KR‑727A 600V Comparative Tracking Index Tester
Product Details：
Product Overview
The KR‑727A tracking‑resistance index testing apparatus is a dedicated safety‑performance lab instrument built to measure Comparative Tracking Index (CTI) and Proof Tracking Index (PTI) for solid‑state electrical insulating substrates. It simulates real‑world harsh operating conditions combining high‑voltage stress, surface moisture and contaminant electrolyte droplets.
Under controlled test circumstances, two electrodes apply preset AC voltage onto the specimen surface, while standard polluting electrolyte solution drips at fixed intervals. The unit monitors leakage‑current changes continuously, identifying the voltage threshold where conductive tracking paths emerge on the insulator surface. These test results help engineers assess anti‑tracking safety of plastic, composite and ceramic insulating parts, preventing potential risks of creepage short‑circuit, arcing ignition and electrical‑equipment failure. This PLC‑touch‑screen operated device complies with IEC 60112, GB/T 4207‑2022 and relevant domestic electrical‑material evaluation specifications, widely deployed in electrical‑appliance factories, polymer‑material labs, wire‑cable manufacturers and third‑party safety‑certification institutes.
Core Product Competitive Advantages
- PLC‑Touch‑Screen Integrated Intelligent Control System
Colour touch‑screen human‑machine interface works together with PLC logic controller. Operators configure test voltage, droplet interval, total droplet quantity and protection‑current threshold directly on screen. Historical test parameters can be saved and recalled; test‑run data supports viewing and export, minimising manual‑setup mistakes during repeated batch‑testing.
- High‑Precision Peristaltic‑Pump Dropping Mechanism
Adopt high‑stability peristaltic pump to deliver contaminant electrolyte. Droplet volume, dripping height and time‑interval can be precisely adjusted to fully satisfy standard requirements. Stable liquid‑delivery avoids deviation caused by manual liquid‑supply and guarantees repeatability across multiple specimen groups.
- Standard‑Compliant Platinum‑Tip Electrode Assembly
Test electrodes feature platinum working tips paired with copper‑alloy electrode rods. Electrode dimension, contact pressure (1.0 N ± 0.05 N) and 4 mm electrode‑gap strictly follow IEC 60112 dimensional rules. Replaceable electrode tips simplify maintenance when platinum tips suffer erosion after long‑time test cycles.
- Complete Protection Logic & Observation‑Friendly Test Chamber
Transparent front observation window allows real‑time visual monitoring of specimen surface tracking phenomenon during running tests. Built‑in failure‑judgement circuit triggers auto‑stop once leakage‑current exceeds 0.5 A and lasts for 2 seconds. Over‑voltage, short‑circuit and earth‑leakage safety interlocks are embedded for operator‑and‑equipment protection. Internal exhaust structure removes corrosive test fumes out of cabinet.
- Robust Cabinet Structure with Fine‑Tunable Mechanical Platform
Machine shell adopts anti‑corrosion baking‑coated cold‑rolled steel plates. The internal specimen mounting platform supports fine‑position adjustment, making sample‑alignment quick and convenient. Adjustable levelling feet stabilise whole unit on uneven lab bench surfaces.
Complete Technical Parameter Table
| Parameter Item | KR‑727A Standard Specification |
|---|---|
| Supported Test Items | CTI (Comparative Tracking Index), PTI (Proof Tracking Index) |
| Test Voltage Range | 100 V‑600 V, adjustable in 25 V increments |
| Control Architecture | PLC + colour touch‑screen controller |
| Liquid‑Driving Unit | Peristaltic pump (optional infusion pump) |
| Electrode Configuration | Platinum test tips; copper‑brass electrode rods |
| Electrode Dimension | 2 mm × 5 mm × 40 mm |
| Electrode Spacing | 4 ± 0.01 mm |
| Electrode Contact Pressure | 1.0 N ± 0.05 N |
| Standard Test Electrolyte | Solution A:0.1% NH₄Cl, resistivity 3.95±0.05 Ω·m; Solution B:1.98±0.05 Ω·m |
| Single Drop‑Volume Range | 0.019‑0.024 g (20 drops:0.380‑0.480 g; 50 drops:0.997‑1.147 g) |
| Droplet Fall Height | 35 ± 5 mm, adjustable |
| Drip‑Cycle Interval | 30 s ± 0.1 s, programmable |
| Total Droplet Setting | 1‑9999 drops configurable |
| Specified Inner Wind Speed | 0.2 m/s |
| Tracking‑Failure Judgment Condition | 0.50 A ± 10 %, duration 2.00 s ± 10 % |
| Power‑Supply Condition | AC 220V ±10 %, 50 Hz; custom‑voltage is available |
| Allowable Voltage Drop | 8 % under 1.0 A ± 0.1 A operating‑current |
| Overall Dimension(W×D×H) | 1120 × 520 × 1250 mm |
| Complete‑Machine Net Weight | 75 KG |
Compliance Standards: IEC 60112, GB/T 4207‑2022
Standard Complete Test Operating Workflow
- Pre‑Test Preparation
Place tester on level laboratory workbench and adjust levelling feet. Power‑on PLC‑touch‑screen system. Prepare qualified solid‑insulation specimens and prepare standard ammonium‑chloride contaminant solution. Inspect electrode integrity, peristaltic‑pump tubing condition and exhaust‑vent function. Configure target voltage, dripping interval, total droplet‑count and failure‑protection threshold on touch‑screen panel.
