Air Circuit Breakers
High-capacity ACB incomers, bus couplers and drawout arrangements for large LV switchboards and critical plant rooms.
View productsCircuit Breakers & LV Distribution
Product detail
Circuit Protection
Circuit protection for main intake, sub-main distribution and final circuits.
Nairobi Power Engineers-style product structure with the technical depth kept behind the product cards and modal. Use this page to choose the correct breaker family, then drill into the subpages for ratings, sources and application fit.
View product familyProduct Family
Select the breaker family for the job
Each card leads to a focused subpage with only the relevant range, applications, and technical ranges for that breaker family.
Earth Leakage Relays
Relay and toroid protection for industrial feeders, pump panels and selectivity-focused leakage schemes.
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Miniature Circuit Breakers
DIN-rail final-circuit protection for lighting, sockets, small power and board-level outgoing ways.
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Moulded Case Circuit Breakers
Adjustable MCCB feeder protection for MDBs, SMDBs, equipment feeders and large plant distribution.
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Residual Current Devices
RCD and RCBO protection for domestic, commercial and inverter-connected final circuits.
View productsMain Distribution Boards
Main LV intake boards with ACB or MCCB incomers, metering and outgoing feeders for the whole installation.
View productsSub-Main Distribution Boards
Sub-main boards that split the main intake into floor, zone and plant-room distribution.
View productsFinal Distribution Boards
Final circuit boards and consumer units feeding lighting, sockets, small power and HVAC controls.
View productsTechnical detail library
Product Range & Target Markets, Switchboard Features and Options:
Choose the correct LV distribution path before sizing: main intake, sub-main distribution, final circuits or panel hardware. Open the cards for ratings, source basis, build options and direct contact links.
Anatomy of an NPE panel
Inside a distribution board (MDB / SMDB)
NPE manufactures main and sub-main distribution boards to IEC 61439-1 & 2 in Form II, III and IV (Type 6) construction. The numbered call-outs map the components inside each board.
- 1Incoming ACB / MCCB
- 2Busbar chassis system
- 3Outgoing MCCB feeders
- 4Final MCB / RCBO ways
- 5Earth leakage protection
- 6Door metering & instruments
- 7Cable entry & terminals
Build standard
Standard
IEC 61439-1 & 2
Rated current
Up to 2500 A
Voltage
Up to 415 V
Protection
IP 41–65
Forms
II / III / IV (Type 6)
Earth leakage
ELP 0–500 mA
Standard ratings 400, 800, 1000, 1600 and 2500 A; sheet steel 1.5–2 mm with adequate incoming and outgoing cable spacing.
Engineering Calculator
Instant Technical Sizing
Enter parameters for real-time IEC/KPLC-standard sizing. Results update dynamically.
Sizing results
Design Current
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Recommended Breaker
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Recommended Type
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Copper Cable Size
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* For reference only. NPE engineering verifies configurations prior to build.
Frequently Asked Questions
What is included in Circuit Breakers & LV Distribution?
Our Circuit Breakers & LV Distribution solutions are custom-engineered and assembled locally at our Baricho Road workshop in Nairobi. A standard build includes high-quality modular enclosures, premium copper busbars (rated for local environmental conditions), type-tested circuit breakers or control elements from trusted global partners (ABB, Schneider Electric and CHINT), and comprehensive routine test certifications before delivery.
Which standards and ratings should be confirmed?
All assemblies comply with KEBS and EPRA regulations. You should confirm the required operational voltage (typically 415V three-phase or 240V single-phase in Kenya), rated current, prospective fault levels (e.g., 35kA or 50kA as per KPLC system requirements), form of separation (up to Form 4b), IP rating (IP31 indoor / IP54 for dust-heavy sites), and cable entry orientation (top or bottom entry).
How does NPE choose the product architecture?
NPE starts with the single-line diagram, load schedule and operating sequence, then selects the circuit protection path, device families, enclosure format, controls and testing requirements.
What information does NPE need to quote Circuit Breakers & LV Distribution?
Send the single-line diagram, load schedule, incoming supply details, fault level if known, preferred OEM brand, cable entry direction, installation environment and delivery location.
Can NPE supply ABB, Schneider Electric and CHINT options?
Yes. NPE can quote ABB, Schneider Electric, CHINT or a mixed-OEM architecture according to rating, availability, monitoring requirement, lifecycle support and budget.
Can the system include monitoring and remote signals?
Yes. Metering, alarms, Modbus, Ethernet, BMS contacts, SCADA points and commissioning checks can be included where the selected product family supports them.
Product enquiry
Do you have a Circuit Breakers & LV Distribution enquiry? Get in touch...
Use the calculators for a first-pass engineering check, then send us the SLD and load schedule for a project-ready selection.
24/7 Emergency Support
Electrical service you can count on
When circuit breakers and LV distribution equipment fails, you need fast, reliable help from experienced engineers. We offer around-the-clock emergency support across Nairobi and East Africa — keeping your plant safe and powered, day or night. Whether it is an urgent breakdown or a scheduled repair, our team is ready to respond whenever you need us.
Cost and Estimates
Circuit protection costs vary significantly depending on several key factors. Here is what you need to know to make informed decisions and avoid unexpected expenses.
What Affects the Cost?
The price of a circuit protection package depends on the load schedule, fault level, enclosure form and IP rating, plus the OEM equipment you specify. Site conditions and delivery timelines also move the number.
Get a Detailed Estimate
Our engineers issue itemised quotations covering equipment, assembly, factory testing and delivery — no hidden fees. You know exactly what to expect before any work begins.
Smart Maintenance
Scheduled inspection, thermographic surveys and torque checks catch small issues early, helping you avoid major repairs. Planned maintenance extends system life and protects uptime.
Fast, Reliable Response
Whether it is a scheduled upgrade or an urgent call, our Nairobi workshop at Baricho Road responds quickly and gets the job done right — minimising downtime and keeping you safe.
When in doubt, put safety first
If you are ever unsure or feel unsafe around an energised assembly, do not take chances — call a licensed engineer. Safety always comes first. Feel free to contact us or give us a call.
+254 0737-944-014How to stay safe during an electrical emergency
Overheating or Burning Smell
Isolate the supply if it is safe to do so, keep people clear of the panel and call us immediately. A burning smell around an enclosure usually indicates a loose termination or an overloaded circuit and must never be left running.
Nuisance Tripping
Repeated tripping is a symptom, not the fault. It usually points to overload, an earth leakage path or a device sized incorrectly for the duty. We test the circuit, verify discrimination and correct the root cause rather than resetting the device.
Safe Isolation and Access
Only competent, authorised personnel should open a live assembly. Follow lock-off and permit-to-work procedures, and use the correct PPE and rated test equipment for the fault level of the installation.
Routine Inspection Intervals
We recommend periodic inspection and testing in line with the KS/IEC regime for your installation category, with thermographic scanning on critical boards. We can hold the schedule for you and report against it.