NMX‑HVT‑800 / Rev 00 / IEC 60060 / 60270 / AC · DC · impulse 2026 · Product Page

NMX-HVT-800 · ENGINEERED TO ORDER — HIGH-VOLTAGE TEST BENCHES & LABS

Stress the insulation. Prove it holds.

Name: High-Voltage Test Bench / Laboratory
Brand: Neometrix

A turnkey high-voltage test bench that proves the insulation of power apparatus — AC and DC withstand, lightning impulse and partial discharge on transformers, switchgear, insulators, bushings and cables, to IEC 60060 and IEC 60270. Representative to ~800 kV, impulse into the MV range. The engineering that matters is the HV safety and the measurement — not the source, which is bought in. Engineered to order — no specific delivered laboratory is claimed on this page.

Enquire — HV test bench Capability sheet (PDF)

Illustrative image, not a delivered installation — a high-voltage test hall with a tall high-voltage test transformer and an impulse-generator column, a test object connected by high-voltage leads with corona grading rings, and an earthed safety cage, in a clean high-bay laboratory

Fig · 01 Sources, test object and measurement behind an earthed cage — a high-voltage test bay — illustrative, not a delivered installation

Withstand

AC/DCapplied

Impulse

1.2/50µs

pCIEC 60270

Dielectric

tan δ+ C

Class

800kV / MV imp.

ISO 9001 / 14001 Engineered to order HV safety & earthing IEC 60060 & 60270 Noida · India

Overview

Prove the insulation before it goes on the grid.

A transformer, a switchgear panel or a cable is only as good as the insulation that keeps its high voltage where it belongs. Before it is energised for real, that insulation is deliberately stressed — above its rated voltage, and with a simulated lightning strike — and watched to see that it holds and that it is free of the small internal discharges that predict failure.

Illustrative image, not a delivered installation — a high-voltage impulse (Marx) generator: a tall vertical column of stacked capacitors, resistors and spark gaps in an open frame in a high-bay hall, no text and no people

Fig · 02 An impulse (Marx) generator — the column that makes a 1.2/50 µs lightning impulse — illustrative, not a delivered installation

High-voltage testing is a safety discipline first. The hard, defining engineering is not the voltage source — it is applying and removing a lethal voltage safely: the earthed test cage, door interlocks, automatic earthing and discharge sticks, air clearances and screening. Everything else is built around that.

Measuring at high voltage is the other hard half. You read kilovolts to megavolts with a voltage divider, and you catch partial discharge in picocoulombs against electrical noise — so the measurement chain and the screening around it are as engineered as the source itself.

Two numbers decide it. Did the insulation withstand the applied AC, DC and impulse without breaking down — and how much partial discharge and dielectric loss does it show? One is pass/fail; the other is the early warning.

You cannot see insulation failing. So you provoke it — safely, above rated voltage — and measure the faint signs, before the grid does it for you at three in the morning.

The Test-Lab Franchise

One more lab, one more discipline

A high-voltage lab is the HV member of the same test-laboratory family as our EMI/EMC laboratory and our EV, e-motor and charger test systems — the competence to lay out, safety-engineer, instrument and commission a test facility, applied to high voltage.

Safety + Measurement

Where the engineering actually is

The lethal-voltage safety envelope — cage, interlocks, earthing, clearances — and the measurement of kV and picocoulombs against noise. That, not the transformer, is what makes an HV lab trustworthy.

Honest on Sourcing

We integrate; the sources are specialist

The HV test transformer, impulse generator, PD detector and dividers are bought-in; Neometrix engineers the lab — layout, safety, earthing, screening, controls and measurement integration. No delivered laboratory is claimed on this page.

Architecture

Apply, withstand, measure.

The schematic shows the three high-voltage sources, the test object, and the measurement that grades it — all inside the safety envelope — and the detail panel explains what each test proves.

FIG · 03HV TEST-BENCH ARCHITECTURE · AC / DC / IMPULSE SOURCES · TEST OBJECT · MEASUREMENT · SAFETY

Fig · 03 AC, DC and lightning-impulse voltage applied behind an earthed cage; withstand, partial discharge and dielectric loss measured out

Arc · 01

The HV Sources

An AC test transformer or resonant set for power-frequency withstand and induced tests, a DC set for DC withstand, and an impulse (Marx) generator for the 1.2/50 µs lightning impulse and switching impulses that prove the basic insulation level — the specialist, bought-in heart of the bench.

