The NDB CTTx5 is a rugged, user-friendly automatic current transformer (CT) tester manufactured by NDB Technologies. It is designed for commissioning and maintenance of power systems and can perform a comprehensive suite of tests on current transformers with up to five taps.
Here’s a summary of its key features and technical specifications:
Key Features:
Technical Specifications:
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Key Features:
- Tests Performed: Measures CT ratio, phase shift, polarity, excitation/saturation, winding resistance, and insulation resistance using the voltage method, compliant with ANSI/IEEE C57.13.1 & IEC 60044-1 standards. It also performs burden testing by injecting current into the secondary loop. Can also test voltage transformers.
- Automatic Testing: All tests are performed in an automatic sequence. Manual mode is available for troubleshooting and diagnostics.
- Multi-Tap Testing: The CTTx5 has five X inputs, allowing testing of CTs with up to 4 windings without disconnecting and reconnecting test leads.
- User Interface: Features a large, high-resolution color LCD display, a full QWERTY keypad for easy data entry, intuitive menus, and function buttons.
- Data Management: Large internal memory for storing up to 200 test files (with up to 10 excitation curves per file) and 140 test plans. Includes Report Managerâ„¢ PC software for creating test reports and data analysis. Data can be stored internally and on a USB memory stick.
- Built-in Printer: Has a 40-character thermal printer for immediate results.
- Rugged Design: Housed in a waterproof case (IP-67/NEMA 6) with wheels and a retractable handle for portability in demanding field environments.
- Safety Features: Includes automatic demagnetization sequence.
- Connectivity: USB and RS-232C ports for PC communication.
Technical Specifications:
- Power Input: 115 VAC or 230 VAC ± 10%, 50/60 Hz
- Fuse Rating: 15 A or 8 A, 250 VAC (Type F)
- Voltage Output: 0-50V / 0-200V / 0-600V @ 2A; 0-1200V @ 1.5A; 0-2000V @ 1.2A
- Voltage Reading: Up to 1999.9 V ± 0.1% (in three ranges)
- Current Reading: 0 to 1.9999 A RMS ± 0.5%
- Ratio and Accuracy:
- 0.80 to 1000:1 ± 0.5%
- 1000 to 2000:1 ± 0.5%
- 2000 to 5000:1 ± 1%
- 5000 to 10000:1 ± 1%
- Measurement Method: ANSI / IEEE C57.13.1, IEC-60044-1
- Phase Angle: ±180 Degrees / 0.0 to 359.9 degrees ± 1 degree
- Winding Resistance: 0-1.9999 ohms ± 1%, 2-19.999 ohms ± 1%
- Insulation Resistance: 2 M to 1 G-ohms ± 3% (user-selectable test duration: 10 to 60 seconds)
- Current Source: 0-20 A @ 20 VAC Continuous
- Current Source Display: 19.999 A rms ± 1%, 19.999 Vrms ± 1%, 1 Mohm to 1000 ohms (Load burden display)
- Data Storage: Up to 200 files with up to 10 excitation curves per file, 140 test plans
- Display: 120 mm x 90 mm (4¾ x 3½ inches) bright color LCD
- Printer: 40 characters, 80 mm (3.12 inches) commercial thermal paper
- Operating Temperature: -10°C to +50°C (+14°F to +122°F)
- PC Connection: USB, RS-232C, USB memory stick
- Dimensions: 46.8 cm x 35.5 cm x 19.3 cm (18.4 in x 13.8 in x 7.5 in)
- Weight: 24.94 kg (55 lbs.)
- Memory Stick: 100 MB+
- Approvals: EN 61010:2001, EN 61326-1:1997 Class A
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