Product overview
An MCC coordinates motor feeders, protection, starting methods and control interfaces in one assembly. The design should follow the project motor list, control philosophy, process interlocks and available fault level. Zejiefu reviews these inputs before proposing the feeder-unit arrangement, control wiring and cabinet construction.
Configurable engineering scope
- Direct-on-line, star-delta, soft-starter or VFD feeder coordination
- Fixed or withdrawable units subject to the approved design
- Motor protection, metering, indication and local control
- PLC, remote I/O and communication provisions where specified
- Control terminal, cable-entry and interlocking requirements
Typical applications
- Pumps, fans, conveyors and process equipment
- Water treatment and utility systems
- Manufacturing lines and industrial auxiliaries
- HVAC and building-services motor groups
Information required for quotation
- Motor schedule with power and starting method
- Control voltage and control philosophy
- System fault level and feeder quantities
- Communication and remote-control requirements
- Preferred component make and spare feeders
Standards, drawings and inspection
The applicable IEC standard, routine inspection scope, drawing format and project documentation must be confirmed against the technical specification. Ratings and compliance statements are not assumed before engineering review. Approved general-arrangement drawings and component schedules form the basis for production.
Frequently asked question
What is the most important document for an MCC quotation?
A motor list or feeder schedule is essential. It should identify motor ratings, starting methods, control requirements and quantities.
Application solutions and RFQ guidance
Industrial motor-control applications
Before requesting a configuration, review the SLD and BOQ preparation guide.
Coordinate the APFC capacitor bank data
Where reactive-power compensation is included in the package, provide the existing and target power factor, load profile, required kVAr and harmonic information. Review the APFC capacitor-bank selection inputs before issuing the RFQ.
MCC feeder information to include in the RFQ
| Input | Details required |
|---|---|
| Motor schedule | Motor reference, quantity, kW rating, full-load current and duty |
| Starting method | Direct-on-line, star-delta, soft starter, VFD or project-specific arrangement |
| Control | Control voltage, local/remote selection, start/stop logic and emergency conditions |
| Interlocks | Process permissives, trips, external contacts and sequence requirements |
| Communication | Protocol, remote I/O, status points and interface responsibility |
| Construction | Fixed or withdrawable units, cable entry, spare feeders and IP rating |
Coordinate the MCC with the distribution package
The MCC should be coordinated with upstream protection, standby transfer requirements and reactive-power compensation. Review the ATS panel and APFC capacitor bank panel where they form part of the same package.
For procurement documents, use the SLD and BOQ RFQ guide and the IEC 61439 procurement checklist.
Additional MCC questions
What information is required for a VFD feeder?
Identify the motor data, VFD rating or selection basis, bypass requirement, control method, communications, cable conditions and any harmonic or EMC requirements stated by the project.
Can fixed and withdrawable feeders be included in one MCC package?
The construction can be reviewed against the approved specification and maintenance philosophy. The final arrangement must be confirmed on the general-arrangement and feeder drawings.
Configuration inputs
Provide the single-line diagram, required standard, system ratings, installation conditions and preferred component make. Our technical response will identify the proposed scope and any deviations.
Available options
Electrical scheme, enclosure construction, cable entry, protection, metering, component make, IP rating, packing and documentation are configurable to the approved project scope.
Frequently asked questions
Can this equipment be manufactured to our SLD?
Yes. The final configuration is developed from approved drawings, ratings and component schedules.
Which documents are needed for a quotation?
Send the SLD, BOQ or specification, quantity, destination country and requested delivery schedule.
Are tests and reports available?
Available routine tests and documents depend on product scope. Only confirmed reports will be included in the proposal.