NPTEnergiaNPT designs and manufactures industrial rectifiers for substations — rated voltages of 24, 48, 110, 125, and 220 VDC, with output currents of up to 2,000 A.
Maximum ranges documented for the CIB family; configuration depends on product and project requirements.
Three rectifiers covering different voltage, current, and installation-format profiles.
Every direct-current system has its own needs. That’s why NPT develops the rectifier’s configuration based on the application’s real data — considering voltage, current, power, AC supply, battery bank, loads, redundancy, supervision, communication, and construction characteristics.
The result is equipment sized for the project's actual requirements, avoiding oversized, undersized, or standardized configurations that limit the application.
We do not adapt the project to the product.
We configure the product for the project.
Tell us your system requirements, and our team will help define the appropriate configuration.
Customer requirement
Application, load, and installation environment of the DC system.
Voltage · Current · Power
Electrical parameters defined based on the actual system.
Architecture · Redundancy · Protections
Topology defined according to load criticality.
Format · Supervision · Communication
Physical configuration and integration into the operating environment.
The rectifier converts AC mains power into stable direct current, supplying the DC bus and keeping the battery bank charged. If the mains supply fails, the battery takes over, and the inverter converts that energy back into AC when the project includes AC loads. Continuity of critical loads depends on the battery-bank sizing and system architecture defined for the project.
Primary utility supply
CIB.S · CIB.SP · CIB.T — converts AC into stable DC
Stabilized direct-current distribution
Kept on float charge, takes over if the grid fails
Converts DC back into AC, when the project has AC loads to feed
Lighting, control, and telecom without noticing the transition
Primary utility supply
CIB.S · CIB.SP · CIB.T — converts AC into stable DC
Stabilized direct-current distribution
Kept on float charge, takes over if the grid fails
Converts DC back into AC, when the project has AC loads to feed
Lighting, control, and telecom without noticing the transition
Switched and thyristor-based technologies solve the same problem — converting AC into stable DC — with different trade-offs in efficiency, power range, and robustness.
High-frequency rectifier modules with higher power density and a modular architecture that allows structuring redundant configurations — suited for systems where energy efficiency and maintenance flexibility are a priority.
A proven technology for high direct currents, with operational robustness — suited for large industrial plants and substations.
Every CIB rectifier is designed, assembled, and tested at NPT’s own plant in the Ipiranga district of São Paulo — with direct control over engineering, assembly, integration, and testing.
Technical specification of the rectifier based on the load.
Integration of modules, panel, and instrumentation.
Cabling, local supervision, and communication.
Functional validation before shipment to the customer.
Equipment ready for field commissioning.
We accompany the rectifier through every stage of the direct-current system’s life cycle.
Survey of the system’s load, voltage, and current.
Definition of technology, architecture, and redundancy.
Rectifier production at our own plant in the Ipiranga district.
Functional testing before leaving the factory.
Field commissioning and energization.
Training and after-sales technical support.
Throughout the NPT line’s track record, direct-current power systems have been applied in power utilities, rail transit systems, generation, and critical infrastructure.
Power generationCachoeira Dourada Hydroelectric Plant
110-125 VDC / 200 A thyristor-based system for the Cachoeira Dourada hydroelectric plant.
Thyristor-based direct-current power system for the Cachoeira Dourada Hydroelectric Plant, with three-phase input at 380-400 VAC / 60 Hz and output at 110-125 VDC / 200 A, dedicated to the reliability of the generation plant’s essential systems.
Energy utilityFundão Substation
125 VDC / 100 A thyristor-based system for the Fundão substation.
Thyristor-based direct-current power system for the Fundão substation, with three-phase input at 220 VAC / 60 Hz and output at 125 VDC / 100 A, dedicated to the essential systems of the utility’s operation.
Power generationHenry Borden Power Plant
125 and 250 VDC for the Henry Borden power plant.
Direct-current power systems of 125 VDC and 250 VDC for the Henry Borden power plant, including manufacturing, installation, commissioning, and the respective distribution panels.
Mobility / metro-rail125 VDC thyristor-based and switched systems for Lines 1 and 2 of Rio Metro.
Renewal of the direct-current power systems for the auxiliary and primary substations of Rio Metro Lines 1 and 2: thyristor-based solutions at 125 VDC / 100 A and 35 A, and switched solutions at 125 VDC / 35 A, with input at 220 VAC or 450 VAC.
We design exclusively direct-current rectification systems.
In-house production at our Ipiranga plant, São Paulo.
Technical specification based on the customer’s load and DC system.
Switched and thyristor-based architectures for different application profiles.
Functional validation of every unit before shipping.
Support from project to operation, without intermediaries.
NPT is part of MACH Capital, the group that also controls POWER.
Both companies share a common technical origin in the Brazilian power sector, but today have clearly specialized roles: POWER in substation automation, protection, control, supervision, and retrofit; NPT in industrial rectifiers and direct-current systems.
Discover NPT’s historyBring NPT to your market. Representatives, resellers, and technical partners can develop opportunities with NPT.
Become an NPT partnerTell our team the voltage, current, and application of your project. We’ll get back to you with the right technical configuration for your direct-current system.
