Toshiba VF010H05 Manual Do Utilizador

•  Contactors: Vacuum contactors are provided for both In-Line Isolation and SCR 

Bypass. The contactor voltage ratings are: 7.2kV for 2300 - 6900V units.

 

A sequencing feature controls the contactors. Under normal operating conditions 

this ensures that both contactors make and break under no-load conditions to 

maximize contactor life. Vacuum contactors are rated for the maximum starting 

requirement of the unit design. The Bypass Contactor is rated to be capable 

of emergency start. For further information on the vacuum contactor, see the 

instruction manual on the vacuum contactor supplied with the equipment, and 

also either VF010H01 (400A Drawout Type) or VF010H03 (Fixed Type).

•  Soft Start Only Option: The JKSSS+ Series is also offered in an optional “Soft 

Start Only” package for use in retrofitting behind an existing customer supplied 

line start controller. In this configuration, 

Line Isolation Vacuum Contactor are NOT included in the JKSSS+ unit, so 

proper interlocking of sections containing medium voltage becomes the install-

er’s responsibility. 

 

All retrofit “Soft Start Only” packages must be used with complete line isola-

tion using a contactor or other “air-gap” device. The Optional “Soft Start Only” 

includes overload protection in normal operation mode and will sequence the 

isolation contactor, so all logic control should be done at the JKSSS+ control 

unit. Avoid turning the JKSSS+ on and off using the isolation device.

The JKSSS+ Series is a heavy duty design. Special consideration has been given 

to the enclosure and unit design to ensure that it is suitable for most applications and 

environments. 

•  Structure: 11 gauge frame with 16 gauge side, back and top sheets. Doors are 

12 gauge steel. The enclosure assembly is NEMA / EEMAC type 1 as standard. 

Type 12 and 3R are available as an option.

•  Sections: In a typical arrangement, each enclosure is divided vertically into 

three major compartments, each with a separate door. In the JK400, the upper-

most and lowermost compartments contain medium voltage controller compo-

nents (>600V) while the middle compartment contains low voltage components 

(<600V). Other variations of this basic arrangement are possible.

 

The 

Main Incoming Power Compartment houses the main disconnect switch, 

amain power fuses and input isolation contactor. A viewing window provides 

clear indication of the switch position without opening the compartment. 

Bus Compartment contains the horizontal bus bars (if provided). Top, bottom or 

side cable entry can be made with minimum bending.

 

One or more 

Starter Power Compartments contain the bypass vacuum con-

tactors, SCR power modules, instrument transformers and all other medium 

voltage devices. Adequate room is provided for motor lead connections to be 

made with minimum conductor bend.

 

A 

Low Voltage Control Compartment houses the digital microprocessor 

controller and LCD keypad operator interface, along with any other low voltage 

devices. This allows the operator to make adjustments without exposure to the 

line voltages.