- Specimen & Electrode Setup
Mount conditioned test‑sample securely onto glass specimen support platform. Fine‑tune platform position, ensure electrode gap is set to 4 mm ± 0.01 mm and apply standard 1.0 N contact pressure. Verify droplet falling height is adjusted to 35 mm.
- Initiate Tracking‑Resistance Test
Close transparent observation door. Activate test‑sequence. The apparatus applies preset high‑voltage between two electrodes, and the peristaltic pump releases electrolyte droplets at programmed time‑intervals. Operators can watch surface changes of specimen via front‑window. System continuously monitors leakage‑current signal.
- Automatic Termination & Result Recording
When tracking‑failure condition is triggered (over‑threshold current lasting 2 seconds), equipment automatically cuts off high‑voltage output and halts dripping process. Record test‑voltage, total droplet‑number and specimen‑failure phenomenon for calculating CTI or PTI index value. Complete multi‑sample repeated tests as required by standards.
- Post‑Test Tidying
Take out tested specimen. Clean residual electrolyte contamination, carbonised tracking residues from electrodes and specimen‑stage. Flush peristaltic‑pump tubing to prevent salt‑crystal deposition. Turn‑off main‑power‑supply after finishing all test batches. Perform regular platinum‑electrode wear inspection and tubing‑replacement maintenance.
Wide Industrial Application Scenarios
Household‑Appliance & Electrical‑Component Manufacturers
CTI/PTI safety‑index testing for insulating plastic parts, switch bases and terminal components; verify insulation‑material selection meets electrical‑safety‑specification requirements.
Wire‑and‑Cable & Polymer‑Material Enterprises
Evaluate tracking‑resistance performance of engineering‑plastics, composite insulation substrates; support new‑formula insulating‑material R‑D and material‑grade screening.
Lighting & Low‑Voltage‑Appliance Factories
Insulation‑safety QC for lamp‑holder, circuit‑breaker internal insulating components under humidity‑pollution combined‑stress environment.
University Electrical‑Engineering & Material‑Science Laboratories
Specialised teaching‑research instrument for studying surface‑tracking‑failure mechanism of solid insulating materials.
Third‑Party Accredited‑Electrical‑Safety‑Testing‑Organizations
Conduct IEC 60112 / GB/T 4207‑2022‑compliant tracking‑index evaluation and generate formal inspection‑reports for product‑safety‑certification audits.
Standard Factory‑Full‑Delivery Kit
- KR‑727A CTI/PTI tracking‑index‑tester main‑unit
- Complete platinum‑tip electrode assembly and specimen glass‑support‑stage
- Peristaltic‑pump liquid‑delivery assembly with tubing set
- Built‑in exhaust‑vent system
- Power‑supply connecting‑cable
- Multilingual printed‑operation‑manual complying with IEC 60112, GB/T 4207‑2022
- Factory‑issued performance‑inspection‑certificate
Optional spare‑parts: extra platinum electrode tips, replacement pump tubing.
Global Distributor & After‑Sales‑Support
We provide remote‑one‑on‑one operational guidance covering electrode‑gap adjustment, electrolyte preparation, parameter‑programming and routine component‑maintenance. Spare‑parts stock includes platinum electrode tips, pump tubes and touch‑screen spare‑parts. Bulk‑order customers can apply for custom‑power‑supply‑voltage variants for overseas‑market deployment. Regional‑exclusive‑agent privileges contain priority‑production‑scheduling, OEM private‑branding‑services and complete‑set high‑definition product‑marketing‑image‑resources.
Product‑Banner‑Marketing‑Slogan
KR‑727A 600V Tracking Index Tester | IEC60112‑Compliant CTI‑PTI Analyser For Solid Insulation‑Material Anti‑Tracking‑Safety‑Evaluation
Core‑Feature‑Labels‑For‑Product‑Images
100‑600V Adjustable‑Test‑Voltage | PLC‑Touch‑Screen Control | Precision Peristaltic‑Pump Dripping | Platinum‑Tip Standard‑Electrodes | 1.0N Standard‑Electrode‑Pressure | Auto‑Failure‑Judgement & Emergency‑Stop | Transparent Observation‑Window | Built‑In Exhaust‑Vent | IEC60112‑GB/T4207‑Compliant
Safety‑Operation‑Reminder
High‑voltage exists inside test‑chamber during running test. Do not open observation‑door when high‑voltage output is active. Prepare protective gloves when handling corrosive ammonium‑chloride electrolyte solution. Keep equipment reliably grounded. Periodically inspect electrode wear‑condition and replace aged pump‑tubing.
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