NIWA BV 85 and NIWA 3S are isolation monitoring relays produced by Scharco, suitable for DC and AC, respectively monitoring 1 and 3 circuits.
This document provides technical data for the Scharco Elektronik GmbH NIWA BV 85 (for DC/AC, 1 circuit) and NIWA 3S (for AC, 3 circuits) insulation monitoring relays. These precision relays are designed to monitor welding current circuits and other applications, featuring LED indicators for fault, operation, and standby status. This manual is written in German.
| Operating Voltage | 24V, 230V 40/60Hz |
|---|---|
| Operating Temperature Range | -20°C to +60°C |
| Storage Temperature Range | -40°C to +80°C |
| Power Consumption | ca. 2.5 VA |
| Weight | ca. 600g |
| Max. Switching Power (AC) | 1500 VA AC |
| Mechanical Life | ca. 1x10^7 operations |
The delay time for detecting faults is less than 100 ms.
The maximum continuous current allowed per contact is 6A AC.