ABB VD4G-25 Installation And Operating Instructions Manual page 14

V D 4 G I N S TA L L AT I O N A N D O P E R AT I N G I N S T R U C T I O N S
14
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5. Description
5.6. Characteristics of the electrical accessories
Accessories with the same number are alternatives.
1 Shunt opening release (-MBO1)
Allows the device to be opened by remote control.
This release is suitable for both instantaneous and
permanent duty. However, an auxiliary contact
-BGB1 de-energizes it after the circuit-breaker has
opened. In the case of instantaneous service, the
current impulse must last at least 100 ms.
This release can be controlled by the following
devices: coil continuity control (CCC), opening
circuit supervision (TCS)(*) or the ABB STU
functionality control device (see accessory 19,
supplied on request).
Characteristics
Un
Un
Operating limits
Power at inrush (Ps)
Continuous power
consumption (Pc)
Electronics self-consumption
(no coil supplied); value
independent of voltage
applied
Opening time
nsulation voltage
I
(*) The minimum current
that the relay with TCS
function (used for
monitoring coil continuity)
detects as a condition
denoting that the trip
circuit is operating
correctly (specified for
each relay in the relative
manual), must be sensibly
higher than the current
consumption of the actual
coil (~1.5 mA).
If this fails to occur, always
add, in parallel to the TCS,
a circuit able to absorb
sufficient current to
compensate the gap while
preventing the total
current in the TCS circuit
from rising above the
maximum threshold (Itcs
< 10 mA for High Voltage
coils - from 110V to 250V,
and Itcs < 50 mA for Low
Voltage coils from 24 V to
60 V).
A simple resistor can be
sized for the purpose,
depending on the
parameters of the TCS and
the auxiliary voltage range
used.
48 - 110 ... 125 - 220 ... 250 Vdc
110 ... 125 - 220 ... 250 Vac
in accordance with IEC/IEEE
62271-37-013
60...100 W / VA
1.5 W
1.5 mA
33...60 ms
2000 V 50 Hz (for 1 min)
2 Additional shunt opening release (-MBO2)
Similarly to shunt opening release -MBO1, this al-
lows the opening command of the apparatus to be
transmitted by remote control. It can be energized
by the same circuit as main shunt opening release
-MBO1 or by a circuit completely separate from re-
lease -MBO1.
This release is suitable for both instantaneous and
permanent duty. However, an auxiliary contact
-BGB1 de-energizes it after the circuit-breaker has
opened.
To guarantee the release action, the current impulse
must last at least 100 ms.
Continuity functionality can be checked with a con-
tinuity control device (CCC), opening circuit supervi-
sion device (TCS)(*) or the STU functionality control
device (see accessory 19, supplied on request).
• MBO2 has the same electrical and operating cha-
racteristics as release -MBO1.