QBZ-ⅠA Microcomputer Protection Device
QBZ-ⅠA Microcomputer Protection Device
The QBZ series microcomputer protection devices are products independently developed and produced by our company, mainly divided into the QBZ-IA general-purpose time overcurrent ground fault protection device, and another model is the QBZ-IIB type full-range digital protection device powered by CT.
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Product Center
Distribution Automation Series
Microcomputer Protection Device
Product accessories:
- Description
- Product Parameters
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- Commodity name: QBZ-ⅠA Microcomputer Protection Device
- Commodity ID: QBZ-ⅠA
The QBZ series microcomputer protection devices are products independently developed and produced by our company, mainly divided into the QBZ-IA general-purpose time overcurrent ground fault protection device, and another model is the QBZ-IIB type full-range digital protection device powered by CT.
1Introduction
- QBZ-IAThe digital microcomputer protection device is a general-purpose time overcurrent and ground fault protection device, specifically designed for networks with ungrounded/compensated/resistor grounded neutral points.
- QBZ-IAThe protection functions that the device can achieve are summarized as follows.
- Time-limited overcurrent relay
- Characteristic selectable inverse time overcurrent relay
- Dual-element (low value and high value) ground fault protection with time-limited or inverse time characteristics
2Features and Performance
- Two parameter groups
- Selectable protection functions
Time-limited overcurrent relay and inverse time overcurrent relay
- Selectable inverse time characteristics in accordance with IEC 255-4
General inverse time (Type A)
Very inverse time (Type B)
Extremely inverse time (Type C)
- Selectable reset setting for inverse time characteristics
- High value overcurrent unit with instantaneous or time-limited function
- Dual-element (low value and high value) overcurrent relay for phase and ground faults
- Circuit breaker failure protection
Store up to 8 fault events with time stamps
- Extremely wide setting range and detailed measurement values and time setting steps
- Setting of password-controlled setting values
- User-defined password
- Wide voltage range AC and DC auxiliary power supply
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