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6.3 Installation of accessories
Accessories for the molded case circuit breaker VA-99M with thermomagnetic
trip unit shall not be installed to the molded case circuit breaker VA-99M with
electronic trip unit, and accessories for the molded case circuit breaker VA-99M
with electronic trip unit shall not be installed to the molded case circuit breaker
VA-99M with thermomagnetic trip unit.
Only internal mounting accessories can be used.
6.4 Integrated motor mechanism (VA-99M 1250A and 1600A)
The motor mechanism has 2 modes of operation: manual and automatic. The
mode switch is located on the front panel of the motor mechanism. In manual
mode, the molded case circuit breaker is operated by the extended rotary
handle. In automatic mode, the molded case circuit breaker is controlled
remotely. The motor mechanism control circuits are connected to terminals
located on the side of the motor mechanism
Contacts 1(L) and 4(N) are used to supply power to the motor mechanism, the
ON and OFF buttons with spring return are connected to contacts 2 and 3, these
buttons control the motor mechanism. Contact 5 is for earthing. The "ON"
button is used to turn the handle of the molded case circuit breaker to the "ON"
position. The "OFF" button is used to turn the handle of the molded case circuit
breaker to the "OFF" position.
By protection method against electric shock, molded case circuit breakers
VA-99M belong to protection class "0" according to IEC 61140 and shall
be installed in distribution enclosures with protection degree of min.
IP30 according to IEC 60529:2013.
8.1 The molded case circuit breakers VA-99M can be transported by any type
of enclosed transport that ensures the protection of packed products against
mechanical and atmospheric impacts.
8.2 The molded case circuit breakers VA-99M shall be stored in the original
package indoors at the ambient temperatures from –40°C to +50°C and relative
humidity of max. 85% at +25 ° C.
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