ABB VM1 Installation And Service Instructions Manual page 34

VM1 - USER MANUAL
34
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8. Circuit breaker characteristics
8.4. Standard fittings
8.4.1.
The basic versions of the fixed circuit breakers are
three-pole and fitted with:
• closing pushbutton (SC1)
• opening pushbutton (SO1)
• mechanical operation counter
• mechanical signalling device for circuit breaker
open/closed
• device for manual emergency opening
• crank handle for manual emergency opening (the
quantity must be defined according to the number
of pieces of apparatus ordered)
• lamp signalling "READY" for the operation (PRDY)
• capacitor/s for storing energy for the operation
• mobile connector for direct connection to the
sockets of the electronic module, to cable the
auxiliary circuits
• ED2.0 basic version control module. Two types of
feeders are available:
- Type 1: 24 ... 48 V AC / 24 ... 60 V DC
- Type 2: 100 ... 240 V AC / 110 ... 250 V DC
Preparation of the basic ED2.0 version control
module
1) signalling contacts without potential, fitted
with relays, with the following functions (for
the characteristics of the contacts without
potential see par. 8.5):
• N. 1 contact signalling circuit breaker open
• N. 1 contact signalling circuit breaker closed
• N. 1 contact signalling circuit breaker ready for
• N. 1 contact signalling circuit breaker not ready
• N. 1 transient contact with momentary closing
N.B. With the circuit breaker not supplied (without auxiliary power supply)
these contacts are open, except for the contact signalling circuit breaker
not ready for the operation (DN).
2) binary inputs (logical inputs) for remote
control:
• N. 1 input for closing command (-SC2) (top
• N. 1 input for opening command (-SO2) (top
• N. 1 input for additional opening command
Standard fittings for fixed version circuit
breakers
(DO1)
(DC1)
the operation (capacitors charged and state of
the circuit breaker checked) (DR)
for the operation (DN, normally closed)
during the opening operation (DOR).
logical input activated)
logical input activated)
(-SO3) (top logical input activated)
• N. 1 input for circuit breaker opening on direct
command from the PR512 protection release
(-SO5) (top logical input activated)
• N. 1 input for lock on closing command (the
same function as the one carried out by the
locking electromagnet in the mechanical drive
of the VM1 circuit breaker) (-SL1) (bottom
logical input activated).
Binary inputs can be powered as follows:
• 2 4 ... 240 V AC (tolerance – 15% ... + 10%)
• 2 4 ... 250 V DC (tolerance – 30% ... + 10%).
The minimum impulse time for it to be
considered valid is 20 ms.
The functions carried out by the control module
are:
1) auto-trip following detection of wrong circuit
breaker state (WRONG POSITION AUTO-TRIP)
2) auto-trip following lower capacitor charging
threshold than the minimum value required for
the opening operation (ENERGY FAILURE
AUTO-TRIP)
3) anti-pumping relay function (ANTIPUMP)
4) priority opening function (TRIP-FREE)
5) checking the capacitor load voltage with auto-
shutdown of the feeder when the maximum
charging level is exceeded
6) reclosing function (RECLOSE)
7) management of No. 10 opening attempts (in
the case of 10 unsuccessful attempts the
control module blocks).
Some of these control module functions can be
disabled by means of dip-switches present on the
card (see par. 7.1.7).
8.4.2. Standard fittings for withdrawable version
circuit breakers
The standard fittings are the same as those for
the fixed version circuit breaker plus:
• isolating contacts
• cord with connector (plug only) for auxiliary
circuits, with striker pin which does not allow the
plug to be inserted in the socket if the rated
current of the circuit breaker is different from the
rated current of the panel (only for ABB UniGear
type switchgear).
• racking-in/out lever (the quantity must be defined
according to the number of pieces of apparatus
ordered)
• truck locking electromagnet (only for ABB
UniGear type switchgear)