Q96-MΩB Q72-MΩB Q96-ZMΩB Q72-ZMΩB Isolation monitor for 24V DC grid

Q96-MΩB Q72-MΩB Q96-ZMΩB Q72-ZMΩB Isolation monitor for 24V DC grid

Working priciple of Q96-MΩB Q72-MΩB Q96-ZMΩB Q72-ZMΩB Isolation monitor for 24V DC grid

1. Additional DC signal test method. This method is used in pure AC system or low-voltage (generally less than dc220v) pure DC system. It is not applicable in AC / DC hybrid power grid (typically including frequency converter power grid). At the same time, this scheme is generally only suitable for small power grid with small distributed capacitance, and is not applicable to power grid with long lines (such as mine, oil production platform, etc.)

2. The additional pulse square wave model test method has the most stable application and the strongest universality. At present, this scheme is adopted by advanced technologies in Europe and America. The domestic typical application is the yny series insulation monitor of Dongguan Qianbo Electronic Technology Co., Ltd., which also adopts this principle. This scheme can be applied to pure AC, pure DC and AC / DC hybrid power grids, It can be applied to the power grid with frequency converter to monitor the whole phase of AC, DC and AC in the frequency conversion power grid, and the applicable voltage is AC / dc0-11.5kv

3. Test principle of unbalanced bridge method. This method is only applicable to DC system. This principle scheme is the most economical. However, due to its principle factors, this scheme is not stable and reliable, prone to false alarm, and can not accurately monitor the insulation resistance value when the insulation performance of DC bus decreases at the same time. Therefore, it can only be applied in occasions with low requirements.

Features of Q96-MΩB Q72-MΩB Q96-ZMΩB Q72-ZMΩB Isolation monitor for 24V DC grid

It has the characteristics of wide measurement range, high accuracy, strong environmental adaptability and good electromagnetic compatibility.

Main tech data of Q96-MΩB Q72-MΩB Q96-ZMΩB Q72-ZMΩB Isolation monitor for 24V DC grid

Effective measurement range: 0.005 ~ 0.2 ~ 5m Ω

Instrument deflection angle: 240 °

Instrument indication accuracy: level 1.5

Instrument alarm accuracy:

100KΩ±10KΩ

60KΩ±6KΩ

30KΩ±6K Ω

10KΩ±2KΩ

Normal operating conditions:

Operating ambient temperature: - 25 ~ + 55 ℃

Working vibration frequency: 2 ~ 100Hz,

Acceleration ≤ 0.7G

Working position: make the ruler in the vertical position

Working voltage: 100vac, 220VAC

Operating frequency: 50Hz