PWG604765-1, PWG604772-1, PWG604775-1 - MCC Replacements, Replace Low Voltage Circuit Breakers, Install Surge Suppressor

Electrical Consulting Services. See attached Consultant Scope of Work document for a listing of mandatory consulting deliverables.                                                                                                            

PWG604765-1 - MCC Replacements: Project scope will include a full and in depth review of the Building 3 motor control centres being MCC 301 and MCC302. While these MCC’s service Building 3 the units are physically located within the basement of Building 1. These 600V motor control centers were manufactured by Siemens and are type 8PU equipped with draw-out MCC units. The MCC’s were manufactured in 1983 and are believed to have surpassed their expected life expectancy.  

PWG604772-1 - Replace all Low Voltage Circuit Breakers: Project scope will include a full and in depth review of the Building 4 low voltage circuit breakers (15 units approx.). These double ended switchboards are supplied by transformers 13S and 14S and are 3200A, 65kA, 600/347V switchboards. The Building switchgear which is constructed by Commercial Switchgear Limited utilizes the Merlin Gerin Masterpact low voltage circuit breakers for both the main circuit breakers as well as the feeder circuit breakers. All the feeder circuit breakers within the low voltage switchboards of substations 13S and 14S utilize Merlin Gerin STR 58U trip units which are equipped with built in current meters.                                                                       

PWG604775-1 - Install Transient Voltage Surge Suppressor: Project scope will include a full and in depth review of the of the transient voltage surge suppressor currently in use within Building 4. The Building lacks any low voltage surge suppression device on either of the low voltage main switchboards which are 13S and 14S.

A set of pre-qualification questions as part of this project will be issued by addendum.

See attached documents for further details.