M ED I U M VO LTAG E P R O D U C T S
29
29
reset) and “reclosing enabled” (the closing
command is accepted even if the opening
function for undervoltage is still active) can also
be selected (-SO4)
•
watchdog of the electronic power circuit with
feeder auto-shutdown in the case of
overtemperature and/or overcurrent
•
slow capacitor charging function (the charging
power passes from 100 watt to 40 watt, doubling
the charging time. This function is useful when
self-supply by means of a voltage transformer is
to be made)
•
monitoring continuity of the opening and closing
coils
•
management of opening attempts: after 10
unsuccessful opening attempts the control
electronics block and the DR and EN signalling
contacts are activated to indicate that the circuit
breaker is not ready for the operation
•
reclosing function according to the ANSI
standards (ANSI RECLOSE)
•
watchdog (DN)
•
limitation of the feeder connection current
•
serial RS232 for local connection (only to be used
by ABB personnel).
N.B. Some of the control module functions can be excluded/set by means of
special dip-switches on the card. Changing the dip-switch settings must
always be carried out with the control module de-energised and capacitor/s
discharged, both for safety of personnel and because the adjustments set
are only detected by the control electronics when it is turned on.
2 Circuit breaker auxiliary contacts
It is possible to have electrical signalling of circuit
breaker open/closed by means of make and break
contacts. The following configurations are
available.
For Fixed circuit breaker (-BB1; -BB2; -BB3; -BB8)
2A
Set of 5 make contacts plus 5 break contacts
2B
Set of 10 make contacts plus 10 break contacts
For withdrawable circuit breaker (-BB1; -BB2)
2C
Set of 5 break contacts plus 5 make contacts.
Characteristics
Un:
24 ... 250 V a.c.-d.c.
Rated current:
Ith
2
= 10 A
Insulation voltage:
2500 V 50 Hz (for 1 min)
Electrical resistance:
3 mOhm
Rated current and breaking capacity
in category AC11 and DC11:
Un
Cos
ϕ
T
In
Icu
220 V ~
0.7
--
2.5 A
25 A
24 V –
--
15 ms
10 A
12 A
60 V –
--
15 ms
6 A
8 A
110 V –
--
15 ms
4 A
5 A
220 V –
--
15 ms
1 A
2 A
3 Transmitted contacts in the truck (-BT1; -BT2)
Transmitted contacts of the withdrawable circuit
breaker (installed in the circuit breaker truck - only
for withdrawable circuit breaker for UniGear ZS1
switchgear and for PowerCube enclosure).
These contacts are either in addition or as an
alternative to the position contacts (for signalling
circuit breaker racked-out) located in the unit. They
also carry out the function of the position contact
(-BT3).
4 Position contact (-BT3)
The position contact (-BT3) is used, together with
binary input SL1, to prevent remote circuit breaker
closing during traverse into the unit. It is only
supplied for the withdrawable version circuit
breaker when the transmitted contacts in the truck
are not requested (-BT1; -BT2).
5 Motorised truck (-MT) (only for withdrawable
version circuit breaker for UniGear switchgear)
This allows the circuit breaker to be racked-in/out
of the switchgear remotely.
Characteristics
Un:
110 - 220 V–
Operating limits:
85 … 110% Un
Rated power (Pn):
40 W
6 Device for rapidly discharging the capacitor/s
Before accessing the circuits present in the control
box, it is compulsory to make sure that the
capacitor/s is/are discharged.
Even when there is no auxiliary power supply, more
than ten minutes are needed to completely
discharge the capacitor/s.
The rapid discharing device allows the waiting time
to be reduced to one minute and guarantees safe
access to the circuits which might be live.
Summary of Contents for VM1/A/P
Page 49: ...MEDIUM VOLTAGE PRODUCTS 49 49 ...
Page 51: ...MEDIUM VOLTAGE PRODUCTS 51 51 ...
Page 53: ...MEDIUM VOLTAGE PRODUCTS 53 53 ...
