Specifications

Plug-in Portable Test Unit (PTU)
MPRO17 test box shown above
Specially designed for reliable testing of the MCR
and HSISC protection systems on each phase, by
means of tertiary injection. The test unit is also used
to prove both overcurrent and earth fault
pick-up levels.Can also be employed to test for trip-
ping in order to verify efficient microprocessor opera-
tion. The test unit incorporates a set of rechargeable
batteries and includes a charger unit as standard.
Auxiliary Power Unit (APU)
Available to be fitted within the circuit breaker
cubicle, an APU ensures that M-PRO receives
independent and continuous power at all times.
The APU accepts any input supply voltage between
24V and 264V DC or 95V and 265V AC.
Maximum input current is 0.5 A.
1m length cable (twisted pair) should be used to
connect auxiliary supply and MPRO protection relay.
A.13
A
M-PACT
Plug-in Portable Power Box (PPB)
Applicable for M-PRO20-40
Adjustments to protection settings and curve
selection can be achieved when the circuit breaker
is open and there is no permanent auxiliary power
source available.
Power is provided by 3 x 9V PP3 size non
rechargeable batteries.