TAS-331DG
Description
1. Product Overview
2. Key Features
Dual Function Measurement: Selectable active power (P) or reactive power (Q).
High Accuracy: Class 0.5 (±0.5% FS) per IEC 688, operating from –10 °C to +55 °C.
Ultra‑Wide Input Voltage: Up to 690 VAC (L‑L) direct connection.
Flexible Current Input: CT selectable 0.75 / 1.5 / 3.0 / 6.0 A; measurement range 0–200% In.
Universal Auxiliary Supply: 57–690 VAC or 24–220 VDC.
Configurable Output: 4–20 mA (default) or 0–10 V; supports up to 3 output slopes.
Excellent Calibration Stability: No mechanical potentiometers; long‑term drift‑free performance.
PC Programmable: Free DEIF PC tool for range, type, and scaling configuration.
Global Approvals: CE, IEC 61010‑1, UL 61010‑1, DNV/GL, ABS, LR, CCS.
Compact & Rugged: 35 mm DIN rail or base plate mounting; IP40 housing, IP20 terminals.
3. Technical Specifications
3.1 General
| Parameter | Specification |
|---|---|
| Model | TAS‑331DG |
| Manufacturer | DEIF A/S |
| Measured Quantity | Active power (P) / Reactive power (Q) |
| Accuracy Class | 0.5 (±0.5% FS @ 15–30 °C) |
| Linearity | ≤ ±0.2% FS |
| Response Time | ≤ 40 ms (95% of final value) |
| Frequency | 50 / 60 Hz (45–65 Hz range) |
| Phase Angle Influence | ≤ ±0.75° |
3.2 Input Ratings
| Parameter | Specification |
|---|---|
| Voltage Input (Vn) | 57 / 100 / 110 / 230 / 400 / 440 / 690 VAC (L‑L) |
| Current Input (In) | 0.75 / 1.5 / 3.0 / 6.0 A (CT secondary, selectable) |
| Continuous Overload | 120% Vn / 20 A (current) |
| Short‑Time Overload | 200% Vn / 75 A for 10 s; 240 A for 1 s |
3.3 Output Ratings
| Parameter | Specification |
|---|---|
| Analog Output | 4–20 mA (default) or 0–10 V (configurable) |
| Output Load (Current) | ≤ 750 Ω |
| Output Load (Voltage) | ≥ 500 Ω |
| Ripple | ≤ 0.2% FS |
| Isolation | 2.5 kVAC (input / output / supply) |
3.4 Power Supply
| Parameter | Specification |
|---|---|
| Auxiliary Supply | 57–690 VAC ±10%, 50/60 Hz / 24–220 VDC ±20% |
| Power Consumption | ≤ 5 VA |
3.5 Environmental & Mechanical
| Parameter | Specification |
|---|---|
| Operating Temperature | –10 °C to +55 °C |
| Storage Temperature | –40 °C to +85 °C |
| Humidity | 5–95% RH non‑condensing |
| Protection Class | IP40 (housing), IP20 (terminals) |
| Dimensions (W×H×D) | 72 × 90 × 110 mm |
| Weight | Approx. 650 g |
| Mounting | 35 mm DIN rail or base plate (2 × M4 screws) |
| Terminal Wire Size | Max. 2.5 mm² (stranded) / 4.0 mm² (solid) |
4. Application Scope
Marine Genset Monitoring: Active/reactive power measurement for shipboard generators and switchboards。
Industrial Power Monitoring: Power consumption monitoring in factories, substations, and data centers。
Generator Paralleling: Load sharing and reactive power balance control in parallel genset systems.
Power Factor Correction (PFC): Reactive power monitoring for capacitor bank control.
Energy Management: Data acquisition for energy billing, efficiency analysis, and peak load management。
Renewable Energy: Solar/wind farm grid‑tie power monitoring.
5. Installation & Wiring
5.1 Installation Requirements
Mounting: Install vertically on a 35 mm DIN rail or base plate; allow ≥25 mm clearance above/below for ventilation。
Environment: Avoid direct sunlight, dust, moisture, corrosive gases, and strong electromagnetic fields.
ESD Protection: Discharge static before handling (PCB is ESD‑sensitive).
