Ice AP901S, Инструкция по эксплуатации

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Instruction manual – AP901S Arc Protection Unit 27 (43
)
A1027A
6 A
PPLICATION EXAMPLES
AP901S may be applied to a variety of power switchgear and controlgear layouts and
technologies. Some typical applications are described in this section. Please consult your
nearest ICE representative for a solution to your particular application.
6.1 MV
OR
LV D
OUBLE
B
USBAR APPLICATION WITH CURRENT AND LIGHT CONDITION
AP901S may be applied requiring both overcurrent and arc light conditions for trip. In this case
tripping is performed only if both conditions are fulfilled simultaneously. Typically the
overcurrent condition is obtained from the AP910 unit or monitored by NP900 Series protection
relays also (e.g. generic feeder protection relay) and the total operation time is then dependent
on device feeding the overcurrent signal to AP901S.
Figure 6-1 shows an example of a double busbar arc protection system applying both
overcurrent and arc light for tripping. S1 channel is typically monitoring the outgoing cable
compartment. S2 channel is monitoring the breaker compartment. S3 and S4 are respectively
monitoring Reserve busbar and Main busbar. The busbar arc light fault information is sent out
through binary output channel BO1 (main busbar) and channel BO2 (reserve busbar)
The current monitoring signal is in this application coming from an external overcurrent relay
through binary input channel BI3. The position of breaker can be manually connected with
either main busbar or reserve busbar. For indicating the precise breaker location, its position
information is sent to AP901S via binary input channel BI1 (main busbar) or BI2 (reserve
busbar).
The trip contact T1 is responsible for tripping the breaker. The trip contact T3 gives trip alarm
information synchronically.
The connection of this example application is also shown in chapter 8 Wiring diagram.