Circuit Breakers & Protection procurement guide
Protective devices are specified by rating, breaking capacity and characteristic against the circuits and equipment they protect. Electrical equipment must be selected as part of a system, using load, network, protection, environment and applicable project requirements.
System role and load
The stated applications are Building electrical distribution, Industrial plant protection, Motor and drive circuits and Panel building and assembly. Provide the system role, connected loads, duty, redundancy, future capacity and interfaces with existing equipment.
Ratings, compatibility and acceptance
Compare proposals against Current ratings and pole configuration, Breaking capacity required, Tripping characteristic required, Mounting and enclosure system and Quantities required. Require source-specific drawings, datasheets, protection or coordination information and the test/standard evidence called for by the project.
Installation, protection and support
Confirm enclosure and environmental conditions, cable/termination interfaces, dimensions and weights, transport protection, site access, installation boundaries, testing, commissioning, training, warranty expectations and spare components.
Information to include in your quotation request
Send the single-line diagram or system description, load and duty, Current ratings and pole configuration, Breaking capacity required, Tripping characteristic required, Mounting and enclosure system and Quantities required, quantity, site conditions, existing interfaces, destination, installation/testing scope and required project documents.