Choosing a suitable relay protection tester requires comprehensive consideration of various factors such as testing requirements, technical parameters, functional characteristics, usage scenarios, and brand services. Here is a specific selection guide:
1. Clearly define testing requirements
① Test object
Types of protective devices: line protection, transformer protection, busbar protection, etc.
Testing accuracy requirements: For example, the current/voltage output accuracy needs to meet level 0.2 or higher.
Functional requirements: Whether harmonic output, fault simulation, automatic testing, etc. are needed.
② Test scale
Number of channels: How many outputs (such as 6-phase voltage and 6-phase current) are required for single-phase/three-phase testing.
Power requirement: Do you need high power output (such as current parallel output up to 180A).
2. Comparison of core parameters
Parameter selection suggestions
Priority should be given to models with current/voltage accuracy of 0.2 level and time accuracy of 0.1ms for output accuracy.
If high-frequency protection needs to be tested within the frequency range, it is necessary to support 0-1000Hz frequency output.
When simulating harmonics for harmonic output, choose a model that supports 1-20 harmonics.
The power capacity is selected based on the power requirements of the tested equipment, such as current parallel output ≥ 120A and voltage output ≥ 130V.
3. Functional feature matching
① Degree of automation
For scenarios that require frequent testing (such as factory testing), priority should be given to models that support automatic testing sequences.
When complex protection testing is required (such as three-phase differential), choose a model with automatic verification function.
② Interface and Scalability
When operating online with a PC, a USB/RS232 interface is required.
When expanding functions (such as GPS timing), external expansion modules must be supported.
③ Human computer interaction
When on-site operation is required, choose models equipped with large-sized touch screens.
When remote control is required, select a model that supports wireless communication.
4. Adaptation to usage scenarios
① On site testing
When portability is required, choose models with small size and light weight (such as ≤ 20kg).
When using in harsh environments, choose models with high protection levels (such as IP54).
② Laboratory testing
When high-precision testing is required, choose models with high resolution (such as 0.1%).
When testing for a long time, choose a model with good heat dissipation performance.
5. Brand and Service
① Brand selection
Prioritize selecting well-known brands to ensure quality and after-sales service.
When customizing features, choose a vendor that provides technical support.
② After sales service
When long-term use is required, choose to provide a quick response service (such as 48 hours on-site).
When training is required, choose a manufacturer that provides operational training.
6. Cost effectiveness considerations
① Budget Scope
Low budget: Choose the basic functional type (such as requiring only current/voltage output).
High budget: Choose a fully functional model (if harmonic/automation testing is required).
② Long term costs
Need to consider the cost of consumables (such as test wires, terminals, etc.).
Need to consider maintenance costs (such as warranty period, repair costs).
7. Summary
① Requirement driven selection: Match parameters based on testing objects, scale, accuracy, and other requirements.
② Function priority: Automation/interface/scalability functions need to be evaluated with emphasis.
③ Scenario adaptation: Differentiated selection is required for on-site/laboratory/long-term use.
④ Brand guarantee: Prioritize well-known brands to ensure quality and after-sales service.
Through the above steps, suitable relay protection testers can be systematically selected to avoid blind decision-making.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com
