ETI MAC-21 Repair

ETI MAC-21 Circuit Breaker Tester Repair

ETI Precision Repair

$245.00

🛡️ 90-Day Warranty ✓ Fee Credited to Repair ⚡ No Forms Needed

Expert ETI MAC-21 repair and calibration with documented test results. We address coil current measurement drift and other common circuit breaker tester faults.

Helpful Resources

đź“‹ How It Works

  1. Submit Request – Pay evaluation fee & provide equipment details
  2. Ship to Us – Send your equipment to our Oregon facility
  3. We Evaluate – Detailed diagnosis & repair estimate
  4. Fee Credited – Your evaluation fee applies to repair cost
  5. We Repair – Professional repair with 90-day warranty
  • 🔧 Fast Turnaround: Most repairs are completed within 1–3 business days.
  • đź“Ź Precision Calibration: NIST-traceable calibrations included for most repairs.
  • 🛡️ Warranty: 90-day warranty on all repairs.
  • đź“ť Transparency: Detailed evaluation and repair estimate before work begins.
âś“ Evaluation Fee Credited Toward Repair

This evaluation fee is applied as credit toward your final repair cost. After we evaluate your equipment, you'll receive a detailed estimate before any repair work begins.

Category: Tags: , , , , , , , , , , , , , , , , , ,

Description

ETI MAC-21 Circuit Breaker Tester Repair

The ETI MAC-21 Circuit Breaker Tester is a protective relay test set – it generates precisely controlled voltages and currents, and times how a protection relay responds. High-current amplifiers driven hard into inductive loads are the heart of it, and the part that wears.

Certified technicians at June Company service the ETI MAC-21 Circuit Breaker Tester for utility relay technicians, substation commissioning crews, and industrial protection teams. Every instrument is repaired at component level and verified against reference standards before it ships back, with the measured results documented.

Common ETI MAC-21 Circuit Breaker Tester problems we fix

  • Binary input or output faults.
  • IEC 61850 or GOOSE communication failures.
  • Convertible channels not combining.
  • Cooling fan or thermal shutdown.
  • Internal power supply faults.
  • Display, keypad or front-panel faults.
  • One current or voltage channel weak or dead – amplifier output-stage failure in a single channel while the others still work, which is the classic giveaway.
  • Phase angle accuracy drifted.
  • Trip timing measurement errors.

FAQs

One channel is weak and the rest are fine. Repairable? Yes, and it is the most common fault on these. Amplifier output stages fail individually and are repaired at component level.

Are the timing and phase measurements verified? Yes, against reference standards, because those are the specifications a relay test set exists to deliver.

Every repair carries a 90-day parts-and-labor warranty, with a firm quote before any work begins. Email us or submit a service request.

Brand

ETI Repair

ETI Precision, also known as Electrical Test Instruments (ETI), provides a range of calibration and testing equipment primarily for electrical safety and performance verification. Here's an overview of some key ETI Precision products and what they do:

1. Multi-Product Calibrators

  • Description: Instruments designed to calibrate various types of electrical test equipment such as multimeters, oscilloscopes, and power meters.
  • Applications: Used in laboratories, manufacturing, and service centers to ensure the accuracy of measurement devices.
  • Popular Models: Cal Test 5000
  • Features: High accuracy, multifunctional capabilities, and user-friendly interfaces.

2. Electrical Safety Analyzers

  • Description: Devices for testing the safety and compliance of electrical equipment by measuring insulation resistance, ground continuity, and leakage current.
  • Applications: Essential for testing medical devices, consumer electronics, and industrial machinery to meet safety standards.
  • Popular Models: ESA615 Electrical Safety Analyzer
  • Features: Comprehensive safety testing, automated test sequences, and detailed reporting.

3. Portable Appliance Testers (PAT)

  • Description: Instruments used to test the electrical safety of portable appliances, ensuring they are safe to use.
  • Applications: Commonly used in workplaces, rental properties, and service industries to test tools, appliances, and office equipment.
  • Popular Models: PrimeTest Series
  • Features: Lightweight, easy to use, and capable of conducting a range of safety tests.

4. High Voltage Insulation Testers

  • Description: Equipment for measuring the insulation resistance of high voltage equipment and systems.
  • Applications: Used in power utilities, industrial plants, and maintenance services to detect insulation breakdowns and prevent failures.
  • Popular Models: HV Insulation Tester 5400
  • Features: High test voltages, accurate measurements, and robust design for field use.

5. Ground Resistance Testers

  • Description: Devices for measuring the resistance of grounding systems to ensure they provide a safe path for fault currents.
  • Applications: Vital for the maintenance of electrical grounding systems in buildings, substations, and industrial facilities.
  • Popular Models: Ground Resistance Tester 6100
  • Features: Reliable measurements, easy-to-read displays, and durable construction.

6. Transformer Test Equipment

  • Description: Instruments designed to test the performance and condition of electrical transformers.
  • Applications: Used by utilities and service companies to assess transformer efficiency and detect potential issues.
  • Popular Models: Transformer Ohmmeter 2800
  • Features: Accurate resistance measurement, easy operation, and comprehensive testing capabilities.

7. Current Clamp Meters

  • Description: Devices that measure current flow in electrical conductors without needing to make direct contact or disconnect the circuit.
  • Applications: Useful for electricians, maintenance personnel, and energy auditors for non-invasive current measurements.
  • Popular Models: Current Clamp Meter 3000
  • Features: High sensitivity, wide measurement range, and portable design.
ETI Precision Repair

Related products