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DOC-MN-007-03 VCCM600 User Manual
Vox Power Limited | Unit 2, Red Cow Interchange Estate, Ballymount, Dublin 22, D22 Y8H2, Ireland | T +353 1 4591161 | www.vox-power.com
Hold-up
For short line distubances (<20ms), the output voltages will not be affected*. However, the ACOK signal may still go low to warn that there is an impending loss
of output power. The ACOK signal will return to the high state once the unit has recovered from the disturbance.
*Output modules that are adjusted above the hold-up voltage (as detailed in their respective datasheets), may experience a dip in voltage.
No Load Power/Standby Power Consumption
The no-load power consumption of the VCCM600 series PSU is extremely low when compared to similar configurable power supplies. With the output modules
enabled the unit typically only requires less than 15W with no output load. To reduce the no-load power further the outputs can be disabled using the inhibit
pins. With the outputs disabled the unit typically requires less than 10W. When the unit is in the standby (latched off) state, the power consumption is less than
1W.
Peak Power capability
The input module can provide a peak output power of up to 750W for a period of up to 5 seconds, provided the input current remains below the over current
protection threshold. Peaks of power lower than 750W can be supported for longer times provided the excess watt-seconds are equivalent. For example, 750W
peak for 5 seconds is an excess power of 150W*5s = 750Ws. 650W can be supported for 750Ws/50W = 15s. When using peak power capability, the user must
ensure the average power remains within ratings. Note that input module de-ratings apply to both rated power and peak power.
Input Module Protections
Over current protection (OCP)
The input module is protected from excessive input current by means of an over current protection circuit which limits the input current to approximately 7Arms
.
If the OCP threshold is exceeded the unit may shut down and attempt to automatically restart. This shutdown will generate the usual ACOK warning.
Under voltage protection (UVP) & Brown-Out Protection (BOP)
The input module is protected from excessively low input voltages by under voltage and brown out protection circuits that senses the input line voltage. The
under-voltage protection circuit maintains the unit in standby mode until the input voltage rises above the UVP threshold as detailed in the datasheet. Once the
unit is active, the brown out protection monitors the input voltage and shuts down the unit when input voltage goes below approximately 60Vrms. This
shutdown will generate the usual ACOK warning. The unit will restart once the input voltage increases above the UVP threshold.
Over Temperature Protection (OTP)
The input module is protected from excessive temperatures by means of various internal temperature sensors. If temperature thresholds are exceeded the entire
unit may latch off, with no ACOK warning. To re-enable the unit, it must be allowed to cool, then either disconnect the AC mains for approximately 20 seconds, or
toggle the standby control on J2.
Over Power Protection (OPP)
The input module is protected from excessive power by means of an over power protection circuit. Should the rated power be exceeded the unit will shut down
and attempt to recover automatically.
This shutdown will not generate the usual ACOK warning.
