UL 507 PA135A Insulation Integrity Probe for Film-Coated Wire

The UL 507 PA135A Probe is a precision safety instrument engineered to evaluate the insulation integrity of film-coated wires in compliance with UL 507 standards. As specified in Table 9.1 and Figures 9.1 and 9.2 of UL 507, this probe functions as a measuring device to assess accessibility to uninsulated live parts and film-coated wire through openings, without serving as a material strength evaluator. Force application is prohibited during accessibility judgments to maintain measurement accuracy.

Specifications:
Probe Type: UL 507 PA135A Probe (designed for film-coated wire insulation integrity testing in fans and blowers)
Handle Material: Nylon (fully insulating, heat-resistant up to 100°C; non-slip grip for precise pressure control)
Key Dimensions:
– Head Length: 12.7 mm (1/2 inch)
– Total Length: 101.6 mm (4 inches)
– Head Radius: 14.3 mm (9/16 inch)
– Former Head Diameter: R4.8 mm (3/16 inch)
– Tail Diameter: 19.1 mm (3/4 inch)

Test Procedures:
1. Inspect the probe for defects (e.g., bent tip, cracked handle, poor conductivity) and connect it to a leakage detection instrument.
2. Prepare the film-coated wire (sourced from fans or blowers) by ensuring it is clean, dry, and secured on a non-conductive surface.
3. Hold the insulating handle and align the brass tip with the wire’s film coating.
4. Glide the probe lightly along the wire’s entire length, maintaining consistent contact.
5. Monitor the detection instrument for signals indicating coating defects or electric leakage.
6. Record defective sections and determine if the wire meets safety requirements (pass/fail).

Applications:
1. Safety testing of film-coated wires in household pedestal fans and table fans, per UL 507:2023 Figure 8.6.
2. Verification of film-insulated wires in ceiling fans and exhaust fans (e.g., kitchen/bathroom) for U.S. market compliance.
3. Post-production audits of commercial air circulator wires to ensure insulation integrity in accordance with UL 507 standards.

Tags: SMT-PA135A, UL 1026, UL 1278, UL 507