GW Instek GPT Safety Testers: Hipot and Insulation…

Why Safety Testing Matters

Every electrical product sold in India must comply with safety standards, BIS (Bureau of Indian Standards) for domestic sale, CE marking for European export, UL for North American markets. At the core of these standards is dielectric withstand testing (commonly called hipot testing): applying a high voltage between live conductors and accessible metal parts to verify that the insulation will not break down under fault conditions.

A product that passes hipot testing demonstrates that its insulation can withstand voltage stress beyond normal operating conditions, providing the margin of safety that prevents electric shock in the field.

The GPT Family

GW Instek’s GPT series spans five product lines, each optimized for different test scenarios:

GPT-9500 Series: Multi-Channel Production Hipot

The GPT-9500 combines AC withstanding voltage, DC withstanding voltage, and insulation resistance testing in a single 3-in-1 instrument with a built-in 8-channel scanner. The scanner eliminates external switching matrices when testing multi-terminal products, transformers, motors, multi-output power supplies, reducing test cycle time and operator intervention.

150 VA AC capacity
3-in-1 testing: AC hipot, DC hipot, insulation resistance
Built-in 8-channel scanner
ARC detection for insulation breakdown screening
Open/Short Check (OSC) for test lead verification

GPT-9600 Series: Withstand and Insulation Resistance

The GPT-9600 provides AC/DC withstand voltage and insulation resistance testing in a streamlined form factor. It is suited for production lines where multi-channel scanning is not required but reliable hipot and IR testing is essential.

GPT-9800 Series: Safety Tester

The GPT-9800/9900 series is a general-purpose safety tester supporting AC/DC hipot, insulation resistance, and ground bond testing. The ground bond test verifies the integrity of the protective earth connection, a critical safety requirement for Class I (grounded) appliances and equipment.

GPT-12000 Series: 200 VA Production Safety Tester

The GPT-12000 steps up to 200 VA AC capacity, providing more power for testing products with higher capacitive loads, such as motor windings, large transformers, and equipment with EMI filter capacitors that present a capacitive load to the hipot tester.

GPT-15000: 500 VA Safety Analyzer

The GPT-15000 is the flagship of the GPT family: a 500 VA electrical safety analyzer that combines AC/DC dielectric withstand, insulation resistance, and ground bond testing in a single instrument. It is the first GW Instek safety tester compliant with IEC 61010-2-034.

500 VA AC capacity for high-capacitance DUTs
7-inch color display with graphical waveform view
AC/DC hipot + IR + ground bond in one instrument
IEC 61010-2-034 compliance
Evidence trails for UL, CE, and BIS certification documentation

Choosing the Right GPT Model

The selection depends on the DUT and production environment:

Requirement	Recommended Model
Multi-terminal products (transformers, motors)	GPT-9500 (8-ch scanner)
Basic hipot + IR on production line	GPT-9600
Hipot + ground bond for Class I appliances	GPT-9800/9900
High-capacitance DUTs (motors, EMI filters)	GPT-12000 (200 VA)
Full safety analysis with documentation	GPT-15000 (500 VA)

Indian Manufacturing Context

India’s electronics and electrical equipment manufacturing sector, spanning consumer appliances, industrial switchgear, transformers, UPS systems, LED drivers, and EV chargers, requires safety testing at every production stage. BIS certification (IS 616 for household appliances, IS 302 for particular requirements, IS 13252 for IT equipment) mandates dielectric withstand testing as part of the type test and routine test requirements.

For manufacturers in Bengaluru, Pune, Chennai, Hyderabad, Mumbai, and Delhi NCR, having a reliable hipot tester on the production line is not optional, it is a regulatory requirement.

The GPT series provides a range of options from the GPT-9600 for basic compliance to the GPT-15000 for full safety analysis with documentation trails that auditors and certification bodies require.

Availability Through GSAS

GSAS Micro Systems provides the complete GPT safety tester range in India as the authorized GW Instek partner. Services include test station configuration, scanner setup for multi-terminal DUTs, calibration coordination, and integration with production line automation.

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