IR470LY-4021 Bender Insulation Monitoring Relay

Description

IR470LY-4021 Bender Insulation Monitoring Relay

Product Dimensions：

Product Description (Detailed Explanation)

The IR470LY-4021 belongs to the ISOMETER® family. In an ungrounded (IT) system, a single insulation fault does not cause a circuit breaker to trip, allowing the process to continue. However, the IR470LY-4021 is critical because it detects that first fault, providing an alarm before a second fault leads to a dangerous short circuit or equipment failure.

• Measurement Method: It utilizes an active measuring pulse to monitor the insulation resistance ($R_F$) between the system and the ground (PE).

• Adaptability: It is capable of monitoring systems with high leakage capacitances, which are common in industrial environments with long cable runs or EMI filters.

• Fault Location: It often works in conjunction with insulation fault location systems to pinpoint exactly which branch of a circuit has failed.

Product Parameters (Technical Specifications)

Product Advantages (Key Benefits)

• Continuous Monitoring: Unlike manual “megger” testing, this device provides 24/7 real-time monitoring while the system is energized.

• Early Warning System: By detecting insulation degradation at the $k\Omega$ level, maintenance can be scheduled during planned downtime rather than responding to an emergency trip.

• Increased Safety: Reduces the risk of electric shock and fire by ensuring that leakage currents are identified immediately.

• System Longevity: Protects sensitive electronics and motors from the stresses caused by undetected insulation faults.

• Versatility: Suitable for systems containing frequency converters or rectifiers, which often “confuse” simpler insulation monitors.

Precautions (Important Notes)

• Single IT System Only: One IR470LY-4021 must be used per galvanically connected system. Connecting two insulation monitors to the same electrical network will cause measurement interference.

• Grounding Connection: Ensure the connection to the PE (Protective Earth) is extremely secure. If the ground wire is broken, the device cannot detect faults.

• High Voltage Testing: If you perform a high-voltage dielectric test on the system, the IR470LY-4021 must be disconnected to prevent damage to its sensitive measuring circuitry.

• Active Measurement: Because it injects a small DC signal, ensure that any other connected components are compatible with the device’s measuring pulse.

Product Applications (Typical Use Cases)

The IR470LY-4021 is essential in industries where power continuity is a matter of safety or high cost:

• Medical Facilities: Monitoring power in operating theaters (Group 2 rooms) where a power trip could be life-threatening.

• Marine & Offshore: Used in ships and oil platforms where ungrounded systems are standard to ensure propulsion or drilling doesn’t stop unexpectedly.

• Industrial Manufacturing: Protecting automated assembly lines, paper mills, and chemical plants from unexpected shutdowns.

• Railway Systems: Monitoring signaling and control circuits to ensure safe rail operations.

• Renewable Energy: Monitoring the DC side of large solar arrays or wind turbine control systems.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

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