CE+T Power BRAVO ST-120 VAC-UL, Руководство пользователя

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TSI TECHNOLOGY
11 - Bravo ST 120 Vac - 2+1 Redundancy - User Manual - v1.0
4.1 EPC Mode
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In EPC Mode, the AC Main source is the primary source while the DC source is secondary.
•
The TSI is designed to operate on the AC main source on a permanent basis and to deliver output AC voltage
with low THD.
•
There is no physical difference on the output sine wave whether the source is AC (or) DC. If the AC main source
is out of tolerance or drops below acceptable level, the converter seamlessly switches to DC and the converter
operates in “Back-up Mode” (Transfer time is 0 ms).
•
As soon as the AC main source returns to its normal operating range, the EPC Mode is automatically resumed.
•
The EPC Mode offers higher efficiency (up to 96% depending on the model) without compromising the purity of
the sine wave output.
•
To set EPC Mode in T2S ETH, go to Parameters > Power > General > Source power ratio DC vs AC (%) and
enter the value
“0” .
4.2 On-line Mode (REG Mode)
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In On-line Mode, the DC source is the primary source of supply while the AC main source works as the
secondary source of supply. Switching time between DC input and AC input is 0ms (source transfer).
•
The power delivered by the DC source (usually a battery but it could be any other type of DC generator) is
converted to provide regulated and transient free AC power to the load.
•
In case of short circuit at the load side, the boost is automatically energized for a specific duration to trip
downstream protective devices.
•
To set On-line Mode in T2S ETH, go to Parameters > Power > General > Source power ratio DC vs AC (%) and
enter the value
“100” .
4.3 Safe Mode
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Safe Mode uses the DC source as primary source of supply while the AC main source is in secondary standby.
•
The AC main source is normally disconnected through an internal relay and is only connected when down
stream fault clearance is required (boost) or if the DC source is unavailable.
•
The transfer time between DC and AC results in a typical transfer time of 10 ms.
•
Safe Mode is used in extremely harsh environments such as railways. Under harsh conditions it provides extra
isolation against disturbances carried by the AC main source.
•
To set Safe Mode in T2S ETH, go to Parameters > Power > AC In > Mode On Line (Safe) and select “Enable”
from drop down list.
4.4 Mix Mode & Walk-in Mode
•
Walk-in Mode allows the inverter to come back progressively on the AC priority source after an outage. This is to
avoid block loading a generator.
ƒ To set Walk-in Mode in T2S ETH, go to Parameters > Power > Other > Walk In Mode Time (x10 s) and
select “Enable” from drop down list.
•
In Mix Mode, the total output load of the module will be shared by both DC and AC input sources.
ƒ To set Mix Mode in T2S ETH, go to Parameters > Power > General > Source power ratio DC vs AC (%)
and enter the value between “0-100” . (0 - only AC, 100 - only DC)