What an MCC Panel Is, and What We Build
MCC stands for Motor Control Centre. It is the board that houses the starters for a plant's motors in one place — the contactors, the protection devices and the control circuits that switch each motor and shut it down when something is wrong. Centralising them means one busbar, one set of incoming gear and one place an electrician goes to when a motor trips, instead of a starter bolted to a wall beside every machine.
Wisdom Techno Solutions builds MCC panels to order at our works in Vadodara, Gujarat, for industrial plants, EPC contractors and infrastructure projects across India. Every board is engineered against your motor schedule, load list and system fault level — not adapted from a standard catalogue design.
- DOL, star-delta, soft starter and VFD feeders in the same assembly
- Built inside design-verified licensed systems — Rittal Ri4Power, C&S CX, Siemens SIEPAN
- Fixed, plug-in or fully draw-out feeder modules
- MPCB, MCCB with overload relay, or electronic motor protection relay per feeder
- Form 1 to Form 4B separation, so one starter can be worked on while the rest stay live
- Busbars, switchgear, wiring and enclosure assembled and tested in-house, with a FAT report on every board
From a compact board of a dozen starters to a long lineup with drives, metering and a communication bus, the specifications below cover our standard build. Applicable ratings are confirmed against your specification before manufacturing begins.
MCC Panel Technical Specifications
The table below covers the standard build. Every panel is engineered against the project motor schedule, load list and fault level, so the applicable ratings are confirmed against your specification before manufacturing begins.
| Parameter | Specification |
|---|---|
| Panel type | MCC — Motor Control Centre, housing the starters and protection for the plant's motors |
| Rated operational voltage (Ue) | 415 V AC, 3-phase 4-wire (up to 690 V on request) |
| Rated insulation voltage (Ui) | 1000 V |
| Rated frequency | 50 Hz |
| Busbar system rating | Up to 6300 A on the Rittal Ri4Power licensed system |
| Short-circuit withstand (Icw) | Declared per project against the system fault level and the licensed system's verified configuration |
| Applicable standard | IEC 61439-1 and IEC 61439-2 / IS-IEC 61439 Part 1 and Part 2 |
| Form of internal separation | Form 1 to Form 4B (Form 4B Type II on the C&S CX licensed system) |
| Incoming devices | ACB or MCCB, fixed or draw-out |
| Motor feeders | DOL, star-delta, soft starter and VFD starters |
| Feeder construction | Fixed, plug-in or fully draw-out modules |
| Motor protection | MPCB, MCCB with overload relay, or electronic motor protection relay |
| Protection functions | Overload, short circuit, earth fault, single phasing, phase imbalance, under-voltage |
| Control supply | Control transformer or dedicated control supply, with control MCB per feeder |
| Local / remote control | Selector switch, start-stop pushbuttons, indication lamps and ammeter per feeder as specified |
| Interfacing | Potential-free contacts to DCS or PLC; Modbus RTU / Modbus TCP where specified |
| Busbar material | Electrical grade aluminium or copper |
| Control wiring | 660 / 1100 V grade PVC-insulated stranded copper, ferruled and numbered |
| Degree of protection | IP42 / IP52 / IP54 / IP55 / IP65 |
| Gasketing | Rubber gasket on doors and removable covers, to suit the declared IP rating |
| Enclosure material | MS CRCA sheet steel; stainless steel on request |
| Pre-treatment | Three-tank or seven-tank process, specified per project |
| Paint finish | Epoxy-based primer with powder coating, or synthetic enamel |
| Panel layout | Single front or double front (front and rear access) |
| Heat management | Natural ventilation, filtered forced ventilation with exhaust fans, or panel cooling unit |
| Cable entry | Top or bottom, removable gland plate |
| Installation | Indoor; outdoor with weatherproof construction and canopy on request |
| Future extension | Extendable busbar chamber and spare or blank compartments, when specified at design stage |
| Testing | Routine verification in-house on every assembly; customer, consultant and third-party witnessed FAT supported |
Fixed vs Plug-in vs Draw-out MCC
The starter content is the same in all three. What changes is what has to happen to the rest of the board when one feeder needs work — and that is a maintenance decision, not an electrical one.
| Consideration | Fixed | Plug-in | Draw-out |
|---|---|---|---|
| Removing a feeder for maintenance | Isolate and unwire in place | Unplug the module | Withdraw the module on its rails |
| Downtime for that feeder | Highest | Low | Lowest |
| Does the busbar have to be dead? | Usually yes for the section | No | No |
| Spare module can be swapped in | No | Yes | Yes |
| Cost per feeder | Lowest | Middle | Highest |
| Space per feeder | Least | More | Most |
| Typical fit | Small plants, few motors, planned shutdowns available | Mid-size plants wanting quicker changeover | Continuous process plants where a shutdown is expensive |
| Form of separation usually paired with it | Form 2b or 3b | Form 3b or 4a | Form 4B |
When an MCC Is the Right Choice — and When It Is Not
An MCC earns its place when the motors are numerous and grouped. One busbar, one incomer, one place to go when something trips, and one enclosure to keep clean and cool. Above roughly a dozen motors in the same area, an MCC is almost always cheaper over the life of the plant than individual starters distributed around it.
