Residual Current Monitoring
Residual Current Monitoring
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Advanced alerting of leakage current conditions to protect workers and equipment
Residual and Leakage Current is a critical condition impacting the data center. In order to avoid dangerous situations for the personnel and the equipment, it is key to monitor leakage current coming from the IT equipment.
Raritan PDUs are the perfect tool to achieve granular Residual Current Monitoring and capture eventual leakage current at an early stage before it presents a risk of electrocution and fire.
Raritan RCM modules inside intelligent PDUs are compliant with IEC 62020 and tested for optimal accuracy.
Here are the 3 levels of RCM options you can choose from to equip your Raritan PDUs:
RCM Type A: - Detects AC leakage and is rated down to 6mA (IEC62020) leakage current across all lines(1Ph or 3Ph PDUs): Build-to-order option: - “M5”.
RCM Type B Single Channel: - Single Channel detection of AC and DC leakage current (IEC62020 range: 15mA to 300mA) across all lines (1Ph or 3Ph PDUs): Build-to-order option: - “M11”.
RCM Type B Three Channel: - Three channel detection of AC and DC leak¬age current (IEC62020 range: 15mA to 300mA). Detection on each line (3Ph PDUs). Requires specific chassis with option: -”M18”
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Residual Current Monitoring
Features
Embedded Neutral Current Monitoring Sensor
On Every Unit Equipped with RCM Type B sensor. Allows for granular Neutral Current Monitoring, allowing to verify if the phases are well balanced (Neutral equal to 0 in optimal case)
Patented Self-Test Function
Raritan RCM embed an automatic self-test function to avoid the need for an electrician to test the RCM accuracy and detection
Customizable Alarms
RCM Alerts can be configured through Xerus Firmware and be sent to a dedicated maintenance contact for quick intervention through Email, SMS and SNMP trap
Configurable RCM Thresholds
Raritan RCM Thresholds can be configured manually for optimal efficiency of management and early detection of critical RCM conditions
Additional Features
Flush Mount Sensor
Raritan RCM is perfectly integrated into the PDU chassis and does not stick out in a “dog-house”, facilitating mounting and optimizing airflow
Raritan RCM Technical Specification
IEC 62020 Classifications
| Classification | IEC 62020 Clause |
|
Method of Operation | 4.1 | Dependent on line voltage. The RCM only functions if line voltage is present. |
Type of Installation | 4.2 | All Raritan products with flexible line cords and plugs are for mobile installation and corded connection |
Current Paths | 4.3 | All 1-phase Raritan PDUs contain two current paths RCM. |
Ability to adjust residual operating current | 4.4 | Adjustable residual operating current. |
Adjustable time delay | 4.5 | Non- adjustable time-delay |
Protection against external influence | 4.6 | Enclosed-type RCM |
Method of Mounting | 4.7 | Panel board type RCM |
Method of Connection | 4.8 | Not associated with mechanical mounting |
Connection of load conductors | 4.9 | Monitored line is directly connected |
Fault indicating means | 4.10 | Visual, with other output signal |
Ability to directly discriminate | 4.11 | Directionally non-discriminating. |
Rated Voltage | 5.2.1.1 | PDU nameplate rating (UL-60950-1) |
Rated Insulation Voltage | 5.2.1.2 | As specified in UL-60950-1 |
Rated Current | 5.2.2 | PDU nameplate rating (UL-60950-1) |
Rated residual operating current | 5.2.3 | 0.5A Type A. |
Rated residual non-operating current | 5.2.4 | .25A |
Rated frequency | 5.2.5 | 47-63Hz |
Residual currents with direct current components | 5.2.6 | Type A and Type B |
Raritan RCM Technical Specification
| Operating characteristics according to IEC62020 | Type A or Type B |
Rated frequency | 42 to 2000Hz |
Measuring Range | 0mA to 1.0A |
Measurement Accuracy | 0 to 15% |
Rated residual operating current | Type A: 6mA to 500mA (default 30mA) |
Rated residual non-operating current | 50% of residual operating current set point |
Response time | < 10s (typically 2s) |
Hysteresis | Alarm asserts at values >= operating current. |