Connecting The Remote Maintenance Bypass - Siel Safepower-Evo HF 15kVa Manuel D'installation Et D'utilisation

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ONNECTING THE
An additional maintenance bypass may be installed on a peripheral switchboard, for example, to enable the UPS to be
replaced without interrupting the power supply to the load.
It is absolutely essential to connect the "SERVICE BYPASS" terminal (see "View of UPS connections"
ref. 17) to the auxiliary contact of the SERVICE BYPASS switch. Closing the SERVICE BYPASS switch
(4) opens this auxiliary contact which informs the UPS that the maintenance bypass has been
activated. If this connection is not present, the power supply to the load may be shut off and the UPS
damaged.
NOTES: Use cables with a cross section that conforms to the indications given in "Cross Section of the Cables ".
Use a double insulated cable with a cross section of 1mm2 to connect the "SERVICE BYPASS" terminal to
the auxiliary contact of the remote maintenance bypass isolator.
Whenever the UPS is equipped with internal isolation transformer, check the compatibility between
the "remote maintenance bypass" and the neutral arrangement in the electrical plant.
REMOTE MAINTENANCE BYPASS INSTALLATION DIAGRAM ON THE THREE-PHASE MODEL
Peripheral switchboard
Internal connections of the UPS
LINE switch: automatic circuit breaker, must conform to the indications given in "External Protective Devices "
INPUT switch: isolator conforming to the indications given in "Internal Protective Devices of the UPS"
OUTPUT switch: isolator conforming to the indications given in "Internal Protective Devices of the UPS"
SERVICE BYPASS switch: isolator conforming to the indications given in "Internal Protective Devices of the
UPS" equipped with a normally closed auxiliary contact
IV330 Rev.001 SIEL S.p.A.
Data di emissione: 2011-09-28
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EMOTE AINTENANCE
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YPASS
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