Megger TM1800, Руководство пользователя

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CG0757JE ZP-CG01E TM1800 27
4 MODULES
Note Auxiliary contact timing is measured for single
operation. Depending on time lapse between
O and C pulse timing may work for combined
operations. When there are auxiliary contacts
in series the result is dependent on both con-
tacts and it is not possible to distinguish each
contact separately.
For specifications, see “Control module” in chapter 9
Specifications.
Terminal configuration
The module has safety connectors. Use cables with
touch-proof plug contacts. The terminals are grouped
in three similar sections A,B and C suited for 3-phase
operation or for close, open and motor operations in
1-phase system.
IN connect the supply (+)
OUT connect to close/open circuit of the circuit breaker
0V connect zero (-) if needed
NC (No Connection) This is a blind terminal that can
be used for temporary placement, for safety, of
cable plugs when you want to disconnect coil
circuits.
Number of modules needed
Normally you need one or two modules.
„ „
1 module to operate circuit breakers with 3-phase
operation mechanism.
„ „
1 module more to operate circuit breakers with 1-phase
operating mechanism.
4.2 DCM module
The DCM module uses a measuring technology called
Dynamic Capacitive Measurement. One pair of DCM
and Timing M/R modules measures timing on up to
six breaks (e.g. three phase circuit breakers with two
breaks per phase) with both sides grounded, Dual-
Ground™ technology. The TM1800 system can be
equipped with multiple DCM and Timing M/R module
pairs that enable timing measurement on up to 18
breaks.
For specifications, see “DCM Module” in chapter
9 Specifications.
Using the DCM module and the DualGround technology
makes testing a lot safer.