Allstromsensitive Differenzstromsensoren (DI-Sensoren) Seite 1 von 7
AC/DC-sensitive Differential Current Sensors (DI-Sensors)
• Closed loop sensors with magnetic probe for
highest accuracy and reliability
• Differential current range typically 30 to 300
mA
• Full load current to 50 A
• Single +5 V voltage supply
• Voltage output for direct connection at A/D –
converters
• Automatic demagnetization of the sensor core
for offset decrease
• Self-monitoring and test functions
• Measuring accuracy 1.5%
• Smallest temperature drift, highest long-term
stability
• Metal screen against external fields
• Frequency range DC to 10 kHz
• Variants with passing through opening and with
integrated primary conductors, with or without
test winding
• Active sensors with integrated electronics
• Economical construction
Applications
Control devices with AC/DC-sensitive differential current sensors are
used primarily in transformerless solar inverters. An important safety
function of these
devices is the monitoring of the leakage current of the entire system from photovoltaic - modules and inverter against
earth. A defective system can become dangerous for people or release fires. Before it comes so far, the inverter must
disconnect from the grid. The leakage current contains DC and AC components. Therefore an AC/DC-sensitive
monitoring unit is necessary. Their heart is the VAC differential current sensor, whose output voltage is evaluated by
the control system of the solar inverter.
Generally protection devices with AC/DC-sensitive differential current sensors can be used everywhere, where flat or
pulsating DC can develop, whose amount is permanently greater than zero. Further examples are power supplies
producing high DC voltages or uninterruptable power supplies.
Variants of the VAC Sensors
It is both a type available with an opening for the primary conductor, as well as types with built-in primary conductors
for PCB mounting. There are versions with two or four conductors for single and three phase systems.
The additional functions demagnetization, error signaling and internal test power are accessible through defined
levels at the inputs / outputs Vout and Vref.
Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 2 of 7
Functional description, technical data, available Types
Item no.
T60404
-
N4646
-
… X950
… X960
… X975
…X976
Dimensional diagram no
.
1
2
3
4
Primary conductor style
opening
via PCB. Two
conductors
A= 6,2 mm² for
operating current
via PCB. Two
conductors
A= 6,2 mm² for
operating current,
one conductor for
external test current
via PCB. Four
conductors
A= 4,9 mm² for
operating current,
one conductor for
external test current
Properties
Suppl
y voltage
5 V
Supply current
typ. 17 mA
Maximum primary current
50 A
Nominal differential current
300 mA
Output voltage
reference voltage ± (0,74 x differential current / 300 mA)
Measuring range
± 850 mA
Output voltage range
0,5 V … 4,5 V
Reference
voltage
2,5 V reference voltage, internally generated or
Vref=
1.4 to 3.5
from external source
Frequency range
0 … 10 kHz, limited by internal low pass filter. An additional external filter with e.
g
. 5 kHz roll off
frequency is recommended.
Measuring erro
r
at T
amb
= 25°C < 1,5 % of nominal differential current
Temperature drift
-40 … +85°C < 0,1 mV/°C
Response time
(up to 90% of nominal differential
current)
< 35 µs
Isolation strength
acc. to EN50178 (primary- and
test current conductor vs. signal
and supply voltage connections)
- system voltage
- working voltage
to be maintained by
a proper insulation of
the primary onductor
600 V
1.000 V
Additional functions
Error condition
- indicated by
- critieria
- output voltage < 0,5 V
- break or short circuit of the magnetic probe, supply voltage smaller 4 Volts, during the
demagnetization cycle.
Demagnetization
of the Sensor core
- triggered by
- duration of cycle
- feeding the supply voltage or transition from <1 V to 2,5 V (normal voltage) at the reference
voltage input, i.e. after test current cycle
- 120 ms
Internal DC test current
for self test
- triggered by
- output signal at test current
- setting reference voltage to 0 V (<1 V)
- U
DC
= +0,25 V at V
ref
= 0 V. A possibly appearing primary current is superimposed
Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 3 of 7
Maßbilder
Maßbild Nr. 1 Typen
T60404-N4646-X950
Marking
:
Connections
:
UL Mark 1 … 4: 0,7 x 0,6 mm
Excerpt from
Item no.
