Washing Machine Door Opening During Spin Is a Safety Incident? NL-WML-4 Door Lock & Safety Interlock Endurance Tester Runs Four Stations (washing machine test equipment)

If the door lock fails or the interlock signal is misjudged during a high-speed spin, a door that can be opened is a direct safety incident; over-sensitive interlock logic causes constant alarms and mid-cycle stops instead. Bolt travel, microswitch contact condition and PTC or solenoid lock actuation delay all degrade silently over tens of thousands of cycles, so an accelerated life test before shipment is the only backstop.

What the NL-WML-4 door lock and interlock endurance tester measures

• Four stations closing and opening in parallel, reproducing real closing force and bolt travel
• Bolt-in-position signal and interlock contact make / break reliability, plus contact resistance trend
• Lock actuation delay and unlock response time
• Closing force – displacement curve with automatic jam and not-in-position detection
• Optional live load switching to verify the spin-stage safety interlock circuit
• Action counting, automatic failure stop and record, one-click report export

Applicable standards

IEC 60335-2-7 (washing machines – safety), GB 4706.24 (particular requirements for washing machines), GB/T 4288 (electric washing machines for household use), IEC 60730-2-8 (automatic electrical controls), plus customer-specific acceptance criteria.

Stations and throughput

Four-station and eight-station configurations running 24/7 — the tens of thousands to hundreds of thousands of door cycles no operator can complete by hand are finished in a few days.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of washing machine test equipment, dishwasher test equipment, pump test bench and pump performance test systems and level sensor life test machines.

Keywords: pump test bench, pump performance test, level sensor life test, dishwasher test equipment, washing machine test equipment.