Table of Contents

Excitation System Tester Overview

The Excitation System Tester is a professional, portable precision testing instrument specially developed for the commissioning, routine maintenance, fault diagnosis and performance verification of generator excitation systems in power plants and power grid systems. It is applicable to various static and rotating excitation devices of synchronous generators, covering conventional thermal power, hydropower and new energy power generation units.

Integrating signal simulation, data acquisition, real-time analysis and waveform recording functions, the tester can independently complete full-range performance tests without relying on external auxiliary equipment. It is capable of detecting key parameters including synchronous signal phase and sequence, thyristor trigger pulse state, control angle range, closed-loop regulation characteristics, limiting protection logic and de-excitation circuit performance. By simulating actual operating conditions and fault working conditions of generators, it accurately verifies the control accuracy, response speed, stability and safety protection performance of the excitation system.

Excitation System Tester Product Description

The Excitation System Tester is a professional and high-precision test instrument specially developed for generator excitation system commissioning, routine maintenance and fault analysis. It integrates signal simulation, data acquisition and automatic analysis functions to comprehensively test key performances including excitation regulation response, voltage tracking accuracy, over-excitation and under-excitation limitation, de-excitation characteristics and PSS parameter characteristics. Adopting high-speed sampling and industrial-grade algorithm, it ensures stable output and accurate test results. Lightweight and portable in design, it is widely applicable for thermal power, hydropower and new energy power plants, providing reliable technical support for safe and stable operation of generator sets.

Technical Specifications of Excitation System Tester

Item	Technical Parameters
Product Name	Excitation System Tester
Application	Testing and commissioning of generator excitation systems, AVR (Automatic Voltage Regulator), excitation controllers and synchronous generators
Tested Equipment	Generator excitation system, AVR, excitation regulator, excitation control cabinet, power plant generator control system
Test Mode	Open-loop test, closed-loop test, excitation characteristic test, dynamic response test
Output Current	Low current output for excitation control circuit testing
Current Output Range	0–10 A (customizable according to requirements)
Output Voltage	0–250 V AC/DC (optional configuration)
Output Power	Adjustable output power for excitation system simulation testing
Frequency Output	45 Hz–65 Hz adjustable
Measurement Channels	Multi-channel analog signal measurement
Voltage Measurement Range	0–1000 V AC/DC
Current Measurement Range	0–20 A AC/DC
Measurement Accuracy	≤0.5%
Signal Input	Analog voltage/current input, feedback signal input
Control Signal Output	DC voltage/current simulation output for AVR control testing
Test Functions	AVR static characteristic test, excitation regulation test, limiter test, voltage response test
Open Loop Test	Supports low current open-loop excitation system testing
Simulation Function	Simulates generator voltage, current, frequency and excitation feedback signals
Data Acquisition	Real-time waveform acquisition and recording
Communication Interface	USB, Ethernet (optional RS485)
Test Software	PC-based test software with automatic test report generation
Display	Industrial touchscreen display
Operation Mode	Local operation and computer-controlled operation
Test Report	Automatic generation of test records and analysis reports
Protection Function	Over-current protection, over-voltage protection, short-circuit protection, overheating protection
Power Supply	AC 220 V ±10%, 50/60 Hz
Operating Temperature	-10℃ to +50℃
Relative Humidity	≤90% RH, non-condensing
Communication Protocol	Modbus TCP/RTU (optional)
Dimension	Customized according to configuration
Weight	Portable design for field commissioning

Excitation System Tester Packing List

No.	Item	Quantity	Description
1	Excitation System Tester Main Unit	1 set	Main testing unit with built-in control module, signal generation and measurement functions
2	Test Software Package	1 set	PC software for test configuration, data acquisition, analysis and report generation
3	Industrial Control Laptop (Optional)	1 pc	Pre-installed test software for remote control and data management
4	Power Supply Cable	1 pc	Standard AC power cable for equipment operation
5	Voltage Test Leads	1 set	High-quality test cables for voltage measurement and signal connection
6	Current Test Leads	1 set	Current output and measurement connection cables
7	Signal Simulation Cable	1 set	Cables for AVR, excitation controller and feedback signal simulation
8	Communication Cable	1 set	USB/Ethernet/RS485 communication cable for PC connection
9	Grounding Cable	1 pc	Protective grounding connection cable
10	Test Clamp / Terminal Accessories	1 set	Connection terminals and accessories for field testing
11	User Manual	1 copy	Operation manual and technical instructions in English
12	Calibration Certificate	1 copy	Factory calibration report and test certificate
13	Factory Test Report	1 copy	Equipment inspection and performance test report before shipment
14	Spare Fuse and Accessories	1 set	Standard spare parts for maintenance
15	Carrying Case / Wooden Case	1 set	Shock-resistant package for international transportation

FAQ: Excitation System Tester

Q1: What is an Excitation System Tester used for?

A1: It is a dedicated portable test instrument for generator excitation systems. It completes static debugging, performance verification, parameter calibration and fault diagnosis for automatic voltage regulators (AVR), thyristor rectifier bridges, triggering loops and auxiliary excitation circuits of synchronous generators. Widely applied in hydropower plants, thermal power stations and distributed power stations.

Q2: Which types of excitation systems can this tester adapt to?

A2: Compatible with all mainstream schemes: self-shunt excitation, separate excitation, brushless excitation, static excitation and AC exciter excitation systems. It works for small, medium and large turbo generators & hydro generators.

Q3: Does the device comply with international industry standards?

A3: Yes. It conforms to IEEE C57.12.90, ANSI excitation test specifications and GB/T 7409 series standards. All test data and reports are recognized for power plant acceptance and routine maintenance worldwide.

Q4: What output channels does the tester support?

A4: Equipped with 6-channel AC voltage output, 6-channel AC current output and multi-channel DC voltage/current output. Phase angle 0~360° adjustable continuously, frequency range 0~1000Hz, perfectly simulating generator terminal voltage and secondary CT/PT signals.

Q5: What is the measurement accuracy grade?

A5: AC voltage & current output/measurement accuracy: 0.2 class; DC signal accuracy: 0.2~0.5 class; phase measurement precision ≤0.1°. High precision guarantees accurate AVR static characteristic testing.

Q6: Can it measure generator rotor winding DC resistance?

A6: Yes. It adopts four-wire measurement mode to eliminate lead resistance error, measuring range 0~300Ω, suitable for excitation winding resistance check before unit startup and after overhaul.

Q7: What standard excitation tests can be carried out?

A7: Main test items include:

Open-loop small current test of excitation regulator
Thyristor trigger angle & rectifier characteristic test
AVR static voltage regulation characteristic test
CT/PT ratio & polarity verification
Synchronization loop phase and sequence detection
Excitation system fault simulation & troubleshooting

Q8: Can the tester simulate power grid faults to check excitation limiting functions?

A8: Supported. It can simulate under-excitation limit, over-excitation limit, overvoltage and undervoltage working conditions to verify all protective limiting logic built in the AVR device.

Q9: Does it record real-time waveforms and save test reports?

A9: Built-in large-capacity storage supports real-time waveform capture, curve display and data recording. Test results can be exported via USB flash drive; editable PDF test reports can be generated directly for project acceptance filing.

Q10: Is the tester suitable for outdoor field maintenance work?

A10: Yes. Portable integrated structure, weight ≤22kg. Working temperature range: -10℃ ~ +50℃, humidity 5%~95% RH non-condensing, protection grade IP54, dustproof and splash-proof for harsh power station on-site environments.

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