Instruction manual – AP901S Arc Protection Unit
12 (43
)
A1027A
3.4
R
ESET
All LED indications and latched trip relays are reset by pressing the “SET” button for 1 second.
Otherwise the latched trip relays will remain activated until auxiliary power is disconnected. All
LED indications will remain active until reset is performed by the operator even when auxiliary
power supply is disconnected (see chapter 3.6 Non-volatile memory).
3.5
D
IPSWITCH SETTINGS
AP901S functionality such as tripping logic is configured using dipswitch settings. Different trip
schemes can be easily programmed by selecting the appropriate dipswitch positions. This
gives users the flexibility to change settings dependent on application. Tripping may be
selected based on arc light only or arc light and current thresholds (or other tripping criteria
such as undervoltage, or similar). Current threshold or other tripping criteria may be applied to
binary input BI1 for blocking trip caused by natural light sources. Also the CBFP scheme may
be enabled using the dipswitches (the dipswitch number 4 is enabling CBFP function for
corresponding scheme selection). The dipswitch number 1...4 are used as scheme selection.
The scheme number is according to binary arithmetic. Dipswitches are located at the back of
the unit for easy access. See Figure 3-1: AP901S dipswitch and Table 3-2 AP901S dipswitch
setting for details of settings.
Figure 3-1: AP901S dipswitches
Summary of Contents for AP901S
Page 1: ......
Page 43: ...Instruction manual AP901S Arc Protection Unit 43 43 A1027A ...
