YAR and YARP - power boxes

YAR and YARP

Power boxes YARP-11 are designed for switching and protecting electrical circuits from overload currents and short-circuit currents. The series includes: YARP-11-31-54-UKHL3, YARP-11-35-54-UKHL3, YARP-11-37-54-UKHL3, YARP-11-39-54-UKHL3. 

Purpose:

Power boxes YARP-11 are designed for switching and protecting electrical circuits from overload currents and short-circuit currents. The series includes: YARP-11-31-54-UKHL3, YARP-11-35-54-UKHL3, YARP-11-37-54-UKHL3, YARP-11-39-54-UKHL3. 
Power boxes of the YARP-11 series are designed for switching and protecting electrical circuits from overload currents and short-circuit currents.

Main advantages:

• High quality;
• Degree of protection IP54.

Structure of the symbol:

YARP-11-XX-XX-XXXX

YARP  - a box with a switch and fuses

11  - conditional series number

XX  - conventional designation of the nominal current value:

31 - 100A;
35 - 250A;
37 - 400A;
39 - 630A.

XX  - protection level according to GOST 14254

ХХХХ  - conventional designation of climatic version and placement category according to GOST 15150

Technical characteristics of the YARP-11 boxes:

Schematic diagram of the power box:


Application areas  – mechanical engineering and fuel and energy complexes, energy enterprises, housing and utilities, railway transport, nuclear power plant facilities. Installed:
● Directly on building structures;
● In ground-based stationary complete devices;
● Input and distribution devices of residential, public and industrial buildings, distribution cabinets and points, transformer substations, control cabinets and boxes, nuclear power plant facilities.

Operating conditions:

• altitude above sea level no more than 2000 m
• in terms of the impact of climatic factors of the external environment - execution of UHL and T categories of placement 3 and 1 according to GOST 15150-69.
• in terms of the impact of mechanical factors – group of operating conditions M3 according to GOST 17516.1-90;
• degree of environmental pollution – 3. The environment must correspond to the design of the switchgear and control panel in terms of their degree of protection according to GOST 14255 and must not contain gases, liquids and dust in concentrations that disrupt the operation of the switchgear and control panel.
• continuous operating mode
• working position in space – vertical.
• The rated working current of boxes with protection class IP32 at an ambient temperature above 20 °C must be reduced by 5% for every 10 °C. The rated working current of boxes with protection class IP54 must be reduced by 20%.

Design:

The low-voltage switchgear units are stationary low-voltage complete devices consisting of a metal casing in which a mounting panel is installed. The devices are placed on the panel. The design of the low-voltage switchgear unit ensures that the switching device is interlocked with the box door in such a way that when the switching device is on, the box door cannot be opened without breaking the interlock. The switching device is switched on and off using a drive handle installed on the side wall of the casing.
The operation of the low-voltage switchgear unit must be carried out in accordance with the requirements of the "Rules for the technical operation of consumer electrical installations". Switching the switching device of the low-voltage switchgear unit must be carried out with the box door closed. The box casing must be grounded in accordance with the requirements of GOST 12.2.007.0-75.

Overall dimensions:


Laying wires and cables in UVN cabinets that do not belong to this cabinet is not allowed. In exceptional cases, when fulfilling the requirement leads to a significant complication of installation or design, it is permissible to lay these wires and cables in pipes or boxes.