Ammeter for measuring differential or residual currents (up to four simultaneously) using a external toroidal or for the measurement of the line currents (possibly also separate lines between them) using appropriate external CT.
| Technical Characteristics |
CTT-4 | CTT-8 |
| Auxiliary Supply |
| Nominal voltage Us |
110 - 230 - 400 VAC |
| Operating voltage range |
±15% |
| Power consumption |
3VA |
| Frequency |
50 – 60 Hz |
| Voltage Inputs |
| Measurement range | 52…693VAC L-L (30…400VAC L-N) |
|---|
| Method of measuring | True RMS value |
|---|
| Measuring input impedance | 1 MΩ |
|---|
| Method of connection | Single-phase, two-phase, three-phase orbalanced three-phase system |
|---|
| Current Inputs |
| Reference current | 5A |
|---|
| Measurement range | 0,05…5A |
|---|
| Method of measuring | True RMS value |
|---|
| Overload capacity | +30% by an external current transformer |
|---|
| Self-consumption | < 0,5VA |
|---|
| Accuracy |
| Measures | Voltage | - |
|---|
| Current | 0,5% |
|---|
| Power | - |
|---|
| Frequency | - |
|---|
| Active energy | - |
|---|
| Insulation |
| Insulation voltage | 3kVAC for 1 minute |
|---|
| Ambient Condition |
| Operating temperature | -10…+60°C |
|---|
| Storage temperature | -25…+80°C |
|---|
| Housing |
| Version | Flush mount 96 x 96 mm |
|---|
| Degree of protection | IP52 on front - IP20 Housing and terminals |
|---|
| Weight | 500g |
|---|
| Certifications and Compliance |
| Reference standards | IEC/EN 50081-2, IEC/EN 61000-6-2, IEC/EN 61010-1, IEC/EN 61036-1 |
|---|
| Options |
| Order Code |
Description |
| C1 | Auxiliary supply 20÷60 VAC/DC |
| C2 | Auxiliary supply 85÷230 VAC/DC |
|---|
| CT5 | Current inputs by exteral CT 5A |
|---|
| CT1 | Rated current inputs by external CT 1A |
|---|
| DO | 2 digital outputs |
|---|
| A | 1 analog output |
|---|
| Communication Ports |
| 485 | RS485 serial interface |
|---|
