Megger TM1700 Series – Advanced Circuit Breaker Analyser Range
The Megger TM1700 series is a world-class range of Megger Circuit Breaker Analysers engineered for fast, safe, and precise testing of circuit breakers in high-voltage substations and demanding industrial environments. Building on innovations first introduced in the flagship TM1800, the TM1700 family – which includes the Megger TM1710, Megger TM1720, Megger TM1750, and Megger TM1760 – delivers powerful technology in a rugged design.
These instruments are trusted by utilities, service companies, and industrial operators who need reliable condition assessment tools to keep critical power networks running safely and efficiently.
Built for Demanding Environments
High-voltage substations and switchgear yards are noisy, electrically harsh environments. The Megger TM1700 Circuit Breaker Analyser has been developed specifically to withstand these conditions:
- Galvanically isolated inputs and outputs allow all necessary measurements to be performed in a single setup – no need for repeated disconnections and reconnections.
- DualGround™ technology ensures both sides of the breaker remain grounded throughout the test. This patented method enhances operator safety and speeds up the process.
- Active Interference Suppression eliminates errors caused by capacitive coupling, providing highly accurate contact timing and Pre-Insertion Resistor (PIR) values even when interference currents are present.
Simple and Intuitive Operation
Unlike older analysers that required extensive configuration, the Megger TM1700 makes testing straightforward.
- An 8-inch colour touchscreen with on-screen keyboard gives clear visibility, even in bright outdoor conditions.
- Operators can run tests with a simple three-step process: select a template, connect according to the on-screen guide, and initiate measurement.
- Built-in help functions and connection diagrams reduce errors and training requirements.
- Compatible with CABA Win software, providing advanced data analysis, reporting, and test management.
This means even less experienced technicians can achieve reliable results quickly.
The Megger TM1700 Range:
Megger TM1710
- Compact “black box” version
- Includes: 1 × Control section, 1 × Timing Main/Resistor section, 1 × Digital section
- Ideal for applications where basic but reliable analysis is required.
Megger TM1720
- Expanded “black box” version
- Includes: 2 × Control sections, 1 × Timing Aux, 1 × Timing Main/Resistor section, 1 × Digital section
- Suitable for testing breakers with more complex auxiliary circuits.
Megger TM1750
- Fully equipped standalone unit
- Includes: 2 × Control sections, 1 × Timing Aux, 1 × Timing Main/Resistor, 1 × Digital section
- A versatile solution for most utility and industrial testing requirements.
Megger TM1760
- Advanced model in the range
- Equipped with all features of the TM1750 plus 3 additional analogue channels (6 total)
- Perfect for organisations that require comprehensive measurements including motion analysis and auxiliary diagnostics.
Explore the different control panels, from the front interface to the top panel with channel inputs
Key Features at a Glance:
- Reliable testing in noisy substations
- DualGround™ safety – both sides grounded at all times
- High-accuracy timing and resistance measurements
- Easy operation with touchscreen and guided templates
- Robust build, designed for field work
- Full PC integration with CABA Win software
The Control Panel:
- Input for external clamp-on CT.
- Control section:
- Three independent contact functions.
- Pre-set sequences: C, O, C–O, O–C, O–C–O.
- Times a and b auxiliary contacts.
- Measures coil current, voltage, and resistance.
- Timing Aux section:
- Six galvanically isolated channels.
- Works regardless of polarity.
- Handles dry and wet auxiliary contacts.
- Timing M/R section:
- Six inputs.
- High resolution (15 μV) with 40 kHz sampling.
- Times main and parallel resistor contacts.
- Measures resistance of parallel resistors.
- Analogue section:
- Six channels (three optional).
- Works with industrial analogue transducers.
- Insulated channels measure up to 250 V without divider.
- 0.3 mV resolution, 40 kHz sampling.
- Digital section:
- Six channels.
- Supports RS422 incremental transducers.
- ±32,000 pulse resolution.
- 40 kHz sampling.
- Mains input.
- DC output (12 V supply).
- Dynamic Resistance Measurement (DRM).
- Ground terminal.
- Ethernet port.
- USB ports.
- Trigger input:
- Accepts contact make/break or voltage signals.
- DCM interface.
- Navigation buttons:
- Mirror touchscreen functions.
- Control most CABA Local features.
- Touchscreen On/Off.
