OCB Breaker Control Panel Wiring Components.pdf

This document is a technical specification file containing McGraw-Edison Power Systems Division product performance data and design documentation for electrical equipment components.

The file includes BTCT (Bushing-Type Current Transformer) exciting current curves for Type OE-12 units (Drawing No. A194129) operating at 60 cycles frequency with a maximum ratio of 1200/5 and 240 total secondary turns. The secondary resistance is specified at 0.0314 ohms per turn with a tolerance of ±0.024 ohms at 75°C, and ASA accuracy rating of 10L800. Marked ratio configurations range from 100/5 to 1200/5 with corresponding secondary turns and tap designations. The document also provides BTCT ratio correction factor curves for the same transformer type under ASA standard F-2 (2 ohms, 50 percent power factor lag) secondary burden specifications. Additionally, the file contains a complete wiring diagram for assembled switchgear (SGA01186A), device function numbers legend identifying 99 relay and control device types, miscellaneous device designation codes, and detailed mechanical and electrical schematic drawings including current transformer specifications, relay configurations, control circuits, and component mounting details for McGraw-Edison switchgear assembly located in Canonsburg, Pennsylvania.