KEPCO MST 100-2MHT, Operator'S Manual

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MST-MHT SERIES 071320
1.4.2 STATUS INDICATORS
Six status indicators at the front panel provide operational information (see Table 2-2):
• VOLTAGE MODE
• CURRENT MODE
• CURRENT SHARE
• OUTPUT ENABLED
• POLARITY REVERSED
• OUTPUT FAULT
1.4.3 FRONT PANEL METERS
Two digital meters at the front panel provide displays of output voltage and current. These dis-
plays show 3.5 digits and are provided for reference only, accurate to 0.5% (typical) for voltage
and 1.5% (typical) for current.
1.4.4 OUTPUT ENABLE/DISABLE AND POLARITY REVERSAL
The MST-MHT Power Module features integral relays to enable/disable the output. Separate
relays are provided for power and sense connections. Disabling the MST-MHT as a voltage
source means opening the connection between the power supply and its load. Disabling the
MST-MHT as a current source means shorting the power supply's output terminals. Polarity
reversal relays are installed, but not supported at this time. If polarity reversal is needed, refer to
Kepco’s MST Series.
1.4.5 PROTECTION
The MST-MHT Power Module incorporates the following protection circuits which cause the
MST-MHT to automatically isolate the load and force power module output voltage and current
to zero.
• Overvoltage protection: Automatic (non-adjustable) power shutdown if the output
exceeds hardware trigger value specified in Table 1-1.
• Overcurrent protection: Programmable, tracks output current; disables output if output
current exceeds programmed value (see PAR. 3.7.2).
• Overtemperature: Activated when the internal temperature exceeds a safe operating
threshold (see PAR. 3.7.4).
• AC loss: Activated if loss of source power detected (see PAR. 3.7.5).
• Open power lead and sense wire: Activated if an open sense wire or open power lead is
detected (see PAR. 3.7.6).