| After-sales Service: | Lifetime Technical Support |
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| Warranty: | 1 Year for Electric Circuit Breaker Analyzer |
| Display Type: | Digital Only |
| Certification: | CE |
| Customized: | Customized |
| Production Name: | Circuit Breaker Analyzer Contact Resistance Tester |
| Samples: |
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| Customization: |
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| What's the difference beteween circuit breaker tester and relay protection tester |
A circuit breaker tester and a relay protection tester are two different types of electrical testing equipment used in power systems.
A circuit breaker tester is designed to test the performance and functionality of circuit breakers, which are devices used to protect electrical circuits from damage caused by overcurrent, short circuit, or other faults. Circuit breaker testers are used to test parameters such as the insulation resistance, contact resistance, and timing of circuit breakers.
On the other hand, a relay protection tester is used to test the performance and functionality of protective relays, which are devices used to protect power systems from faults and other abnormal conditions. Relay protection testers are used to simulate faults and abnormal conditions in a power system, and to test the response of protective relays to these events.
In summary, while both circuit breaker testers and relay protection testers are used in electrical testing, they are designed for different purposes. Circuit breaker testers are used to test circuit breakers, while relay protection testers are used to test protective relays.
circuit breaker tester relay protection tester
Circuit Breaker Analyzer Technique index
| 12 channels for time measurement |
3-channel supports both the time contact and resistance contact time 6-channel isolated contacts for cascaded unit measurement of pole |
| Time measurement | Range: 4000ms Error :< 0.1ms Resolution: 0.01ms Linear resistance sensor: |
| Travel measurement according to sensor |
Linear resistance sensor Measurement range: 0~250mm; resolution: 0.01mm; error:<0.5mm Measurement range: 0~25mm; resolution: 0.01mm; error:<0.05mm Angle resistance sensor: Measurement range: 0~360°; resolution: 0.01°; error:<0.5° |
| Pre-insertion Resistance Measurement |
Range: 50~5000ohm; error :<1%RDG+2D |
| Dynamic resistance measurement |
Test current: 25~100A Measurement error :< 1%RDG+2D |
| Contact resistance measurement |
Range:0--10mohm ; Error<0.5%RDG+0.05%FS Range: 0-2mohm; Error:<0.5%RDG+2D |
| Speed measurement | 250mm linear resistance scale: 0~20m/s; error:<0.5%RDG+2D 25mm linear resistance scale: 0~20m/s; error:<0.5%RDG+2D Angle sensor: 0~20m/s; error:<0.5%RDG+2D Acceleration sensor: 0~20m/s; error:<5%RDG+2D |
| Coil current measurement | Range: 0~20A; resolution: 0.001A; error:<0.01A |
| Vibration measurement | Range: 0~5000G; error:<3% |
| Internal DC power source | Voltage: 12~265V; current:0~20A |
| Data Save | Built-in 8G storage memory and 2 USB interface for data export and external keyboard or mouse connection |
| Power supply | AC220V±10%; 50Hz±10% |
| Working environment | Temperature: -10~50°C; Humidity:<80% |
Excerpt on Operation of Vacuum Circuit Breaker
The main aim of any circuit breaker is to quench arc during current zero crossing, by establishing high dielectric strength in between the contacts so that reestablishment of arc after current zero becomes impossible.
The dielectric strength of vacuum is eight times greater than that of air and four times greater than that of SF6 gas. This high dielectric strength makes it possible to quench a vacuum arc within very small contact gap. For short contact gap, low contact mass and no compression of the medium the drive energy required in vacuum circuit breaker is minimum.
When two face to face contact areas are just being separated to each other, they do not be separated instantly, the contact area on the contact face is being reduced and ultimately comes to a point and then they are finally de-touched. Although this happens in a fraction of microsecond, it is a fact.
At this instant of de-touching of contacts in a vacuum, the current through the contacts concentrated on that last contact point on the contact surface and makes a hot spot.
At current zero this vacuum arc is extinguished and the conducting metal vapor is re-condensed on the contact surface. At this point, the contacts are already separated hence there is no question of re-vaporization of the contact surface, for the next cycle of current. That means, the arc cannot be reestablished again. In this way vacuum circuit breaker prevents the reestablishment of arc by producing high dielectric strength in the contact gap after current zero.
There are two types of arc shapes. For interrupting current up to 10 kA, the arc remains diffused and the form of vapor discharge and cover the entire contact surface. Above 10 kA the diffused arc is constricted considerably by its own magnetic field and it contracts.
The phenomenon gives rise overheating of contact at its center. In order to prevent this, the design of the contacts should be such that the arc does not remain stationary but keeps traveling by its own magnetic field. Specially designed contact shape of vacuum circuit breaker makes the constricted stationary arc travel along the surface of the contacts, thereby causing minimum and uniform contact erosion.
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