We regularly receive enquiries that ask for a price on an IMCC panel when the drawing attached actually describes a power control centre, and occasionally the reverse. The confusion is understandable, because both are large floor-standing low-voltage assemblies built from similar hardware. Their jobs are different.
The power control centre
An LTPCC sits close to the transformer secondary and handles incoming supply. Its work is distribution: receiving a large incomer, providing metering and protection, and splitting the supply into outgoing feeders that serve motor control centres, distribution boards and large individual loads. The design pressure here is short-circuit withstand and busbar capacity, because everything downstream depends on this assembly staying intact during a fault.
The intelligent motor control centre
An IMCC sits downstream and controls motors. Each functional unit is a starter of some kind, direct on line, star delta, soft start or drive fed, with protection and control wiring for that motor. The word intelligent refers to the communication layer: relays and modules that report current, trip cause and run hours upstream instead of only closing a contact. That data is what makes remote diagnosis possible when a motor trips at three in the morning.
Choosing between them is usually not the question
In most plants both are present. The practical questions are where the boundary sits, how many outgoing feeders the PCC must carry, and whether the MCC should be built with withdrawable or fixed modules. Withdrawable units cost more and pay for themselves in plants where a starter swap cannot wait for a shutdown.
- Count the motor loads and their starting method before fixing the MCC length.
- Confirm the incomer rating and fault level for the PCC, since that drives busbar and bracing design.
- Decide the communication protocol early, because retrofitting a fieldbus into a finished MCC is expensive.
- Allow spare units. Every plant grows, and empty compartments are cheaper than an extension section later.
What we manufacture
Zenon Control Tech builds both from our facility in Morbi. IMCC panels are supplied with dust-proof, sturdy construction for continuous duty and rated currents up to 2000 amps, and LTPCC assemblies are built against the fault level and feeder schedule on your drawing. Both leave the shop floor routine tested with a certificate against the order.