Arc · 02

The Test Object

A power, distribution or instrument transformer, a switchgear panel or GIS bay, an insulator, bushing, cable or surge arrester — connected by graded HV leads with corona rings, for type, routine or acceptance tests to its apparatus standard.

Arc · 03

The Measurement

A calibrated voltage divider reads kV to MV, a partial-discharge detector catches discharges in picocoulombs to IEC 60270, and tan δ and capacitance read dielectric loss — the numbers that grade the insulation, screened against noise.

Arc · 04

Safety & Control

The earthed test cage, door interlocks, automatic earthing and discharge sticks, air clearances and screening — the lethal-voltage safety envelope — with a control desk that applies, holds and removes voltage to a defined sequence and logs every test.

Have a high-voltage test bench, transformer / switchgear test or HV-lab requirement? Send the apparatus, the voltage class and the test standard — a clause-by-clause compliance matrix within two working days · [email protected]

Send tender spec

Specifications

Reference lab, sized to your apparatus.

The parameters below describe a reference high-voltage test bench. Voltage classes, the source ratings, the measurement suite and the lab layout follow from the apparatus, its rated voltage and the standard it is tested against — a transformer bay, a switchgear bench or a cable test set.

Illustrative image, not a delivered installation — the control and measurement room of a high-voltage laboratory: a control desk and racks of measurement instruments including an impulse analyser and a partial-discharge detector with plain dark screens, behind a screened wall, no text and no people

Fig · 04 The control & measurement room — where kV and picocoulombs are read and the sequence is run — illustrative, not a delivered installation

Where HV testing goes wrong

In the safety and the measurement, not the source. An earthing or interlock designed as an afterthought turns a routine test into a lethal hazard; a discharge stick that does not prove the object is dead leaves stored charge waiting for the next person; a partial-discharge chain without proper screening reads the room’s electrical noise instead of the defect inside the insulation, and passes a bad transformer.

That is why the lab is built safety-first — earthed cage, interlocks, automatic earthing, clearances — and why the measurement is screened, calibrated and traceable. A high-voltage test is only worth the confidence you can place in the number, and the safety of the people who took it.

Full specification — expand

Bench / Lab	High-voltage test bench / laboratory — turnkey: layout & clearances, HV sources integration, safety enclosure & interlocks, earthing & discharge, screening, measurement, controls, installation, commissioning and acceptance
Duty	HV dielectric / insulation testing of transformers, switchgear, insulators, bushings, cables, surge arresters, CTs/PTs — type, routine and acceptance tests
AC Withstand	Power-frequency applied and induced-voltage withstand via an HV test transformer / resonant set
DC Withstand	DC high-voltage withstand and leakage-current measurement
Impulse	Lightning impulse (1.2/50 µs) and switching impulse via an impulse (Marx) generator — basic insulation level (BIL)
Partial Discharge	PD measurement in picocoulombs to IEC 60270 — inception and level, the insulation-defect screen
Dielectric	Dissipation factor (tan δ) and capacitance · insulation resistance
Voltage	Representative up to ~800 kV class AC and impulse into the MV range · scaled to the apparatus
Safety	Earthed test cage / enclosure · door interlocks · automatic earthing & discharge sticks · air clearances · screening & area protection
Standards	IEC 60060 (HV test techniques) · IEC 60270 (PD) · IS 2071 · apparatus standards (IEC 60076, 62271, 60137)
Sourcing	HV test transformer, impulse generator, PD detector, dividers and measuring instruments are bought-in specialist items; Neometrix engineers and integrates the bench / lab, its safety and controls
Status	Engineered to order · turnkey · quoted across high-voltage test-bench requirements · no specific delivered laboratory is claimed on this page

PDF · 1 page

High-Voltage Test Bench — Capability Sheet

Tender Response

Send your apparatus & test standard — compliance matrix in two working days

Variants

One discipline, four benches.

Tenders call it a high-voltage test bench, an HV test lab, an impulse voltage test system or a transformer / switchgear test bay. The discipline — apply high voltage safely, measure honestly — is common to all.

Var · 01

Power-Transformer Test Bay

The reference bay — applied and induced AC, DC, lightning impulse and PD on a power or distribution transformer, with the source ratings and clearances sized to its voltage class.

