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Six busway product lines.
One singular focus.

From low-current lighting trunking to 11 kV high-tension bus ducts — every EI Busways product is engineered for its specific application domain. Click any section below for full technical specifications.

PRODUCT 01

Lighting Busway

EI Lighting Busway is a modular plug-in busway system for distributing power to lighting circuits in factories, warehouses, commercial buildings and public spaces. Plug-in sockets at 500 mm intervals allow tool-free relocation of luminaires without interruption to the main supply.

Current Range
25 A — 125 A
Voltage
230 / 400 V AC
Short Circuit
Up to 10 kA
IP Rating
IP42 / IP54
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EI Lighting Busway

Electrical Technical Data

ParameterValue / RangeStandard
Rated Voltage230 / 400 V AC, 50 HzIEC 61439-6
Insulation Voltage (Ui)1000 VIEC 60664
Current Ratings25, 40, 63, 80, 100, 125 AIEC 61439-6
Short-Circuit (Ics)Up to 10 kA rmsIEC 61439-6
No. of Poles3P + N + PE / 2P + PE—
Voltage Drop (63 A Al)≤ 1.1 mV/A/mIEC 61439-6
Power Loss (full load)≤ 8 W/m—

Key Features

Lighting busway plug-in detail Industrial lighting busway in application Lighting busway product
Data Centre Track and Rack Busway
PRODUCT 02

Data Centre Track & Rack Busway

Intelligent busway distribution for hyperscale data centres, colocation facilities and server rooms. Hot-swap tap-off units enable live moves, additions and changes (MAC work) without de-energising the main run.

Current Range
125 A — 250 A
Short Circuit
Up to 30 kA
Tap-off Pitch
300 / 150 mm
Monitoring
Modbus / SNMP
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Electrical & Monitoring Specifications

ParameterSpecification
Rated Voltage230 / 400 V AC, 50 Hz
Current Ratings125, 160, 200, 250 A
Short-Circuit (Ics)Up to 30 kA rms
Communication ProtocolModbus RTU / TCP, SNMP v2c/v3
Per-Phase MeasurementsV, I, kW, kVAr, kVA, PF, Frequency, THD
Energy CounterkWh, kVArh, kVAh — bidirectional
Threshold AlarmsConfigurable over/under V, I, PF; thermal alerts
Optional Display2.4" colour TFT on tap-off unit

Key Features

Data centre busway detail Monitoring tap-off units Data centre installation
PRODUCT 03

Compact Air Insulated Busway

Cost-effective busway distribution for medium-current industrial and commercial applications. The compact steel enclosure design enables installation in tight spaces including risers, ceiling voids and cable ducts.

Current Range
200 A — 1000 A
Voltage
415 V AC
Short Circuit
Up to 50 kA
IP Rating
IP54
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Compact Air Insulated Busway cross-section

Technical Specifications

ParameterValue / Range
Current Ratings200, 315, 400, 630, 800, 1000 A
Short-Circuit (Ics)Up to 50 kA rms for 1 second
Voltage Drop (400 A Al)≤ 1.8 mV/A/m
Voltage Drop (630 A Al)≤ 1.6 mV/A/m
Rated Impulse Voltage (Uimp)8 kV
Conductor1350 series Aluminium / ETP Copper
Operating Temperature-25 °C to +55 °C

Key Features

EI Sandwich Busway with conductor stack visible
PRODUCT 04 · FLAGSHIP

Sandwich Busway

Our flagship high-current busway. Flat copper or aluminium conductors sandwiched between layers of epoxy glass insulation, enclosed in a rigid steel housing. Ultra-low reactance, balanced three-phase impedance, and 240-minute fire resistance.

Current Range
400 A — 6300 A
Short Circuit
Up to 120 kA
Fire Rating
240 minutes
IP Rating
IP54 / IP66
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Full Electrical Specifications

ParameterValue / RangeStandard
Rated Voltage415 / 440 V AC, 50 HzIEC 61439-6
Current Ratings400, 630, 800, 1000, 1250, 1600, 2000, 2500, 3200, 4000, 5000, 6300 AIEC 61439-6
Short-Circuit (Ics)120 kA peak / 50 kA rms for 1 sIEC 61439-6
Voltage Drop (1600 A Cu)≤ 0.18 mV/A/mIEC 61439-6
Insulation SystemEpoxy Glass Laminate (EGL)Class F (155 °C)
Fire Resistance240 minutes wall penetrationIEC 61439-6 Cl.10.102
No. of Poles3P / 4P (3P+N) / 5P (3P+N+PE)—

Key Features

Sandwich busway product Sandwich busway detail Sandwich busway in data centre application
PRODUCT 05

Solar Application Busway

Specially engineered for the demanding DC and AC distribution requirements of utility-scale and rooftop solar PV plants. Enhanced UV resistance, weatherproof enclosures, and robust corrosion protection — including marine-grade for coastal applications.

DC Voltage
Up to 1500 V DC
AC Voltage
415 / 690 V AC
Temperature
-40 to +70 °C
IP Rating
IP55 / IP66
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Solar PV plant with EI Busways

Technical Specifications

ParameterValue / Range
Rated DC VoltageUp to 1500 V DC (IEC 62548)
Rated AC Voltage415 / 690 V AC
Current Ratings (DC)630, 800, 1000, 1250 A (DC bipolar)
Current Ratings (AC)630 to 6300 A (3-phase)
Short-Circuit WithstandUp to 120 kA peak
Enclosure Material3 mm hot-dip galvanised steel + PVDF outdoor coat
InsulationXLPE / EPR (UV stable, halogen-free)
Corrosion ClassC4 / C5 (ISO 12944) / C5-M marine grade
UV ResistanceTested per IEC 60068-2-5 (1000 hrs)

Applications

11 kV HT NSP Busway with cast resin insulators
PRODUCT 06

11 kV MV HT Busway (NSP & SPBD)

Medium-voltage busway distribution system for primary distribution at 11 kV (up to 33 kV on request). Available in Non-Segregated Phase (NSP) and Segregated Phase Bus Duct (SPBD) configurations, with cast epoxy resin insulators and SF6-free design.

Voltage
11 kV (Um)
BIL Impulse
75 kV peak
Short Circuit
120 kA / 3 s
Current Range
630 — 6300 A
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High-Voltage Test Specifications

Test ParameterSpecification
Power Frequency Withstand28 kV AC for 1 minute (phase-to-earth & phase-to-phase)
Lightning Impulse (BIL)75 kV peak (1.2/50 µs waveform), 5 +ve / 5 -ve shots
Partial Discharge≤ 10 pC at 1.1 × Um (12.1 kV)
Temperature Rise≤ 65 K above 40 °C ambient at rated current
Short-Time Withstand50 kA rms for 3 s (peak 120 kA)
Insulation ClassClass F (155 °C) cast resin insulators
Mechanical ShockTested per IEC 60068-2-29

Key Features

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