M ED I U M VO LTAG E P R O D U C T S
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6.9. Standard fittings
6.9.1. Standard fittings for circuit breakers
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 (DO1)
•
N. 1 contact signalling circuit breaker closed
(DC1)
•
N. 1 contact signalling circuit breaker ready for
the operation (capacitors charged and state of
the circuit breaker checked) (DR)
•
N. 1 contact signalling circuit breaker not ready
for the operation (DN, normally closed)
•
N. 1 transient contact with momentary closing
during the opening operation (DOR).
NOTE
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 logical
input activated)
• N. 1 input for opening command (-SO2) (top
logical input activated)
•
N. 1 input for additional opening command
(-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).
The binary inputs can be supplied as follows
- 24 ... 240 V AC (tolerance – 15% ... + 10%)
- 24 ... 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) isolating contacts
9) 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).
10) racking-in/out lever (the quantity must be
defined according to the number of pieces of
apparatus ordered)
11) truck locking electromagnet (only only for ABB
UniGear type switchgear).
Summary of Contents for VM1/A/P
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