Electrical; Input Voltage - Control Supply; Input Voltage - Dc Link Supply; Motor Output Protection - Sevcon Dragon8 Applications Reference Manual

Electrical

Input voltage – control supply
Nominal working voltage:
Working voltage limits:
Input protection:
Table 4 - Input voltage - control supply
Input voltage – DC Link supply
Nominal working voltage:
Working voltage limits:
Non-operational overvoltage limit:
Input protection:
Surge protection
Ground fault detection
Table 5 - Input voltage - traction supply

Motor Output protection

Output current: Reduced automatically from peak to continuous rating depending on the time a
peak load is applied to the controller.
Reduced automatically if operated outside normal temperature range.
Short-circuit: Protected against any motor phase to B- or B+ at power-up.
Protected against any motor phase to another motor phase at any time during
operation.
At switch-on Dragon8 detects valid output loads are present before applying
drive current.
Table 6 - Motor output protection
Repetitive short circuits may damage the controller.
26
12V to 24V
8V to 36V
Input protected against reverse connection of
battery
72/96V
36V to 90V/50V to 140V dc
96V/145V dc
User must ensure that reverse polarity protection is
provided external to the controller, for example by
control of the main line contactor.
The Dragon8 controller has an in-built DC-Link
pre-charge circuit to minimise inrush current.
User must ensure that ground fault protection is
provided external to the controller, for example by
control of the main line contactor.