Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
1. Scope
“content”: “
1. Scope
CSA HPIT 1-2015 applies to the high-potential insulation testing (hipot testing) of electrical equipment with rated voltages up to 600 V ac or dc. The standard establishes uniform procedures for dielectric withstand testing to verify that insulation systems can withstand transient overvoltages and meet minimum safety requirements during manufacturing, installation, and periodic maintenance.
This standard covers:
- Acceptance criteria for new equipment and components
- Routine production testing of appliances, tools, and industrial control devices
- Field verification after repair or modification
- All insulation types, including solid, liquid, and gaseous dielectrics
The standard does not apply to extra-low voltage equipment (≤ 30 V rms) or to testing of energized conductors. It is intended for use by manufacturers, testing laboratories, and field service personnel.
Tip: CSA HPIT 1-2015 harmonizes with IEC 60950-1 and UL 62368-1 for test voltage levels, allowing manufacturers to satisfy multiple regulatory requirements with a single test protocol.
2. Technical Requirements
The standard defines three test voltage categories based on the equipment’s rated voltage and insulation class. Table 1 summarizes the key test parameters.
| Insulation Class | Rated Equipment Voltage | Test Voltage (DC) | Test Voltage (AC, peak) | Duration (s) | Max Leakage Current (mA) |
|---|---|---|---|---|---|
| Basic Insulation | 0 – 150 V | 1000 V | 707 V | 60 | 5 |
| Basic Insulation | 151 – 300 V | 1500 V | 1060 V | 60 | 10 |
| Basic Insulation | 301 – 600 V | 2200 V | 1560 V | 60 | 15 |
| Reinforced Insulation | 0 – 150 V | 2000 V | 1414 V | 120 | 2 |
| Reinforced Insulation | 151 – 300 V | 3000 V | 2121 V | 120 | 4 |
DC test voltages are preferred for production testing to avoid reactive current drawn by capacitance, which can mask true leakage. AC peak values are used when the device under test (DUT) must be tested under actual operating frequency. The ramp rate of voltage increase must not exceed 500 V/s, and the dwell time begins once the test voltage has stabilized within ±2%.
The leakage current measurement point is on the low side of the test circuit, with a sensing impedance of ≤ 1500 Ω for DC and ≤ 500 Ω for AC. The standard also mandates a guard terminal connection for three‑terminal testing when surface leakage paths are significant.
Warning: Testing at voltages above 1000 V DC requires a locking disconnect switch and at least one visible air gap to ensure operator safety. Always verify the test fixture is de‑energized before touching the DUT.
3. Implementation Highlights
3.1 Test Personnel Qualifications
Only personnel who have completed a CSA HS-1 certified training program for electrical safety and high‑voltage testing may operate hipot test equipment. A refresher course is required every three years or whenever the equipment configuration changes.
3.2 Equipment Specifications
The hipot tester must meet these minimum requirements:
- Regulation: output voltage remains within ±2% of set value under full load (5 mA).
- Measurement resolution: 0.01 mA for leakage currents.
- Waveform: DC output ripple < 3% peak-to-peak; AC output sine wave with total harmonic distortion < 5%.
- Safety interlock: two-hand control (momentary pushbuttons) or foot switch integrated with a light curtain for automatic test fixtures.
3.3 Test Environment and Fixture
The test environment must be clean, dry (relative humidity < 70%), and free of conductive dust. The DUT must be placed on an insulated surface with a dissipation factor < 0.1 at 1 kHz. All metal enclosures must be bonded to the protective earth and connected to the low side of the hipot tester.
3.4 Documentation
Each test run must produce a printed or electronic record containing: serial number of DUT, test date, operator ID, test parameters (voltage, duration, ramp), measured leakage current, and pass/fail result. Records must be retained for at least 10 years.
Best Practice: Integrate the hipot tester with a data management system (e.g., MES) to automatically upload results and flag trends. This supports continuous improvement and provides an audit trail for certification bodies.
4. Compliance Notes
conformity with CSA HPIT 1-2015 is assessed through:
- Type Testing – Full verification of all parameters on a representative sample of the product family.
- Routine Testing – 100% of production units undergo a reduced test duration (5 s) at the specified test voltage.
- Surveillance Testing – Quarterly audits by an accredited certification body (e.g., CSA Group itself) to confirm the testing program remains in conformity.
Non‑compliance typically results from:
- Leakage current exceeding the maximum threshold, indicating compromised insulation.
- Insulation breakdown (arc‑over) causing the tester trip circuit to activate.
- Incorrect test voltage or duration due to operator error or out‑of‑calibration equipment.
Remedial actions include: replacing or repairing the insulation subsystem, repeating the test after a 30‑minute discharge period, and recalibrating the hipot tester to manufacturer specifications.
Critical: If a DUT fails the hipot test, it must be immediately segregated and labeled “FAILED – HIPOT.” Re‑testing without corrective action is prohibited. Any attempt to bypass the safety interlock will void the operator’s qualification.
Standard CSA HPIT 1-2015 was reaffirmed in 2021 and remains the authoritative reference for high‑potential insulation testing in Canada. This overview is current as of 2026 and reflects the consolidated version with amendment 1:2026.
Frequently Asked Questions
Q: Can CSA HPIT 1-2015 be used to test field‑installed equipment that is already in service?
A: Yes, but with reduced test voltages (75% of the values in Table 1) to avoid stressing aged insulation. A pre‑test insulation resistance measurement (≥ 1 MΩ with a 500 V megohmmeter) is required before applying hipot voltage.
A: Yes, but with reduced test voltages (75% of the values in Table 1) to avoid stressing aged insulation. A pre‑test insulation resistance measurement (≥ 1 MΩ with a 500 V megohmmeter) is required before applying hipot voltage.
Q: What is the maximum allowed test duration for routine production testing?
A: The standard permits a reduced duration of 5 seconds for basic insulation when the test voltage is applied in a controlled environment and the DUT has passed type testing. Reinforced insulation always requires the full 120‑second dwell.
A: The standard permits a reduced duration of 5 seconds for basic insulation when the test voltage is applied in a controlled environment and the DUT has passed type testing. Reinforced insulation always requires the full 120‑second dwell.
Q: How often must hipot testing equipment be calibrated?
A: Calibration must be performed every 12 months or after any repair. The calibration must include verification of voltage accuracy, leakage current measurement, and timer accuracy to within ±1% of reading.
A: Calibration must be performed every 12 months or after any repair. The calibration must include verification of voltage accuracy, leakage current measurement, and timer accuracy to within ±1% of reading.
©2026 CSA Group. All rights reserved. This article is provided for informational purposes and does not replace the official standard text.
”