TAVRIDA ELECTRIC ISM15_LD_1 Series, Application Manual

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Breaker Type
To optimize the closing and trip pulses to the ISM actuators, this option sets various features of the CM_16 output power
algorithm. Each model type of the ISM_LD series breakers can be selected. Note that connection to an ISM other than the one
selected will produce a malfunction signal.
Undervoltage Functions
The CM_16 series has an option for automatic trip of the ISM on loss of auxiliary supply. The CM_16 will issue a trip
command when the auxiliary supply drops below its minimum threshold (6VDC for the CM_16_1(60) and 60VAC / VDC for the
CM_16_1(220) or CM_16_2(220)).
When set to „ON“, the undervoltage delay parameter becomes active. This can be set from 0 to 60 seconds delay before the CM
issues a trip command after loss of auxiliary power.
Similary, the undervoltage reclosing function becomes active. If set to „2“, the breaker will automatically close when auxiliary
power is restored with a delay time as set by the undervoltage reclosing delay parameter.
Digital Outputs
The CM_16 series has x3 output relays for external signalling such as lamps or relay alarm inputs. Each output has five settings
options. The output can be disabled; signal close / open position of the breaker primary contacts; signal a loss of auxiliary
supply; signal ready for operation; or signal a malfunction.
Trip / Close Delays
The ISM breaker series have high speed actuators for trip and close operations. The CM_16 by default is set for a 12ms trip and
close delay time for normal breaker operations. For arc flash mitigation, fast transfer, or other unique applications, this delay
time can be adjusted for trip and close independantly from 4ms to 40ms in 1ms increments. Note that for delay times less than
12ms the fault interrupting rating of the ISM may need to be reduced; consult Tavrida Applications Engineering for information.
Trip / Close Inputs
The CM_16 series use dry contact trip and close inputs, using any normally open contact by default as the trigger. For some
applications such as mining, a normally closed loop is required for the trip circuit whereby any break in the trip connection
will cause the breaker to open. For this purpose the CM_16 close and trip inputs can be set independantly for either NO or NC
triggers.
CM_16 Series Factory Programmable Options
The CM_16 series is a flexible control module option with an array of factory programmable settings for optimizing control of
the ISM breakers. When ordering a CM_16, the model code along with the pre-programmed settings code should be submitted to
Tavrida. Use the table on page xx for configuration of a settings code based on the following options guide:
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