Var · 02

Switchgear / GIS Test Bench

Power-frequency and impulse withstand plus PD for air- and gas-insulated switchgear and panels — with the fixturing, clearances and interlocks a switchgear routine test demands.

Var · 03

Insulator, Bushing & Cable Set

A HV test set for insulators, bushings, HV cables and accessories and surge arresters — wet and dry withstand, impulse and PD, for component makers and test houses.

Var · 04

Impulse Generator & PD System

The impulse (Marx) generator, divider and impulse analyser, and the partial-discharge measurement system — to add lightning-impulse and PD capability to an existing HV bench.

Applications

Where it applies.

Wherever electrical apparatus has to prove its insulation before it is trusted with high voltage — on the production line, or in a test house.

A · 01Transformer manufacturers — routine & type test bays

A · 02Switchgear & GIS makers — power-frequency & impulse withstand

A · 03Insulator, bushing & cable makers — dielectric & PD testing

A · 04Surge-arrester & CT / PT makers — withstand & impulse

A · 05National & NABL test houses — independent HV qualification

A · 06Utility & research HV laboratories — acceptance & study

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 What does a high-voltage test actually prove?

Two things: that the insulation withstands, and that it is healthy. First the apparatus is held at a voltage above its rated level — power-frequency AC, DC, and a simulated lightning impulse — and if the insulation does not break down or flash over, it has passed the withstand test that proves it is safe at its working voltage with margin. But withstand alone can pass a part that is quietly deteriorating, so the test also measures partial discharge — tiny electrical discharges inside voids or at defects, measured in picocoulombs — and the dielectric loss (tan δ), which rises as insulation ages or absorbs moisture. Together they answer the real question a utility or a maker has: will this transformer, cable or switchgear survive years of service and the occasional lightning surge, or is there a defect that will fail it early? The bench provokes the answer safely, in a few hours, rather than waiting for the grid to find out.

Q · 02 Why do you say the safety is the real engineering, not the voltage source?

Because the source can be bought, but the safety has to be engineered for your lab, and it is what keeps people alive. A high-voltage bench applies a lethal voltage; the moment it is energised, the test area is a hazard, and stored charge can remain dangerous after the source is switched off. So the defining work is the safety envelope: an earthed test cage or enclosure that no one can enter live, door interlocks that dump the voltage if a gate opens, automatic earthing and discharge sticks that prove the object is dead before anyone approaches, the right air clearances for the voltage, and area protection and warning systems around it. Get any of that wrong and no amount of accuracy in the source matters. The HV transformer and the impulse generator are specialist bought-in instruments; laying out the lab, engineering that safety, earthing it properly and integrating the interlocks and controls is the work that makes it a facility rather than a hazard.

Q · 03 Is this the same “impulse” as your impulse and pressure test rigs?

No — it is a different kind of impulse entirely, and the shared word causes real confusion. On this bench, an impulse is electrical: an impulse or Marx generator produces a 1.2/50 µs high-voltage surge that reproduces a lightning strike, to prove the dielectric strength (the basic insulation level) of transformers, switchgear and insulators. Our impulse and pressure test rigs elsewhere in the range do something mechanical and completely separate: they apply repeated hydraulic pressure pulses to hoses, tubes and components to prove their fatigue life. One stresses insulation with voltage; the other stresses metal and elastomer with pressure. If your requirement uses the word “impulse”, the first question we ask is which one you mean — a lightning voltage impulse, or a pressure impulse — because they are different machines for different jobs.

Q · 04 How is a high-voltage test bench different from your EMI/EMC laboratory?

They test different things at different voltages. An EMI/EMC laboratory checks electromagnetic compatibility — whether a product emits too much electromagnetic interference, and whether it keeps working when subjected to interference, including fast transient and surge immunity pulses that are typically a few kilovolts, applied to prove a product tolerates disturbances from its environment. A high-voltage test bench does something else: it applies very high voltage — tens to hundreds of kilovolts, and impulse into the megavolt range — directly to power apparatus to prove the dielectric strength of its insulation and to measure partial discharge and dielectric loss. Put simply: EMC asks “does this device behave in a noisy electromagnetic world?”; HV testing asks “will this transformer’s insulation hold back its own high voltage?”. Both are test-laboratory disciplines we build, but they are separate facilities with separate standards — IEC 61000 for EMC, IEC 60060 and 60270 for high voltage.

