ALP500 Over Current & Earth Fault Relay
■ Wide auxiliary power input voltage, supporting AC85-265V/DC100-300V power supply.
■ Supports full electrical parameter measurement (U, I, P, Q, S, PF, F, EP, EQ), voltage and current imbalance functions, etc.
■ Protection functions include inverse time overcurrent, three-stage overcurrent, overpower, and zero-sequence overcurrent.
■ Standard configuration includes 4 programmable DI inputs; optional switch module adds an additional 10 programmable DI inputs.
■ 4 programmable DO outputs
■ Standard configuration includes 2 MODBUS_RTU communication channels, plus 1 MODBUS-TCP module.
■ Optional 1-2 DC 4-20mA analog output interfaces.
■ Features multiple event recording functions, including opening/closing records, DI position records, fault records, and fault waveform recording.
■ Equipped with a USB interface for data export via USB flash drive.
ALP500 low-voltage protection measurement and control device (hereinafter referred to as low-voltage protection device) is suitable for low-voltage power distribution circuit with rated voltage to AC660V , integrating power monitoring, feeder protection, opening and closing control, communication networking, node temperature measurement, operation and maintenance management and other functions. It has various protection functions such as inverse time overcurrent, three-stage overcurrent, overpower, zero sequence overcurrent, undervoltage, overvoltage, unbalance (voltage, current), neutral line overcurrent, and leakage current. Different communication modules can be selected to meet the needs of on-site communication.
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Technical Parameters |
Technical Indicators |
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Auxiliary power |
Support AC 85-265V/DC 100-300V Wide range power input |
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Rated Voltage |
AC 380V / 660V，50Hz / 60Hz |
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Rated Current |
1 (0.5A-6300A) |
XXX/1Transformer with external current transformer |
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5 (0.5A-6300A) |
XXX/5Transformer with external current transformer |
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25(6A-25A) |
external current transformer |
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100(25A-100A) |
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Accuracy |
Protection Accuracy |
3-phase Current |
1.0 Class |
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3-phase Voltage |
0.5 Class |
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Power，Electrical Energy |
2.5 Class |
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Measuring Accuracy |
3-phase Current、Voltage |
0.5 Class |
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Active Power， Electrical Energy |
0.5 Class |
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Reactive Power， Electrical Energy |
1.0 Class |
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Relay output contact capacity |
Standard configuration 4 channels |
resistive load、AC250V/10A |
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Optional 3 channels |
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Switch Quantity Input |
Standard configuration 4 channels passive dry junction |
Optional active DC110V、DC220V、AC220V input |
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Optional 10 channels passive dry junction |
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Communication |
Standard configuration |
2 way MODBUS RTU Communication |
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Optional（Choose one） |
1 way MODBUS-TCP |
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1 way PROFIBUS-DPV0 |
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2 way PROFIBUS-DPV0 |
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1 way 4G communication |
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1 way Lora communication |
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Application Environment |
Working Temperature |
-10ºC～55ºC |
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Storage temperature |
-25ºC～70ºC |
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Relative humidity |
≤95﹪No condensation, no corrosive gas |
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Altitude |
≤2000m |
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pollution level |
3 Class |
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Protection Grade |
Main Body IP54，Additional function modules IP20 |
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Installation Type |
III Class |
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