The Hertz HZJB-340A is a high-precision three-phase protection relay tester designed for substation applications. It is capable of testing various traditional relays and relay protection devices as well as modern microcomputer protection devices. It is particularly convenient for testing transformer differential protection and auto-reclosing devices.
The HZJB-340A Microcomputer Relay Protection Tester is a new, compact microcomputer relay protection tester developed by extensively consulting user feedback and summarizing the advantages and disadvantages of similar domestic products. It fully utilizes advanced modern microelectronic technology and devices. This tester can operate independently or be connected to a laptop.
| Output Accuracy | ≤0.5A: ±2mA >0.5A: 0.2% |
|---|---|
| Phase Current Output (RMS) | 0~40A |
| Three-Phase Current Output (RMS) | 0~120A |
| Phase Current Long-Term Operating System (RMS) | 10A |
| Maximum Output Power per Phase | 420VA |
| Maximum Output Power for Three-Phase Parallel Current | 900VA |
| Maximum Allowable Working Time for Three-Phase Parallel Current | 10s |
| Frequency Range (Fundamental Wave) | 20~1000Hz |
| Harmonic Times | 1~20 times |
| Output Accuracy | 0.5 Class |
|---|---|
| Current Output | 0~±10A / phase 0~±30A / three phase |
| Maximum Output Capacity Voltage | 20V |
| Output Accuracy | 0.2 Class |
|---|---|
| Phase Voltage Output (RMS) | 0~120V |
| Line Voltage Output (RMS) | 0~240V |
| Phase Voltage / Line Voltage Output Power | 80VA / 100VA |
| Frequency Range (Fundamental Wave) | 20~1000Hz |
| Harmonic Times | 1~20 times |
| Output Accuracy | 0.5 Class |
|---|---|
| Phase Voltage Output Amplitude | 0~±160V |
| Line Voltage Output Amplitude | 0~±320V |
| Phase Voltage / Line Voltage Output Power | 70VA / 140VA |
| Switch Input | 10 circuit — Idle contact: 1~20mA, 24V |
|---|---|
| Switch Output | 8 pairs — DC: 220V/0.2A; AC: 220V/0.5A |
| Time Measurement | Measurement range: 0.1m~9999s Measurement accuracy: 0.1mS |
| Dimension | 400 × 300 × 180 mm³ |
|---|---|
| Unit Weight | 18kg |
| Power Supply | AC 220V ±10%, 50/60Hz |
| Environment Temperature | -10ºC ~ +50ºC |
We are an integrated trade and manufacturing company with our own factory.
Yes, we accept OEM/ODM/OBM and can customize the built-in software of the product according to the customer's special requirements.
In normal circumstances, products in stock can be received within 5 to 7 days via the fastest international express. Other situations may vary depending on the quantity of products ordered, whether there are special customization requirements, and the delivery time chosen.
We have professional internal and external packaging to ensure the safety and stability of the products during transportation. For fragile or other special parts, we will include an extra set to ensure that the customer can use the product immediately upon receipt.
For quality issues that are not caused by human error, we provide a one-year warranty from the time the product is delivered, and lifetime technical support. Other after-sales issues will be addressed by our professional technical staff within 24 hours. The product comes with a user manual and an operation video.
