BNS Power products
Products for mission-critical power, built to your specification.
We do not sell from a catalog. Every product on this page is a proven design that our licensed PEs adapt to your one-line diagram, load profile, protection scheme, enclosure and environment, then build and factory-test in Sumter, South Carolina. Shipboard or land-based.
Custom by default
Voltage, bus rating, breaker layout, controls, HMI, shock and vibration class, coatings and enclosure are all specified per project. If your requirement is not listed below, it is usually still something we have built.
Marine engineering, land-based value
A switchboard designed to survive MIL-S-901D shock and a rolling deck is over-built for a data center or plant floor. Much of the design carries over, so you get shipboard reliability without a shipboard price premium.
Engineered, then built, then tested
The engineer who designs your system sits in the same building as the technicians who build it and the test bay that simulates shipboard operating conditions.
Low Voltage Switchboards
Custom-designed and built 450V switchboards meeting MIL-spec, ABS-NVR and marine specifications. Buswork and circuit breaker layouts are engineered to the input power capacity of your system, with electronic ground fault detection (EGFD) available. For land-based applications we build to your voltage and configuration: 480V and other standard voltages, custom main bus ratings, and the same PLC-based controls and paralleling schemes proven at sea.
450V marine COTS shock-mitigated switchboards
- Commercial circuit breakers, generator controls and components mounted on custom shock-mitigation platforms
- Wire-wound stainless steel coil shock mounts for superior vibration isolation
- Designed for maritime defense applications requiring shock resistance
450V marine mitigated switchboards
- Ruggedized steel or aluminum frames, doors and panels
- Dual redundant AVR voltage regulation
- Synchronization and load sharing for automatic paralleling between diesel generators
- PLC-based local and remote automated controls
- Custom buswork to required main bus rating
- Interface and controls for 450V auxiliary diesel generators
- Shore power connection
- MG sets for sensitive loads, ship service transformers for non-sensitive loads
Medium Voltage Switchgear
6,600V and 4,160V medium voltage switchgear with custom-designed, MIL-STD-167 vibration-qualified structures engineered for demanding maritime and military environments. Every lineup is configured to your protection scheme, and the same designs serve land-based data centers, utilities and industrial plants with arc-resistant options.
6,600V military-grade switchgear
- Shock-isolated enclosures for high-vibration environments
- Multi-tier, redundant circuit protection
- Vacuum circuit breakers rated for marine durability
- Advanced surge and transient protection
- Integrated power quality monitoring with real-time diagnostics
4,160V marine-certified switchgear
- Corrosion-resistant enclosures with marine coatings
- Mechanical interlocks to prevent operator error
- Redundant power transfer for critical systems
- Fault-tolerant architecture with system isolation
- Thermal management for continuous operation in extreme environments
- Full compliance with marine classification regulations
Key features
- Complete local switchboard and generator controls
- Comprehensive electrical plant protection
- Available arc-resistant technology
- Custom PLC-based control schemes, local and remote
- Integrated condition monitoring and predictive maintenance
- Extensive test data documentation and certification
Marine Motor Controllers
MIL-spec and marine motor controllers for an extensive range of shipboard loads, designed to withstand maritime environments while providing precise control and protection.
MIL-DTL-2212 motor controllers
- MIL-spec contactors, local operators, overloads, fuses and control power transformers
- Contactors from Size 0 to Size 5
- MIL-spec reversing controllers
- Two-speed controllers, reversing and non-reversing
- Duplex controllers
450V marine motor controllers
- Built-in disconnects for safe maintenance
- Industrial-grade motor control components
- Conventional across-the-line starters
- Soft starters to reduce mechanical stress and current surges
- Variable frequency drives for speed control and efficiency
Group / Motor Control Centers
Motor control centers built with marine motor control devices, providing centralized control and protection for multiple motor loads in a space-efficient design. Starter mix, bucket sizes, metering and redundancy are specified per project for shipboard or industrial use.
Features and capabilities
- Centralized control of multiple motor loads
- Space-efficient designs for limited maritime footprints
- Integrated protection and monitoring for all connected motors
- Built-in redundancy options for mission-critical applications
- Comprehensive metering and diagnostics
- Multiple starter types within a single MCC
- Full compliance with marine and military specifications
- Modular design for maintenance and future expansion
Control & Relay Panels
Custom control and relay panels for ships and industrial applications, providing protection and reliable operation for critical systems in the most demanding environments.
Generator control panels
- Local and remote generator control and monitoring
- Comprehensive metering for complete system visibility
- RTD and thermocouple inputs for cylinder temperature monitoring
- Bearing and critical-point monitoring
- Integration with ship power management systems
- Alarm and event logging
- Customizable HMI interfaces
MIL-SPEC control and relay panels
- MIL-spec switches, pushbuttons, indicators and relays
- Shock qualified per MIL-S-901D Grade A
- Ruggedized enclosures for harsh maritime environments
- EMI/EMC shielding and filtering to MIL-STD-461
- Redundancy options for critical control functions
- Modular construction, built-in test capabilities
Water mist fire protection supervisory and monitoring panels
- Pump, valve and fan control with fail-safe operation
- Coordinated PLC-based automation of water pumps and motor-operated valves
- Alarm management and notification
- Redundant control paths, automatic and manual modes
- Compliance with marine fire protection regulations
Multi-Function Monitors
Custom monitoring and protection for 450V ships’ electrical plants: consolidated metering, protection functions and alarm handling in a single shock-qualified unit, integrated with switchboard and generator controls.
Typical functions
- Voltage, current, frequency and power metering
- Under/over voltage and frequency protection
- Reverse power and overload protection
- Ground fault detection
- Event logging and alarm annunciation
- Integration with PLC-based switchboard controls
Quality assurance
Tested like it is already aboard.
Every product is manufactured under an ISO 9001:2015 quality management system and built with military-grade construction and components, tested under simulated shipboard conditions, and delivered with comprehensive technical documentation and support. Configurations are customized to your operational requirements with full compliance to the applicable military, marine, NEC and IEEE specifications, whichever your installation calls for.
- Military-grade construction and components
- Extensive factory testing under simulated shipboard conditions
- Shock, vibration and EMI/EMC qualification to MIL-S-901D, MIL-STD-167 and MIL-STD-461
- Customizable configurations
- Full compliance with military specifications
- Comprehensive technical documentation and support
Need specifications or a quote?
Send us your one-line and load data, or start with a conversation about the application.