Description
Function Configuration
1. Protection Functions
a) Three-stage overcurrent protection (instantaneous current trip, time-delayed current trip, definite-time overcurrent protection). Each stage can be enabled or disabled independently; trip or alarm output is selectable.
b) Reclosing function: three-phase three-shot automatic reclosing.
c) Post-reclosing acceleration function: three-stage overcurrent accelerated protection, two-stage zero-sequence overcurrent accelerated protection.
d) Overload protection: trip or alarm output is selectable.
e) Two-stage zero-sequence overcurrent protection: trip or alarm output is selectable.
f) Inverse-time overcurrent protection.
g) Zero-sequence overvoltage protection: trip or alarm output is selectable.
h) Undervoltage protection: trip or alarm output is selectable.
i) Overvoltage protection: trip or alarm output is selectable.
j) Non-electrical quantity protection: trip or alarm output is selectable.
2. Device Self-diagnosis Function
a) Automatic fault detection for RAM, FLASH, A/D converter, etc.
b) Automatic checking of setting values and other parameters.
c) Power failure alarm function.
3. Event Recording Function
a) Records events including protection operations, alarm events, and device self-diagnosis faults.
b) Records the type and time of protection operations; records the type and occurrence time of self-diagnosis faults.
4. Communication Function
a) Uploads real-time data including measured values, fault alarm signals and protection settings.
b) Receives control commands from the superior control system.
5. Monitoring Function
a) Displays protection current, voltage, active power, reactive power, etc.
b) Collects digital signals such as circuit breakers, isolating switches and non-electrical quantities.
c) Remote control of circuit breaker opening and closing from the backstage monitoring system.
Technical Parameters
1. Rated DC Data
a) DC 220V, DC 110V, DC 48V.
b) DC voltage ripple factor ≤ 2%; voltage fluctuation range: 80%~115% of rated voltage.
2. Rated AC Data
a) Rated AC current In: 5A, 1A.
b) Rated AC voltage Un: 100V.
c) AC waveform: sine wave, distortion factor ≤ 2%.
d) Frequency fn: 50Hz (60Hz optional, to be specified when ordering); allowable deviation ±0.5%.
3. Overload Capacity
- AC current circuit:
- 2×In: continuous operation
- 10×In: permissible for 10s
- 40×In: permissible for 1s
- AC voltage circuit:
- 1.2×Un: continuous operation
- 1.4×Un: permissible for 10s
4. Power Consumption
a) AC current circuit: ≤ 1VA per phase at In=5A; ≤ 0.5VA per phase at In=1A.
b) Operating power supply circuit: ≤ 8W.
5. Output Contacts
a) In DC circuits (voltage ≤ 250V, current ≤ 0.5A, time constant 5±0.75ms): breaking capacity 50W, allowable continuous current ≤ 5A.
b) In AC circuits (voltage ≤ 250V): breaking capacity 50VA, allowable continuous current ≤ 5A.
6. Insulation Performance
a) Insulation resistance: ≥ 500MΩ between all circuits and the enclosure under standard test conditions.
b) Dielectric strength: withstands AC 50Hz, 2kV (RMS) for 1 minute without breakdown or flashover. For re-test, use 75% of the rated voltage.
7. Impulse Voltage
8. Anti-interference Capability
9. Mechanical Performance
a) Operating conditions: withstands vibration response and shock response tests at severity level I.
b) Transportation conditions: withstands vibration endurance, shock and bump tests at severity level I.
10. Environmental Conditions
10.1 Normal Operating Conditions
Ambient temperature: -10℃ ~ +65℃
Relative humidity: ≤ 95%, no condensation
Installation Dimensions
Vertical Screen
- Outline dimensions (W×H×D): 87×162×130 mm (including terminals)
- Cutout dimensions (W×H): 77×152 mm
Horizontal Screen
- Outline dimensions (W×H×D): 162×87×130 mm (including terminals)
- Cutout dimensions (W×H): 152×77 mm
Application Scope
The microcomputer integrated protection relay is suitable for the protection of feeders, motors, transformers and capacitors at 10kV and below. It integrates protection, measurement and control functions.
It can be installed locally in switchgear or assembled in a centralized panel. Equipped with an RS485 communication interface, it can form an integrated automation system with other protection and automation devices via communication links.
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