Megger SDRM201 Resistance Measurement Accessory
A perfect accessory for the TM1700, 1800 & EGIL Series
The Megger SDRM201 is a specialised accessory designed to work with Megger’s industry-leading circuit breaker analysers, including the TM1700, TM1800, EGIL, and EGIL200 series. Engineered for high-voltage substations and demanding industrial environments, the SDRM201 enables both static and dynamic resistance measurement (SRM and DRM) on circuit breakers and other low-resistive devices.
By measuring the test current and voltage drop across circuit breaker contacts, the SDRM201 calculates resistance as a function of time. This capability provides vital insight into the condition of breaker contacts, ensuring accurate diagnosis, safe operation, and reduced downtime.
Key Features of the Megger SDRM201
- Enables Resistance Measurement – Accurately tests circuit breakers with static and dynamic analysis.
- Lightweight and Compact – Easy to handle, transport, and connect.
- Quick Connectors – Saves time with fast cable connections.
- Flexible Current Cables – Designed to remain manageable even in cold conditions.
- High Test Current – Up to 200 A initial test current for precise measurement.
- Adaptable Configurations – Supports single-phase and three-phase testing depending on the connected analyser.
Technical Specifications
| Feature | Details |
| Measurement Range | 0–32 mΩ (DRM), up to 6 mΩ (SRM with TM1700/TM1800) |
| Accuracy | ±1% ±1 μΩ (TM1700/TM1800), ±1.5% ±1 μΩ (EGIL200) |
| Operating Temperature | -20 °C to +50 °C |
| Weight | 1.3 kg (2.9 lbs) unit only; 9.4 kg (20.7 lbs) including case and accessories |
| Maximum Test Current | 200 A instantaneous, 140 A after 1 second |
| Protection Rating | IP43 (unit with cable connected) |
Why Choose the Megger SDRM201?
Routine testing of high-voltage circuit breakers is critical for safety and reliability. With the Megger SDRM201 Resistance Measurement Accessory, engineers and technicians gain:
- Precise and repeatable data for breaker diagnostics
- Reduced risk of unplanned outages
- Confidence in breaker performance under load
- Compatibility with Megger’s trusted analyser platforms
Whether for commissioning, maintenance, or troubleshooting, the SDRM201 is a reliable investment for power utilities and industrial facilities.
What comes with the Megger SDRM201?
Depending on the version ordered, the Megger SDRM201 package typically includes:
- (GB-03412) 1 x SDRM cable
- (GA-12812) 1 x SDRM multi cable extension
- (HC-04211) 1 x DC supply
- (GA-12820) 2 x Current cable - red
- (GA-12830) 2 x Current cable - black
- (GA-00208) 1 x Ground cable
❓ Frequently Asked Questions (FAQ)
Q1: What analysers are compatible with the Megger SDRM201?
A. It works with Megger TM1700, TM1800, EGIL, and EGIL200 analysers. Some models require the SDRM option or software licence.
Q2: Can the SDRM201 perform both SRM and DRM tests?
A. Yes, it supports both static and dynamic resistance measurement.
Q3: What is the maximum test current the SDRM201 can deliver?
A. The unit provides up to 200 A instantaneous test current, with 140 A sustained for 1 second.
Q4: Is the SDRM201 suitable for use in cold environments?
A. Yes, it is designed to operate down to -20 °C, with cables that stay flexible at low temperatures.
Q5: How portable is the unit?
A. The main unit weighs just 1.3 kg, and even with cables and case included, the system is only 9.4 kg in total.