Atlas Copco QAS 60 Pd, Инструкция по эксплуатации, Страница: 57 / 142

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Load Take Over (LTO) operation
This application is normally used in combination with
SEMI-AUTO mode or AUTO mode in installations
with the Mains.
The purpose of the load take over mode is to transfer
the load imported from the mains to the gen-set for
operation on generator supply only.
The generator will start-up, synchronise and take over
the load from the Mains gradually, before opening the
Mains Breaker. To know if the load is completely
taken over from the mains, an optional Power
Transducer is necessary.
Installation wirings
– The link between X25.10 & X25.11 has to be
removed.
– Mains breaker feedback lines have to be wired to
X25.10/X25.11/X25.12.
– Mains breaker control lines have to be wired to
X25.13/X25.14/X25.15/X25.16. These terminals
are voltage free contacts. The power for the MB
has to be supplied by the customer (24 Vdc/
230 Vac) (max. contact rating K11, K12 = 250 V/
16 A).
– The Mains sensing lines L1/L2/L3/N have to be
wired to terminals X25.3/X25.4/X25.5/X25.6.
– Make sure the connections between X25.33 &
X25.3; X25.34 & X25.4; X25.35 & X25.5;
X25.36 & X25.6 are removed.
– Power Transducer lines have to be wired to
X25.21 (input) and X25.22 (GND).
– Verify all settings for paralleling set up (see
“Paralleling”).
Mains Power Export (MPE) operation
This application is possible in combination with
SEMI-AUTO mode or AUTO mode. The internal real
time clock timer can only be used in AUTO mode.
Installation is with the Mains.
The mains power export mode can be used to
maintain a constant level of power through the mains
breaker. The power can be exported to the mains or
imported from the mains, but always at a constant
level.
G
Qc4002
PT
LOAD
Generator
breaker
Mains
breaker
G
Qc4002
PT
LOAD
Generator
breaker
Mains
breaker