Bender IR470LY-4021 Insulation Monitoring Device

Description

Bender IR470LY-4021 Insulation Monitoring Device

Product Dimensions：

The Bender IR470LY-4021 is a high-precision insulation monitoring device (A-ISOMETER®) designed for unearthed AC and three-phase systems (IT systems). It ensures electrical safety by continuously monitoring the insulation resistance between the system and earth.

Below is the detailed product information in English.

1. Product Description

The IR470LY-4021 is part of the ISOMETER® series, specifically engineered to monitor ungrounded AC systems. It operates by superimposing a DC measuring voltage onto the system; if the insulation resistance drops below a pre-configured value, the device triggers an alarm.

• Type: Insulation Monitoring Device (A-ISOMETER®)

• Series: 470

• Application: Pure AC systems without significant DC components or high leakage capacitance.

2. Technical Parameters (Specifications)

3. Key Product Advantages

• Reliable Early Detection: Detects insulation degradation before it leads to a total system failure or equipment damage.

• Versatility: While rated for 793 V AC, it can monitor high-voltage systems (up to 7.2 kV) when paired with external coupling devices (e.g., AGH series).

• Dual Response Ranges: Offers flexibility in setting sensitivity for different industrial environments.

• Connection Monitoring: Automatically monitors the connection to the system and earth; it signals an alarm if the measuring leads are disconnected.

• Compact Design: 70mm width allows for easy integration into standard control cabinets.

• Visual Diagnostics: Features a built-in LED bar graph to show the current insulation level and dedicated alarm/power LEDs.

4. Important Precautions (Notes)

• IT Systems Only: This device is exclusively for unearthed (IT) systems. It cannot be used in TN or TT (grounded) systems.

• No DC Components: The IR470LY series is designed for systems without large power electronics (like VFDs or rectifiers) that introduce DC components. For systems with DC components, the Bender IRDH series is recommended.

• Single Device Rule: Only one insulation monitoring device should be connected to a single galvanically connected IT system to avoid measurement interference.

• Coupler Use: For voltages exceeding 793 V, an AGH-series voltage coupler must be used to protect the device.

5. Product Applications

The IR470LY-4021 is widely used in sectors requiring high operational reliability where a first-fault should not shut down the power:

• Industrial Plants: Control circuits, motor control centers (MCCs), and production lines.

• Marine & Offshore: Shipboard power systems and oil rigs.

• Renewable Energy: Wind turbine auxiliary systems and power distribution.

• Infrastructure: Tunnel lighting, railway signal systems, and emergency power supplies.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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

Service: Professional Sales provides 24 hours /7 days online service

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