F DC, in which
F = Factory
DC = Date Code Pin Assignments
1 Vc +5 V
2 GND
3 V
ref
In/Out
4 V
out
41,75±0,25
41,35±0,25
25,8
19,2
12,3
7,7
Toleranz der Stiftabstände
±0,2mm
(Tolerances grid distance)
DC = Date Code
F = Factory
F DC
27,94
2x2,54
7,0
3,5-0,5
1 2 3 4
0,7x0,6
0,5
8,8
I
P
Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 4 of 7
Maßbild Nr. 2 Typ
T60404-N4646-X960
46
40,64
17,94
43
6,8
2x2,54
27,94
6,8
Toleranz der Stiftabstände ±0,2mm
(Tolerances grid distance)
0,5
26,9 3,5±0,5
Ø2,8
0,6x0,7
Beschriftung
(marking)
F DC
DC = Date Code
F = Factory
12
3
4
5 8
Marking
:
Connections
:
UL Mark 1 … 4: Ø 2,8 mm
Excerpt from 5 … 8: 0,7 x 0,6 mm
Item no.
F DC, in which
F = Factory
DC = Date Code
Pin Assignments
1 … 4: primary current
5 V
out
6 V
ref
7 GND
8 Vc +5 V
Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 5 of 7
Maßbild Nr. 3 Typ
T60404-N4646-X975
Marking
:
Connections
:
UL Mark 1 … 4: Ø 2,8 mm
Excerpt from 5 … 8: 0,7 x 0,6 mm
Item no. 9, 10: Ø 0,8 mm
F DC, in which
F = Factory
DC = Date Code
Pin Assignments
1 … 4: primary current
9, 10: test current
5 V
out
6 V
ref
7 GND
8 Vc +5 V
B 4406-C150
Toleranz der Stiftabstände ±0,3mm
(Tolerances grid distance)
DC = Date Code
F = Factory
Beschriftung
(marking)
F DC
46
43
6,8 10,57
27,94
2,54
2x2,54
41,5
0,5
18,8
1 2
3
4
5
8
9
10
7
Prüfmaß
(test dimension)
40,64
10,46
8,89
17,94
26,8 3,5±0,5
Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 6 of 7
Maßbild Nr. 4 Typ
T60404-N4646-X976
Marking
:
Connections
:
UL Mark 1 … 4: 0,6 x 0,7 mm
Excerpt from 5 … 6: Ø 0,8 mm
Item no. 7 … 14: Ø 2,5 mm
F DC, in which
F = Factory
DC = Date Code
Pin Assignments
1 Vc +5 V
2 GND
3 V
ref
4 V
out
5, 6: test curent
7 … 14: primary current
Toleranz der Stiftabstände
Pin 1....6 = ±0,2mm
Pin 7...14= ±0,3mm
(Tolerances grid distance)
DC =Date Code
F =Factory
Prüfmaß
(test dimension)
72,5
43,1
20,35
20,8
1
2
4
5
6
7
8
9
10
11
12
13
14
2x2,54
27,94
8,89
2,54
1,52
3,5±0,5
67,5
15,35
56,5
21,23
16,53
27
Beschriftung
(marking)
3,5±0,5
Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 7 of 7
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Published by VACUUMSCHMELZE GmbH & Co. KG, Hanau
© VACUUMSCHMELZE 2012. All rights reserved.
As far as patents or other rights of third parties are concerned, liability
is only assumed for products per se, not for applications, processes and
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T60404-M4645-X150 T60404-M4645-X160 T60404-M4645-X170 T60404-N4646-X950 T60404-N4646-X960
T60404-N4646-X975 T60404-N4646-X956 T60404-Q5790-X101 T60404-N4646-X970 T60404-N4644-X300 T60404-
Q5790-X800 T60404-N4646-X401