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| U1 For Equipment SafetyConditions for safe output voltage. If any of these conditions are compromised, the U1 shuts off output current until the problem is resolved at which time the U1 automatically restores output current. |
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Line/Neutral voltage is below normal. No damage from overvoltage. Line/Neutral voltage is higher than normal. No damage from overheating. Neutral conductor is grounded. Safe for 2 wire appliances. Grounding conductor is connected. Safety and protection from electro-magnetic interferance. |
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