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7SR11 & 7SR12 Performance Specification
1.2
Energising Quantities
1.2.1
Auxiliary Power Supply
IEC60255-11 & ENATS 48-4
Nominal Operating Range
24 to 60 VDC
80 to 250 VDC
V
115 VAC 50/60Hz
aux
24 to 250 VDC
100 to 230 VAC 50/60Hz
*No relay operation outside of this range is permissible or implied.
1.2.1.1
Burden
Battery loading can be estimated from the following maximum figures (LV and HV PSU):
Attribute
Voltage
Quiescent Relay
(inc.'PROT HEALTHY' LED)
Backlight
LED - Red or Green)
LED – Yellow
Binary Output
Optional IEC 61850 Comms Interface
Battery loading can be estimated from the following approximate figures (Universal PSU):
Attribute
Voltage
Quiescent Relay (inc. 'PROT HEALTHY' LED)
Backlight
Per LED – (Red or Green)
Per LED – Yellow
Per Binary Output
Optional IEC 61850 Comms Interface
©2017 Siemens Protection Devices Limited
Absolute Range*
18 to 72 VDC
64 to 300 VDC
92 to 138 V rms AC
19.2 to 275 VDC
80 – 253VAC
Watts
24V
30V
3.7
Each led
Each led
Each output
24
48
3.8
3.5
1.4
1.3
0.03
0.03
0.06
0.06
0.4
0.35
2.7
2.6
Comments
Low voltage (LV) PSU suitable for
24VDC, 30VDC, 48VDC and 60VDC systems
High Voltage (HV) PSU suitable for
110VDC, 220VDC and 115VA systems.
Universal PSU (UPSU) suitable for
24 - 250 Volts DC and
100 - 230 Volts AC systems
48V
110V
220V
3.6
1.3
0.03
0.06
0.35
2.5
Watts (DC)
60
110
125
3.4
3.3
3.2
1.2
1.2
1.2
0.03
0.03
0.03
0.06
0.06
0.06
0.35
0.35
0.35
2.5
2.5
2.5
Chapter 3 Page 8 of 56
VA
115V AC rms
50/60Hz
9
3.2
0.05
0.1
0.7
5.5
220
250
3.0
3.0
1.1
1.1
0.03
0.03
0.06
0.06
0.3
0.3
2.5
2.5
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