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BETA Measuring
Three-Phase Measuring Devices
7
KT1 5 E-counters
11/20
Siemens ET B1 · 10/2008
11
Display
•
Connection errors
Discernible from phase-sequence
indication
Yes
•
Active energy: 1 display, 7-digit
+ display import or export (arrow)
kWh
000000.0 ... 999999.9
•
Reactive energy: 1 display, 7-digit
+ display import or export (arrow)
kvarh 000000.0 ... 999999.9
•
Active power: 1 display, 3-digit
+ display import or export (arrow)
kW or
MW
000 ... 999
•
Reactive power: 1 display, 3-digit
+ display import or export (arrow)
kvar or
Mvar
000 ... 999
•
Instantaneous rate measurement:
1
display, 1-digit
For 7KT1 500, 7KT1 501, 7KT1 502,
7
KT1 503
1
For 7KT1 510, 7KT1 511, 7KT1 512,
7
KT1 513, 7KT1 520, 7KT1 521
1
or 2
•
Display rate identifier
For 7KT1 510, 7KT1 511, 7KT1 512,
7
KT1 513, 7KT1 520, 7KT1 521
T1 or T2
•
Transformer primary current
Adjustable in 5 A steps
A
--
5 ... 5000
•
Display period
/
s
2
•
Storage of setting and energy values
EEPROM
Measuring accuracy
•
Active energy acc. to IEC 62053-21
Class 2
•
Reactive energy acc. to IEC 62053-23
Class 3
•
Active or reactive power
%
± 2 ... 4 ± 1 digit
S0 interfaces
Acc. to IEC 62053-31
Class A
•
Terminal output
For 7KT1 500 fixed
Imp/kWh 10
--
For 7KT1 502, 7KT1 510, 7KT1 512
For direct connection 63 A, adjustable
Imp/kWh 10 – 1 – 0.1 – 0.01 – 0.001 --
For 7KT1 501 fixed
Imp/kWh --
1
For 7KT1 503, 7KT1 511, 7KT1 513
depending on the transformer factor,
adjustable
Imp/kWh --
10 – 1 – 0.1 – 0.01 – 0.001
•
Pulse duration
ms
125 ... 300
•
Minimum interval between 2 pulses
ms
300
•
Required voltage
V DC 5 ... 30
•
Current ON/OFF
mA
10 ... 27/0 ... 2
LAN interface
Only for 7KT1 520, 7KT1 521
•
Terminals
+, –, shielding
Safety acc. to EN 61010-1
•
Degree of pollution
2
•
Overvoltage category
II
•
Operational voltage
V
600
•
Clearances
mm 3.0
•
Creepage distances
In device
mm 4.3
On printed boards (not installed)
mm 3.0
•
Test pulse voltage
1.2/50
s
kV
4
•
Test voltage
50
Hz, 1 min
kV
2.2
Terminals
•
Main current paths
±
screw (Pozidriv)
2
1
•
Supply and control terminals
Blade for slotted screw
mm ×
mm
0.4
× 2.5
•
Conductor cross-sections, main current paths Rigid, max.
mm
2
1
× 25 or 2 × 16
1
× 6 or 2 × 4
Rigid, min.
mm
2
1
× 1.5
1
× 0.95
•
Conductor cross-sections supply and
control terminals
Rigid, max.
mm
2
1
× 2.5 or 2 × 1.5
Flexible, with end sleeve, minimum mm
2
0.75
Ambient conditions
•
Ambient temperature
°C
0 ...
+55
•
Relative humidity
Storage
%
80
•
Vibration
Sinus amplitude at 50 Hz
mm
±
0.25
•
Degree of protection
(
terminal area)
IP40 (IP20)
•
Safety class
Acc. to EN 61010-1
II
7
KT1 500, 7KT1 502,
7
KT1 510, 7KT1 512,
7
KT1 520
7
KT1 501, 7KT1 503,
7
KT1 511, 7KT1 513,
7
KT1 521
© Siemens AG 2008