Specifications

100 – 1000 Amps
SL-20610 (R 11/02) 9
2.2.2.1 Metering
The following metering parameters shall be displayed:
• Input AC voltage both sources, line-to-line for each phase
• Input AC current for both sources for each phase
• Input frequency for both sources
• Output kVA
• Output KW
• Percent load
• Number of switch transfers,
• Synchronization phase angle
All voltages and currents shall be measured using true-RMS techniques for accurate representation of
non-sinusoidal waveforms associated with computers and other electronic loads. The metering parameters
shall have a full-scale accuracy of +/-2%.
2.2.2.2 Alarm Messages
Active alarms shall be monitored and displayed simultaneously as part of the LCD event panel. The
following alarm messages shall be displayed:
Source 1 Failure CB1( Source 1) Open Power Supply S1 AC Failed
Source 2 Failure CB2 ( Source 2) Open Power Supply S2 AC Failed
Sources Out of Sync CB3 (Output) Open Power Supply DC A Failed
Source 1 Overvoltage CB3A Open (If used) Power Supply DC B Failed
S1Undervoltage (fast) CB4 (S1 Bypass) Closed Power Supply Logic Failed
S1Undervoltage RMS (slow) CB5 (S2 Bypass) Closed S1 Voltage sense module
failed
Source 2 Overvoltage CB1 Shunt trip fail S2 Voltage sense module
failed
S2 Undervoltage (fast) CB2 Shunt trip fail S1 SCR sense module failed
S2 Undervoltage RMS (slow) S1 SCR Open S2 SCR sense module failed
Source 1 Overcurrent S2 SCR Open S1 Current sense module
failed
Source 2 Overcurrent S1 SCR Shorted S2 Current sense module
failed
Source 1 Over/Under
Frequency
S2 SCR Shorted S1 Gate drive module failed
Source 2 Over/Under
Frequency
Primary fan failure S2 Gate drive module failed
Source 1 Phase Rotation Error Control Module Fail Internal comm failed
Source 2 Phase Rotation Error S1 I-peak Option comm failed
Output undervoltage S2 I-peak Output voltage sense module
failed
STS on alternate source Auto Retransfer Inhibit Heatsink Overtemp
Transfer Inhibit