MM30-W
Doc. N° MO-0117-ING
Rev.
1
Pag.
4
of
29
Copyright - 2010 - Microener
a. Before removing a module, ensure that you are at the same electrostatic potential
as the equipment by touching the case.
b. Handle the module by its front-plate, frame, or edges of the printed circuit board.
Avoid touching the electronic components, printed circuit tracks or connectors.
c. Do not pass the module to any person without first ensuring that you are both at
the same electrostatic potential. Shaking hands achieves equipotential.
d. Place the module on an antistatic surface, or on a conducting surface which is at
the same potential as yourself.
e. Store or transport the module in a conductive bag.
More information on safe working procedures for all electronic equipment can be found
in BS5783 and IEC 147-OF.
1.10 - MAINTENANCE
Make reference to the instruction manual of the Manufacturer ;
maintenance must be carried-out by specially trained people and in strict conformity
with the safety regulations.
1.11 - FAULT DETECTION AND REPAIR
Internal calibrations and components should not be altered or replaced.
For repair please ask the Manufacturer or its authorised Dealers.
Misapplication of the above warnings and instruction relieves the Manufacturer of any liability.
2. GENERAL
Input currents are supplied to 3 current transformers: - two measuring phase current (the third current is
computed as vector sum of the two others) - one measuring the earth fault zero-sequence current.
Phase current rated input can be 1 or 5A (Selectable by movable bridges an relay card)
For zero-sequence current taps for 1A and 5A input are provided on relay's terminal board.
Phase-to-phase voltage input is supplied to one voltage transformer. Rated input voltage can be
adjusted from 100 to 125V
– 50 or 60Hz.
Make electric connection in conformity with the diagram reported on relay's enclosure.
Check that input currents are same as reported on the diagram and on the test certificate.
The auxiliary power is supplied by a built-in interchangeable module fully isolated an self
protected.
2.1 POWER SUPPLY
The relay can be fitted with two different types of
power supply
module :
24V(-20%) / 110V(+15%) a.c.
80V(-20%) / 220V(+15%) a.c.
a) -
b) -
24V(-20%) / 125V(+20%) d.c.
90V(-20%) / 250V(+20%) d.c.
Before energising the unit check that supply voltage is within the allowed limits.
