TORUS WITH TEST WRAPPING
EARTH DIFFERENTIAL PROTECTION (TRIP)
This checks any leakage of current towards earth. When it trips the contact maker between connection 40-41 is opened, the contact can
be configured in NO/NC,. If while the unit is running the set current is exceeded by 50% the TRIP LED will flash rapidly.
The display shows the dispersion current, the programmed current, and the programmed delay.
The differential switch is equipped with a test coil that is triggered with the DIFFERENTIAL TEST. Using the command key combination,
+ / - (test led) and while these are pressed, press the RESET key that will trigger the devices. The TRIP LED remains lit steady and the
relay on 40-41 are triggered which remain saved until the RESET command is given.
Technical characteristics:
• Sensitive to wave forms type sinusoidal, choked sinusoidal, pulse and pulse with continuous component up to 6mA.
• Operating frequency 47 – 63 Hz.
• Tripping current I∆n programmable from 0.1 to 5 A or OFF excluded.
• Tripping time programmable from 0,5 to 5 seconds.
• Instantaneous tripping within 60 milliseconds.
• Negative safety (NA) modifying the output contact 40 –41.
• Adjustable to torus with 500 – 750 – 1000/1 shading coils and with test wrapping.
• Reset using the RESET push button enabled with current leakage less than 50% I∆n.
ATTENTION! It is not a lifesaver
OPERATING PRINCIPLE
The M02 uses a toroidal transformer on the load power supply line (fig. B) to constantly monitor the sum of the supply and return
currents. When the difference exceeds the set value, this indicates that part of the current is dispersed to earth, and after the relevant
delay the load is deactivated via commands 41 and 42.
This function is available from GCM02MP modules rel. 6.0 or superiors.
Connections
Fig. A shows the 67G earthed fault protection commonly used in generators, since in addition to protect the unit against direct contacts, it
also detects leakage to earth from the generator’s coils. The insulation between the neutral (N) and the earth (PE) must be checked on
setting the unit up, as any link between the two would by-pass the differential trip switch.
ADJUSTABLE TO TORUS WITH SHADING COILS REPORT 500/1 750/1 1000/1
PROGRAMMING
1. In the menu measurements, to program the shading coils report “REG. DIFFERENTIAL 500/1”; it is fundamental for the
correspondence of the reading with the value of foreseen intervention.
2. In the menu thresholds, to program the intervention current.
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