Leakage Current Test Equipment
ED&D leakage current test equipment measures leakage current in laboratory, production, field, and medical electrical safety applications. The LT-15, LT-30HC, LT-601, LT-601HC, LT-952, and LT-952HC provide model-specific measurement networks, current capacities, and connection arrangements for product safety testing. The AVO-LT1 provides an isolated applied-voltage source for applicable test methods.
Front-Panel Controls
Front-panel controls and switching provide direct selection of the required leakage-current measurement path.
True RMS Measurement
The LT-952 and LT-952HC measure sinusoidal and non-sinusoidal leakage-current waveforms.
General and Medical Electrical Safety Testing
General-purpose and medical models provide different measurement paths and measuring networks for the applicable test method.
Provide the applicable standard, DUT current requirement, required measurement paths, and whether True RMS or an applied-voltage source is needed.
Leakage Current Testing for Electrical Safety Programs
A leakage current tester measures current flowing from the product under test through specified measurement paths, such as protective earth, accessible conductive parts, or patient connections, depending on the product category, measuring network, and applicable safety standard. These instruments are commonly used in electrical safety laboratories, production quality testing, field verification, and medical device test programs.
Depending on the model, available functions include product-ground switching, automatic receptacle disconnect in 240 V mode, universal receptacle connections, and True RMS measurement.
The product family includes general-purpose testers, medical electrical safety models with patient-related measurement paths, and an applied-voltage option for test methods requiring an isolated source.
Applicable standards and measurement-network information are identified within each product section. Final instrument selection depends on the exact measurement network, DUT current, connection method, and test procedure required by the governing standard.
LT-15 Digital Leakage Current Tester
The ED&D LT-15 is a digital leakage current tester designed for laboratory, production-line, and field testing where leakage-current measurements required by product safety test procedures are performed. It is configured for 100–120 / 200–240 VAC operation at 15 A and supports multiple leakage current measurement paths.
Product Details
- Input / output ratings: 100–120 / 200–240 VAC, 15 A, 50–60 Hz
- Testing tolerance: 90–132 / 180–264 VAC
- Leakage current can be measured through the product power cord ground conductor
- Leakage current can be measured from surface-to-line / line-to-line or ground / surface-to-surface, depending on setup
- Features product ground switching when not measuring leakage
- Automatic front receptacle disconnect when configured in 240V mode
- 3.5 in. digital LCD display
Standards note: verify that the LT-15 measuring network, voltage rating, current capacity, and switching arrangement satisfy the exact requirements of the applicable product safety standard.
LT-15 Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Input / Output Ratings | 100–120 / 200–240 VAC, 15 A, 50–60 Hz | Dimensions | 13.25 in. W x 11.5 in. D x 5.5 in. H |
| Testing Tolerance | 90–132 / 180–264 VAC | Weight | 9 lbs. |
| Measurement Ranges | 2 mA / 1.0 µA resolution; 20 mA / 10.0 µA resolution | Accuracy | ±1% full scale |
| Measuring Network | 1500 Ω shunted by 0.15 µF | Display | 3.5 in. digital LCD display |
LT-30HC Digital Leakage Current Tester
The ED&D LT-30HC uses the same general leakage-current measurement approach as the LT-15 while increasing DUT supply capacity from 15 A to 30 A. It is configured for 100–120 / 200–240 VAC operation.
LT-30HC Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Input / Output Ratings | 100–120 / 200–240 VAC, 30 A, 50–60 Hz | Dimensions | 13.25 in. W x 11.5 in. D x 5.5 in. H |
| Testing Tolerance | 90–132 / 180–264 VAC | Weight | 13 lbs. |
| Measurement Ranges | 2 mA / 1.0 µA resolution; 20 mA / 10.0 µA resolution | Accuracy | ±1% full scale |
| Measuring Network | 1500 Ω shunted by 0.15 µF | Display | 3.5 in. digital LCD display |
LT-601 and LT-601HC Digital Leakage Current Testers
The ED&D LT-601 and LT-601HC are digital leakage current testers intended for medical electrical safety testing. These models support switching for measurements made through the product power cord ground conductor, from accessible-surface-to-ground, patient-connection-to-ground, and between patient connections.
