4.3.3Power connections from the isolation switch to the main power fuses shall be made using bus bar. Connections from the contactor through the current transformers to the outgoing load terminals shall be made using power cable furnished by others.

4.3.4The contactor shall be available with an optional mechanical latch with provisions for manual or electrical trip.

4.3.5The contactor shall be mechanically and electrically interlocked with the isolation switch as described in the section on interlocking (4.5).

4.4Power Fuses

4.4.1The power fuses shall be arranged horizontally at the top of the contactor unit. In this position, the blown fuse indicators on the fuses shall be visible, through the viewing window, when the medium voltage door is closed.

4.4.2The fuse unit shall include either single or double barrel power fuses, R-rated or E-rated, 3" diameter.

4.5Interlocking

4.5.1A mechanical interlock shall be provided between the vacuum contactor and the isolation switch. The interlock shall prevent the isolation switch from being opened or closed unless the main contacts of the contactor are opened.

4.5.2The interlock described in 4.5.1 shall also operate in a manner such that it will prevent the closing of the main contacts of the vacuum contactor unless the isolation switch is either fully opened or fully closed.

4.5.3An electrical interlock shall be provided as a backup to the mechanical interlock in 4.5.1. This interlock shall switch off control power to the vacuum contactor at any isolating switch position other than fully opened or fully closed.

4.5.4A mechanical interlock shall be provided between the isolation switch and the medium voltage compartment door. This interlock shall prevent the door from being opened unless the isolating switch is in the fully open position.

4.5.5The interlock described in 4.5.4 shall be capable of being circumvented in the event emergency entrance to the controller is required. Circumventing the interlock shall require two separate and distinct operations and shall require the use of a tool.

4.5.6A mechanical interlock between the isolation switch and the medium voltage door shall be provided to prevent the isolating switch from being closed when the door is open. This interlock shall be capable of being circumvented only by the use of a tool.

4.5.7An electrical interlock shall be provided to ensure the isolation switch does not open with the control power transformer under load. This interlock shall be designed such that during switch opening, the transformer secondary is disconnected prior to the opening of the switch blades. Also, the isolating switch blades must close before the secondary load is reconnected.

4.5.8An electrical interlock shall be provided to prevent the vacuum contactor from being closed using external test power unless the isolation switch is fully opened and the secondary of the normal control power transformer is disconnected from the control circuit to prevent backfeeding the transformer.

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Toshiba JK Series manual
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JK Series specifications

The Toshiba JK Series represents a significant advancement in the field of home appliances, specifically in cooking technology. This innovative range of microwave ovens combines cutting-edge features, energy efficiency, and sleek design, making them a standout choice for modern kitchens.

One of the primary characteristics of the Toshiba JK Series is its robust power capacity. Most models come equipped with high wattage, allowing them to cook food quickly and evenly. This feature is especially beneficial for busy households where time is of the essence. Additionally, the JK Series incorporates advanced heating systems that utilize a combination of microwave and grill functions, enabling users to achieve perfectly cooked meals with a crispy finish.

A key technology integrated into the Toshiba JK Series is the Smart Sensor function. This intelligent feature adjusts cooking times and power levels based on the moisture levels of the food, ensuring optimal results every time. Users can easily reheat leftovers or cook fresh ingredients without the guesswork typically associated with microwave cooking. This smart approach not only enhances convenience but also promotes energy efficiency, targeting precision in both cooking and power consumption.

Another notable aspect of the Toshiba JK Series is its user-friendly interface. Many models feature a large LED display and intuitive controls, allowing for seamless navigation through various cooking settings. The series often includes pre-programmed options for common foods, such as popcorn, pizza, and vegetables, making meal preparation straightforward and efficient.

In addition to functionality, Toshiba emphasizes safety in the JK Series. Models typically come with child safety locks to prevent accidental operation, giving parents peace of mind. Furthermore, the durable materials used in construction ensure longevity and reliability, making the JK Series a worthwhile investment for any kitchen.

The stylish design of the Toshiba JK Series also deserves mention. With a contemporary finish and compact form factor, these microwave ovens can easily complement any kitchen décor, enhancing overall aesthetic appeal.

In summary, the Toshiba JK Series is a well-rounded choice for consumers looking for powerful, efficient, and stylish microwave ovens. Its combination of smart technology, user-friendly features, safety considerations, and appealing design solidifies its reputation as a leading option in modern cooking appliances. Whether for reheating or cooking, the JK Series is designed to meet the demands of today’s fast-paced lifestyles while ensuring high-quality results.
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