What is Wrindu 3 phase Relay Protection Tester?

The RDJB-802M 3 phase relay protection tester is a high-performance, compact microcomputer relay protection tester developed by Wrindu. Designed for professionals in the field of relay protection, it combines modern microelectronic technology with a small, portable design. This tester offers superior accuracy, flexibility, and ease of use, making it a valuable tool for testing and calibrating relay protection systems in various power applications.

Key Features of Wrindu 3 Phase Protection Relay Tester

Feature	Description
Flexible Voltage and Current Output	Offers four-phase voltage and three-phase current output, compatible with traditional tests and advanced differential testing.
Independent or External Operation	Can operate independently or be connected to a laptop/desktop for enhanced performance and stable results.
Hi-Fi Linear Power Amplifier	Uses modular linear power amplifiers for high fidelity and reliability, ensuring minimal interference and accurate waveforms.
High-Performance Mainframe	DSP control for real-time signal processing, wide bandwidth, high-resolution D/A conversion, and high-precision output.
Powerful Software Capabilities	Automated validation, fault playback, data storage, vector display, and online report printing for efficient testing.
Independent DC Power Output	Adjustable DC outputs (110V and 220V) for powering devices requiring DC input.
Comprehensive Communication Interface	USB communication ports for easy integration with external devices and remote control.
Self-Protection Features	Includes heat dissipation, power soft-start function, fault self-diagnosis, and output latch to ensure safe operation.

Specifications of Wrindu 3 Phase Protection Relay Tester

Specification	Details
AC Current Source	Phase current output: 0–40A, 0.2% precision Maximum output power: 450VA
DC Current Source	Current output: 0–±10A per phase, 0.5% precision Maximum load voltage: 20V
AC Voltage Source	Phase voltage: 0–120V, 0.2% precision Line voltage: 0–240V
DC Voltage Source	Phase voltage: 0–±160V, 0.5% precision Line voltage: 0–±320V
Switching Terminal	8 input channels 4 output channels DC: 220V/0.2A, AC: 220V/0.5A
Time Measurement Range	0.1ms – 9999s, 0.1ms accuracy
Power Supply	AC220V ± 10%, 50Hz

FAQs

What is a 3-phase relay protection tester?

A: It is a high-precision secondary injection test device that outputs three independent channels of current and voltage. It simulates electrical faults to verify if protective relays trigger correctly during events like short circuits or ground faults.

When should I choose 3 phases over 6 phases?

A: Choose a 3-phase tester for standard maintenance tasks like transmission line or industrial motor testing. It is cost-effective and lighter than a 6-phase unit, which is suited for advanced systems or specialized differential protection tests.

What specific tests can it perform?

A:

• Fundamental Tests: Overcurrent, overvoltage/undervoltage, and frequency (df/dt) relays.

• Fault Simulation: Single-phase to three-phase transient and permanent faults.

• Advanced Checks: Harmonic analysis, impedance protection, and synchronization tests.

What are the essential features to look for?

A:

• Precision: Measurement accuracy of at least ±0.2%.

• Integration: IoT and cloud connectivity for real-time data analysis and remote monitoring.

• Hardware: True-color LED display (e.g., 10.4-inch) and a dedicated DC auxiliary power supply (e.g., 110V/220V).

How often should relays be tested?

A: ANSI/NFPA 70B recommends testing every two years for industrial settings, while IEC standards suggest testing every three years at most.

What is the typical cost?

A: Entry-level units start at around $2,600, with advanced models ranging from $7,000 to $12,000, depending on automation and channel power.

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