Product Details
- Designed for medical electrical safety leakage-current measurements
- Front-panel switch permits multiple leakage current measurement paths
- Measures through the product’s power cord ground conductor
- Measures leakage current from accessible surfaces to ground
- Measures patient-connection leakage current to ground
- Measures leakage current between patient connections
- 3.5 in. digital LCD display
Standard referenced for this model family: IEC 60601.
Measuring network: configured in accordance with IEC 60601, EN 60601, CSA 601, and UL 2601.
Use note: for medical leakage current testing, the selected measurement path must match the exact test method required by the applicable edition of the governing medical safety standard or lab procedure.
LT-601 / LT-601HC Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| LT-601 Input Ratings | 100–120 / 200–240 VAC, 15 A, 50–60 Hz | Size | 13.25 in. W x 11.5 in. D x 5.5 in. H |
| LT-601HC Input Ratings | 100–120 / 200–240 VAC, 30 A, 50–60 Hz | Weight | LT-601: 9 lbs. / LT-601HC: 13 lbs. |
| Testing Tolerance | 90–132 / 180–264 VAC | Measurement Ranges | 200 µA / 1.0 µA resolution; 2000 µA / 10.0 µA resolution; ±1% full-scale accuracy |
| Output Ratings | Same as input ratings | Measuring Networks | Network in accordance with IEC 60601, EN 60601, CSA 601, UL 2601 |
| Display | 3.5 in. digital LCD display |
LT-952 and LT-952HC Digital Leakage Current Testers
The ED&D LT-952 and LT-952HC are digital leakage current testers for general product safety testing. These models provide a universal rear receptacle and True RMS measurement.
Product Details
- True RMS leakage-current measurement
- Universal rear panel receptacle allows testing products with a wide range of plug configurations
- Measures sinusoidal and non-sinusoidal waveforms
- Important for products using switch-mode power supplies that can generate non-sinusoidal leakage currents
- Lightweight enclosure with integral handle
- 3.5 in. digital LCD display
Standards referenced for this model family: IEC 60335, IEC 60950, IEC 61010, UL 60950, CSA 950, and EN 61010.
Measuring networks: measuring network for IEC 60950 2nd edition, IEC 61010, IEC 60335, IEC 60065, and related standards.
Legacy standards note: IEC 60950, UL 60950, and CSA 950 are older standards references, but they remain relevant for legacy products, historical test methods, and existing compliance documentation.
LT-952 / LT-952HC Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| LT-952 Input Ratings | 100–120 / 200–240 VAC, 15 A, 50–60 Hz | Mechanical Size | 13.25 in. W x 11.5 in. D x 5.5 in. H |
| LT-952HC Input Ratings | 100–120 / 200–240 VAC, 30 A, 50–60 Hz | Weight | LT-952: 9 lbs. / LT-952HC: 13 lbs. |
| Testing Tolerance | 90–132 / 180–264 VAC | Measurement Ranges | 2 mA / 1.0 µA resolution; 20 mA / 10.0 µA resolution; ±1% full-scale accuracy |
| Output Ratings | Same as input ratings | Measuring Networks | Body circuit for IEC 60950 2nd edition, IEC 61010, IEC 60335, IEC 60065, and related standards |
| Display | 3.5 in. digital LCD display |
AVO-LT1 Applied Voltage Option
The ED&D AVO-LT1 is an applied voltage option for specialized leakage-current test methods.
Product Details
- Custom-designed low-capacitance transformer provides high isolation
- Safety features include line isolation, applied-voltage warning lamp, safety banana jacks, and output current limiter
- Input and output voltage ranges from 90–264 VAC without changing a range switch
- Separate output jacks provided for connecting an external output monitoring meter
Standard referenced for this option: IEC 60601.
Use note: the AVO-LT1 is not a general-purpose leakage current tester by itself. It is an applied-voltage accessory option for procedures that specifically require this isolated source arrangement.
