7SG12 DAD N Performance Specification
4.3 A.C Current Inputs
1 Amp and 5 Amp current inputs are both available on the rear terminal blocks for most functions except
Capacitor Unbalance.
Thermal Withstand
Continuous and Limited Period Overload
AC Current Inputs
3.0 x In
Continuous
3.5 x In
for 10 minutes
4.0 x In
for 5 minutes
5.0 x In
for 3 minutes
6.0 x In
for 2 minutes
250A
for 1 second
625A peak
for 1 cycle
A.C. Burden
A.C. Burden
1A tap
0.2 VA
5A tap
0.3 VA
NB. Burdens are measured at nominal rating.
4.4 Output Contacts
Output contacts functionality is fully programmable. The basic I/O module has 5 output contacts three of which are
change over. Additional modules can be added with consequential increases in case size, to provide more
contacts. These are added in-groups of eight up to a maximum of 29
Output Contact Performance
Contact rating to IEC 60255-0-2.
Carry continuously
5A ac or dc
Make and Carry
(limit L/R
≤
40ms and V
≤
300 volts)
for 0.5 sec
20A ac or dc
for 0.2 sec
30A ac or dc
Break
(limit
≤
5A or
≤
300 volts)
Ac resistive
1250VA
Ac inductive
250VA @ PF
≤
0.4
Dc resistive
75W
Dc inductive
30W @ L/R
≤
40 ms
50W @ L/R
≤
10 ms
Minimum number of operations
1000 at maximum load
Minimum recommended load
0.5W, limits 10mA or 5V
4.5 Status inputs
Status Inputs functionality is fully programmable. The basic I/O module has 3 status inputs these can be set to
high speed for signalling. Additional modules can be added to provide more inputs. Additional inputs are added in-
groups of eight up to a maximum of 27. A pickup timer is associated with each input and each input may be
individually inverted where necessary.
Nominal Voltage
Operating Range
30 / 34
18V to 37.5V
48 / 54
37.5V to 60V
110 / 125
87.5V to 137.5V
220 / 250
175 to 280V
NB: the status input operating voltage does not have to be the same as the power supply voltage.
©2010 Siemens Protection Devices Limited
Chapter 2 Page 5 of 7
Summary of Contents for 7SG12 DAD-N
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