Monitoring relay PRI-51 serves to monitor current level in one-phase AC circuits. Gradual setting of actuating current of monitoring relay enables many different applications. Output relay is in normal state opened. After the set current level is reached, relay closes after the set delay (0.5…10s). When returning from faulty to normal state there is a hystersis (5%). Multi-voltage of this relay is an advantage. It is possible to monitor load which doesn´t have the same supply as monitoring relay PRI-51. Range of PRI-51 can be increased by an external current transformer.
Current monitoring relay PRI-51, monitoring of current by in-built transformer, 5 ranges.
Serves for monitoring of heating in rail-switches, heating cables, consumption of one-phase motors, indicates current flow.
Flexible adjustment by potentiometer, choice of 6 ranges:
AC 0.05…0.5A; AC 0.1…1A; AC 0.2…2A; AC 0.5…5A; AC 0.8…8A; AC 1.6…16A
Adjustable delay 0.5…10 s to eliminate short current peaks
Possible to use for current scanning from current transformer - up to 600A
Universal supply AC 24 - 240V and DC 24V
Supply is galvanically separated from measured current, it must be in the same phase
Output contact: 1 x changeover/ SPDT 8 A
1-phase, 1-MODULE, DIN rail mounting
(replacement for PRI-31)
