Siemens Protection Devices Limited 5
DC status input
Nominal voltage Operating range
30V 18 - 37.5 V D C
48V 37.5 - 60 V D C
110V 87.5 - 137.5 V D C
220V 175 - 280 V D C
Attribute Value
Min. DC Current for
Operation:
30/48V
110/220V
10mA
<5mA
Reset/Operate voltage ratio
≥ 90 %
Typical response time
5 ms
(10ms for Argus 2 type II )
Typical response time when
programmed to energise an
output relay contact
< 15 ms
Recommended Minimum
pulse duration
40ms with setting of 20ms
PU delay for a.c. rejection
For relays to ES148-4 standard and 110/125 or 220/250
volt DC working a 48 volt status input is supplied for use
with external dropper resistors:
Nominal Voltage Resistor Value Wattage
110V 2k7 ± 5% 2.5 W
220 V 8k2 ± 5% 6.0 W
Each status input has associated timers which can be
programmed to give time delayed pick-up and time delayed
drop-off. These timers have default settings of 20ms, thus
providing rejection and immunity to an AC input signal.
Status inputs will not respond to the following:-
250V RMS 50/60Hz applied for two seconds through a 0.1μF
capacitor.
Discharge of a 10μF capacitor charged to maximum DC
auxiliary supply voltage.
The status inputs with nominal voltage of 30 V to 54 V meet
the requirements of ESI 48-4 ESI 1.
Low Burden Status Inputs
Optionally, low burden status inputs are available directly rated
for 110/125Vd.c. or 220/250Vd.c. without dropper resistors.
These inputs do not meet the ESI 48-4 ESI 1 requirements.
Where necessary a single external dropper resistor in parallel
can be fitted to meet ESI 48-4 ESI 1 requirements.
Low Burden Status Input performance
Nominal Operating Range Typical burden
110, 125
87.5 to 137.5 V
DC
1.75 to 3.0 mA
220, 250 175 to 280V DC 1.75 to 3.0 mA
110/125 V minimum pick-up voltage typically 50 – 60 V d.c.
220/250 V minimum pick-up voltage typically 100 – 120 V d.c.
Output relays
Carry continuously 5A ac or dc
Make and carry
(L/R ≤ 40 ms and V ≤
300V)
20A ac or dc for 0.5s
30A ac or dc for 0.2s
Breaking Capacity
( ≤ 5 A and ≤ 300 V):
AC Resistive
AC Inductive
DC Resistive
DC Inductive
1250 VA
250 VA at p.f. ≤ 0.4
75 W
30 W at L/R ≤ 40ms
50 W at L/R ≤ 10ms
Minimum number of
operations
1000 at maximum load
Minimum recommended
load
0.5 Watt minimum of 10mA or
5V
Vibration (Sinusoidal)
IEC 60255-21-1 Class I
Vibration response 0.5gn
Vibration endurance 1.0gn
Shock and Bump
IEC 60255-21-2 Class I
Shock response 5gn, 11ms
Shock withstand 15gn, 11ms
10 gn, Bump test, 16ms 10gn, 16ms
Seismic
IEC 60255-21-3 Class I
Seismic Response 1gn
Mechanical Classification
Durability
In excess of 10
6
operations
Insulation
IEC 255-5 rms levels for 1 minute
Between all terminals and
earth for 1 minute
2.0 kV rms
Between independent
circuits for 1 minute
2.0 kV rms
Across normally open
contacts for 1 minute
1.0 kV rms
Electrical Tests
Mechanical
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