced Voltage Autotransformer - (2) 36"W x 36"D x 90"H
2.2
Fabrication
2.2.1 11 gauge frame with 16 gauge side, back and top sheets.
2.2.2 Front of cubicle to be an all-welded assembly. Remainder of frame to be bolted
construction.
2.2.3 Side, back and top sheets to be removable for easy access for assembly and wiring.
2.2.4 Basic dimensions and squareness of cubicle to be controlled by accurately located NC-
punches holes. With exception of welded front frame, cubicle should be capable of being
assembled without a fixture.
2.2.5 All doors shall be minimum 12 gauge steel.
2.2.6 All structural components shall be given a corrosion resistant finish by either galvanizing or
painting. Galvanized steel shall be used only for internal structural members or panels.
2.2.7 All panels used to mount low voltage devices shall be painted white for superior visibility.
Panels shall be easily removable or swing-out to provide access to horizontal bus mounted in the
rear of the cubicle.
2.3 General Arrangement of Components
2.3.1 Medium voltage compartments, low voltage compartments, power bus compartments and
field conductor wireways shall be isolated by grounded steel barriers.
2.3.2 Complete front accessibility to all components shall be provided for installation against
walls or for back-to-back arrangements.
2.3.3 Low voltage components shall be located so that components are accessible with medium
voltage door closed. Low voltage compartment shall be sized with consideration to mounting
commonly used devices.
2.4
Handling and Installation
