Power Supply and Wiring

Section 6 (continued)

To remove the line to ground MOV protection, locate the jumper shown below. The jumper is located between the input and output terminal blocks on the main board. Move to the position shown.

For Frame Size 1 Controllers:

For Frame Sizes 2 and 3 Controllers:

Resistance grounding and ground fault protection

Connecting the Wye secondary neutral to ground through a resistor is an acceptable method of grounding. Under a short circuit secondary condition, any of the output phases to ground will not exceed the normal line to line voltage. This is within the rating of the MOV input protection devices on the drive. The resistor is often used to detect ground current by monitoring the associated voltage drop. Since high frequency ground current can flow through this resistor, care should be taken to properly connect the drive motor leads using the recommended cables and methods. In some cases, multiple drives on one transformer can produce a cumulative ground current that can trigger the ground fault interrupt circuit.

Open Delta (consult factory)

This type of configuration is common on 230 volt systems. From time to time it may be encountered where only single phase power is available and three-phase power is required. The technique uses two single phase transformers to derive a third phase. When used to power a drive this configuration must be derated to about 70% of the single phase rating of one transformer. This system provides poor regulation and it is possible that only the two line connected phases will provide power. In this case the drive must be derated to 50 % of its rating. (Ex. A 20 HP 230 volt drive now becomes a 10 HP 230 volt drive.)

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ITT IM213 manual Resistance grounding and ground fault protection, Open Delta consult factory, For Frame Size 1 Controllers
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IM213 specifications

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The IM213 utilizes cutting-edge technologies to ensure accuracy and reliability. Its high-resolution analog-to-digital converters (ADCs) offer precise measurements with minimal noise interference, enhancing the overall performance of the device. Additionally, the device supports multiple communication protocols, including Modbus, RS-232, and RS-485, enabling seamless integration into existing systems.

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In summary, the ITT IM213 is a versatile and durable data acquisition device that serves a wide range of industrial applications. Its advanced logging capabilities, high accuracy, robust construction, and connectivity options position it as a leading choice for professionals looking to improve their monitoring and data collection efforts. With these features, the IM213 is poised to play a vital role in enhancing productivity and operational efficiency in various sectors.
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