Tecnoware EVO DSP TM, User Manual

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UPS EVO DSP TT 21 User’s Manual
5.3 Switching into Manual Bypass during Operation
Manual Bypass enables the user to isolate the electronic circuitry of the UPS from the mains and the
load without interrupting the load operation by connecting the loads directly to the Bypass supply.
This feature is useful while performing maintenance or service and shall only be executed by
authorized technical service personnel.
Maintenance and service may only be performed by authorized technical personnel
1 Bring the manual Bypass circuit breaker (F3) to “ON”/“1” position.
2 Make sure that the UPS switches into Bypass mode (see “BYPASS” message on the LCD).
3 Bring the Input circuit breaker (F1) to “OFF”/“0” position.
4 Bring the Inrush circuit breaker (F6) to “OFF”/“0” position.
5 If the Bypass mains input is separated, bring the Bypass circuit breaker (F4) to “OFF”/“0” position.
6 Bring the Output circuit breaker (F2) to “OFF”/“0” position.
7 Bring the Battery circuit breaker (F5) to “OFF”/“0” position.
8 LCD and buzzer will stop operation in a few minutes.
During manual Bypass operation, loads are fed directly from Bypass mains. Therefore no
protection against mains disturbances or interruptions is present.
Although all breakers except F3 are “OFF”/“0” during manual Bypass operation,
hazardous voltages are present on the terminals, EMC filters and measurement circuits.
5.4 Returning from Manual Bypass to UPS
1 Bring the Output circuit breaker (F2) to “ON”/“1 position.
2 Bring the Input circuit breaker (F1) to “ON”/“1” position.
3 Wait to see the “BYPASS” message on the LCD.
4 Bring the Inrush circuit breaker (F6) to “ON”/“1” position.
5 If the Bypass mains input is separated, bring the Bypass circuit breaker (F4) to “ON”/“1” position.
6 Bring the manual Bypass circuit breaker (F3) “OFF”/“0” position.
7 Wait to see the “NORMAL” message on the LCD.
8 Bring the Battery circuit breaker (F5) to “ON”/“1” position.
5.5 Connection to a Generator
If the input power is supplied by a generator, set the digital input “GEN ON” high. This ensures
“Generator Friendly” operation by smoothing the increment of the current drawn from the generator,
during transition from Battery mode to Normal mode.
When this is done, “GENSET ON” alarm will be shown. Connection details are given in the
“Communication Interfaces” section.