P521/EN AD/B21 Update Documentation
Page 12/24 MiCOM P521
TECHNICAL DATA AND CURVE CHARACTERISTICS (P521/EN TD/B11)
6.2 Logic inputs and outputs
Logic input
−
Type Independent optical isolated
−
Burden 10mA per input
−
Recognition Times <10ms (dc applied to standard opto input)
<20ms (ac applied to standard opto input)
<20ms (dc applied to special ENA variant
input)
−
Supply Options:
24 - 60Vdc range
48 - 150Vdc range
130 - 250Vdc/
100 - 250Vac range
48 - 150Vdc (Special ENA*)
130 - 250Vdc (Special ENA*)
Between 19.2Vdc and 72Vdc
Between 19.2Vdc and 180Vdc
Between 19.2Vdc and 300Vdc/25Vac and
300Vac 50/60Hz
Between 19.2Vdc and 180Vdc
Between 19.2Vdc and 300Vdc
* Special ENA variants are intended for UK applications which require compliance
with EATS PAP 48-5 Issue 2: 2000 and NGTS 3.24.15 Issue 1 Dec 2000 section
7.55. These digital inputs (dc only) provide immunity to ac coupled differential power
frequency interference. The modified software filtering increases the recognition time
to <20ms.
Logic output
−
Type Dry Contact Ag CdO
−
Rating:
Make
Carry
Break
30 Amps and carry for 3s
5 Amps continuous
135Vdc, 0.3 Amps (L/R=30 ms)
250Vdc, 50W resistive or 25W inductive
(L/R=40ms)
220Vac, 5 Amps (cos ϕ=0.6)
−
Operation Time <7ms
−
Mechanical Durability >100 000 Operations
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