EOR transformer cabinets and boxes

The transformer enclosures and EOR cabinets are part of the NEO system designed for the heating of railway switches. The construction of trackside heating devices and their operation is directly derived from the regulatory acts of the infrastructure manager, as well as from the specifications of the essential terms of the order. Prior to delivery, detailed technical documentation must be prepared to meet both of these requirements.

The ST-type EOR transformer enclosure is intended for powering the electric heaters of railway switch heating systems. The purpose of the EOR enclosure is to provide electrical separation between the circuits powering the EOR (400/230V, 50Hz) and the heating elements of the resistors and switch closures. It is made in protection class II from polyester-glass composites, resistant to weather conditions and mechanical damage. It ensures protection for the electrical equipment and the separation transformers installed inside. The enclosures are standardly equipped with startup dampers and a cover opening signal.

EOR Box

The NEOR distribution cabinet is designed to control and supervise the operation of the electrical power supply circuits for railway switch heating. In the case of dual-function NEORS cabinets, it also controls the lighting power supply circuits. The control can be manual using buttons, bypassing the cabinet controller (Rapid controller), local from the controller panel, or remote from higher-level devices through the RS485 bus or Ethernet network (optionally via GSM/GPRS or wireless network).

Communication between devices is carried out using the MODBUS-RTU (RS485) or MODBUS-TCP/IP (for IP networks) protocol. Supervision of the output circuits of the cabinet is achieved through continuous monitoring of the circuits' operation, displaying collected information on the panel, and transmitting it through the communication network to higher-level devices. The cabinet, along with the connected detection devices (sensors) and actuating devices (heating circuits for switch blades and closure heating circuits, lighting power supply circuits), forms a standalone system that does not require connecting other devices. For correct operation in automatic mode, connection to a supervisory system is not necessary. Functions performed through the communication network are used for remote supervision of cabinet operations and potential configuration of operational parameters.

The basic functions of the EOR cabinets for EOR control include:

• Independent control of heating resistors and closure heaters in manual, remote (from the switch station or LSC), and automatic modes.
• Automatic activation of resistor heating during snowfalls.
• Automatic activation of resistor heating when snow is blown by trains and wind.
• Automatic activation of resistor heating during freezing rain.
• Automatic activation of resistor heating without precipitation during frosts.
• Switching off resistor heating after precipitation stops or the resistor has reached the set shutdown temperature.
• Activating closure heating when the temperature drops below the set threshold.
• Deactivating closure heating when the temperature returns above the set shutdown temperature.
• The system does not activate heating during non-freezing rain.

The basic functions of the dual-function cabinet include:

• Lighting control in manual, remote (from the switch station or LSC), and automatic modes.
• Automatic lighting control based on twilight sensor states and/or astronomical clock.
• Dimming of lighting through voltage control and DALI system control.

Additionally, the NEO system provides:

• Electrical and metrological parameter measurements.
• Power measurement for individual circuits.
• Measurement of energy consumption for switch heating.
• Measurement of energy consumption for lighting.
• Measurement of EOR operating times – separately for automatic and manual modes.
• Communication with the supervisory control system.
• Diagnostics of controlled EOR and lighting devices (including detection of faulty EOR heaters).
• Communication with the master supervisory and service controller.
• Communication with local controllers in other distribution cabinets.
• Event archiving.