Product Description
BENDER RCMA472LY-21
The BENDER RCMA472LY-21 is an advanced AC/DC sensitive residual current monitor designed for earthed power systems (TN and TT systems). It is engineered to detect and evaluate AC, pulsating DC, and smooth DC residual currents, making it a universal current-sensitive monitor (Type B) according to IEC 62020-1. This device provides early detection of developing insulation faults, enhancing both operational safety and system availability. It is ideal for applications involving frequency converters, UPS systems, battery chargers, and other equipment that can generate smooth DC fault currents. The RCMA472LY-21 features two separately adjustable response values, allowing for a pre-alarm and a main alarm, which helps in planning maintenance and preventing unexpected shutdowns.
Technical Specifications:
- Model: RCMA472LY-21
- Monitoring Type: AC/DC sensitive residual current monitoring (Type B) acc. to IEC 62020-1
- Supply Voltage (US): AC/DC 24…240 V, 50…400 Hz
- Frequency Range (fₙ): 0…2000 Hz
- Response Value Range (IΔn1, IΔn2): 10 mA…10 A
- Operating Temperature: -25°C to +55°C
- Outputs: 2 x 1 changeover contact (Alarm relays AL1, AL2)
- Mounting: DIN rail mounting
BENDER RCMA472LY-21
The BENDER RCMA472LY-21 is a versatile Type B residual current monitor for detecting AC, pulsating DC, and smooth DC fault currents in earthed systems, ensuring high levels of electrical safety and system uptime.