5.2 Terminal Wiring
5.2.1 Input Terminals (Voltage & Current)
| Terminal | Description |
|---|---|
| L1 / L2 / L3 | 3‑phase voltage input (Vn) |
| N | Neutral (for 4‑wire systems) |
| CT1 / CT2 / CT3 | Current transformer inputs (0.75–6 A) |
5.2.2 Output Terminals
| Terminal | Description |
|---|---|
| +OUT / –OUT | Analog output (4–20 mA or 0–10 V) |
5.2.3 Power Supply
| Terminal | Description |
|---|---|
| AC(L) / AC(N) | 57–690 VAC supply |
| +DC / –DC | 24–220 VDC supply |
5.3 Wiring Notes
CT Wiring: Never open‑circuit CT terminals (risk of lethal high voltage).
Voltage Input: Use fused voltage inputs (gG‑type fuse, 2 A).
Cable Size: 1.5 mm² (control/output circuits); 2.5 mm² (main input circuits)。
Terminal Torque: Tighten to 0.8–1.0 Nm.
Shielding: Use shielded cable for analog output; ground shield at one end only.
Isolation: Ensure proper isolation between input, output, and supply circuits.
6. Operation & Configuration
6.1 Front Panel Indicators
PWR: Solid green = power supply OK.
RUN: Flashing green (1 Hz) = normal operation.
FAULT: Solid red = input overload / CT open / wiring error / config fault.
6.2 Configuration Steps (PC Tool)
Connect: Use DEIF USB‑to‑RS485 adapter to connect transducer to PC.
Install: Download and install DEIF Transducer Configuration Tool (free from www.deif.com).
Select Model: Choose TAS‑331DG from the device list.
Set Parameters:
Measurement Type: Active power (P) or Reactive power (Q).
CT Ratio: 0.75 / 1.5 / 3.0 / 6.0 A.
VT Ratio: Primary / Secondary (e.g., 10 kV / 100 V).
Output Mode: 4–20 mA or 0–10 V.
Range: Set full‑scale value (e.g., 0–1000 kW).
Slope: Select 1 / 2 / 3 output slopes.
Write Config: Download settings to transducer.
Verify: Apply input; check RUN LED and output signal.
6.3 Normal Operation
Measurement: Transducer computes true active/reactive power from voltage and current inputs.
Output Signal: Proportional analog output (4 mA = 0 kW, 20 mA = full scale).
Fault Condition: FAULT LED ON; output holds last valid value or goes to 0 mA.
7. Safety Precautions
High Voltage Hazard: Only qualified electricians may install/service. Disconnect all power before wiring.
CT Hazard: Never open‑circuit CT terminals (lethal high voltage risk).
Overload: Do not exceed 120% of rated input voltage/current.
Isolation: Do not remove or modify internal isolation barriers.
Environmental Limits: Operate only within –10 °C to +55 °C.
No Unauthorised Modification: Do not open the enclosure; voids warranty.
8. Maintenance
8.1 Regular Maintenance (Every 12 Months)
Visual Inspection: Check for loose terminals, damaged wiring, or discolouration.
Cleaning: Wipe front panel with dry cloth; remove dust from vents.
Terminal Tightness: Retorque to 0.8–1.0 Nm。
Function Test: Inject known voltage/current; verify output accuracy.
Insulation Resistance: Measure ≥1 MΩ @ 500 VDC between input/output and ground.
9. Troubleshooting
| Fault Phenomenon | Possible Cause | Solution |
|---|---|---|
| PWR LED Off | No supply / wrong voltage | Check wiring; verify supply voltage. |
| FAULT LED On | Input overload / CT open / wiring error | Reduce input; check CT wiring; verify connections. |
| No Output | Output wiring error / overload | Check output wiring; reduce load resistance. |
| Inaccurate Reading | CT/VT ratio wrong / configuration error | Correct PC tool settings; verify system configuration. |
| Output Fluctuates | Unstable input / loose terminals | Stabilise input; retighten terminals. |
10. Warranty & Disclaimer
Model: TAS‑331DG Selectable AC Transducer (Active/Reactive Power).
Warranty Period: 24 months from delivery (normal installation/use per manual).
Warranty Exclusions: Misuse, overvoltage, lightning, water ingress, unauthorised modification, or CT open‑circuit.
Specifications Subject to Change: Manufacturer reserves the right to update specifications without notice.
Documentation Version: 1.0 (2026); latest manual available at www.deif.com.
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