Completed PMCC panel front view, doors closed, built by Wisdom Techno Solutions at the Vadodara works
Front elevation of a multi-cubicle PMCC panel assembly manufactured in Vadodara, Gujarat

What a PMCC Panel Is, and What We Build

PMCC stands for Power cum Motor Control Centre. It is one assembly doing two jobs: receiving the incoming supply from the transformer and distributing it like a PCC, and housing the starters that switch and protect the plant's motors like an MCC. Because both functions share one busbar, that busbar is sized for the distribution load and the motor load together.

Wisdom Techno Solutions builds PMCC 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 single line diagram, load list and system fault level — not adapted from a standard catalogue design.

  • Busbar systems to 6300 A, copper or aluminium, Form 1 to Form 4B separation
  • Built inside design-verified licensed systems — Rittal Ri4Power, C&S CX, Siemens SIEPAN
  • DOL, star-delta, soft starter and VFD feeders in the same assembly
  • Optional PLC integration and SCADA-enabled panels for motor control, process automation and fault diagnostics
  • Modular layout with proper segregation of power and control sections, sized for future extension
  • Busbars, switchgear, wiring and enclosure assembled and tested in-house, with a FAT report on every board

From a compact wall-mounted board to a large modular assembly with feeders, metering and intelligent relays, the specifications below cover our standard build. Applicable ratings are confirmed against your specification before manufacturing begins.

PMCC Panel Technical Specifications

The table below covers the standard build. Every panel is engineered against the project single line diagram, load list and fault level, so the applicable ratings are confirmed against your specification before manufacturing begins.

Parameter Specification
Panel type PMCC — Power cum Motor Control Centre, combining PCC distribution and MCC motor control in one assembly
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)
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
Busbar material Electrical grade aluminium or copper
Control wiring 660 / 1100 V grade PVC-insulated stranded copper, ferruled and numbered
Incoming devices ACB or MCCB, fixed or draw-out
Motor feeders DOL, star-delta, soft starter and VFD starters
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
Metering Multifunction meter on incomer; feeder metering as specified
Communication Modbus RTU / Modbus TCP; Profibus and Profinet on request
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

PMCC Panel vs Separate PCC and MCC

The engineering content is the same either way — the same feeders, the same protection, the same fault level. What changes is floor space, cabling and how the plant is maintained.

Consideration PMCC (one assembly) Separate PCC + MCC
Number of assemblies One Two
Floor space Less More
Interconnecting cable between boards Not required Required, and sized for the full MCC load
Incoming gear One set One set, plus the MCC incomer
Fault containment Distribution and motor control share one enclosure A fault in one board does not involve the other
Maintenance isolation Harder — the whole board is one asset Either board can be shut down independently
Busbar sizing Must carry distribution and motor load together Sized separately for each board
Typical fit Compact plant rooms; motors close to the incoming point Large plants; long distances; high availability requirements

When a PMCC Is the Right Choice — and When It Is Not

A PMCC earns its place where floor space is the binding constraint and the motor group sits close to the incoming point. It removes the interconnecting cable run between a separate PCC and MCC, removes one set of incoming gear, and takes less area in the electrical room. On a compact plant room those three savings are real money.

It is the wrong choice where availability matters more than space. Two separate boards can be shut down independently, and a fault in one does not involve the other. A plant that cannot lose distribution and motor control at the same time should not put them in one enclosure, however tight the room is. That decision belongs at the layout stage, not after the GA is approved.

What to Send for a PMCC Panel Quotation

Send these and every offer you receive will be comparable:

  • Single line diagram
  • Load list with connected and demand loads, separated into distribution feeders and motor feeders
  • Motor schedule — rating, starting method and duty for each motor
  • Transformer rating and impedance
  • System fault level
  • Required form of separation and IP rating
  • Indoor or outdoor installation, single front or double front
  • Busbar material, enclosure material and paint shade
  • Metering and communication requirements
  • Spare feeder and future expansion provision
  • Applicable standard, with part and year

Where the load list is not ready we can build an offer from the transformer rating and an outline feeder schedule, and refine it once the list exists.

Common Mistakes in PMCC Specifications

  • Sizing the busbar on the present load. The transformer, not today's load list, sets the ceiling on a PMCC because it carries distribution and motor load together.
  • Omitting the fault level from the enquiry. Without it no vendor can size the assembly correctly, and the offers stop being comparable.
  • Copying the form of separation from an old tender instead of deciding it from the plant's maintenance philosophy.
  • Adding VFD feeders after the design is fixed. Drives change the harmonic and thermal picture, so they belong in the enquiry.
  • Leaving the ambient temperature unstated. A board verified at 35 °C and installed in a 48 °C room will not deliver its nameplate rating.
  • 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 PMCC 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.

The dispatch documentation issued with every PMCC includes the FAT report, insulation resistance and dielectric withstand results as applicable, approved GA and SLD drawings, the bill of materials with makes as actually supplied, the protection settings as applied, and the punch-point list with documented closure. Customer, consultant and third-party witnessed FAT are all supported at our Vadodara works.

