{"id":4090,"date":"2026-10-13T08:29:21","date_gmt":"2026-10-13T08:29:21","guid":{"rendered":"https:\/\/acrel.pl\/?post_type=product&p=4090"},"modified":"2026-10-13T08:29:28","modified_gmt":"2026-10-13T08:29:28","slug":"alp500-low-voltage-protection-and-control-relay","status":"publish","type":"product","link":"https:\/\/acrel.pl\/pl\/product\/alp500-low-voltage-protection-and-control-relay\/","title":{"rendered":"ALP500 Low Voltage Protection and Control Relay"},"content":{"rendered":"\n

General<\/strong><\/h2>\n\n\n\n

Acrel 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.<\/p>\n\n\n\n

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.<\/p>\n\n\n\n


The product adopts embedded installation and consists of a main body, a transformer and optional functional modules.<\/p>\n\n\n\n

Function<\/strong><\/h2>\n\n\n\n

1) Dynamically adjusts protection strategy based on cable heating characteristics to prevent overload burnout;<\/p>\n\n\n\n

2) Zero-sequence\/leakage current protection;<\/p>\n\n\n\n

3) Accurately detects grounding faults to prevent electric shock and fire;<\/p>\n\n\n\n

4) Temperature-linked protection;<\/p>\n\n\n\n

5) Equipped with wired\/wireless temperature measurement modules, it monitors busbar and node temperatures in real time, providing automatic over-temperature warnings;<\/p>\n\n\n\n

6) Voltage\/current imbalance protection;<\/p>\n\n\n\n

7) Promptly detects three-phase imbalances to reduce equipment losses.<\/p>\n\n\n\n

Additional Function<\/strong><\/h2>\n\n\n\n
Additional Functions<\/td>Code Name<\/td>Additional Functions<\/td>Code Name<\/td><\/tr>
2-63rd harmonic voltage and current<\/td>H<\/td>Waveform record<\/td>WR<\/td><\/tr>
Communication Module(Choose one)<\/td>1*Profibus DPV0 Communication<\/td>CP<\/td>Leakage protection<\/td>L<\/td><\/tr>
2*Profibus DPV0 Communication<\/td>2CP<\/td>Metering module<\/td>S<\/td><\/tr>
Ethernet Communication (Modbus-TCP protocol)<\/td>MCE<\/td>1*4-20mA Analog output<\/td>M1<\/td><\/tr>
4G<\/td>4G<\/td>2*4-20mA Analog output<\/td>M2<\/td><\/tr>
Lora<\/td>LORA<\/td>Switch module<\/td>MD<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Technical Parameter<\/strong><\/h2>\n\n\n\n
Technical Parameters<\/td>Technical Indicators<\/td><\/tr>
Auxiliary Power<\/td>Support AC 85-265V\/DC 100-300V, Wide range power input<\/td><\/tr>
Rated Voltage<\/td>AC 380V \/ 660V\uff0c50Hz \/ 60Hz<\/td><\/tr>
Rated Current<\/td>1 (0.5A-6300A)<\/td>XXX\/1A Transformer with external CT<\/td><\/tr>
5 (0.5A-6300A)<\/td>XXX\/5A Transformer with external CT<\/td><\/tr>
25 (6A-25A)<\/td>external current transformer<\/td><\/tr>
100 (25A-100A)<\/td><\/tr>
Accuracy<\/td>ProtectionAccuracy<\/td>3-phase Current<\/td>1.0 Class<\/td><\/tr>
3-phase Voltage<\/td>0.5 Class<\/td><\/tr>
Power, Electrical Energy<\/td>2.5 Class<\/td><\/tr>
MeasuringAccuracy<\/td>3-phase Current\u3001Voltage<\/td>0.5 Class<\/td><\/tr>
Active Power, Electrical Energy<\/td>0.5 Class<\/td><\/tr>
Reactive Power, Electrical Energy<\/td>1.0 Class<\/td><\/tr>
Relay OutputContact Capacity<\/td>Standard configuration 4 channels<\/td>Resistive load\u3001AC250V\/10A<\/td><\/tr>
Optional 3 channels<\/td><\/tr>
Digital Input<\/td>Standard configuration 4 channels passive dry junction<\/td>Optional active DC110V\u3001DC220V\u3001AC220V input<\/td><\/tr>
Optional10 channels passive dry junction<\/td><\/tr>
Communication<\/td>Standard configuration<\/td>2*MODBUS RTU Communication<\/td><\/tr>
Optional (Choose one)<\/td>1*MODBUS-TCP<\/td><\/tr>
1*PROFIBUS-DPV0<\/td><\/tr>
2*PROFIBUS-DPV0<\/td><\/tr>
1*4G Communication<\/td><\/tr>
1*Lora Communication<\/td><\/tr>
Application Environment<\/td>Working Temperature<\/td>-10\u00baC\uff5e55\u00baC<\/td><\/tr>
Storage temperature<\/td>-25\u00baC\uff5e70\u00baC<\/td><\/tr>
Relative humidity<\/td>\u226495%, No condensation, No corrosive gas<\/td><\/tr>
Altitude<\/td>\u22642000m<\/td><\/tr>
Pollution Level<\/td>3 Class<\/td><\/tr>
Protection Grade<\/td>Main Body IP54, Additional function modules IP20<\/td><\/tr>
Installation Type<\/td>III Class<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Dimension<\/strong><\/h2>\n\n\n\n
\"\"
Dimension of current transformer<\/strong><\/figcaption><\/figure>\n\n\n\n
\"\"
Dimension of main body & additional functional module<\/strong><\/figcaption><\/figure>\n\n\n\n

Typical Connection<\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Application<\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"\u25cf Integrate leakage, overload and earth fault protection\n\u25cf Comprehensive protection functions\n\u25cf High accuracy energy metering\n\u25cf Support Modbus-RTU\u3001Modbus-TCP\u3001Profibus-DP Communication\n\u25cf 2nd~63rd harmonic measurement\n\u25cf Wired Temperature measurement - PT100\u3001PT1000\u3001NTC; Wireless Temperature measurement - ATE100\u3001ATE200\u3001ATE400\n\u25cf Suitable for AC 690V and below low-voltage switchgear, distribution panels and feeder circuits.","protected":false},"featured_media":4092,"template":"","productcat":[6,44],"class_list":["post-4090","product","type-product","status-publish","has-post-thumbnail","hentry","productcat-power-protection","productcat-motor-protection"],"yoast_head":"\nALP500 Low Voltage Protection and Control Relay - ACREL<\/title>\n<meta name=\"description\" content=\"Acrel 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.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/acrel.pl\/pl\/ru\/product\/alp500-low-voltage-protection-and-control-relay\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ALP500 Low Voltage Protection and Control Relay - 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