Contact Resistance Meter CRM 200A (Model QCRM-200)

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Contact Resistance Meter CRM 200A (Model QCRM-200)

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Contact Resistance Meter CRM 200A (Model QCRM-200) Specification

Input
Standard power cable socket

Housing Material
Reinforced aluminium alloy

Measuring Units
Micro-ohms ()

Operating Temperature
0C to 50C

Stability
High output current stability

Response Time
<2 seconds

Protection
Overload, short-circuit protected

Sensitivity
High sensitivity, low noise digital measurement

Temperature Range
0C to 50C operating, -10C to 60C storage

Measurement Range
0-1999

Process Connection
Heavy-duty output terminals

Application Media
High current contact resistance measurement

Output
200A

Connecting Type
4-terminal measurement

Storage Temperature
-10C to 60C

Current Range
0-200 A DC

Frequency
50 Hz supply

Color
Black/Silver

Cut Size
Standard handheld case

Connectivity Type
4-wire Kelvin Connection

Mounting
Portable, case-mounted

Language
English labels and interface

Model
QCRM-200

Resolution
1

Load Capacity
200A continuous rating

Dimension (L*W*H)
Approx. 400 mm x 300 mm x 210 mm

Sensor Type
Electrical, 4-wire method

Material
Industrial reinforced carrying case

Power Supply
230V AC, 50 Hz

Power Consumption
Approx. 1000 VA

Accuracy
0.5% of reading 2 digits

Display Type
Digital LED display

Range
0-1999

Safety Features
Fused input protection

Output Signal Type
Direct reading, digital display

Test Current
Up to 200A DC (user-selectable)

Application
Measurement of contact resistance in circuit breakers and switches

Equipment Type
Contact Resistance Meter (CRM, 200A)

Weight
Approx. 15 kg

About Contact Resistance Meter CRM 200A (Model QCRM-200)

Max Test Current	200 A
Resistance Range	0.1 200 m
Application	Isolator, Shunts, Circuit Breaker, Disconnector, Busbar Joint, Switchgear
Display Type	Digital
Test Method	4 Wire
Power Supply	230 V AC
Data Storage	No Memory

We offer high-precision Contact Resistance Meters designed for accurate measurement of low resistance values in electrical contacts and conductive joints.

These instruments are widely used for testing circuit breakers, switchgear, busbars, disconnectors, cable joints, and other electrical connections to ensure optimal performance and system reliability.

The Contact Resistance Meter helps identify loose connections, corrosion, contact deterioration, and other defects that may cause overheating, power loss, or equipment failure.

Key Features:
True Four Terminal Measurement.
200 Amp Max DC Constant Current Source.
Fast and stable test results.
Portable and rugged design for field use
Suitable for circuit breakers, switchgear, busbars, and transformers
3.5 Digit LED display for Current and Resistance and mV drop.
Current Measurement (optional).
Fast Response time.
Stable and fast measurement.

Applications:
Circuit Breakers
Electrical Substations
Power Plants
Industrial Maintenance
Switchgear Testing
Transformer Maintenance
Electrical Utilities
Current transformer manufacture
Isolators , shunts and busbars.

Our Contact Resistance Meter is an ideal solution for electrical engineers, testing professionals, and maintenance teams seeking reliable and accurate resistance measurements for critical power system equipment.

Precision and Reliability in High-Current Testing

The QCRM-200 is purpose-built for high-accuracy contact resistance measurement in switchgear and circuit breakers. With a measurement range of 0-1999 micro-ohms and selectable test current up to 200A DC, it guarantees precise results with 0.5% accuracy. The fast response time and digital LED readout ensure efficient and reliable testing tailored for industrial operations.

Rugged and Portable for Field Applications

Encased in an industrial-strength reinforced aluminum alloy housing, the CRM 200A offers durability and portability. Its compact size, moderate weight of approximately 15 kg, and ergonomic carry handle allow technicians to transport and use it in challenging environments. The user interface is clearly labeled in English for straightforward operation.

Comprehensive Protection and User Safety

Safety is integral to the QCRM-200, featuring overload and short-circuit protection, as well as fused input safeguarding the equipment during extended operation. The 4-wire Kelvin connection technology effectively eliminates errors from lead resistance, offering reliable readings even in the harshest test scenarios.

FAQ's of Contact Resistance Meter CRM 200A (Model QCRM-200):

Q: How do I operate the QCRM-200 Contact Resistance Meter?

A: To use the QCRM-200, connect the equipment to your test object using the heavy-duty 4-wire Kelvin terminals. Select the desired test current (up to 200A DC) via the user controls, then power up the device using a 230V AC supply. The digital display will provide the measured contact resistance value in micro-ohms.

Q: What types of applications is the CRM 200A suitable for?

A: This meter is ideal for measuring contact resistance in circuit breakers, switches, and other high-current electrical contacts. It's particularly valuable for maintenance and commissioning in substations or switchyards where precise, repeatable readings are critical.

Q: When should I use a contact resistance meter like the QCRM-200?

A: Use the QCRM-200 during routine testing, quality control, or troubleshooting of electrical contacts that carry substantial current. Regular use helps ensure equipment reliability and minimizes the risk of failures due to poor contact integrity.

Q: Where can I use the CRM 200A in terms of environment and location?

A: The QCRM-200 is designed for both field and workshop environments. It operates reliably in temperatures from 0C to 50C and can be safely stored from -10C to 60C, making it suitable for a wide range of industrial and outdoor applications.

Q: What is the benefit of the 4-wire Kelvin connection?

A: The 4-wire Kelvin method eliminates errors caused by lead and contact resistance in the test setup, ensuring highly accurate resistance measurements even at very low values. This makes tests more reliable, particularly in critical high-current applications.

Q: How does the meter ensure operator and equipment safety during use?

A: The meter includes fused input protection and is designed with short-circuit and overload safeguards. This ensures both the user and the instrument remain protected, even in demanding high-current tests.

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