| After-sales Service: | 3 Years |
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| Warranty: | 3 Years |
| Display: | Digital |
| Samples: |
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| Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier 
Overview:
The ATB-677 is an anti-islanding device for small distributed phtotvoltaic stations, which trips the parallel network switch for safety when an unplanned islanding effet exists. The device can be installed in a group of panels or in the switchgear.
Protection Function:
Frequency too high 1 paragraph
Frequency too high 2 segments
Frequency too low 1 segment
Overvoltage 1 segment
Overvoltage 2 segments
Low voltage 1 segment
Low voltage 2 segments
Sudden frequency change
Voltage-dependent automatic closing
External link jump
System power loss
Overcurrent 1 segment
Overcurrent 2 segments
Overcurrent 3 segments
Zero sequence overcurrent
Inverse powder
Power Recovery Closure
Haemonic monitoring
Suppliers with verified business licenses
Audited Supplier 
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