TEOL600 traction switch remote control system

The remote control system for traction disconnectors of the TEOL type consists of two subsystems:

• TEOL K3 is designed to control disconnectors (or isolators) in the overhead traction network, equipped with electric drives powered by 230V 50Hz voltage (with 230V 50Hz motors or 24V DC motors powered by a rectifier). Additionally, these drives must have transformers that allow for their opening and closing by applying the appropriate control voltage in a three-wire system. This system also enables signaling of the disconnector's position and cable faults.

• TEOL600 is designed to control disconnectors in tramway or trolleybus overhead traction networks. A characteristic feature of this system is the power supply from the traction network voltage through a 600/24 V DC converter, which works with batteries. The drives controlling the disconnectors are powered by 24V DC.

The two subsystems—TEOL K3 and TEOL600—are connected by the overarching remote control system (SCADA). The TEOL K3 and TEOL600 systems work in conjunction with remote control centers for railway, tramway, and trolleybus traction throughout Poland. The disconnectors in SESTO's TEOL system can be remotely controlled from both existing remote control centers of third-party companies and from the proprietary SCADA system built on SESTO's ZEO software.

The SESTO TEOL600 system is used for controlling disconnectors in tram and trolleybus networks. The disconnector control cabinets in the TEOL600 system have plastic enclosures designed for mounting on traction poles. Depending on the configuration, these may be two separate cabinets—an upper one, called the high-voltage cabinet, and a lower one, called the communication cabinet—or a single two-compartment combined cabinet.

In the high-voltage compartment, you will find:

• surge protection devices,
• a 600/24 V DC converter,
• optionally, HVM600 measurement converters.

In the communication compartment, there are:

• E1000 GMR controller,
• buffer batteries,
• communication devices.

The TEOL600 system cabinets are equipped with SESTO's E1000 GMR controller, which manages and supervises the electrical system and ensures communication with the master system. A distinctive feature of this system is its power supply from the traction network via a 600/24 V DC converter that works with batteries. The drives controlling the disconnectors are powered by 24V DC. Thanks to monitoring traction voltages measured in the TEOL600 cabinets, voltage dips can be detected. The TEOL600 cabinet controller, E1000 GMR, has an integrated GSM modem, meaning each cabinet can be controlled via the GSM network. Additionally, cabinets can be equipped with fiber-optic communication devices.

Key functions of the TEOL600 system:

• control of disconnector position and operation,
• ability to control two disconnectors from one cabinet,
• remote and local operation,
• optional voltage measurements from the traction power supply cable side and the traction network side, and optionally, current measurements when the disconnector is closed (for sectional disconnectors),
• battery voltage measurement and protection against excessive battery discharge, performed by the controller,
• safe operation feature—continuation of a started operation in the event of a battery voltage drop.

Advantages of the TEOL600 system:

• quick reconfiguration of the traction network – In case of emergency, when, for example, a traction substation lacks power from the high-voltage network, its power supply area can be supplied from neighboring substations. The SCADA system from SESTO, based on the ZEO software, includes dispatcher support mechanisms where appropriate emergency response scenarios are defined. This allows the dispatcher to remain calm and quickly restore power, ensuring the continuation of city communication. The downtime in this case is counted in seconds, not hours, as would be the case if a traction emergency response team had to be dispatched for network reconfiguration,
• long battery life – The TEOL600 system cabinet can operate on battery power for up to 72 hours, depending on the number of operations and the GSM network range.