7SG12 DAD N Performance Specification
1. Introduction
The following document defines the technical and performance specification of the DAD-N Series relays. DAD-N
relays are based upon the VATECH ACP Ltd Modular II series of protection units.
Section 3 describes performance that is common to all Modular II protections.
Section 4 describes the performance of protection elements that may be fitted to DAD-N series relays. Therefore
for any one DAD-N series model, only the performance for those elements described in the Description of
Operation, as available in that model will be applicable.
Performance Data
to:
IEC60255-6, IEC60255-6A and IEC60255-13.
2. Accuracy Reference Conditions
General IEC60255
Parts 6, 6A & 13
Auxiliary Supply
Nominal
Frequency 50
Hz
Ambient Temperature
20°C
3. Accuracy Influencing Factors
Temperature
Ambient range
-10°C to +55°C
Variation over range
≤
5%
Frequency
Range 50Hz
Model
Range 60Hz
Model
47Hz to 52Hz
57Hz to 62Hz
Setting variation
≤
5%
Operating time variation
≤
5%
4. Modular II Specification
4.1 Environmental Withstand
Temperature - IEC 60068-2-1/2
Operating range
-10°C to +55°C
Storage range
-25°C to +70°C
Humidity - IEC 60068-2-3
Operational test
56 days at 40°C and 95% RH
Transient Overvoltage –IEC 60255-5
Between all terminals and earth or between any two
independent circuits without damage or flashover
5kV 1.2/50µs 0.5J
Insulation - IEC 60255-5
Between all terminals and earth
2.0kV rms for 1 min
Between independent circuits
2.0kV rms for 1 min
Across normally open contacts
1.0kV rms for 1 min
High Frequency Disturbance -
IEC 60255-22-1 Class III
Variation
2.5kV Common (Longitudinal) Mode
≤
5%
1.0kV Series (Transverse) Mode
≤
5%
Electrostatic Discharge -
IEC 60255-22-2 Class IV
Variation
©2010 Siemens Protection Devices Limited
Chapter 2 Page 3 of 7
Summary of Contents for 7SG12 DAD-N
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