CTid-enabled AC Rope CT (ERA-XXX-YYYY)

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Model: ERA-XXX-YYYY

Information

This article is for the ERA-XXX-YYYY CTid enabled Rope CT. For the non-CTid enabled ropes (RCT-XXX-YYYY) please visit this article. In the upcoming future all Rope CTs will be CTid-enabled. Check the model number on the tag of the Rope CT to verify which version you have. CTid enabled Ropes start with ERA, and ones without CTid start with RCT.
Rope CTs are designed for 20-30 amps or greater load. Lower amperage results in lower accuracy readings.

Overview

Rope CTs (Rogowski Coils) are flexible sensors for monitoring current, similar to split-core CTs. They open via a connector for easy installation around conductors. The ERA Rope CT, with CTid for auto-detection, includes an LED to identify connections, useful when tracing leads is difficult. It is functionally identical to the RCT-XXX-YYYY model but features a different connector.

CTid-enabled models come in sizes of 106 mm (2775 A max), 178 mm (2775 A or 6935 A max), and 271 mm (6935 A max). Visit the online store or data sheet for pricing and model options.

Specifications

CTid Enabled
Max Amperage: 2775 A or 6935 A
Window sizes: 106 mm (4.17in.), 178mm (7.00 in.), or 271 mm (10.67 in.)
Frequency Range: 50 Hz or 60 Hz
Operating Temperature: -20 °C to 70 °C
Overvoltage Category: 1000V CAT III, 600V CAT IV
Positional: Error Better than 4%
Linearity: Better than 1%
Material: Orange thermoplastic rubber; flame retardant UL 94 V-0 rated
Cable: 1000V UL style 20940; External diameter 5mm; Wires 2x 26AWG
5-year Limited Warranty

Dimensions:

Included Hardware

1x Rope CT with built-in 8 foot leads and 2-pin plug affixed.

Documents

Installation & Assembly

Warning

To reduce risk of electric shock, open or disconnect circuits from the power distribution system (or service) of the building before installing or serving CTs.

Open the rope CT by gripping and twisting the bayonet connector and pulling the end of the rope CT out. Do not touch the inside surfaces where the CT opens. Any oils or debris in that area worsens accuracy.
Wrap the rope CT over the conductor of the circuit to be measured. Make sure the arrow on the rope CT points in the direction of the primary current flow (the current flow that should yield a positive power reading).
Close the rope CT by gently squeezing the latch and inserting the other end inside the latching end and release the latch.
Verify that the rope CT is fully closed.
Optional: secure the CT to the conductor with a cable tie.
Route the twisted pair wires of the CT to the meter such that they do not directly contact live terminals or bus bars.
Plug the 2-pin terminal at the end of the twisted pair wires into an unused port on the meter.
When connected to an EG4xxx meter, use the CTid® scanning feature to automatically detect the sensor type and its current rating. If using an older model meter, use the drop-down method to Configure the sensor input.