Instruction manual – AP901S Arc Protection Unit
31 (43
)
A1027A
7.2.2
B
INARY INPUTS
BI1,
BI2,
BI3,
BI4,
BI5
AND
BI6
AP901S contains six binary inputs. Typically, BI1 and BI2 are reserved for breaker position
signal information. In the most application the BI3 is responsible for receiving overcurrent from
AP910P. The BI4, BI5 and BI6 can be used for receiving a trip signal or arc light signal. See
chapter 3.5 Dipswitch settings.
Note: when AP901S receives overcurrent signal from NP900 Series protection relays the
actual operation time depends on the operation time of the external device and so total
operational time cannot be specified or guaranteed.
The inputs are activated by connecting a dc signal exceeding the specified nominal threshold
level of the corresponding input. There are three different nominal threshold levels available,
24 or 110 or 220 Vdc. The desired threshold value has to be specified when ordering. The
actual activation of the binary input occurs at 80% of the specified nominal threshold value (i.e.
16 Vdc, 88 Vdc or 178 Vdc).
7.3
A
UXILIARY VOLTAGE
The auxiliary power supply voltage is 80….265Vac/dc. Optionally an 18…72Vdc version is
available.
After powering up the unit protection is active and operational within 50ms.
Summary of Contents for AP901S
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