Output Contacts; Functional Performance; Phase-Fault Overcurrent Protection - Siemens 7SG11 Manual

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
110, 125
220, 250
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.
1.3

Output Contacts

Contact rating to IEC 60255-0-20
Attribute
Carry continuously
Make and carry
(L/R 40 ms and V 300 V)
Break
( 5 A and 300 V)
Minimum number of operations
Minimum recommended load
1.4

Functional Performance

1.4.1

Phase-fault Overcurrent Protection

A time-delayed characteristic (IDMTL, DTL) and 3 instantaneous/DTL characteristics (Lowset, Highset 1 and
Highset 2) are provided.
1.4.1.1 Time Delayed Characteristic
Operate Level
Attribute
Is Setting range
I Operate level
op
Reset level
Repeatability
Variation
Operate Time
Attribute
Starter operate time
char Characteristic setting range
©2013 Siemens Protection Devices Limited
Operating Range
87.5 to 137.5 V DC
175 to 280 V DC
Value
for 0.5 s
for 0.2 s
AC resistive 1250 VA
AC inductive
DC resistive
DC inductive
Value
0.05, 0.1...2.50 xIn
105 % Is,
95 % I
5 %
-10 °C to +55 °C
5 %
47 Hz to 52 Hz
57 Hz to 62 Hz
5 %
harmonics to 550 Hz
Value
See Figure 1.5-2,
NI (IEC type A), VI (IEC type B), EI (IEC type C), LTI, DTL
5 A AC or DC
20 A AC or DC
30 A AC or DC
250 VA at p.f. 0.4
75 W
30 W at L/R 40ms
50 W at L/R 10ms
1000 at maximum load
0.5 W at minimum of 10mA or 5V
4% or 1 % In
5% or 1 % In
op
5 ms
7SG11 Argus Technical Reference
Typical burden
1.75 mA to 3.0 mA
1.75 mA to 3.0 mA
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