Superior Electric SLO-SYN TD Series, Инструкция по эксплуатации

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14 Operation
4.4 Protective Features
4.4.1 AC Line Fusing
The AC line is protected by fuses located inside the unit on the circuit card near the input terminals. Since
access to the fuses requires disassembly of the unit and an open fuse would normally indicate a drive
malfunction, such as a blown output IGBT, it is recommended that the unit be returned to the factory for
repair.
4.4.2 Regen Resistor Fusing
The regen resistor is protected by a fuse located inside the unit on the heat sink. An open fuse normally
indicates a drive malfunction, such as a bad regen resistor or a failed driver transistor. Because of this fact
and since access to the fuse requires disassembly of the unit, if the fuse blows, return the unit to the factory
for repair.
4.4.3 Over Current
The over current feature protects the unit from short circuits between the motor output terminals and
between the motor output terminals and the terminals to ground. The LED will activate if either of these
conditions occur. AC power must be turned off and back on to reset the drive. Ensure the LED is off and
the source of the short circuit is corrected before reenergizing the drive.
4.4.4 Over Temperature
The drive is protected from over temperature by utilizing a thermal switch mounted on the inside of the heat
sink. When the switch temperature exceeds 70
°
C (158
°
F), the over temperature LED will activate. AC
power must be turned off and back on to reset the drive. Fan cooling may be required to keep the drive
within the temperature specifications listed in Section 2.1.
4.4.5 Over Voltage
The drive has over voltage protection which will activate both LED’s when the DC bus voltage exceeds 410
volts. The most likely causes for this condition are too high of a regeneration energy from the servo system
or an open regen fuse. AC power must be turned off and back on to reset the drive. If the load regeneration
is too high, an external regeneration resistor is required. See Section 3.5 for application details.
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