Skip to main content

Main navigation

  • Documents
  • Search

User account menu

  • Log in
Home
Nashua City Data

Breadcrumb

  1. Home
  2. Finance Committee - Agenda - 4/15/2020 - P252

Finance Committee - Agenda - 4/15/2020 - P252

By dnadmin on Mon, 11/07/2022 - 13:32
Document Date
Fri, 04/10/2020 - 14:58
Meeting Description
Finance Committee
Document Type
Agenda
Meeting Date
Wed, 04/15/2020 - 00:00
Page Number
252
Image URL
https://nashuameetingsstorage.blob.core.windows.net/nm-docs-pages/fin_a__041520…

Request for Proposal - “T ol
FN

Jackson Mills Date: Mar 12, 2019 —
_ Powering Business Worldwide
Revision: 0.0 |

1 Unit Start/Stop Control Switch
1 SEL-700G Generator Protection Relay
1 Lockout Relay

3.3 NETWORK ARCHITECTURE

The heart of the Automation System is the Programmable Logic Controller (PLC). For this
project, Eaton Corporation proposes the Rockwell Automation CompactLogix platform by Allen
Bradley. The Rockwell Automation Plant Automation Controller (PAC) is the preferred solution
for turbine control systems. All Logix controllers operate with a multitasking, multiprocessing
operating system and support the same set of instructions in multiple programming languages.
The CompactLogix environment offers different levels of redundancy that can be designed into
each system. For this project, the selected CompactLogix process system works with in-rack
and/or remote I/O, drives, operator interfaces, relays, meters or any other devise that can
communicate with a CompactLogix controller over an Ethernet link.

The Rockwell Automation CompactLogix platform included as part of this project features the
latest version of processor and required I/O. Included as part of this offer, is the I/O proposed
based on the project specification as well as our experience. A minimum amount of spare I/O is
included as part of this offer.

The Human Machine Interface (HMI) will be a Maple Systems 15” Touch Screen HMI,
communicating with the Allen Bradley PLC over Ethernet Communications. The switchgear
mounted HMI will perform all necessary annunciation, alarm logging and control functions to
safety and efficiently operate the unit.

The existing Allen Bradley controller (Crest Gate & Compressor) will be integrated into the unit
and station control system, for a seamless control architecture. All thermal and mechanical
monitoring equipment (RTDs, Vibration Sensors, etc.) shall be connected directly to the PLC for
proper logging, annunciation and unit protection.

Eaton Corporation’s offer includes the installation and integration of single Eaton Power Xpert
Multi-Function Meter and will be polled by the CompactLogix PLC across a new Ethernet
network. Electrical metering parameters will be displayed on the HMI.

The existing SCADA network will be reworked and integrated into the new plant control system.

3.4 PROTECTIVE RELAYING & AUTO SYNCHRONIZING

Eaton Corporation has evaluated several different options relating to the protection and
synchronizing schemes, including dedicated auto synchronizers and protective relays. It is our
recommendation, based on economics, reliability and ease of installation, to proceed with the
installation of a Schweitzer Engineering Laboratory 700G Generator Protection Relay. Relay
settings development, testing and final documentation are included as part of this offer. In
addition, the protection functions requested as part of the RFP (listed below) will be included in
the SEL 700G. The PLC will poll these relays to provide appropriate targets during trip events.

25A — Automatic Synchronizing

© 2019 Eaton Corporation. This submittal contains material which is Proprietary and Confidential to Eaton Corporation 5 | P a e
It may only be used to evaluate and respond to this proposal. Unauthorized use and/or disclosure is strictly prohibited, g

Page Image
Finance Committee - Agenda - 4/15/2020 - P252

Footer menu

  • Contact