Siemens 7SR12 Argus - Energising Quantities; Auxiliary Power Supply

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 8 of 56
1.2 Energising Quantities
1.2.1 Auxiliary Power Supply
IEC60255-11 & ENATS 48-4
Nominal Operating Range
Absolute Range*
Comments
V
aux
24 to 60 VDC 18 to 72 VDC
Low voltage (LV) PSU suitable for
24VDC, 30VDC, 48VDC and 60VDC systems
80 to 250 VDC
115 VAC 50/60Hz
64 to 300 VDC
92 to 138 V rms AC
High Voltage (HV) PSU suitable for
110VDC, 220VDC and 115VA systems.
24 to 250 VDC
100 to 230 VAC 50/60Hz
19.2 to 275 VDC
80 – 253VAC
Universal PSU (UPSU) suitable for
24 - 250 Volts DC and
100 - 230 Volts AC systems
*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
Watts
VA
Voltage 24V 30V 48V 110V 220V 115V AC rms
50/60Hz
Quiescent Relay
(inc.‘PROT HEALTHY’ LED)
3.7 3.6 9
Backlight
1.3
3.2
LED - Red or Green)
Each led
0.03
0.05
LED – Yellow
Each led
0.06
0.1
Binary Output
Each output
0.35
0.7
Optional IEC 61850 Comms Interface
2.5
5.5
Battery loading can be estimated from the following approximate figures (Universal PSU):
Attribute
Watts (DC)
Voltage
24
48
60
110
125
220
250
Quiescent Relay (inc. ‘PROT HEALTHY’ LED)
3.8
3.5
3.4
3.3
3.2
3.0
3.0
Backlight
1.4
1.3
1.2
1.2
1.2
1.1
1.1
Per LED – (Red or Green)
0.03
0.03
0.03
0.03
0.03
0.03
0.03
Per LED – Yellow
0.06
0.06
0.06
0.06
0.06
0.06
0.06
Per Binary Output
0.4
0.35
0.35
0.35
0.35
0.3
0.3
Optional IEC 61850 Comms Interface
2.7
2.6
2.5
2.5
2.5
2.5
2.5