WIRING

Low-voltage power supply 600 V AC or less

(Notes) *Connections of control power source AC 100-120V-Terminals 1-2

AC 200-24®V-Terminals 1-3 For other volt ., use CPT.

`"Connections of output contacts NC-contact (opened when the 2E Relay operated)-Terminals 8-9 NO-contact (closed when the 2E Relay operated)-Terminals 9-10

-Connections of Remote reset switch

LOW-VOLTAGE

High-voltage power supply

PT or control transformer

2.4KV-13.8KV AC

(100-120V Secondary)

High-voltage CT secondary circuit wires pass through the windows of the built-in CT's.

HIGH-VOLTAGE

HOW TO SET

Selection of the suitable model may require some preli- minary calculations. See "Current Setting" to determine if the calculated "Current Setting %" can be obtained with the selected model given the motor full load current (FLA). Model Selection can also be influenced by wire size which limits the number of turns that can be passed through the CT windows .

(1)Current Setting

Nk I ) ® (2E AT Rating) x (External CT Ratio)

FLA

N(T)=Number of wire turns through 2E built-in CTs, round off to nearest integer.

(Current Setting %)= FLAx N x 100

(2E AT Rating) x (External CT Ratio)

Notes: "Select the external CT ratio so that the current setting % is as close to 100% as possible . If no external CT are used, substitute with "1 .0".

"For 1 .15 Service Factor Motors . If the motor has a 1 .0 S.F. multiply the calculated "Current Setting %" by 0.93. (Practice in USA)

Example: 200HP, 460V, 240A Full Load, 1 .15 S.F. Across-the-line start.

240 Amps exceeds the highest rated 2E Relay, therefore, external CT's must be used, and the HP1Y, 7 AT rated 2E, will be chosen as the standard model when the current exceeds the HP3Y's rating. If 300/5 CT's are used,

the Current Setting % = 240 x N(T) x 100% 7 x (300)

5

N(T) x 57.14®/0 .

And if 2 turns through the 2E Relay's CT windows (from the external CT's) are used, the % Dial

Setting = 2 x 57.14 =114% =110% or 115%

(2)Time setting

Determine the protection curve from 2E Relay operating curves, and read the operating time at 600% of setting current . Adjust the time setting dip switch to the nearest setting above the operating time.

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Toshiba RC820 Fla, Current Setting %= FLAx N x, NT x 57.14/0, Setting = 2 x 57.14 =114% =110% or 115% Time setting
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RC820 specifications

The Toshiba RC820 is a cutting-edge projector that has garnered attention for its impressive array of features and performance capabilities. Designed primarily for professional environments, the RC820 combines advanced projection technology with user-friendly functionalities, making it a great choice for businesses and educational institutions alike.

At the heart of the Toshiba RC820 is its high-resolution imaging technology, which boasts Full HD 1080p capabilities. This allows for sharp and vibrant visuals that are essential for presentations, video screenings, and educational purposes. The projector employs DLP (Digital Light Processing) technology, ensuring high levels of brightness and color accuracy, which contribute to an engaging viewing experience. With a brightness level of around 5,000 lumens, the RC820 can perform effectively in both darkened rooms and well-lit environments, providing versatility for various settings.

Another standout feature of the Toshiba RC820 is its laser light source. Unlike traditional lamp-based projectors, laser technology offers a longer lifespan and requires less maintenance. This means that users can enjoy consistent performance without the hassle of frequent bulb replacements. The laser light source also facilitates a quicker start-up time, allowing presentations to begin without delay.

The RC820 is equipped with a range of connectivity options, including HDMI, VGA, USB, and wireless connectivity capabilities. This allows users to connect a variety of devices seamlessly, whether it's a laptop, tablet, or smartphone. The projector also supports multiple display modes and has built-in image adjustment features, such as keystone correction and zoom functionality, enabling users to project images in various formats without sacrificing quality.

The design of the Toshiba RC820 is sleek and portable, making it suitable for both permanent installations and mobile presentations. It is relatively lightweight, which facilitates easy transport between different locations. Additionally, the projector is designed with a focus on energy efficiency, helping to reduce operational costs for organizations.

In summary, the Toshiba RC820 is a powerful and versatile projector that meets the demands of modern professional environments. Its high resolution, brightness, and advanced laser technology provide exceptional image quality, while its range of connectivity options and portability make it a practical choice for users across different sectors. Whether for business meetings, educational lectures, or entertainment, the RC820 stands out as a reliable tool for effective visual communication.
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