Quick Answer
To ensure NEC 690.12 compliance for solar rapid shutdown, testing procedures include verifying the system disconnects within 30 milliseconds of the shutdown signal and that all PV system conductors are de-energized within 2 seconds. Testing also involves simulating various fault conditions to validate the system's response. Compliance is achieved through a combination of manual and automated testing.
Testing Equipment and Setup
NEC 690.12 compliance testing typically involves a combination of manual and automated testing equipment. A multimeter or oscilloscope is often used to measure voltage and current levels, while a relay or other switching device is used to simulate the shutdown signal. The setup should include a PV array simulator to mimic the PV system’s output, a DC power source, and a switch or relay to simulate the shutdown signal.
Testing Scenarios and Requirements
To ensure NEC 690.12 compliance, the following testing scenarios should be simulated:
- A 30-millisecond shutdown response time to the shutdown signal
- A 2-second maximum time for all PV system conductors to de-energize
- Testing under various fault conditions, such as a short circuit or open circuit, to validate the system’s response
- Testing at different temperatures and environmental conditions to ensure the system operates as specified
Documentation and Record-Keeping
After completing the testing procedures, it is essential to document and record the results. This includes maintaining a record of the testing equipment used, the test setup, and the test results. Additionally, any deviations from the expected behavior or non-compliance issues should be documented and addressed.
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