Related Technical Guides

Engineering guides from our team on the calculations and design decisions behind a PMCC panel:

Related Panel Types

If a PMCC is not the right fit for your layout, these are the alternatives we build to the same standard:

  • PCC panels — when distribution and motor control are kept on separate boards
  • MCC panels — motor control only, sized to the motor schedule
  • Draw-out MCC panels — where feeder modules must be withdrawable for maintenance without a shutdown
  • IPCC panels — intelligent power control with communication-enabled protection relays
  • IMCC panels — intelligent motor control with motor protection relays on a fieldbus
  • 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.

ManufacturerWisdom Techno Solutions
WorksPlot 9, Nilkanth Industrial Park 1, near Kotambi Stadium, Kamrol, Kotambi, Vadodara, Gujarat 391510, India
Emailconnect@wisdomtechnosolutions.com
Phone+91 80002 29727
Working hoursMonday to Saturday, 8:00 am to 5:00 pm IST
Delivery lead time6 to 7 weeks from drawing approval, subject to switchgear availability

Frequently Asked Questions About PMCC Panels

What is the full form of a PMCC panel?
PMCC stands for Power cum Motor Control Centre. In simple terms it is one board doing two jobs: it receives the incoming supply from the transformer and distributes it like a PCC, and it also houses the starters that switch and protect the plant's motors like an MCC. Because both functions sit in one assembly, the busbar has to be sized for the total distribution load and the motor load together.
What is the difference between a PMCC and a separate PCC and MCC?
A PMCC is one assembly; a PCC plus MCC is two. The engineering content is the same either way — the same feeders, the same protection, the same fault level. What changes is floor space, cabling and maintenance. A PMCC saves the interconnecting cable run and one set of incoming gear, and takes less floor area. Two separate boards give better fault containment and let you shut one down without touching the other.
When should I choose a PMCC instead of separate boards?
Choose a PMCC when the electrical room is tight, when the motor group sits close to the incoming point, and when the interconnecting cable between a separate PCC and MCC would be long or expensive. Choose separate boards when the plant cannot afford to have distribution and motor control in the same enclosure for maintenance or availability reasons, or when the motor load is large enough that the combined assembly becomes unwieldy.
What is the maximum current rating of a PMCC panel?
We build on the Rittal Ri4Power licensed system, whose busbar system is rated up to 6300 A. The practical limit for a given project is set by the transformer rating, the combined distribution and motor load, and the system fault level rather than by the panel alone. The busbar has to be verified for continuous current and temperature rise, and separately for the short-time withstand current the system can deliver.
Which form of separation should a PMCC panel have?
It depends on how much of the board must stay live while one section is worked on. Form 1 has no internal separation; Form 2b separates the busbars from the functional units; Form 3b adds separation between functional units; Form 4a and 4b additionally separate the terminals of each unit. Plants that cannot shut a whole board down for maintenance normally specify Form 4B. Higher forms increase size and cost, so the choice should follow the maintenance philosophy.
What IP rating should a PMCC panel have?
IP54 is the usual choice for an indoor plant room and IP65 where dust or water jets are present or the panel is outdoors. A higher IP rating reduces natural cooling, so the temperature rise has to be re-checked and forced ventilation with filters or a cooling unit may be needed. We build PMCC panels in IP42, IP52, IP54, IP55 and IP65.
Can a PMCC panel be extended later?
Only if it was designed for extension at the outset — the busbar chamber left extendable at one end, physical space reserved beside it in the electrical room layout, spare or blank compartments provided, and the main busbar sized for the future load rather than only today's. Extending a board that was not designed for it normally means a busbar modification and a plant shutdown.
Which motor starting methods can be built into a PMCC?
Direct on line, star-delta, soft starter and VFD feeders can all sit in a PMCC. The choice per motor comes from the starting torque the driven load needs, the supply's tolerance to starting current, and how often the motor starts. VFD feeders add harmonic and thermal considerations to the panel design, so they should be declared at the enquiry stage rather than added later.
How much floor space does a PMCC save against a separate PCC and MCC?
The saving is not a fixed percentage, because it depends on the feeder count, but three things always go away: one set of incoming gear, the interconnecting cable run between the two boards, and the maintenance clearance one of the two lineups needed. On a compact plant room that is usually the difference between fitting the electrical room you have and building a bigger one. We work the actual figure out on the GA drawing against your room dimensions before the order, not after.
What information do you need to quote a PMCC panel?
Single line diagram and load list matter most. The full list is: SLD; load list with connected and demand loads, separated into distribution feeders and motor feeders; motor schedule with ratings, starting methods and duty; transformer rating and impedance; system fault level; required form of separation and IP rating; indoor or outdoor; single or double front; busbar and enclosure material; metering and communication requirements; spare feeder or future expansion provision; and the applicable standard with part and year.

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