IEEE 1584 · Engineering

Power System Study & Analysis - Carelabz Hungary

Power system study and analysis solves the power flow equations that govern your electrical network, verifying that generators, lines, transformers, and shunt elements perform as intended, withstand expected stress, and are protected against failures. It draws together load flow analysis, short-circuit and fault analysis, and relay coordination into one connected picture of how a Hungarian facility's network behaves under normal operation and under fault conditions. Carelabs performs the full study in ETAP and delivers findings aligned with MSZ HD 60364.

Free Consultation

Check the design before it is built

Electrical designs are usually verified after commissioning, when every error is a change order. Modelling the design first moves that verification to the point where corrections are still free.

What We Deliver

Cable and device sizing verified

Proposed conductor sizes and protective devices are checked against calculated load, voltage drop and fault duty, which catches the sizing errors that otherwise surface as a failed inspection or an overheating circuit.

WHY IT MATTERS

Errors are cheapest on the drawing

A sizing error caught in the model costs a revision. The same error caught at commissioning costs a cable pull, a device change and a delay, and caught later still it costs an outage.

Design load established from a realistic diversity assessment rather than summed connected load, which oversizes everything downstream of it.
Fault level taken from the network operator for the proposed connection, since equipment ratings must be specified against the real figure.
Motor starting modelled where large drives are designed in, as starting dip can breach voltage limits a steady-state calculation passes.
Protective device selection checked for discrimination as a set, not device by device against its own circuit.
Earth fault loop impedance verified to the furthest point, because disconnection time depends on it and it is frequently assumed rather than calculated.

DELIVERABLES

What you receive

A design verification report against MSZ HD 60364 and IEC 60909, with every assumption stated so the design team can respond to it.

1Verified load schedule with the diversity basis stated
2Cable and protective device sizing check against load, volt drop and fault duty
3Fault duty per bus compared against the interrupting ratings specified
4Grading curves proving discrimination between the devices selected
5A register of design queries, each with the calculation that raised it

Reach Out

How the study runs

Establish the design intent

We work from the drawings, schedules and specification, and record what the design assumed so the verification tests those assumptions rather than replacing them.

Confirm the connection data

Fault level and supply characteristics are obtained from the network operator for the proposed connection point.

Build the designed network

The proposed installation is modelled in ETAP as designed, including every protective device with its selected characteristic.

Run the checks

Load flow, fault duty, volt drop, earth fault loop impedance and discrimination are all calculated against the design as drawn.

Raise queries with evidence

Each finding is issued with the calculation behind it, so the design team can act on a number rather than an opinion.

Re-verify the revision

Once the design is amended the affected checks are re-run, which closes the loop rather than leaving the correction unverified.

Frequently asked questions

Because design calculations are usually done circuit by circuit, while discrimination, fault duty and volt drop interact across the whole network. Independent modelling checks the installation as a system. It also tests the assumptions, particularly diversity and fault level, which are where design errors most commonly originate.

Once the single line diagram and load schedule are settled but before equipment is ordered. Earlier than that and the design is too fluid to verify usefully; later and the findings become change orders. The window where a correction is still a drawing revision is the valuable one.

The affected checks are re-run against the revision, which is quick once the model exists. That re-verification matters, because a correction made in response to one finding can create another, and an amended design that was never re-checked carries the same risk as one never checked at all.

Yes, and it is worth retaining. Once built, the as-designed model is updated to as-built and becomes the basis for arc flash assessment, future expansion and protection setting work. That avoids paying again for network data capture that has already been done once.

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