Siemens SIPROTEC 7SJ62 Instruction Manual

Technical Data
10-20 7SJ62 Manual
C53000-G1140-C121-1
10.7 Sensitive Ground Fault Detection (64, 50Ns, 67Ns)
Displacement Volt-
age Element Char-
acteristics - For all
Types of Ground
Faults
Displacement Voltage, Measured Ve> 1.8 V to 130.0 V (increments 0.1V)
Displacement Voltage, Calculated 3V
O
>10.0 V to 225.0 V (increments 0.1V)
Pickup Delay Time T
Delay Pickup
0.04 s to 320.00 s (increments 0.01 s)
or ∞ (does not pickup)
Additional Trip Delay T
Delay
0.10 s to 40000.00 s (increments 0.01 s)
or
∞ (ineffective)
Measuring time (Inherent Pickup Delay) approx. 60 ms
Dropout Value [0.95 · pickup value] or
[Minimum pickup value – 0.6 V]
Measurement Tolerance
Ve> (measured): 3% of setting value, or 0.3 V
3V
0
> (calculated): 3% of setting value, or 3 V
Operating Time Tolerances 1 % of setting value, or 10 ms
The set times are pure delay times
Phase Detection
for Ground Faults on
an Ungrounded Sys-
tem
Measuring Principle Voltage measurement (phase to ground)
V
PHASE MIN
(ground fault phase) 10 V to 100 V (increments 1 V)
V
PHASE MAX
(healthy phases) 10 V to 100 V (increments 1 V)
Measurement Tolerance 3% of setting value, or 1 V
as per VDE 0435, Part 303
Ground Fault Pick-
up
for All Types of
Ground Faults
Definite Time Characteristic
Pickup Current 50-Ns-1 0.003 A to 1.500 A (increments 0.001 A)
Delay Time 50-Ns-1 0.00 s to 320.00 s (increments 0.01 s)
or
∞ (ineffective)
Pickup Current 50-Ns-2 0.003 A to 1.500 A (increments 0.001 A)
Delay Time 50-Ns-2 0.00 s to 320.00 s (increments 0.01 s)
or
∞ (ineffective)
Inherent Pickup Time ≤ 60 ms (non-directional)
≤ 80 ms (directional)
Dropout/Pickup (ratio) approx. 0.95 for I
Ns
≥ 50 mA
Measurement Tolerance 2 % of setting value or 1 mA
Operating Time Tolerance 1 % of setting value or 20 ms
User-defined Characteristic
user-specified characteristic (defined
by maximum of 20 pairs of current–
trip time values)
Pickup Current 51 Ns 0.003 A to 1.400 A (increments 0.001 A)
Time multiplier 51 Ns 0.10 to 4.00 (increments 0.01)
or ∞ (ineffective)
Pickup Threshold approx. 1.10 · I
Nsp
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Siemens SIPROTEC 7SJ62 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SJ62
Category	Relays
Language	English