BENDER is one of the world's leading partners for electrical safety. The current LINETRAXX® devices with SensorPRO combine the best high-resolution measurement technology with open communication in a minimum of space. They offer new functionalities and are suitable for industrial applications, building automation and data centres, among others.
The current LINETRAXX® devices with SensorPRO feature the open interface RS-485 with Modbus RTU protocol and ensure fine-grained measurements up to 100 kHz. At the same time, they save space in the control cabinet and are easy to install.
The modular LINETRAXX® devices with SensorPRO consist of a current transformer module with electronic modules which can be plugged on as needed. The single-channel, AC/DC sensitive compact LINETRAXX® devices are particularly suitable for use in final circuits.
Whether current DGUV regulation 3 requirements (German Social Accident Insurance regulation 3) or upcoming standards - thanks to the open interface and pluggable electronic modules, LINETRAXX® devices with SensorPRO are already prepared for predictive maintenance and future industry 4.0 requirements.
Against the background of key topics such as Industry 4.0 and the Internet of Things (IoT), Bender is increasingly confronted with the requirements of modern applications. As a result, highly flexible solutions that cover a wide performance range are now usually required. Furthermore, there is an increasing demand in the markets for smart sensors that can be easily and quickly integrated into existing installations and systems.
An essential requirement for the products is therefore the ability to communicate – if possible via universal interfaces and protocols. To generate added value such as preventive maintenance and high availability from measurement data, the sensors must be able to transfer all values and states to higher-level monitoring solutions in which they are evaluated and interpreted/further processed. Additionally, data granularity is also gaining in importance, so that a large number of sensors that are as small and simple as possible are being frequently used in modern plants.
Market-driven solutions for modern applications
The requirements being placed on industrial systems and installations in terms of high availability are constantly increasing. This means that it is also becoming increasingly important to equip existing applications with monitoring technology so that downtimes can be reduced, for example by assisting with preventive maintenance. Options include installing residual current monitoring systems (RCMS), which also contributes to a reduction of the disconnection times required for insulation tests in line with DGUV (German Social Accident Insurance) Regulation 3.
The AC/DC sensitive residual current monitoring module monitors electrically earthed power supplies up to 300 V and connected loads up to nominal currents of 32 A for leakage and fault currents. The module is intended for installation in distribution equipment such as PDUs (Power Distribution Units), outlet boxes or multiple socket-outlets and is supplied with DC 12…24 V.
The RCMB131-02 is designed for installation in PDUs and outlet boxes. The module outputs the rms value of the residual current via a PWM output, which is read out and evaluated by a higher-level circuit.
The AC/DC sensitive MRCDB300 device series is used as additional protection (protection against indirect contact) in earthed systems (TN and TT systems) in which AC or DC fault currents may occur.
Part of these systems are particularly loads containing six-pulse rectifiers or one-way rectifiers with smoothing, such as converters, battery chargers, construction site equipment with frequency-controlled drives. When the response value IΔn2 (alarm) is reached, the output relays K1 and K2 switch.
By using an MRCDB300 module and a switching element with isolating properties, the device combination fulfils the requirements of IEC 60947-2 Annex M for an MRCD protective device.
The application is specifically intended for protection goals such as protection of persons, fire protection and plant protection. The switching element must not exceed a switch-off time of 20 ms.
The residual current monitoring modules each consist of the MRCDB300 evaluation electronics and a CTBC20(P)…210(P) series measuring current transformer core. To assemble a complete module, both the electronics and a measuring current transformer core are required; if ordered separately, these two components must then be plugged together and calibrated during commissioning.
The CTBC20P…210P series measuring current transformers feature an integrated magnetic shield and are suitable for applications with high load currents or inrush currents.
The CTUB100 series measuring current transformers are combinations of CTBC… measuring current transformer cores and CTUB10… electronic modules, which convert AC and DC currents into an evaluable measurement signal. The measurement signals can be evaluated using devices of the RCMA420/423 or RCMS460/490 series. The measuring current transformers are connected to the respective devices via a 2- or 6-core cable. They can be used in DC, AC, and 3(N)AC systems.
The CTUB101-CTBCxx measuring current transformers are intended for connection to devices of the RCMA420/423 series and are supplied directly from the evaluator with the supply voltage DC ±12 V via the 6-core cable.
The CTUB102-CTBCxx measuring current transformers are intended for connection to RCMS460/490. If the CTUB102-CTBCxx measuring current transformers are connected to an RCMS460/490 system, a DC 24 V power supply unit is required for the measuring current transformers, which is available as an accessory.
The measuring current transformer cores of the CTBC20P…210P series feature an integrated magnetic shield and are suitable for applications with high load currents or inrush currents.
The AC/DC sensitive residual current monitoring module monitors electrically earthed power supplies up to 300 V and connected loads up to nominal currents of 32 A for leakage and fault currents. The module is intended for installation in distribution equipment such as PDUs (Power Distribution Units), outlet boxes or multiple socket-outlets and is supplied with DC 12…24 V.
The RCMB131-01 is designed for installation in PDUs and outlet boxes. The module can communicate with a master via an RS-485 interface via Modbus RTU.
The RCMB131-02 is designed for installation in PDUs and outlet boxes. The module outputs the rms value of the residual current via a PWM output, which is read out and evaluated by a higher-level circuit.
The RCMB132-01 is designed for installation in PDUs and outlet boxes. The module can communicate with a master via an RS-485 interface via Modbus RTU. It is possible to connect several devices in a daisy chain. For this purpose, the RCMB132-01 provides two identical connectors for RS-485 (incl. power supply).
The residual current monitoring modules of the RCMB300 series are intended for measuring AC and DC fault currents in earthed systems (TN and TT systems). The modules are able to measure residual currents up to IΔ = 20 A in a frequency range of DC…100 kHz.
Two separately adjustable response values allow a distinction to be made between prewarning and alarm. When the response value IΔn2 (alarm) is reached, the output relays K1 and K2 switch.
The modules feature an RS-485 interface with Modbus RTU which can be used to transfer measured values and alarm values. Setting parameters is also possible via this interface.
The residual current monitoring modules each consist of the RCMB301 evaluation electronics and a CTBC20(P)…210(P) series measuring current transformer core. To assemble a complete module, both the electronics and a measuring current transformer core are required; if ordered separately, these two components must then be plugged together and calibrated during commissioning.
The measuring current transformer cores of the CTBC20P…210P series feature an integrated magnetic shield and are suitable for applications with high load currents or inrush currents.
