Description

Eaton MTK2000 Test Kit

2.2 Digitrip Long Time Function
Testing of the Trip Unit must be performed with the Trip Unit properly
installed in the breaker. The Long Time function has a memory circuit with a reset time of 36 times the Long Delay Time. The thermal
memory jumper may need to be relocated to disable the thermal
memory. This jumper is shipped from the factory in the “active”
position. (Reference Section 2.3, MTK2000 Breaker Cables) If a trip
function LED on the Trip Unit is lit prior to a test, press the Trip Reset
pushbutton on the Trip Unit. When bench testing a breaker wired for
zone interlock applications, MDS shorting plug 8779C02G06 should
be installed. (Reference Section 2.3. MTK2000 Breaker Cables)

2.3 MTK2000 Breaker Cables
The MTK2000 MDS Breaker Cable is used to connect the MTK2000
to the breaker’s trip unit. Before the MDS 14 pin MTK2000 plug is
inserted into the Digitrip verify the Long Time Memory (LTM) jumper
is in the inactive position, or it is removed. If it is in the active position, it must be removed or returned to the inactive position before
the adapter connector can be inserted. It is important to note that
all tests must be performed with the LTM jumper in the “inactive”
position.

2.5 Circuit Breaker Information
2.5.1 MTK2000 Tolerance Bands
The Long Delay Pickup point is normally set in the Digitrip at 110%
of the Long Delay Setting. The tolerance is ±5% of 110%. Long
Delay Times of the Trip Unit are top of band. The tolerance is
+0% /-30% of the Long Delay Time Setting. Short Delay Pickup,
Instantaneous, and Ground Fault Pickup values are mid-band, which
have ±10% tolerance. Short Delay Time and Ground Time require
curve for band tolerance.

2.5.2 Digitrip Test Guidelines
Testing of the Trip Unit must be performed with the Trip Unit properly
installed in the breaker. The Long Time function has a memory circuit with a reset time of 36 times the Long Delay Time. The thermal
memory jumper may need to be relocated to disable the thermal
memory. This jumper is shipped from the factory in the “active”
position. (Reference Section 2.3, MTK2000 Breaker Cables) If a trip
function LED on the Trip Unit is lit prior to a test, press the Trip Reset
pushbutton on the Trip Unit. When bench testing a breaker wired for
zone interlock applications, MDS shorting plug 8779C02G06 should
be installed (Reference Section 2.3, MTK2000 Breaker Cables).