AVO-LT1 Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Input Ratings | 100–240 VAC less than 0.1 A, 50/60 Hz | Isolation Method | Low leakage custom-designed transformer |
| Output Voltage | 1:1 isolation of input voltage | Size | 6-1/8 in. W x 3-1/4 in. H x 6-1/4 in. D |
| Current | 5 mA max. @ 240 VAC | Weight | 2 lbs. (1 Kg) |
| Impedance | 47 Kohm |
Leakage Current Testing Accessories
Accessories are available for DUT connection, replacement power cords, daily functional verification, and compatible leakage current testers.
LT Low Current Power Cord
The LT Low Current Power Cord is a 15 A power cord for compatible leakage current testers.
LT High Current Power Cord
The LT High Current Power Cord is a 30 A power cord for compatible leakage current testers.
LT Test Lead Kit
The LT Test Lead Kit is a lead set for connection to the front-panel banana jacks when measuring leakage between surfaces or other specified test points.
LT Accessory Plug
The LT Accessory Plug is a device-under-test replacement plug for the LT-30HC.
Check-MATE LT
The Check-MATE LT is a functional-verification load box for compatible leakage current testers. It connects to the tester’s front-panel DUT connection and provides selectable leakage-current values so the operator can confirm that the meter responds within the expected limits under different line polarity and neutral-switch conditions.
Ordering note: verify connector style, current rating, and model compatibility before ordering power cords, plugs, lead kits, or verification accessories.
Leakage Current Tester Comparison
| Model | Primary Use | Typical Current Capacity | Relevant Features |
|---|---|---|---|
| LT-15 | General leakage-current testing | 15 A | 15 A general-purpose model |
| LT-30HC | General leakage-current testing | 30 A | 30 A general-purpose model |
| LT-601 / LT-601HC | Medical electrical safety testing | 15 A / 30 A | Supports protective-earth, accessible-surface-to-ground, patient-connection-to-ground, and patient-to-patient measurement paths |
| LT-952 / LT-952HC | General product safety testing | 15 A / 30 A | True RMS measurement and universal receptacle support |
| AVO-LT1 | Applied voltage accessory option | Accessory device | Provides isolated applied-voltage capability for IEC 60601-related test methods |
Frequently Asked Questions
What does a leakage current tester do?
A leakage current tester measures current flowing from the product under test through specified paths, such as protective earth, accessible conductive parts, or patient connections, depending on the applicable standard and test setup.
Why is True RMS important for leakage current testing?
True RMS is important when testing products that can generate non-sinusoidal leakage current waveforms, such as products using switch-mode power supplies.
What is the difference between the LT-15 and LT-30HC?
Both are general-purpose leakage current testers, but the LT-15 is rated for 15 A and the LT-30HC is rated for 30 A DUT current capacity.
Which models are intended for medical leakage current testing?
The LT-601 and LT-601HC are the medical electrical safety models in this family and provide protective-earth, accessible-surface-to-ground, patient-connection-to-ground, and patient-to-patient measurement paths.
Are IEC 60950 and UL 60950 still relevant?
Yes, as legacy standards references. They are still relevant for older products, historical compliance files, and established laboratory methods.
Why choose the LT-952 instead of the LT-15?
Choose the LT-952 when the test requires True RMS measurement or a universal rear receptacle. The LT-15 provides the general LT measurement configuration without those LT-952 features.
Tell us whether you need general product safety testing, medical leakage current capability, higher current capacity, or an applied-voltage option.
Typical Leakage Current Testing Applications
- Leakage-current testing in electrical safety laboratories
- Production-line verification and troubleshooting
- Field measurements and troubleshooting
- Programs associated with IEC 60335 for household and similar products
- Programs associated with IEC 61010 for lab and industrial equipment
- Legacy programs associated with IEC 60950 and UL 60950
- Medical electrical safety testing associated with IEC 60601
- Accessible-surface-to-ground, patient-connection-to-ground, and patient-to-patient measurements on applicable models
- Applied-voltage test methods using the AVO-LT1 option