Rectifier/Inverter 6/12 Pulse Dc Controllers | Protection

DC fault protection (on rectifier)

• Detection delay: Detection delay of DC fault (seconds);
• Vd threshold: DC voltage threshold used for DC fault detection (pu);
• α delay: Value of the constant α angle imposed after a fault is detected (degrees);
• α delay duration: Time interval during which the value of the forced α angle is imposed by the DC protection system. (seconds);
• α delay number: Number of times the constant α angle is imposed and then removed before the converter is automatically blocked by the DC fault protection;

Protection against commutation failure (inverter)

• ON/OFF Protection (1/0): “1” enables protection, “0” disables protection;
• γcf: Value added to the lower limit of γ by the protection for commutation failures (degrees);
• Rise time: First order time constant affecting the increase of minimum γ (seconds);
• Fall time: First order time constant affecting the decrease of minimum γ (seconds);