W2R Automatic Transfer Switch

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Description

The W2R automatic transfer switch is a compact dual-power transfer device for normal and standby supply systems. It is used to monitor the availability of the regular and backup power supplies and transfer the load when the normal supply becomes abnormal. The series covers regular household power applications and PV-related transfer applications while sharing the same main electrical parameter framework.

Key Features

  • Designed for compact emergency power and dual-supply transfer systems.
  • Suitable for AC 50/60Hz systems with rated voltage AC400V.
  • Available in 2P, 3P and 4P configurations.
  • PC-class transfer device for making and withstanding current, not for breaking short-circuit current.
  • Complies with low-voltage switchgear and controlgear requirements referenced in IEC 60947-6-1 and IEC 60947-3.

Application Versions

  • Regular version: used for automatic conversion between normal and standby supplies.
  • PV version: used where a PV-related supply arrangement requires automatic transfer between available power sources.

Technical Parameters

Rated current Ie16A, 20A, 25A, 32A, 40A, 50A, 63A, 100A
Insulation voltage UiAC690V
Rated voltage UeAC400V
GradePC grade
Use categoryAC-33iB
Poles2P, 3P, 4P
Weight0.62kg, 0.72kg, 0.81kg
Electrical life2000 operations
Mechanical life5000 operations
Rated conditional short-circuit current Iq50kA
SCPD fuseRT16-00-63A
Rated impulse withstand voltage8kV
Control circuitRated control voltage Us: AC220V, 50Hz; correct working condition: 85%Us to 110%Us
Auxiliary circuitAC220V / AC110V, 50/60Hz
Transfer timesContact transfer, operating transfer, return transfer and off-time: <50ms
Temperature range-5℃ to +40℃; 24-hour average not more than 35℃

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