The RMS voltage monitoring relay PMSA is a universal 2, 3, 4 and 5 wire Multi-voltage unit that measures under as well as over voltages in star or delta configuration. The PMSA is designed to fulfill the demand for one unit for all applications in order to reduce overall costs. The PMSA is build with a strong MCU that can handle 40000 13bit voltage samples/sec for a precise and true RMS conversion.
The two internal relays can be used for Phase and Neutral to Ground voltage measurements, or one relay can be used for Phase measurements and the other relay dedicated for Neutral to Ground measurement.
Application
Generally where humans and equipment have to be protected against unexpected voltages caused by broken wires - especially the Neutral - or voltages that are not within acceptable limits for the connected equipment.
Input
- AC voltage 45…66Hz
- Range - Connection type 1-3 50…480V N-Phase
- Range - Connection type 4-5 86…830V Phase-Phase
- Input resistance N-L1, N-L2, N-L3, N-PE 1Mohm
- Supply Range 18…288VAC, 20…400VDC
- Fuse Internal 400mA in A1
- Breaking capacity 100A / 250Vdc/ac
- Power consumption Max 4W
Output
- RELAY 2 C/O or 2 x 1 C/O for separate Over & Under voltage monitoring or 1 C/O dedicated for Neutral to Ground monitoring
- Contact rating 6A, 250VAC, 1500W, AgNi
- Mechanical life 30 million operations
