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CCT 31.3 U - Allstromwandler AC/DC

primary current

measuring range	0…300 A DC / AC Ieff, variant-dependent! (rated current ranges set to standard values acc. to IEC)
frequency range	0…100 kHz, any signal waveforms
Voltage output with AC input signal:	2,5 ± 1 V, Ueff, AC; 2,5 ± 1,414 V (peak-to-peak)
Voltage output with DC input signal	2,5 ± 1 V, DC
Min. burden resistance at voltage output	RB ≥ 100 kΩ
Output signal limitation in case of overload	< 5 V
Accuracy	± 0,5 %
Max. operating voltage Um	0,72 kV, Ueff
Insulation test voltage	6,4 kV, Ueff, 50 Hz, 5 sec., primary conductor against measuring output/housing
auxiliary voltage	± 12 V DC, ± 15%, < 70 mA, external protection via fine fuse 100 mA / 250 V, fast!
Step response time (90 % IPN, di/dt = 100 A / μs)	≤ 1 μs (typ. 150 ns)
Signal rise rate di/dt	< 100 A / μs
Insulating material class	E
Operating altitude	≤ 2000 m (DIN EN 61010-1)
Max. temperature of primary conductor	100° C
Humidity	0…95% rel. humidity, no condensation!

Product information

Current transformer for measuring both DC and AC currents

Applied technical standards:

DIN EN 50178, 1997
DIN EN 61010-1, 2002
VDE 0160

Electrical connections:

UH + UH - 0 (Ground) IA
Spring-loaded terminal
Connection cross-sections: 0,08…2,5 mm²

Functions of the CCT 31.3 U:

The magnetic field surrounding a current-carrying conductor is detected by a measuring core enclosing the conductor. The magnetic flux induced in the measuring core, which is directly proportional to the current in the primary conductor, is detected by means of a semiconductor component. Control electronics integrated in the device convert the signal supplied by the semiconductor into an output voltage signal directly proportional to the time profile of the measured variable.
Due to the inductive, contactless detection of the measured variable, a galvanically isolated output signal is provided.
The electrical contacting of the secondary circuit of the current transformer is carried out via a 4-pole spring-loaded terminal. This terminal is suitable for connecting flexible stranded wires up to 2,5 mm².
A DC auxiliary power supply of ± 12 V is required to supply the control electronics. The auxiliary voltage inputs must be protected by a fine fuse 100 mA / 250 V / F.

Advantages and benefits of the CCT 31.3 U:

Measurement of both DC and AC currents possible with only one current transformer.
Wide operating frequency range from 0 Hz (DC)…100 kHz (AC).
High electrical safety due to galvanically isolated detection of the measured variable.
Low power requirement (≤ 2,5 VA)
Simple and safe electrical wiring using spring-loaded terminal technology.
Direct mounting on busbars via fastening screws integrated in the device.
Mounting on 35mm DIN rails possible using optional snap-on mounting.
High climatic and mechanical resistance due to PU encapsulation of all electrical components.

3D models and more files to each product can be found in our download area downloadarea

Properties

measuring range	0…300 A DC / AC Ieff, variant-dependent! (rated current ranges set to standard values acc. to IEC)
frequency range	0…100 kHz, any signal waveforms
Voltage output with AC input signal:	2,5 ± 1 V, Ueff, AC; 2,5 ± 1,414 V (peak-to-peak)
Voltage output with DC input signal	2,5 ± 1 V, DC
Min. burden resistance at voltage output	RB ≥ 100 kΩ
Output signal limitation in case of overload	< 5 V
Accuracy	± 0,5 %
Max. operating voltage Um	0,72 kV, Ueff
Insulation test voltage	6,4 kV, Ueff, 50 Hz, 5 sec., primary conductor against measuring output/housing
auxiliary voltage	± 12 V DC, ± 15%, < 70 mA, external protection via fine fuse 100 mA / 250 V, fast!
Step response time (90 % IPN, di/dt = 100 A / μs)	≤ 1 μs (typ. 150 ns)
Signal rise rate di/dt	< 100 A / μs
Insulating material class	E
Operating altitude	≤ 2000 m (DIN EN 61010-1)
Max. temperature of primary conductor	100° C
Humidity	0…95% rel. humidity, no condensation!