Bender GmbH & Co. KG
About us
The Bender Group is a globally active medium-sized family company and leading provider of top-class electrical safety products and solutions.
The range covers applications in the field of mobility for electric or hybrid vehicles, energy generation and distribution, regenerative energy extraction and applications in building technology and various other industrial areas. The development and production of components for the sensitive medical sector is one of the key focus areas for products.
Bender is represented in more than 100 countries around the world. Outside Germany, 15 companies belong to the Bender Group. It currently employs worldwide 1,350 (2024) people and records an annual turnover of over 290 million euros (2024). More than 15 percent of the employees work in research and development. Production is at two sites in Germany. Bender products and solutions are available around the globe.
The company with its headquarters and innovation center in Grünberg, Hesse, is 100 percent in family ownership. Further innovation sites are in Berlin and Dresden.
Address
Londorfer Str. 65
35305 Gruenberg
Germany
E-mail: info@bender.de
Phone: +49 6401 807-0
Internet: www.bender.de
Graha Arteri Mas, Kav. 27 JI. Panjang No. 68, Kedoya Selatan
11520 Jakarta Barat
Indonesia
E-mail: apandi@tirtajayaprima.com
Phone: +62 8151 4310733
1 North Coast Avenue #03-01
737663 Singapore
Singapore
E-mail: harvard.loh@bender-apac.com
Phone: +65 8082 0249
Internet: www.bender.de
Contact person:
Harvard Loh
Business Development Manager
E-mail: harvard.loh@bender-apac.com
Phone: +65 8082 0249
Products & Services
Earth leakage, also known as ground or leakage fault, can lead to serious consequences like electric shock, fires, and equipment damage. It occurs when electrical current unexpectedly flows to the ground, often due to insulation breakdown or equipment failure.
Bender Insulation monitoring devices (IMD) continuously monitor the insulation resistance of IT systems (unearthed systems) and issue an alarm if the value falls below a response value. It can work with insulation fault locator to detect the faulty channel/circuit, providing electrical safety 24/7.
Bender Residual current monitors (RCM) are used to monitor earthed systems (TN and TT systems) for fault currents or residual currents. The sum of all conductors except the protective earth conductor is measured by means of measuring current transformers. In general, RCM are used to send a message to the user even before reaching the shutdown threshold of the RCD. Residual current monitors detect deteriorations of the insulation level at an early stage and in a reliable way
RCMS425
The LINETRAXX® SmartDetect RCMS410/RCMS425-L/RCMS425-D is an AC, pulsed DC, and smooth DC sensitive residual-current monitor for earthed power-supply systems. It measures residual currents between 2 mA and 70 A with direct voltage as well as alternating voltage in a frequency range from 15 Hz to 20 kHz.
Corresponding measuring-current transformers (e. g. CTUB100 and CTAC series) must be connected to the residual current inputs.
Individual response values for pre-warning and main alarm can be set for each channel, and the response value can be chosen from the RMS value of AC and DC or the individual AC and DC components.
The alarm is indicated by alarm LEDs (RCMS410 and RCMS425-L) or on an TFT display (RCMS425-D). Alarm signalling is also possible via the digital outputs and via the Modbus RTU interface.
Despite its small size and compact design, the RCMS410 is a top performer. It can be operated with a DC 24 V power supply.
All devices have variety digital inputs and outputs, as well as an analogue output.
The communication with higher-level systems . The parameters required for electrical systems can be set either via Modbus RTU or via the NFC interface and the Bender Connect App. It is also possible to preset the operating parameters ex works.
Various functions can be added to the devices using function modules.
ISOMETER® isoPV1685
For large photovoltaic systems up to AC 1000 V / DC 1500 V
2 Separately adjustable response values 200 Ω...200 kΩ
Automatic adaptation to the system leakage capacitance
up to 4000 μFModbus RTU interface for connection to monitoring systems
User-friendly operation through integrated display
The device is used for insulation of large photovoltaic systems up to AC 1000 V/DC 1500 V designed as IT systems. The measurement method specially developed for slow voltage fluctuations (MPP tracking) monitors the insulation resistance even in systems equipped with large solar generator panels where extremely high system leakage capacitances up to 4000 µF against earth exist due to interference suppression methods.
ISOMETER® iso685
-Reliable measurement of insulation resistance, voltage, capacitance and frequency
Integrated web server
Modbus TCP/RTU
History memory
The ISOMETER® is an insulation monitoring device in accordance with IEC 61557-8 for IT systems.
The devices are universally applicable in AC, 3(N)AC, AC/DC and DC systems. AC systems may include extensive DC-supplied loads (such as rectifiers, inverters, variable speed drives).
RCMS460/490
Alternating, pulsating or AC/DC sensitive measurements can optionally be carried out by selecting the measuring current transformer for each channel
Analysis of the harmonics, DC, THF
Adjustable frequency response for protection of persons, fire protection, plant protection
The RCMS system consists of one or more RCMS460-D/-L or RCMS490-D/-L residual current monitors, which are able to detect and evaluate fault, residual and operating currents in earthed power supplies via the related measuring current transformers. The maximum voltage of the system to be monitored depends on the nominal insulation voltage of the measuring current transformer used in the case of busbar systems, resp. depend on the cables or conductors that are routed through.
Closed CTBS25 or CTUB100 series measuring current transformers are required to measure AC/DC sensitive residual currents (according to IEC/TR 60755: Type B). They require one 24 V DC power supply unit (e.g. STEP-PS series). CTAC… (closed), WR (rectangular), WS (split-core) and WF… (flexible) series measuring current transformers are used for alternating and pulsating currents (according to IEC/TR 60755: Type A).
Any combination of the various measuring current transformer series can be connected to the monitor measuring channels. Each RCMS460-D/-L and RCMS490-D/-L has 12 measuring channels. Up to 90 residual current monitors can be connected via a BMS bus (RS-485 interface with BMS protocol), thereby up to 1080 measuring channels (sub-circuits) can be monitored.
If this product is to be used for personnel, fire or plant protection, the frequency response can be set accordingly. The measured currents can be analysed for harmonics.