It is the wrong choice when the motors are few and physically scattered. Cabling every remote motor back to a central board can cost more than the board itself, and a single long feeder run brings voltage drop and cable sizing problems with it. Where distribution and a modest motor group sit together and floor space is tight, a PMCC — distribution and motor control in one assembly — is often the better answer than a separate PCC and MCC.
What to Send for a MCC Panel Quotation
Send these and every offer you receive will be comparable:
- Single line diagram
- Motor schedule — rating, starting method and duty for each motor
- Load list with connected and demand loads
- Transformer rating and impedance
- System fault level
- Required form of separation and IP rating
- Fixed, plug-in or draw-out construction
- Indoor or outdoor installation, single front or double front
- Control philosophy — local, remote, DCS or PLC interface
- Spare feeder and future expansion provision
- Applicable standard, with part and year
Where the motor schedule is not final we can build an offer from an outline feeder list and the transformer rating, and refine it once the schedule exists.
Common Mistakes in MCC Panel Specifications
- Choosing the starting method feeder by feeder without checking the supply. Six DOL starters on one board can pull a starting current the transformer will not tolerate; the starting method belongs to the system, not to the motor alone.
- Adding VFD feeders after the design is fixed. Drives change the harmonic and thermal picture of the whole board, so they belong in the enquiry, not in a variation order.
- Ignoring the heat that drives and starters produce. A board full of VFDs needs its temperature rise re-checked; the IP rating and the cooling arrangement have to be decided together.
- Omitting the fault level from the enquiry. Without it no vendor can size the assembly correctly, and the offers stop being comparable.
- Writing "as per IEC 61439" with no part and no year. The verification evidence a manufacturer submits has to be traceable to a specific standard and configuration.
How Wisdom Techno Solutions Builds MCC Panels
Wisdom Techno Solutions is a licensed partner for three design-verified switchgear platforms — Rittal Ri4Power since 2021, C&S CX since 2023 and Siemens SIEPAN Elite/8PU since 2024. We build inside each system's verified configuration and routine-verify every assembly in-house at our Vadodara, Gujarat facility. Under IEC 61439 the design verification belongs to the system owner and the routine verification to the assembly manufacturer — what that division of responsibility means for a buyer is set out here.
Related Technical Guides
Engineering guides from our team on the calculations and design decisions behind an MCC panel:
- DOL vs star-delta vs soft starter vs VFD — which starting method to choose
- MPCB vs MCCB with overload relay vs electronic motor protection relay
- Soft starter vs VFD — which one to choose
- VFD harmonics — input choke, output choke, dV/dt filter or harmonic filter
- VFD bypass panel design and DOL bypass interlocking
- Form 1 to Form 4B — which panel separation you actually need
- Electrical panel heat dissipation and cooling
- Electrical panel FAT and routine test checklist
Related Panel Types
If this is not the right fit for your layout, these are the alternatives we build to the same standard:
- PCC panels — power distribution from the transformer incomer to the plant's outgoing feeders
- PMCC panels — PCC distribution and MCC motor control combined in one assembly
- IMCC panels — intelligent motor control with communication-enabled motor protection relays
- IPCC panels — intelligent power control with metering and protection on a communication bus
- Draw-out MCC panels — where feeder modules must be withdrawable for maintenance without a shutdown
- IEC 61439 panels — how design verification and routine verification work under the standard
Send Your Single Line Diagram
Email your single line diagram, load list and system fault level and our engineers will come back with a technical offer. Not sure what to send? See what a panel manufacturer needs in order to quote accurately.
| Manufacturer | Wisdom Techno Solutions |
| Works | Plot 9, Nilkanth Industrial Park 1, near Kotambi Stadium, Kamrol, Kotambi, Vadodara, Gujarat 391510, India |
| connect@wisdomtechnosolutions.com | |
| Phone | +91 80002 29727 |
| Working hours | Monday to Saturday, 8:00 am to 5:00 pm IST |
| Delivery lead time | 6 to 7 weeks from drawing approval, subject to switchgear availability |

