IEC 60112 Tracking Indices Test Machine
Product introduce
The IEC60112 Tracking Resistance Tester is a precision instrument
designed to evaluate the electrical insulation properties of
materials under wet and contaminated conditions. It complies with
key international standards such as IEC 60112:2020, UL 746A,
and ASTM D3638, measuring the Comparative Tracking Index (CTI)
and Proof Tracking Index (PTI) of insulating materials like
plastics, ceramics, and PCB substrates. The tester features
platinum electrodes, controlled droplet application (0.1% NH₄Cl
solution), and adjustable voltage (100-600V) to simulate real-world
electrical stress, ensuring reliable safety assessments for
electrical components, household appliances, and industrial
equipment.
Standard
1. Core standards
IEC 60112
The latest version is IEC 60112:2020 (corresponding to GB/T
4207-2022), which specifies the determination methods of the
tracking resistance index (PTI) and comparative tracking index
(CTI) of solid insulating materials, covering key technical
requirements such as electrode size, droplet parameters (such as
0.1% NH₄Cl solution), and voltage range (100-600V).
2. Related international standards
IEC 587 (inclined plate method)
It is used to evaluate the tracking resistance and corrosion of
insulating materials in harsh environments, which complements IEC
60112 (drop method).
UL 746A
American standard for leakage performance testing of plastic
materials, including tracking resistance requirements.
ASTM D 3638-92
American Society for Testing and Materials standard, involving the
test method for surface tracking of insulating materials.
DIN 53480
German standard, similar to IEC 60112 test principle, applicable to
the European market.
3. Other related standards
GB 4706.1-2008
Household appliance safety standard, citing IEC 60112 to test the
performance of insulating materials under humid conditions.
GB/T 6553-2003
Equivalent to IEC 587, for tracking resistance test of insulating
materials in harsh environments.
Note: The tester must meet the strict requirements of the above
standards for parameters such as electrodes (platinum material,
5mm×2mm), droplet control (30s/drop), and short-circuit current
(1.0A±0.1A).
Application
The test materials applicable to the IEC60112 tracking tester
mainly include the following categories:
1.Insulating materials: such as engineering plastics (PA66,
polyvinyl chloride PC, etc.), silicone rubber, cured materials and
insulators, etc., used to evaluate their tracking resistance under
the action of electric fields and electrolytes.
2.Electronic components: including printed circuit materials such
as PCB boards and aluminum substrates, testing their electrical
safety in humid and polluted environments.
3.Electrical components: covering insulating components of
household appliances, low-voltage electrical appliances, power
tools, motors and other products, ensuring that they meet safety
standards (such as GB 4706.1).
4.Industrial materials: such as insulating accessories of equipment
such as machine tool electrical appliances and safety busbars,
their long-term reliability needs to be verified by CTI/PTI index.
5.Other special materials: including non-metallic materials such as
glass and plastic films, which also need to be tested if used in
electrical insulation scenarios.
6.During testing, ensure that the material thickness is ≥3mm and
the surface is flat (size ≥15×15mm) to avoid deviations caused by
electrolyte loss or excessive heat dissipation.
Structural features:
1. The combustion box is painted; beautiful and
corrosion-resistant; all sample racks are made of stainless steel;
2. The equipment consists of a voltmeter, an ammeter, a time-delay
overcurrent relay, a power supply, a circuit control system, a
button switch, a signal light, etc.
3. The automatic dripping device includes a dripping cylinder, a
dripping nozzle, a counting device, a dripping counting device, a
dripping control device, a dripping volume measuring tool, etc.
4. The drip nozzle device is adjustable; the height is adjusted to
30-40mm; ensure that the dripping position is between the two
electrodes;
5. The electrode device includes a platinum electrode, an electrode
fixing device, a 4mm gauge, etc. The electrode is adjustable and
detachable;
6. The electrode is 5mm wide and 2mm thick, 99.9% pure platinum,
and has a 30~60 degree tip.
7. The pressure of the electrode on the sample is adjustable, the
adjustment range is (1.00N±0.001N); the electrode distance is
4.0mm±0.01mm, and the angle is 60°±5°;
8. Equipped with a sample table;
9. Equipped with a glass plate: thickness ≥4mm.
Safety control system:
1. Test voltage: 0~600V continuously adjustable digital display,
the maximum error of the voltage meter display value: 1%;
2. Short-circuit current: (1±0.1)?A, the voltage drop value does
not exceed 10%;
3. If the test current exceeds 0.5A for more than 2 seconds, the
system automatically shuts down the equipment;
4. Safety door control system, when the door is opened, the test
system cannot work;
5. Electrode: A pair of 5mm×2mm rectangular platinum electrodes and
brass electrodes, which meet the size requirements of IEC60112
Figure
B.1;
6. Electrode: The angle between the electrodes is 60°±5°, and the
spacing is (4±0.1mm);
7. Electrode: The pressure on the sample is: 1.00N±0.05N;
8. Dropping system: (30±1) seconds (opening dripping time 29.8S +
opening dripping duration 0.2S) automatic counting, digital display
(presettable), 50 drops time: (24.5±2)?min;
9. Dropping system: The height from the needle tip of a drop to the
sample surface: 35mm±5mm (with a gauge for reference);
10. Dropping system: Dropping weight: 2 0 drops: 0.380g~0.489g, 50
drops: 0.?997g~1.?147g; the number of drops can be set from 1 to
9999;
11. PLC and touch screen intelligent control system, test data is
automatically recorded, automatically stored, and can be freely
retrieved;
12. Using access control circuit, the test circuit cannot be
started when the door is opened.
Technical parameters:
| Electrode material | electrode head - platinum (platinum) |
| Electrode pressure | 1.0±0.05N |
| Electrode distance | 4.0mm ± 0.01mm, angle 60°±5 |
| Electrode voltage | 100~600V (48~60HZ) adjustable, voltage drop is less than 10% when
short-circuit current is 1.0±0.1A |
| Drop height | 30~40mm adjustable |
| Drop size | 44~55 drops/1cm3 adjustable |
| Drop time | 30s±5s |
| Number of drops | 0~999 times adjustable |
| Leakage judgment | If the loop current is greater than 0.5A and maintains for 2
seconds, the relay will cut off the current, indicating that the sample is unqualified |
| Test process | The test procedure is automatically controlled and the air is
independently exhausted |
| Reference standards | IEC 60112, GB/T 4207, GB 4706.1 |
| Equipment external dimensions | 1200mm wide × 600mm deep × 1300mm high |
Necessary accessories (provided by the customer):
1. Conductivity meter.
2. Electronic balance: accuracy 0.001g, range 200g.
3. Depth gauge: The diameter of the hemispherical end of the probe
is 1mm, the resolution is at least 0.1mm, and the accuracy is
±0.1mm.