- On-screen keyboard On/Off.
- Display:
- High brightness, clear even in sunlight.
- Brightness setting.
- Position:
- Shows breaker contact position when coil circuit is connected.
- Sequence:
- Displays next breaker operation.
- Auto-detect enables only valid options.
- Operate/Measure:
- Starts sequence and records data.
- Green “READY” LED must be lit; yellow “OPERATING” LED shows action in progress.
- On/Off switch.
Why Use a Megger Circuit Breaker Analyser?
Circuit breakers are critical for protecting transformers, cables, and other costly equipment. Over time, mechanical wear, lubrication issues, or ageing components can increase the risk of failure. Routine testing with a Megger Circuit Breaker Analyser helps detect issues early, preventing costly outages and equipment damage.
Key benefits include:
- Accurate timing of contacts ensures breakers trip within safe tolerances.
- First trip testing identifies real-world performance, revealing issues like dried grease or corrosion.
- Dynamic resistance measurements verify arcing contacts and interrupter performance.
- Motion and vibration testing highlight mechanical wear before it becomes critical.
By using the Megger TM1700, utilities can move towards condition-based maintenance, reducing downtime and extending the service life of their breakers.
Applications:
The TM1700 range is used worldwide across:
- Transmission and distribution utilities
- Industrial plants with high-voltage equipment
- Service companies performing contract testing
- Power generation sites including renewable energy and conventional stations
Whether you are maintaining SF6, vacuum, oil, or air circuit breakers, the Megger TM1700 series offers the flexibility to handle them all.
Accessories and Expansion
Megger offers a wide selection of accessories for the TM1700 range:
- Motion transducers (linear and rotary)
- DualGround™ modules for enhanced safety
- Dynamic resistance measurement (DRM) kits
- Application kits for first trip and synchronised switching tests
- Specialised cables and mounting kits for different breaker designs
This ensures the analyser can be tailored to any site or breaker type.
What Comes with the Megger TM1700 Series?
Each Megger TM1700 Circuit Breaker Analyser is supplied as a complete test solution, ready for field use. While the exact configuration depends on the model chosen (Megger TM1710, Megger TM1720, Megger TM1750, or Megger TM1760), the following standard items are typically included:
- Main instrument unit – rugged, field-ready housing with touch screen (where applicable).
- Control and timing modules – quantity varies by model, providing contact timing, coil current, and auxiliary measurements.
- Connection cables – high-quality, shielded test leads for accurate results in noisy substation environments.
- Grounding cables – essential for safe DualGround™ testing.
- Ethernet / USB cables – for PC communication and use with CABA Win software.
- Carrying case or transport trolley – designed for safe handling and easy movement on site.
- User documentation and software licence – including connection diagrams, application guides, and a CABA Win licence.
Optional accessories such as motion transducers, dynamic resistance measurement kits, and vibration analysis modules can be added to extend testing capabilities.
❓ Frequently Asked Questions (FAQ)
Q1: What is the difference between the Megger TM1710 and TM1760?
A. The TM1710 is a compact “black box” model with limited sections, suitable for basic testing. The TM1760 includes multiple control and timing sections plus six analogue channels, making it capable of advanced diagnostics such as motion and vibration analysis.
Q2: Is DualGround testing really necessary?
A. Yes. Conventional testing requires removing the ground from one side of the breaker, which can expose operators to dangerous induced currents. DualGround keeps both sides safely grounded throughout the test, improving safety and saving time.
Q3: Can the TM1700 be controlled from a laptop?
A. Absolutely. All models are compatible with CABA Win software, enabling remote operation, data storage, and detailed reporting.
Q4: What breaker types can be tested with the TM1700?
A. The analyser supports testing on SF6, vacuum, oil, and air circuit breakers across transmission and distribution networks.
Q5: How portable is the TM1700 series?
A. The units are built in rugged cases suitable for field use, with intuitive interfaces designed for substation environments.
The Takeaway:
The Megger TM1700 Circuit Breaker Analyser series offers the ideal balance of safety, accuracy, and usability for modern breaker testing. From the compact Megger TM1710 through to the advanced Megger TM1760, the range provides scalable solutions to meet every level of testing requirement.
By investing in the TM1700 range, operators benefit from safer DualGround testing, reliable results in even the harshest substations, and future-proof compatibility with Megger’s expanding suite of accessories.