NorthWestern Energy

The scope of work for the expansion of the 100kV substation consisted of upgrading all the existing protection/control relays for the entire site. This included the installation of a new control house in which Amped I provided the design for six and a half new relay panels.

The design involved three 100kV lines (breaker and a half configuration), one 69kV line, one 100/69kV Auto Transformer, one 100/12.5kV Transformer, six new 12.5kV feeders and two 100kV buses.

AMPED I’s technical role in upgrading the substation included:

  • Installation of 5 Panels for Relaying
  • Power Wiring Diagrams
  • AC/DC Panelboard
  • Control House Layout
  • New & Revised Remote Wiring Diagram for Breaker
  • Control House Wall Wiring Diagram
  • Supervisory Schematics and Wiring for New Breaker Alarms
  • Revise Panel Wiring Diagram
  • Revise 160kV Breaker and Line Schematic Drawings

For this project the following relays were included:

  • (4) SEL-411Ls (one for each line)
  • (2) SEL-487Es (one for each transformer)
  • (2) SEL-487Bs (one for each bus)
  • (7) SEL-351S7 (six feeders and one for the underfrequency load shed)
  • (3) SEL-2522 (SCADA)
  • (1) SEL Axion (SCADA)

• (1) SEL-2440 RTAC (SCADA

Amped I designed and provided the new schematics package for IFA along with the associated demolition drawings. Amped I incorporated all comments on the schematics package prior the IFC submittal. Amped I also designed the wiring drawings package and submitted for IFC.

AMPED I provides exceptional design engineering services for the power transmission and distribution industry including:

  • Protection and Control Design:

One Lines, Three Lines, AC/DC Schematics, Wiring Diagrams, SCADA/RTU and related documents.

  • Communications: 

Fiber, Power Line Carrier, Audio Tone, Microwave, JMUX and other communication means.