Q · 05 What is partial discharge, and why measure it?

Partial discharge is the early warning of insulation failure. Inside solid or liquid insulation, a tiny void, a contaminant or a sharp edge can cause a small localised electrical discharge that does not yet bridge the whole gap — it “partially” discharges — but every one of those little sparks erodes the insulation a little more, so a part that shows significant PD today is a part that will fail in service tomorrow. It is measured in picocoulombs, which is an extraordinarily small charge, so the real difficulty is separating the genuine discharge inside the apparatus from the electrical noise of the surrounding environment — which is why the measurement chain, the screening and the earthing matter as much as the detector. A withstand test alone can pass a part that is discharging internally; adding a PD measurement to IEC 60270 catches the defect before it becomes a breakdown. For a maker it is a quality screen on every unit; for a utility it is how you accept apparatus that has to last decades.

Q · 06 Do you build the whole lab, or integrate bought-in HV sources?

We engineer the laboratory and integrate specialist high-voltage sources — and we are clear about the split. The HV test transformer or resonant set, the DC set, the impulse (Marx) generator, the partial-discharge detector, the voltage dividers and the measuring instruments are proprietary items from established makers, chosen for the voltage class and the standard. What Neometrix designs and delivers is everything that turns them into a working, safe test bench: the lab layout and air clearances, the earthed safety enclosure, interlocks, earthing and discharge system, the screening, the controls and the measurement integration, and the installation, commissioning and acceptance. It draws on the same test-laboratory integration competence behind our EMI/EMC laboratory and our EV, e-motor and charger test systems. To be plain about status: this capability is offered turnkey and quoted against high-voltage test-bench requirements; no specific delivered laboratory is claimed on this page.

↗

The test-lab line from Neometrix.

The same test-laboratory integration competence, in its other forms — electromagnetic, e-mobility and electrical — engineered at our Noida facility.

↗ Electromagnetic

EMI / EMC Test Laboratory

Emissions & immunity — electromagnetic compatibility, the sister discipline.

↗ E-Mobility

EV Charger Test System

Electrical test-system integration for EV charging — a test-lab sibling.

↗ Drives

E-Motor Test Bench

Instrumented electrical test bench for electric motors — same house.

Browse all Neometrix product lines.

Get a quotation

Send your apparatus
and test standard.

The Projects desk replies within two working days with a clause-by-clause compliance matrix and a budgetary quotation. Write to [email protected] or use the form.

Enquire — HV test bench Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 ENGINEERED TO ORDER — HIGH-VOLTAGE TEST BENCHES & LABS AC · DC · IMPULSE 1.2/50 µs · PARTIAL DISCHARGE · TAN δ · IEC 60060 / 60270 ENGINEERED IN NOIDA · INDIA

Stress the insulation. Prove it holds.

Prove the insulation before it goes on the grid.

One more lab, one more discipline

Where the engineering actually is

We integrate; the sources are specialist

Apply, withstand, measure.

The HV Sources

The Test Object

The Measurement

Safety & Control

Reference lab, sized to your apparatus.

Where HV testing goes wrong

One discipline, four benches.

Power-Transformer Test Bay

Switchgear / GIS Test Bench

Insulator, Bushing & Cable Set

Impulse Generator & PD System

Where it applies.

Common questions.

The test-lab line from Neometrix.

EMI / EMC Test Laboratory

EV Charger Test System

E-Motor Test Bench

Send your apparatus
and test standard.

Similar Products

Share This Page

Stress the insulation. Prove it holds.

Prove the insulation before it goes on the grid.

One more lab, one more discipline

Where the engineering actually is

We integrate; the sources are specialist

Apply, withstand, measure.

The HV Sources

The Test Object

The Measurement

Safety & Control

Reference lab, sized to your apparatus.

Where HV testing goes wrong

One discipline, four benches.

Power-Transformer Test Bay

Switchgear / GIS Test Bench

Insulator, Bushing & Cable Set

Impulse Generator & PD System

Where it applies.

Common questions.

The test-lab line from Neometrix.

EMI / EMC Test Laboratory

EV Charger Test System

E-Motor Test Bench

Send your apparatusand test standard.

Similar Products

Share This Page

Send your apparatus
and test standard.