Design Tools

kW, kVA, kVAR and line current for single- and three-phase loads.

Used in L04–L06

Motor FLC and circuit sizing basis: calculated (IEC/IS) or NEC Table 430.250.

Used in L05, L52

Required kVA from demand, growth and loading, then the next standard rating.

Used in L17

Bolted three-phase fault current at the LV terminals from kVA and impedance.

Used in L63

ΔV and % drop against the profile's limits, with the smallest size that complies.

Used in L27

Full selection workflow: protective device, derated ampacity, voltage drop and short-circuit withstand.

Used in L24–L29

FLC, starter, overload and short-circuit protection, and a cable checked for running and starting voltage drop.

Used in L58–L60

Running-load and motor-starting checks, with an estimated transient voltage dip.

Used in L18

UPS rating from both the kVA and kW limits, plus first-pass battery capacity.

Used in L19

Capacitor kVAR for a PF target, harmonic resonance check, and capacitor switchgear sizing.

Used in L69–L70

Protective conductor size, earth-electrode resistance, TT limits and final-circuit disconnection length.

Used in L72–L75

Tray fill by area (IEC / IS practice) or NEC 392.22 rules, with the minimum tray width.

Used in L88

Impedance-method fault current at the LV bus and at a cable end, with motor contribution and peak current.

Used in L61–L65

Plot two devices' LSI time-current curves on log-log axes and find the selectivity limit.

Used in L46–L47

Enter loads by board: connected and maximum demand (C/I/S), PF combined correctly, incomer currents.

Used in L11–L16