LQ-905 Intelligent CT/PT Calibrator - Precision Transformer Testing Instrument
Product Overview
The LQ-905 Intelligent CT/PT Calibrator is an advanced testing instrument designed for precision measurement of transformer ratio errors, polarity verification, and impedance admittance in current and potential transformers. This professional-grade equipment combines DSP technology with intuitive operation for reliable field and lab testing.
Technical parameters
| Equipment operating environment | temperature：5℃～40℃ | relative humidity：<80%(25℃时) |
| altitude：<2500m | ||
| mains frequency：50Hz±0.5Hz | mains input：220V±5V | |
| range of measurement | cophase component(%)：0.0001～200.0 | distinguishability：0.0001 |
| orthogonal component(part)：0.001～700.0 | distinguishability：0.001 | |
| impedance(Ω)：0.0001～20.0 | distinguishability：0.0001 | |
| admittance(ms)：0.0001～20.0 | distinguishability：0.0001 | |
| intrinsic error | cophase component | ΔX=±(X×2%＋Y×2%)±Dx(Level 1 is optional) |
| orthogonal component | ΔY=±(X×2%＋Y×2%)±Dy(Level 1 is optional) | |
| "X"、"Y"——Display value of instrument | ||
| "Dx,Dy"——Display value of instrument | ||
| Dx=2，Dy=5 | ||
| dial indicator | PETS2(Level 1 is optional) | |
| working range | electricity | (1%～149%)In (In =5A) |
| (5%～149%)In (In =1A) | ||
| voltage | (5%～149%)Un (Un =100V，150V，100V/) | |
| (5%～149%)Un (Un =100V/3) | ||
| workload | electricity | TO to TX＜0.12Ω cosΦ=1 |
| voltage | a to x＜0.25VA (100V) | |
| Polarity error indication | When the operating current (voltage) reaches more than 5% of the rated current (voltage) and the error exceeds 180%, there should be polarity indication. | |
| Note: if it is more than 10% of the rated operating current (voltage), there is still no proper polarity indication, indicating a fault. Please do not increase the current (voltage) to avoid burning out the instrument. | ||
| Variable ratio error indication | When the operating current (voltage) reaches more than 5% of the rated current (voltage) and the error exceeds 30% but is less than 180%, the error indication of variable ratio should be given. | |
| Insulation and voltage test and instructions | terminalTX( )Terminal is same | |
| The power socket can withstand the housing1.5kV，1minwithstand voltage | ||
Key Features
High-Resolution Display
320×240 lattice LCD with long-life backlighting for clear visibility in all lighting conditions
Automatic Diagnostics
Automatically detects polarity errors and calculates ratio errors with precision
Measurement Excellence
Solves S-class measurement challenges with automatic range switching capability
Regulatory Compliance
Fully meets JJG314-1993 and JJG314-1994 standards requirements
Advanced Technology
DSP-Enhanced Circuitry: Combines advanced circuit design with digital signal processing for stable measurements
Virtual Instrument Function: Upper computer software expands testing capabilities
Automatic Range Selection: Eliminates manual switching errors
S-Class Resolution: Handles precise measurement requirements for high-accuracy transformers
Typical Applications
Power Substations
Field verification of CT/PT transformer accuracy
Manufacturing QC
Production line testing of transformer components
Calibration Labs
Reference standard for instrument calibration
Maintenance Teams
Periodic verification of installed transformers
Operation Highlights
User-friendly Chinese interface with intuitive navigation
Large-font display of percentage difference and angle difference
Automatic sampling function reduces operator intervention
Micro printer compatibility for report generation
